LCOV - code coverage report
Current view: top level - src/backend/parser - parse_utilcmd.c (source / functions) Hit Total Coverage
Test: PostgreSQL 18devel Lines: 1457 1618 90.0 %
Date: 2025-04-01 14:15:22 Functions: 28 28 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*-------------------------------------------------------------------------
       2             :  *
       3             :  * parse_utilcmd.c
       4             :  *    Perform parse analysis work for various utility commands
       5             :  *
       6             :  * Formerly we did this work during parse_analyze_*() in analyze.c.  However
       7             :  * that is fairly unsafe in the presence of querytree caching, since any
       8             :  * database state that we depend on in making the transformations might be
       9             :  * obsolete by the time the utility command is executed; and utility commands
      10             :  * have no infrastructure for holding locks or rechecking plan validity.
      11             :  * Hence these functions are now called at the start of execution of their
      12             :  * respective utility commands.
      13             :  *
      14             :  *
      15             :  * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
      16             :  * Portions Copyright (c) 1994, Regents of the University of California
      17             :  *
      18             :  *  src/backend/parser/parse_utilcmd.c
      19             :  *
      20             :  *-------------------------------------------------------------------------
      21             :  */
      22             : 
      23             : #include "postgres.h"
      24             : 
      25             : #include "access/amapi.h"
      26             : #include "access/htup_details.h"
      27             : #include "access/relation.h"
      28             : #include "access/reloptions.h"
      29             : #include "access/table.h"
      30             : #include "access/toast_compression.h"
      31             : #include "catalog/dependency.h"
      32             : #include "catalog/heap.h"
      33             : #include "catalog/index.h"
      34             : #include "catalog/namespace.h"
      35             : #include "catalog/pg_am.h"
      36             : #include "catalog/pg_collation.h"
      37             : #include "catalog/pg_constraint.h"
      38             : #include "catalog/pg_opclass.h"
      39             : #include "catalog/pg_operator.h"
      40             : #include "catalog/pg_statistic_ext.h"
      41             : #include "catalog/pg_type.h"
      42             : #include "commands/comment.h"
      43             : #include "commands/defrem.h"
      44             : #include "commands/sequence.h"
      45             : #include "commands/tablecmds.h"
      46             : #include "commands/tablespace.h"
      47             : #include "miscadmin.h"
      48             : #include "nodes/makefuncs.h"
      49             : #include "nodes/nodeFuncs.h"
      50             : #include "optimizer/optimizer.h"
      51             : #include "parser/analyze.h"
      52             : #include "parser/parse_clause.h"
      53             : #include "parser/parse_coerce.h"
      54             : #include "parser/parse_collate.h"
      55             : #include "parser/parse_expr.h"
      56             : #include "parser/parse_relation.h"
      57             : #include "parser/parse_target.h"
      58             : #include "parser/parse_type.h"
      59             : #include "parser/parse_utilcmd.h"
      60             : #include "parser/parser.h"
      61             : #include "rewrite/rewriteManip.h"
      62             : #include "utils/acl.h"
      63             : #include "utils/builtins.h"
      64             : #include "utils/lsyscache.h"
      65             : #include "utils/partcache.h"
      66             : #include "utils/rel.h"
      67             : #include "utils/ruleutils.h"
      68             : #include "utils/syscache.h"
      69             : #include "utils/typcache.h"
      70             : 
      71             : 
      72             : /* State shared by transformCreateStmt and its subroutines */
      73             : typedef struct
      74             : {
      75             :     ParseState *pstate;         /* overall parser state */
      76             :     const char *stmtType;       /* "CREATE [FOREIGN] TABLE" or "ALTER TABLE" */
      77             :     RangeVar   *relation;       /* relation to create */
      78             :     Relation    rel;            /* opened/locked rel, if ALTER */
      79             :     List       *inhRelations;   /* relations to inherit from */
      80             :     bool        isforeign;      /* true if CREATE/ALTER FOREIGN TABLE */
      81             :     bool        isalter;        /* true if altering existing table */
      82             :     List       *columns;        /* ColumnDef items */
      83             :     List       *ckconstraints;  /* CHECK constraints */
      84             :     List       *nnconstraints;  /* NOT NULL constraints */
      85             :     List       *fkconstraints;  /* FOREIGN KEY constraints */
      86             :     List       *ixconstraints;  /* index-creating constraints */
      87             :     List       *likeclauses;    /* LIKE clauses that need post-processing */
      88             :     List       *blist;          /* "before list" of things to do before
      89             :                                  * creating the table */
      90             :     List       *alist;          /* "after list" of things to do after creating
      91             :                                  * the table */
      92             :     IndexStmt  *pkey;           /* PRIMARY KEY index, if any */
      93             :     bool        ispartitioned;  /* true if table is partitioned */
      94             :     PartitionBoundSpec *partbound;  /* transformed FOR VALUES */
      95             :     bool        ofType;         /* true if statement contains OF typename */
      96             : } CreateStmtContext;
      97             : 
      98             : /* State shared by transformCreateSchemaStmtElements and its subroutines */
      99             : typedef struct
     100             : {
     101             :     const char *schemaname;     /* name of schema */
     102             :     List       *sequences;      /* CREATE SEQUENCE items */
     103             :     List       *tables;         /* CREATE TABLE items */
     104             :     List       *views;          /* CREATE VIEW items */
     105             :     List       *indexes;        /* CREATE INDEX items */
     106             :     List       *triggers;       /* CREATE TRIGGER items */
     107             :     List       *grants;         /* GRANT items */
     108             : } CreateSchemaStmtContext;
     109             : 
     110             : 
     111             : static void transformColumnDefinition(CreateStmtContext *cxt,
     112             :                                       ColumnDef *column);
     113             : static void transformTableConstraint(CreateStmtContext *cxt,
     114             :                                      Constraint *constraint);
     115             : static void transformTableLikeClause(CreateStmtContext *cxt,
     116             :                                      TableLikeClause *table_like_clause);
     117             : static void transformOfType(CreateStmtContext *cxt,
     118             :                             TypeName *ofTypename);
     119             : static CreateStatsStmt *generateClonedExtStatsStmt(RangeVar *heapRel,
     120             :                                                    Oid heapRelid,
     121             :                                                    Oid source_statsid,
     122             :                                                    const AttrMap *attmap);
     123             : static List *get_collation(Oid collation, Oid actual_datatype);
     124             : static List *get_opclass(Oid opclass, Oid actual_datatype);
     125             : static void transformIndexConstraints(CreateStmtContext *cxt);
     126             : static IndexStmt *transformIndexConstraint(Constraint *constraint,
     127             :                                            CreateStmtContext *cxt);
     128             : static void transformFKConstraints(CreateStmtContext *cxt,
     129             :                                    bool skipValidation,
     130             :                                    bool isAddConstraint);
     131             : static void transformCheckConstraints(CreateStmtContext *cxt,
     132             :                                       bool skipValidation);
     133             : static void transformConstraintAttrs(CreateStmtContext *cxt,
     134             :                                      List *constraintList);
     135             : static void transformColumnType(CreateStmtContext *cxt, ColumnDef *column);
     136             : static void setSchemaName(const char *context_schema, char **stmt_schema_name);
     137             : static void transformPartitionCmd(CreateStmtContext *cxt, PartitionCmd *cmd);
     138             : static List *transformPartitionRangeBounds(ParseState *pstate, List *blist,
     139             :                                            Relation parent);
     140             : static void validateInfiniteBounds(ParseState *pstate, List *blist);
     141             : static Const *transformPartitionBoundValue(ParseState *pstate, Node *val,
     142             :                                            const char *colName, Oid colType, int32 colTypmod,
     143             :                                            Oid partCollation);
     144             : 
     145             : 
     146             : /*
     147             :  * transformCreateStmt -
     148             :  *    parse analysis for CREATE TABLE
     149             :  *
     150             :  * Returns a List of utility commands to be done in sequence.  One of these
     151             :  * will be the transformed CreateStmt, but there may be additional actions
     152             :  * to be done before and after the actual DefineRelation() call.
     153             :  * In addition to normal utility commands such as AlterTableStmt and
     154             :  * IndexStmt, the result list may contain TableLikeClause(s), representing
     155             :  * the need to perform additional parse analysis after DefineRelation().
     156             :  *
     157             :  * SQL allows constraints to be scattered all over, so thumb through
     158             :  * the columns and collect all constraints into one place.
     159             :  * If there are any implied indices (e.g. UNIQUE or PRIMARY KEY)
     160             :  * then expand those into multiple IndexStmt blocks.
     161             :  *    - thomas 1997-12-02
     162             :  */
     163             : List *
     164       37244 : transformCreateStmt(CreateStmt *stmt, const char *queryString)
     165             : {
     166             :     ParseState *pstate;
     167             :     CreateStmtContext cxt;
     168             :     List       *result;
     169             :     List       *save_alist;
     170             :     ListCell   *elements;
     171             :     Oid         namespaceid;
     172             :     Oid         existing_relid;
     173             :     ParseCallbackState pcbstate;
     174             : 
     175             :     /* Set up pstate */
     176       37244 :     pstate = make_parsestate(NULL);
     177       37244 :     pstate->p_sourcetext = queryString;
     178             : 
     179             :     /*
     180             :      * Look up the creation namespace.  This also checks permissions on the
     181             :      * target namespace, locks it against concurrent drops, checks for a
     182             :      * preexisting relation in that namespace with the same name, and updates
     183             :      * stmt->relation->relpersistence if the selected namespace is temporary.
     184             :      */
     185       37244 :     setup_parser_errposition_callback(&pcbstate, pstate,
     186       37244 :                                       stmt->relation->location);
     187             :     namespaceid =
     188       37244 :         RangeVarGetAndCheckCreationNamespace(stmt->relation, NoLock,
     189             :                                              &existing_relid);
     190       37232 :     cancel_parser_errposition_callback(&pcbstate);
     191             : 
     192             :     /*
     193             :      * If the relation already exists and the user specified "IF NOT EXISTS",
     194             :      * bail out with a NOTICE.
     195             :      */
     196       37232 :     if (stmt->if_not_exists && OidIsValid(existing_relid))
     197             :     {
     198             :         /*
     199             :          * If we are in an extension script, insist that the pre-existing
     200             :          * object be a member of the extension, to avoid security risks.
     201             :          */
     202             :         ObjectAddress address;
     203             : 
     204          10 :         ObjectAddressSet(address, RelationRelationId, existing_relid);
     205          10 :         checkMembershipInCurrentExtension(&address);
     206             : 
     207             :         /* OK to skip */
     208           8 :         ereport(NOTICE,
     209             :                 (errcode(ERRCODE_DUPLICATE_TABLE),
     210             :                  errmsg("relation \"%s\" already exists, skipping",
     211             :                         stmt->relation->relname)));
     212           8 :         return NIL;
     213             :     }
     214             : 
     215             :     /*
     216             :      * If the target relation name isn't schema-qualified, make it so.  This
     217             :      * prevents some corner cases in which added-on rewritten commands might
     218             :      * think they should apply to other relations that have the same name and
     219             :      * are earlier in the search path.  But a local temp table is effectively
     220             :      * specified to be in pg_temp, so no need for anything extra in that case.
     221             :      */
     222       37222 :     if (stmt->relation->schemaname == NULL
     223       34008 :         && stmt->relation->relpersistence != RELPERSISTENCE_TEMP)
     224       31736 :         stmt->relation->schemaname = get_namespace_name(namespaceid);
     225             : 
     226             :     /* Set up CreateStmtContext */
     227       37222 :     cxt.pstate = pstate;
     228       37222 :     if (IsA(stmt, CreateForeignTableStmt))
     229             :     {
     230         480 :         cxt.stmtType = "CREATE FOREIGN TABLE";
     231         480 :         cxt.isforeign = true;
     232             :     }
     233             :     else
     234             :     {
     235       36742 :         cxt.stmtType = "CREATE TABLE";
     236       36742 :         cxt.isforeign = false;
     237             :     }
     238       37222 :     cxt.relation = stmt->relation;
     239       37222 :     cxt.rel = NULL;
     240       37222 :     cxt.inhRelations = stmt->inhRelations;
     241       37222 :     cxt.isalter = false;
     242       37222 :     cxt.columns = NIL;
     243       37222 :     cxt.ckconstraints = NIL;
     244       37222 :     cxt.nnconstraints = NIL;
     245       37222 :     cxt.fkconstraints = NIL;
     246       37222 :     cxt.ixconstraints = NIL;
     247       37222 :     cxt.likeclauses = NIL;
     248       37222 :     cxt.blist = NIL;
     249       37222 :     cxt.alist = NIL;
     250       37222 :     cxt.pkey = NULL;
     251       37222 :     cxt.ispartitioned = stmt->partspec != NULL;
     252       37222 :     cxt.partbound = stmt->partbound;
     253       37222 :     cxt.ofType = (stmt->ofTypename != NULL);
     254             : 
     255             :     Assert(!stmt->ofTypename || !stmt->inhRelations); /* grammar enforces */
     256             : 
     257       37222 :     if (stmt->ofTypename)
     258         122 :         transformOfType(&cxt, stmt->ofTypename);
     259             : 
     260       37204 :     if (stmt->partspec)
     261             :     {
     262        4922 :         if (stmt->inhRelations && !stmt->partbound)
     263           6 :             ereport(ERROR,
     264             :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
     265             :                      errmsg("cannot create partitioned table as inheritance child")));
     266             :     }
     267             : 
     268             :     /*
     269             :      * Run through each primary element in the table creation clause. Separate
     270             :      * column defs from constraints, and do preliminary analysis.
     271             :      */
     272      104594 :     foreach(elements, stmt->tableElts)
     273             :     {
     274       67632 :         Node       *element = lfirst(elements);
     275             : 
     276       67632 :         switch (nodeTag(element))
     277             :         {
     278       64154 :             case T_ColumnDef:
     279       64154 :                 transformColumnDefinition(&cxt, (ColumnDef *) element);
     280       63942 :                 break;
     281             : 
     282        2710 :             case T_Constraint:
     283        2710 :                 transformTableConstraint(&cxt, (Constraint *) element);
     284        2698 :                 break;
     285             : 
     286         768 :             case T_TableLikeClause:
     287         768 :                 transformTableLikeClause(&cxt, (TableLikeClause *) element);
     288         756 :                 break;
     289             : 
     290           0 :             default:
     291           0 :                 elog(ERROR, "unrecognized node type: %d",
     292             :                      (int) nodeTag(element));
     293             :                 break;
     294             :         }
     295             :     }
     296             : 
     297             :     /*
     298             :      * Transfer anything we already have in cxt.alist into save_alist, to keep
     299             :      * it separate from the output of transformIndexConstraints.  (This may
     300             :      * not be necessary anymore, but we'll keep doing it to preserve the
     301             :      * historical order of execution of the alist commands.)
     302             :      */
     303       36962 :     save_alist = cxt.alist;
     304       36962 :     cxt.alist = NIL;
     305             : 
     306             :     Assert(stmt->constraints == NIL);
     307             : 
     308             :     /*
     309             :      * Before processing index constraints, which could include a primary key,
     310             :      * we must scan all not-null constraints to propagate the is_not_null flag
     311             :      * to each corresponding ColumnDef.  This is necessary because table-level
     312             :      * not-null constraints have not been marked in each ColumnDef, and the PK
     313             :      * processing code needs to know whether one constraint has already been
     314             :      * declared in order not to declare a redundant one.
     315             :      */
     316       85472 :     foreach_node(Constraint, nn, cxt.nnconstraints)
     317             :     {
     318       11548 :         char       *colname = strVal(linitial(nn->keys));
     319             : 
     320       27218 :         foreach_node(ColumnDef, cd, cxt.columns)
     321             :         {
     322             :             /* not our column? */
     323       15646 :             if (strcmp(cd->colname, colname) != 0)
     324        4122 :                 continue;
     325             :             /* Already marked not-null? Nothing to do */
     326       11524 :             if (cd->is_not_null)
     327       11078 :                 break;
     328             :             /* Bingo, we're done for this constraint */
     329         446 :             cd->is_not_null = true;
     330         446 :             break;
     331             :         }
     332             :     }
     333             : 
     334             :     /*
     335             :      * Postprocess constraints that give rise to index definitions.
     336             :      */
     337       36962 :     transformIndexConstraints(&cxt);
     338             : 
     339             :     /*
     340             :      * Re-consideration of LIKE clauses should happen after creation of
     341             :      * indexes, but before creation of foreign keys.  This order is critical
     342             :      * because a LIKE clause may attempt to create a primary key.  If there's
     343             :      * also a pkey in the main CREATE TABLE list, creation of that will not
     344             :      * check for a duplicate at runtime (since index_check_primary_key()
     345             :      * expects that we rejected dups here).  Creation of the LIKE-generated
     346             :      * pkey behaves like ALTER TABLE ADD, so it will check, but obviously that
     347             :      * only works if it happens second.  On the other hand, we want to make
     348             :      * pkeys before foreign key constraints, in case the user tries to make a
     349             :      * self-referential FK.
     350             :      */
     351       36920 :     cxt.alist = list_concat(cxt.alist, cxt.likeclauses);
     352             : 
     353             :     /*
     354             :      * Postprocess foreign-key constraints.
     355             :      */
     356       36920 :     transformFKConstraints(&cxt, true, false);
     357             : 
     358             :     /*
     359             :      * Postprocess check constraints.
     360             :      *
     361             :      * For regular tables all constraints can be marked valid immediately,
     362             :      * because the table is new therefore empty. Not so for foreign tables.
     363             :      */
     364       36920 :     transformCheckConstraints(&cxt, !cxt.isforeign);
     365             : 
     366             :     /*
     367             :      * Output results.
     368             :      */
     369       36920 :     stmt->tableElts = cxt.columns;
     370       36920 :     stmt->constraints = cxt.ckconstraints;
     371       36920 :     stmt->nnconstraints = cxt.nnconstraints;
     372             : 
     373       36920 :     result = lappend(cxt.blist, stmt);
     374       36920 :     result = list_concat(result, cxt.alist);
     375       36920 :     result = list_concat(result, save_alist);
     376             : 
     377       36920 :     return result;
     378             : }
     379             : 
     380             : /*
     381             :  * generateSerialExtraStmts
     382             :  *      Generate CREATE SEQUENCE and ALTER SEQUENCE ... OWNED BY statements
     383             :  *      to create the sequence for a serial or identity column.
     384             :  *
     385             :  * This includes determining the name the sequence will have.  The caller
     386             :  * can ask to get back the name components by passing non-null pointers
     387             :  * for snamespace_p and sname_p.
     388             :  */
     389             : static void
     390        1296 : generateSerialExtraStmts(CreateStmtContext *cxt, ColumnDef *column,
     391             :                          Oid seqtypid, List *seqoptions,
     392             :                          bool for_identity, bool col_exists,
     393             :                          char **snamespace_p, char **sname_p)
     394             : {
     395             :     ListCell   *option;
     396        1296 :     DefElem    *nameEl = NULL;
     397        1296 :     DefElem    *loggedEl = NULL;
     398             :     Oid         snamespaceid;
     399             :     char       *snamespace;
     400             :     char       *sname;
     401             :     char        seqpersistence;
     402             :     CreateSeqStmt *seqstmt;
     403             :     AlterSeqStmt *altseqstmt;
     404             :     List       *attnamelist;
     405             : 
     406             :     /* Make a copy of this as we may end up modifying it in the code below */
     407        1296 :     seqoptions = list_copy(seqoptions);
     408             : 
     409             :     /*
     410             :      * Check for non-SQL-standard options (not supported within CREATE
     411             :      * SEQUENCE, because they'd be redundant), and remove them from the
     412             :      * seqoptions list if found.
     413             :      */
     414        1672 :     foreach(option, seqoptions)
     415             :     {
     416         376 :         DefElem    *defel = lfirst_node(DefElem, option);
     417             : 
     418         376 :         if (strcmp(defel->defname, "sequence_name") == 0)
     419             :         {
     420          44 :             if (nameEl)
     421           0 :                 errorConflictingDefElem(defel, cxt->pstate);
     422          44 :             nameEl = defel;
     423          44 :             seqoptions = foreach_delete_current(seqoptions, option);
     424             :         }
     425         332 :         else if (strcmp(defel->defname, "logged") == 0 ||
     426         330 :                  strcmp(defel->defname, "unlogged") == 0)
     427             :         {
     428           4 :             if (loggedEl)
     429           0 :                 errorConflictingDefElem(defel, cxt->pstate);
     430           4 :             loggedEl = defel;
     431           4 :             seqoptions = foreach_delete_current(seqoptions, option);
     432             :         }
     433             :     }
     434             : 
     435             :     /*
     436             :      * Determine namespace and name to use for the sequence.
     437             :      */
     438        1296 :     if (nameEl)
     439             :     {
     440             :         /* Use specified name */
     441          44 :         RangeVar   *rv = makeRangeVarFromNameList(castNode(List, nameEl->arg));
     442             : 
     443          44 :         snamespace = rv->schemaname;
     444          44 :         if (!snamespace)
     445             :         {
     446             :             /* Given unqualified SEQUENCE NAME, select namespace */
     447           0 :             if (cxt->rel)
     448           0 :                 snamespaceid = RelationGetNamespace(cxt->rel);
     449             :             else
     450           0 :                 snamespaceid = RangeVarGetCreationNamespace(cxt->relation);
     451           0 :             snamespace = get_namespace_name(snamespaceid);
     452             :         }
     453          44 :         sname = rv->relname;
     454             :     }
     455             :     else
     456             :     {
     457             :         /*
     458             :          * Generate a name.
     459             :          *
     460             :          * Although we use ChooseRelationName, it's not guaranteed that the
     461             :          * selected sequence name won't conflict; given sufficiently long
     462             :          * field names, two different serial columns in the same table could
     463             :          * be assigned the same sequence name, and we'd not notice since we
     464             :          * aren't creating the sequence quite yet.  In practice this seems
     465             :          * quite unlikely to be a problem, especially since few people would
     466             :          * need two serial columns in one table.
     467             :          */
     468        1252 :         if (cxt->rel)
     469         202 :             snamespaceid = RelationGetNamespace(cxt->rel);
     470             :         else
     471             :         {
     472        1050 :             snamespaceid = RangeVarGetCreationNamespace(cxt->relation);
     473        1050 :             RangeVarAdjustRelationPersistence(cxt->relation, snamespaceid);
     474             :         }
     475        1252 :         snamespace = get_namespace_name(snamespaceid);
     476        1252 :         sname = ChooseRelationName(cxt->relation->relname,
     477        1252 :                                    column->colname,
     478             :                                    "seq",
     479             :                                    snamespaceid,
     480             :                                    false);
     481             :     }
     482             : 
     483        1296 :     ereport(DEBUG1,
     484             :             (errmsg_internal("%s will create implicit sequence \"%s\" for serial column \"%s.%s\"",
     485             :                              cxt->stmtType, sname,
     486             :                              cxt->relation->relname, column->colname)));
     487             : 
     488             :     /*
     489             :      * Determine the persistence of the sequence.  By default we copy the
     490             :      * persistence of the table, but if LOGGED or UNLOGGED was specified, use
     491             :      * that (as long as the table isn't TEMP).
     492             :      *
     493             :      * For CREATE TABLE, we get the persistence from cxt->relation, which
     494             :      * comes from the CreateStmt in progress.  For ALTER TABLE, the parser
     495             :      * won't set cxt->relation->relpersistence, but we have cxt->rel as the
     496             :      * existing table, so we copy the persistence from there.
     497             :      */
     498        1296 :     seqpersistence = cxt->rel ? cxt->rel->rd_rel->relpersistence : cxt->relation->relpersistence;
     499        1296 :     if (loggedEl)
     500             :     {
     501           4 :         if (seqpersistence == RELPERSISTENCE_TEMP)
     502           0 :             ereport(ERROR,
     503             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
     504             :                      errmsg("cannot set logged status of a temporary sequence"),
     505             :                      parser_errposition(cxt->pstate, loggedEl->location)));
     506           4 :         else if (strcmp(loggedEl->defname, "logged") == 0)
     507           2 :             seqpersistence = RELPERSISTENCE_PERMANENT;
     508             :         else
     509           2 :             seqpersistence = RELPERSISTENCE_UNLOGGED;
     510             :     }
     511             : 
     512             :     /*
     513             :      * Build a CREATE SEQUENCE command to create the sequence object, and add
     514             :      * it to the list of things to be done before this CREATE/ALTER TABLE.
     515             :      */
     516        1296 :     seqstmt = makeNode(CreateSeqStmt);
     517        1296 :     seqstmt->for_identity = for_identity;
     518        1296 :     seqstmt->sequence = makeRangeVar(snamespace, sname, -1);
     519        1296 :     seqstmt->sequence->relpersistence = seqpersistence;
     520        1296 :     seqstmt->options = seqoptions;
     521             : 
     522             :     /*
     523             :      * If a sequence data type was specified, add it to the options.  Prepend
     524             :      * to the list rather than append; in case a user supplied their own AS
     525             :      * clause, the "redundant options" error will point to their occurrence,
     526             :      * not our synthetic one.
     527             :      */
     528        1296 :     if (seqtypid)
     529        1284 :         seqstmt->options = lcons(makeDefElem("as",
     530        1284 :                                              (Node *) makeTypeNameFromOid(seqtypid, -1),
     531             :                                              -1),
     532             :                                  seqstmt->options);
     533             : 
     534             :     /*
     535             :      * If this is ALTER ADD COLUMN, make sure the sequence will be owned by
     536             :      * the table's owner.  The current user might be someone else (perhaps a
     537             :      * superuser, or someone who's only a member of the owning role), but the
     538             :      * SEQUENCE OWNED BY mechanisms will bleat unless table and sequence have
     539             :      * exactly the same owning role.
     540             :      */
     541        1296 :     if (cxt->rel)
     542         246 :         seqstmt->ownerId = cxt->rel->rd_rel->relowner;
     543             :     else
     544        1050 :         seqstmt->ownerId = InvalidOid;
     545             : 
     546        1296 :     cxt->blist = lappend(cxt->blist, seqstmt);
     547             : 
     548             :     /*
     549             :      * Store the identity sequence name that we decided on.  ALTER TABLE ...
     550             :      * ADD COLUMN ... IDENTITY needs this so that it can fill the new column
     551             :      * with values from the sequence, while the association of the sequence
     552             :      * with the table is not set until after the ALTER TABLE.
     553             :      */
     554        1296 :     column->identitySequence = seqstmt->sequence;
     555             : 
     556             :     /*
     557             :      * Build an ALTER SEQUENCE ... OWNED BY command to mark the sequence as
     558             :      * owned by this column, and add it to the appropriate list of things to
     559             :      * be done along with this CREATE/ALTER TABLE.  In a CREATE or ALTER ADD
     560             :      * COLUMN, it must be done after the statement because we don't know the
     561             :      * column's attnum yet.  But if we do have the attnum (in AT_AddIdentity),
     562             :      * we can do the marking immediately, which improves some ALTER TABLE
     563             :      * behaviors.
     564             :      */
     565        1296 :     altseqstmt = makeNode(AlterSeqStmt);
     566        1296 :     altseqstmt->sequence = makeRangeVar(snamespace, sname, -1);
     567        1296 :     attnamelist = list_make3(makeString(snamespace),
     568             :                              makeString(cxt->relation->relname),
     569             :                              makeString(column->colname));
     570        1296 :     altseqstmt->options = list_make1(makeDefElem("owned_by",
     571             :                                                  (Node *) attnamelist, -1));
     572        1296 :     altseqstmt->for_identity = for_identity;
     573             : 
     574        1296 :     if (col_exists)
     575         160 :         cxt->blist = lappend(cxt->blist, altseqstmt);
     576             :     else
     577        1136 :         cxt->alist = lappend(cxt->alist, altseqstmt);
     578             : 
     579        1296 :     if (snamespace_p)
     580         834 :         *snamespace_p = snamespace;
     581        1296 :     if (sname_p)
     582         834 :         *sname_p = sname;
     583        1296 : }
     584             : 
     585             : /*
     586             :  * transformColumnDefinition -
     587             :  *      transform a single ColumnDef within CREATE TABLE
     588             :  *      Also used in ALTER TABLE ADD COLUMN
     589             :  */
     590             : static void
     591       66186 : transformColumnDefinition(CreateStmtContext *cxt, ColumnDef *column)
     592             : {
     593             :     bool        is_serial;
     594             :     bool        saw_nullable;
     595             :     bool        saw_default;
     596             :     bool        saw_identity;
     597             :     bool        saw_generated;
     598       66186 :     bool        need_notnull = false;
     599       66186 :     bool        disallow_noinherit_notnull = false;
     600       66186 :     Constraint *notnull_constraint = NULL;
     601             : 
     602       66186 :     cxt->columns = lappend(cxt->columns, column);
     603             : 
     604             :     /* Check for SERIAL pseudo-types */
     605       66186 :     is_serial = false;
     606       66186 :     if (column->typeName
     607       65840 :         && list_length(column->typeName->names) == 1
     608       28190 :         && !column->typeName->pct_type)
     609             :     {
     610       28190 :         char       *typname = strVal(linitial(column->typeName->names));
     611             : 
     612       28190 :         if (strcmp(typname, "smallserial") == 0 ||
     613       28182 :             strcmp(typname, "serial2") == 0)
     614             :         {
     615          14 :             is_serial = true;
     616          14 :             column->typeName->names = NIL;
     617          14 :             column->typeName->typeOid = INT2OID;
     618             :         }
     619       28176 :         else if (strcmp(typname, "serial") == 0 ||
     620       27378 :                  strcmp(typname, "serial4") == 0)
     621             :         {
     622         798 :             is_serial = true;
     623         798 :             column->typeName->names = NIL;
     624         798 :             column->typeName->typeOid = INT4OID;
     625             :         }
     626       27378 :         else if (strcmp(typname, "bigserial") == 0 ||
     627       27368 :                  strcmp(typname, "serial8") == 0)
     628             :         {
     629          22 :             is_serial = true;
     630          22 :             column->typeName->names = NIL;
     631          22 :             column->typeName->typeOid = INT8OID;
     632             :         }
     633             : 
     634             :         /*
     635             :          * We have to reject "serial[]" explicitly, because once we've set
     636             :          * typeid, LookupTypeName won't notice arrayBounds.  We don't need any
     637             :          * special coding for serial(typmod) though.
     638             :          */
     639       28190 :         if (is_serial && column->typeName->arrayBounds != NIL)
     640           0 :             ereport(ERROR,
     641             :                     (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
     642             :                      errmsg("array of serial is not implemented"),
     643             :                      parser_errposition(cxt->pstate,
     644             :                                         column->typeName->location)));
     645             :     }
     646             : 
     647             :     /* Do necessary work on the column type declaration */
     648       66186 :     if (column->typeName)
     649       65840 :         transformColumnType(cxt, column);
     650             : 
     651             :     /* Special actions for SERIAL pseudo-types */
     652       66148 :     if (is_serial)
     653             :     {
     654             :         char       *snamespace;
     655             :         char       *sname;
     656             :         char       *qstring;
     657             :         A_Const    *snamenode;
     658             :         TypeCast   *castnode;
     659             :         FuncCall   *funccallnode;
     660             :         Constraint *constraint;
     661             : 
     662         834 :         generateSerialExtraStmts(cxt, column,
     663         834 :                                  column->typeName->typeOid, NIL,
     664             :                                  false, false,
     665             :                                  &snamespace, &sname);
     666             : 
     667             :         /*
     668             :          * Create appropriate constraints for SERIAL.  We do this in full,
     669             :          * rather than shortcutting, so that we will detect any conflicting
     670             :          * constraints the user wrote (like a different DEFAULT).
     671             :          *
     672             :          * Create an expression tree representing the function call
     673             :          * nextval('sequencename').  We cannot reduce the raw tree to cooked
     674             :          * form until after the sequence is created, but there's no need to do
     675             :          * so.
     676             :          */
     677         834 :         qstring = quote_qualified_identifier(snamespace, sname);
     678         834 :         snamenode = makeNode(A_Const);
     679         834 :         snamenode->val.node.type = T_String;
     680         834 :         snamenode->val.sval.sval = qstring;
     681         834 :         snamenode->location = -1;
     682         834 :         castnode = makeNode(TypeCast);
     683         834 :         castnode->typeName = SystemTypeName("regclass");
     684         834 :         castnode->arg = (Node *) snamenode;
     685         834 :         castnode->location = -1;
     686         834 :         funccallnode = makeFuncCall(SystemFuncName("nextval"),
     687         834 :                                     list_make1(castnode),
     688             :                                     COERCE_EXPLICIT_CALL,
     689             :                                     -1);
     690         834 :         constraint = makeNode(Constraint);
     691         834 :         constraint->contype = CONSTR_DEFAULT;
     692         834 :         constraint->location = -1;
     693         834 :         constraint->raw_expr = (Node *) funccallnode;
     694         834 :         constraint->cooked_expr = NULL;
     695         834 :         column->constraints = lappend(column->constraints, constraint);
     696             : 
     697             :         /* have a not-null constraint added later */
     698         834 :         need_notnull = true;
     699         834 :         disallow_noinherit_notnull = true;
     700             :     }
     701             : 
     702             :     /* Process column constraints, if any... */
     703       66148 :     transformConstraintAttrs(cxt, column->constraints);
     704             : 
     705             :     /*
     706             :      * First, scan the column's constraints to see if a not-null constraint
     707             :      * that we add must be prevented from being NO INHERIT.  This should be
     708             :      * enforced only for PRIMARY KEY, not IDENTITY or SERIAL.  However, if the
     709             :      * not-null constraint is specified as a table constraint rather than as a
     710             :      * column constraint, AddRelationNotNullConstraints would raise an error
     711             :      * if a NO INHERIT mismatch is found.  To avoid inconsistently disallowing
     712             :      * it in the table constraint case but not the column constraint case, we
     713             :      * disallow it here as well.  Maybe AddRelationNotNullConstraints can be
     714             :      * improved someday, so that it doesn't complain, and then we can remove
     715             :      * the restriction for SERIAL and IDENTITY here as well.
     716             :      */
     717       66130 :     if (!disallow_noinherit_notnull)
     718             :     {
     719      147532 :         foreach_node(Constraint, constraint, column->constraints)
     720             :         {
     721       16940 :             switch (constraint->contype)
     722             :             {
     723        5556 :                 case CONSTR_IDENTITY:
     724             :                 case CONSTR_PRIMARY:
     725        5556 :                     disallow_noinherit_notnull = true;
     726        5556 :                     break;
     727       11384 :                 default:
     728       11384 :                     break;
     729             :             }
     730             :         }
     731             :     }
     732             : 
     733             :     /* Now scan them again to do full processing */
     734       66130 :     saw_nullable = false;
     735       66130 :     saw_default = false;
     736       66130 :     saw_identity = false;
     737       66130 :     saw_generated = false;
     738             : 
     739      150252 :     foreach_node(Constraint, constraint, column->constraints)
     740             :     {
     741       18316 :         switch (constraint->contype)
     742             :         {
     743          24 :             case CONSTR_NULL:
     744          24 :                 if ((saw_nullable && column->is_not_null) || need_notnull)
     745           6 :                     ereport(ERROR,
     746             :                             (errcode(ERRCODE_SYNTAX_ERROR),
     747             :                              errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
     748             :                                     column->colname, cxt->relation->relname),
     749             :                              parser_errposition(cxt->pstate,
     750             :                                                 constraint->location)));
     751          18 :                 column->is_not_null = false;
     752          18 :                 saw_nullable = true;
     753          18 :                 break;
     754             : 
     755        6336 :             case CONSTR_NOTNULL:
     756        6336 :                 if (cxt->ispartitioned && constraint->is_no_inherit)
     757           6 :                     ereport(ERROR,
     758             :                             errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
     759             :                             errmsg("not-null constraints on partitioned tables cannot be NO INHERIT"));
     760             : 
     761             :                 /* Disallow conflicting [NOT] NULL markings */
     762        6330 :                 if (saw_nullable && !column->is_not_null)
     763           0 :                     ereport(ERROR,
     764             :                             (errcode(ERRCODE_SYNTAX_ERROR),
     765             :                              errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
     766             :                                     column->colname, cxt->relation->relname),
     767             :                              parser_errposition(cxt->pstate,
     768             :                                                 constraint->location)));
     769             : 
     770        6330 :                 if (disallow_noinherit_notnull && constraint->is_no_inherit)
     771          30 :                     ereport(ERROR,
     772             :                             errcode(ERRCODE_SYNTAX_ERROR),
     773             :                             errmsg("conflicting NO INHERIT declarations for not-null constraints on column \"%s\"",
     774             :                                    column->colname));
     775             : 
     776             :                 /*
     777             :                  * If this is the first time we see this column being marked
     778             :                  * not-null, add the constraint entry and keep track of it.
     779             :                  * Also, remove previous markings that we need one.
     780             :                  *
     781             :                  * If this is a redundant not-null specification, just check
     782             :                  * that it doesn't conflict with what was specified earlier.
     783             :                  *
     784             :                  * Any conflicts with table constraints will be further
     785             :                  * checked in AddRelationNotNullConstraints().
     786             :                  */
     787        6300 :                 if (!column->is_not_null)
     788             :                 {
     789        6276 :                     column->is_not_null = true;
     790        6276 :                     saw_nullable = true;
     791        6276 :                     need_notnull = false;
     792             : 
     793        6276 :                     constraint->keys = list_make1(makeString(column->colname));
     794        6276 :                     notnull_constraint = constraint;
     795        6276 :                     cxt->nnconstraints = lappend(cxt->nnconstraints, constraint);
     796             :                 }
     797          24 :                 else if (notnull_constraint)
     798             :                 {
     799          24 :                     if (constraint->conname &&
     800          18 :                         notnull_constraint->conname &&
     801          12 :                         strcmp(notnull_constraint->conname, constraint->conname) != 0)
     802           6 :                         elog(ERROR, "conflicting not-null constraint names \"%s\" and \"%s\"",
     803             :                              notnull_constraint->conname, constraint->conname);
     804             : 
     805          18 :                     if (notnull_constraint->is_no_inherit != constraint->is_no_inherit)
     806           0 :                         ereport(ERROR,
     807             :                                 errcode(ERRCODE_SYNTAX_ERROR),
     808             :                                 errmsg("conflicting NO INHERIT declarations for not-null constraints on column \"%s\"",
     809             :                                        column->colname));
     810             : 
     811          18 :                     if (!notnull_constraint->conname && constraint->conname)
     812           6 :                         notnull_constraint->conname = constraint->conname;
     813             :                 }
     814             : 
     815        6294 :                 break;
     816             : 
     817        2424 :             case CONSTR_DEFAULT:
     818        2424 :                 if (saw_default)
     819           0 :                     ereport(ERROR,
     820             :                             (errcode(ERRCODE_SYNTAX_ERROR),
     821             :                              errmsg("multiple default values specified for column \"%s\" of table \"%s\"",
     822             :                                     column->colname, cxt->relation->relname),
     823             :                              parser_errposition(cxt->pstate,
     824             :                                                 constraint->location)));
     825        2424 :                 column->raw_default = constraint->raw_expr;
     826             :                 Assert(constraint->cooked_expr == NULL);
     827        2424 :                 saw_default = true;
     828        2424 :                 break;
     829             : 
     830         326 :             case CONSTR_IDENTITY:
     831             :                 {
     832             :                     Type        ctype;
     833             :                     Oid         typeOid;
     834             : 
     835         326 :                     if (cxt->ofType)
     836           6 :                         ereport(ERROR,
     837             :                                 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
     838             :                                  errmsg("identity columns are not supported on typed tables")));
     839         320 :                     if (cxt->partbound)
     840          24 :                         ereport(ERROR,
     841             :                                 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
     842             :                                  errmsg("identity columns are not supported on partitions")));
     843             : 
     844         296 :                     ctype = typenameType(cxt->pstate, column->typeName, NULL);
     845         296 :                     typeOid = ((Form_pg_type) GETSTRUCT(ctype))->oid;
     846         296 :                     ReleaseSysCache(ctype);
     847             : 
     848         296 :                     if (saw_identity)
     849           6 :                         ereport(ERROR,
     850             :                                 (errcode(ERRCODE_SYNTAX_ERROR),
     851             :                                  errmsg("multiple identity specifications for column \"%s\" of table \"%s\"",
     852             :                                         column->colname, cxt->relation->relname),
     853             :                                  parser_errposition(cxt->pstate,
     854             :                                                     constraint->location)));
     855             : 
     856         290 :                     generateSerialExtraStmts(cxt, column,
     857             :                                              typeOid, constraint->options,
     858             :                                              true, false,
     859             :                                              NULL, NULL);
     860             : 
     861         290 :                     column->identity = constraint->generated_when;
     862         290 :                     saw_identity = true;
     863             : 
     864             :                     /*
     865             :                      * Identity columns are always NOT NULL, but we may have a
     866             :                      * constraint already.
     867             :                      */
     868         290 :                     if (!saw_nullable)
     869         266 :                         need_notnull = true;
     870          24 :                     else if (!column->is_not_null)
     871           6 :                         ereport(ERROR,
     872             :                                 (errcode(ERRCODE_SYNTAX_ERROR),
     873             :                                  errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
     874             :                                         column->colname, cxt->relation->relname),
     875             :                                  parser_errposition(cxt->pstate,
     876             :                                                     constraint->location)));
     877         284 :                     break;
     878             :                 }
     879             : 
     880        1662 :             case CONSTR_GENERATED:
     881        1662 :                 if (cxt->ofType)
     882          12 :                     ereport(ERROR,
     883             :                             (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
     884             :                              errmsg("generated columns are not supported on typed tables")));
     885        1650 :                 if (saw_generated)
     886          12 :                     ereport(ERROR,
     887             :                             (errcode(ERRCODE_SYNTAX_ERROR),
     888             :                              errmsg("multiple generation clauses specified for column \"%s\" of table \"%s\"",
     889             :                                     column->colname, cxt->relation->relname),
     890             :                              parser_errposition(cxt->pstate,
     891             :                                                 constraint->location)));
     892        1638 :                 column->generated = constraint->generated_kind;
     893        1638 :                 column->raw_default = constraint->raw_expr;
     894             :                 Assert(constraint->cooked_expr == NULL);
     895        1638 :                 saw_generated = true;
     896        1638 :                 break;
     897             : 
     898         494 :             case CONSTR_CHECK:
     899         494 :                 cxt->ckconstraints = lappend(cxt->ckconstraints, constraint);
     900         494 :                 break;
     901             : 
     902        5660 :             case CONSTR_PRIMARY:
     903        5660 :                 if (saw_nullable && !column->is_not_null)
     904           0 :                     ereport(ERROR,
     905             :                             (errcode(ERRCODE_SYNTAX_ERROR),
     906             :                              errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
     907             :                                     column->colname, cxt->relation->relname),
     908             :                              parser_errposition(cxt->pstate,
     909             :                                                 constraint->location)));
     910        5660 :                 need_notnull = true;
     911             : 
     912        5660 :                 if (cxt->isforeign)
     913           6 :                     ereport(ERROR,
     914             :                             (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
     915             :                              errmsg("primary key constraints are not supported on foreign tables"),
     916             :                              parser_errposition(cxt->pstate,
     917             :                                                 constraint->location)));
     918             :                 /* FALL THRU */
     919             : 
     920             :             case CONSTR_UNIQUE:
     921        6004 :                 if (cxt->isforeign)
     922           0 :                     ereport(ERROR,
     923             :                             (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
     924             :                              errmsg("unique constraints are not supported on foreign tables"),
     925             :                              parser_errposition(cxt->pstate,
     926             :                                                 constraint->location)));
     927        6004 :                 if (constraint->keys == NIL)
     928        6004 :                     constraint->keys = list_make1(makeString(column->colname));
     929        6004 :                 cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
     930        6004 :                 break;
     931             : 
     932           0 :             case CONSTR_EXCLUSION:
     933             :                 /* grammar does not allow EXCLUDE as a column constraint */
     934           0 :                 elog(ERROR, "column exclusion constraints are not supported");
     935             :                 break;
     936             : 
     937         810 :             case CONSTR_FOREIGN:
     938         810 :                 if (cxt->isforeign)
     939           6 :                     ereport(ERROR,
     940             :                             (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
     941             :                              errmsg("foreign key constraints are not supported on foreign tables"),
     942             :                              parser_errposition(cxt->pstate,
     943             :                                                 constraint->location)));
     944             : 
     945             :                 /*
     946             :                  * Fill in the current attribute's name and throw it into the
     947             :                  * list of FK constraints to be processed later.
     948             :                  */
     949         804 :                 constraint->fk_attrs = list_make1(makeString(column->colname));
     950         804 :                 cxt->fkconstraints = lappend(cxt->fkconstraints, constraint);
     951         804 :                 break;
     952             : 
     953         230 :             case CONSTR_ATTR_DEFERRABLE:
     954             :             case CONSTR_ATTR_NOT_DEFERRABLE:
     955             :             case CONSTR_ATTR_DEFERRED:
     956             :             case CONSTR_ATTR_IMMEDIATE:
     957             :             case CONSTR_ATTR_ENFORCED:
     958             :             case CONSTR_ATTR_NOT_ENFORCED:
     959             :                 /* transformConstraintAttrs took care of these */
     960         230 :                 break;
     961             : 
     962           0 :             default:
     963           0 :                 elog(ERROR, "unrecognized constraint type: %d",
     964             :                      constraint->contype);
     965             :                 break;
     966             :         }
     967             : 
     968       18190 :         if (saw_default && saw_identity)
     969          12 :             ereport(ERROR,
     970             :                     (errcode(ERRCODE_SYNTAX_ERROR),
     971             :                      errmsg("both default and identity specified for column \"%s\" of table \"%s\"",
     972             :                             column->colname, cxt->relation->relname),
     973             :                      parser_errposition(cxt->pstate,
     974             :                                         constraint->location)));
     975             : 
     976       18178 :         if (saw_default && saw_generated)
     977          12 :             ereport(ERROR,
     978             :                     (errcode(ERRCODE_SYNTAX_ERROR),
     979             :                      errmsg("both default and generation expression specified for column \"%s\" of table \"%s\"",
     980             :                             column->colname, cxt->relation->relname),
     981             :                      parser_errposition(cxt->pstate,
     982             :                                         constraint->location)));
     983             : 
     984       18166 :         if (saw_identity && saw_generated)
     985          12 :             ereport(ERROR,
     986             :                     (errcode(ERRCODE_SYNTAX_ERROR),
     987             :                      errmsg("both identity and generation expression specified for column \"%s\" of table \"%s\"",
     988             :                             column->colname, cxt->relation->relname),
     989             :                      parser_errposition(cxt->pstate,
     990             :                                         constraint->location)));
     991             :     }
     992             : 
     993             :     /*
     994             :      * If we need a not-null constraint for PRIMARY KEY, SERIAL or IDENTITY,
     995             :      * and one was not explicitly specified, add one now.
     996             :      */
     997       65968 :     if (need_notnull && !(saw_nullable && column->is_not_null))
     998             :     {
     999        5084 :         column->is_not_null = true;
    1000        5084 :         notnull_constraint = makeNotNullConstraint(makeString(column->colname));
    1001        5084 :         cxt->nnconstraints = lappend(cxt->nnconstraints, notnull_constraint);
    1002             :     }
    1003             : 
    1004             :     /*
    1005             :      * If needed, generate ALTER FOREIGN TABLE ALTER COLUMN statement to add
    1006             :      * per-column foreign data wrapper options to this column after creation.
    1007             :      */
    1008       65968 :     if (column->fdwoptions != NIL)
    1009             :     {
    1010             :         AlterTableStmt *stmt;
    1011             :         AlterTableCmd *cmd;
    1012             : 
    1013         160 :         cmd = makeNode(AlterTableCmd);
    1014         160 :         cmd->subtype = AT_AlterColumnGenericOptions;
    1015         160 :         cmd->name = column->colname;
    1016         160 :         cmd->def = (Node *) column->fdwoptions;
    1017         160 :         cmd->behavior = DROP_RESTRICT;
    1018         160 :         cmd->missing_ok = false;
    1019             : 
    1020         160 :         stmt = makeNode(AlterTableStmt);
    1021         160 :         stmt->relation = cxt->relation;
    1022         160 :         stmt->cmds = NIL;
    1023         160 :         stmt->objtype = OBJECT_FOREIGN_TABLE;
    1024         160 :         stmt->cmds = lappend(stmt->cmds, cmd);
    1025             : 
    1026         160 :         cxt->alist = lappend(cxt->alist, stmt);
    1027             :     }
    1028       65968 : }
    1029             : 
    1030             : /*
    1031             :  * transformTableConstraint
    1032             :  *      transform a Constraint node within CREATE TABLE or ALTER TABLE
    1033             :  */
    1034             : static void
    1035       18368 : transformTableConstraint(CreateStmtContext *cxt, Constraint *constraint)
    1036             : {
    1037       18368 :     switch (constraint->contype)
    1038             :     {
    1039        7468 :         case CONSTR_PRIMARY:
    1040        7468 :             if (cxt->isforeign)
    1041           6 :                 ereport(ERROR,
    1042             :                         (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1043             :                          errmsg("primary key constraints are not supported on foreign tables"),
    1044             :                          parser_errposition(cxt->pstate,
    1045             :                                             constraint->location)));
    1046        7462 :             cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
    1047        7462 :             break;
    1048             : 
    1049        4774 :         case CONSTR_UNIQUE:
    1050        4774 :             if (cxt->isforeign)
    1051           6 :                 ereport(ERROR,
    1052             :                         (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1053             :                          errmsg("unique constraints are not supported on foreign tables"),
    1054             :                          parser_errposition(cxt->pstate,
    1055             :                                             constraint->location)));
    1056        4768 :             cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
    1057        4768 :             break;
    1058             : 
    1059         234 :         case CONSTR_EXCLUSION:
    1060         234 :             if (cxt->isforeign)
    1061           0 :                 ereport(ERROR,
    1062             :                         (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1063             :                          errmsg("exclusion constraints are not supported on foreign tables"),
    1064             :                          parser_errposition(cxt->pstate,
    1065             :                                             constraint->location)));
    1066         234 :             cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
    1067         234 :             break;
    1068             : 
    1069        1320 :         case CONSTR_CHECK:
    1070        1320 :             cxt->ckconstraints = lappend(cxt->ckconstraints, constraint);
    1071        1320 :             break;
    1072             : 
    1073        1384 :         case CONSTR_NOTNULL:
    1074        1384 :             if (cxt->ispartitioned && constraint->is_no_inherit)
    1075           6 :                 ereport(ERROR,
    1076             :                         errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1077             :                         errmsg("not-null constraints on partitioned tables cannot be NO INHERIT"));
    1078             : 
    1079        1378 :             cxt->nnconstraints = lappend(cxt->nnconstraints, constraint);
    1080        1378 :             break;
    1081             : 
    1082        3188 :         case CONSTR_FOREIGN:
    1083        3188 :             if (cxt->isforeign)
    1084           0 :                 ereport(ERROR,
    1085             :                         (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1086             :                          errmsg("foreign key constraints are not supported on foreign tables"),
    1087             :                          parser_errposition(cxt->pstate,
    1088             :                                             constraint->location)));
    1089        3188 :             cxt->fkconstraints = lappend(cxt->fkconstraints, constraint);
    1090        3188 :             break;
    1091             : 
    1092           0 :         case CONSTR_NULL:
    1093             :         case CONSTR_DEFAULT:
    1094             :         case CONSTR_ATTR_DEFERRABLE:
    1095             :         case CONSTR_ATTR_NOT_DEFERRABLE:
    1096             :         case CONSTR_ATTR_DEFERRED:
    1097             :         case CONSTR_ATTR_IMMEDIATE:
    1098             :         case CONSTR_ATTR_ENFORCED:
    1099             :         case CONSTR_ATTR_NOT_ENFORCED:
    1100           0 :             elog(ERROR, "invalid context for constraint type %d",
    1101             :                  constraint->contype);
    1102             :             break;
    1103             : 
    1104           0 :         default:
    1105           0 :             elog(ERROR, "unrecognized constraint type: %d",
    1106             :                  constraint->contype);
    1107             :             break;
    1108             :     }
    1109       18350 : }
    1110             : 
    1111             : /*
    1112             :  * transformTableLikeClause
    1113             :  *
    1114             :  * Change the LIKE <srctable> portion of a CREATE TABLE statement into
    1115             :  * column definitions that recreate the user defined column portions of
    1116             :  * <srctable>.  Also, if there are any LIKE options that we can't fully
    1117             :  * process at this point, add the TableLikeClause to cxt->likeclauses, which
    1118             :  * will cause utility.c to call expandTableLikeClause() after the new
    1119             :  * table has been created.
    1120             :  *
    1121             :  * Some options are ignored.  For example, as foreign tables have no storage,
    1122             :  * these INCLUDING options have no effect: STORAGE, COMPRESSION, IDENTITY
    1123             :  * and INDEXES.  Similarly, INCLUDING INDEXES is ignored from a view.
    1124             :  */
    1125             : static void
    1126         768 : transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_clause)
    1127             : {
    1128             :     AttrNumber  parent_attno;
    1129             :     Relation    relation;
    1130             :     TupleDesc   tupleDesc;
    1131             :     AclResult   aclresult;
    1132             :     char       *comment;
    1133             :     ParseCallbackState pcbstate;
    1134             : 
    1135         768 :     setup_parser_errposition_callback(&pcbstate, cxt->pstate,
    1136         768 :                                       table_like_clause->relation->location);
    1137             : 
    1138             :     /* Open the relation referenced by the LIKE clause */
    1139         768 :     relation = relation_openrv(table_like_clause->relation, AccessShareLock);
    1140             : 
    1141         762 :     if (relation->rd_rel->relkind != RELKIND_RELATION &&
    1142         386 :         relation->rd_rel->relkind != RELKIND_VIEW &&
    1143         374 :         relation->rd_rel->relkind != RELKIND_MATVIEW &&
    1144         374 :         relation->rd_rel->relkind != RELKIND_COMPOSITE_TYPE &&
    1145         368 :         relation->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
    1146         368 :         relation->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
    1147           6 :         ereport(ERROR,
    1148             :                 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    1149             :                  errmsg("relation \"%s\" is invalid in LIKE clause",
    1150             :                         RelationGetRelationName(relation)),
    1151             :                  errdetail_relkind_not_supported(relation->rd_rel->relkind)));
    1152             : 
    1153         756 :     cancel_parser_errposition_callback(&pcbstate);
    1154             : 
    1155             :     /*
    1156             :      * Check for privileges
    1157             :      */
    1158         756 :     if (relation->rd_rel->relkind == RELKIND_COMPOSITE_TYPE)
    1159             :     {
    1160           6 :         aclresult = object_aclcheck(TypeRelationId, relation->rd_rel->reltype, GetUserId(),
    1161             :                                     ACL_USAGE);
    1162           6 :         if (aclresult != ACLCHECK_OK)
    1163           0 :             aclcheck_error(aclresult, OBJECT_TYPE,
    1164           0 :                            RelationGetRelationName(relation));
    1165             :     }
    1166             :     else
    1167             :     {
    1168         750 :         aclresult = pg_class_aclcheck(RelationGetRelid(relation), GetUserId(),
    1169             :                                       ACL_SELECT);
    1170         750 :         if (aclresult != ACLCHECK_OK)
    1171           0 :             aclcheck_error(aclresult, get_relkind_objtype(relation->rd_rel->relkind),
    1172           0 :                            RelationGetRelationName(relation));
    1173             :     }
    1174             : 
    1175         756 :     tupleDesc = RelationGetDescr(relation);
    1176             : 
    1177             :     /*
    1178             :      * Insert the copied attributes into the cxt for the new table definition.
    1179             :      * We must do this now so that they appear in the table in the relative
    1180             :      * position where the LIKE clause is, as required by SQL99.
    1181             :      */
    1182        2426 :     for (parent_attno = 1; parent_attno <= tupleDesc->natts;
    1183        1670 :          parent_attno++)
    1184             :     {
    1185        1670 :         Form_pg_attribute attribute = TupleDescAttr(tupleDesc,
    1186             :                                                     parent_attno - 1);
    1187             :         ColumnDef  *def;
    1188             : 
    1189             :         /*
    1190             :          * Ignore dropped columns in the parent.
    1191             :          */
    1192        1670 :         if (attribute->attisdropped)
    1193          24 :             continue;
    1194             : 
    1195             :         /*
    1196             :          * Create a new column definition
    1197             :          */
    1198        1646 :         def = makeColumnDef(NameStr(attribute->attname), attribute->atttypid,
    1199             :                             attribute->atttypmod, attribute->attcollation);
    1200             : 
    1201             :         /*
    1202             :          * Add to column list
    1203             :          */
    1204        1646 :         cxt->columns = lappend(cxt->columns, def);
    1205             : 
    1206             :         /*
    1207             :          * Although we don't transfer the column's default/generation
    1208             :          * expression now, we need to mark it GENERATED if appropriate.
    1209             :          */
    1210        1646 :         if (attribute->atthasdef && attribute->attgenerated &&
    1211          78 :             (table_like_clause->options & CREATE_TABLE_LIKE_GENERATED))
    1212          48 :             def->generated = attribute->attgenerated;
    1213             : 
    1214             :         /*
    1215             :          * Copy identity if requested
    1216             :          */
    1217        1646 :         if (attribute->attidentity &&
    1218          30 :             (table_like_clause->options & CREATE_TABLE_LIKE_IDENTITY) &&
    1219          18 :             !cxt->isforeign)
    1220             :         {
    1221             :             Oid         seq_relid;
    1222             :             List       *seq_options;
    1223             : 
    1224             :             /*
    1225             :              * find sequence owned by old column; extract sequence parameters;
    1226             :              * build new create sequence command
    1227             :              */
    1228          12 :             seq_relid = getIdentitySequence(relation, attribute->attnum, false);
    1229          12 :             seq_options = sequence_options(seq_relid);
    1230          12 :             generateSerialExtraStmts(cxt, def,
    1231             :                                      InvalidOid, seq_options,
    1232             :                                      true, false,
    1233             :                                      NULL, NULL);
    1234          12 :             def->identity = attribute->attidentity;
    1235             :         }
    1236             : 
    1237             :         /* Likewise, copy storage if requested */
    1238        1646 :         if ((table_like_clause->options & CREATE_TABLE_LIKE_STORAGE) &&
    1239         198 :             !cxt->isforeign)
    1240         168 :             def->storage = attribute->attstorage;
    1241             :         else
    1242        1478 :             def->storage = 0;
    1243             : 
    1244             :         /* Likewise, copy compression if requested */
    1245        1646 :         if ((table_like_clause->options & CREATE_TABLE_LIKE_COMPRESSION) != 0 &&
    1246         150 :             CompressionMethodIsValid(attribute->attcompression) &&
    1247          12 :             !cxt->isforeign)
    1248           6 :             def->compression =
    1249           6 :                 pstrdup(GetCompressionMethodName(attribute->attcompression));
    1250             :         else
    1251        1640 :             def->compression = NULL;
    1252             : 
    1253             :         /* Likewise, copy comment if requested */
    1254        1832 :         if ((table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS) &&
    1255         186 :             (comment = GetComment(attribute->attrelid,
    1256             :                                   RelationRelationId,
    1257         186 :                                   attribute->attnum)) != NULL)
    1258             :         {
    1259          84 :             CommentStmt *stmt = makeNode(CommentStmt);
    1260             : 
    1261          84 :             stmt->objtype = OBJECT_COLUMN;
    1262          84 :             stmt->object = (Node *) list_make3(makeString(cxt->relation->schemaname),
    1263             :                                                makeString(cxt->relation->relname),
    1264             :                                                makeString(def->colname));
    1265          84 :             stmt->comment = comment;
    1266             : 
    1267          84 :             cxt->alist = lappend(cxt->alist, stmt);
    1268             :         }
    1269             :     }
    1270             : 
    1271             :     /*
    1272             :      * Reproduce not-null constraints, if any, by copying them.  We do this
    1273             :      * regardless of options given.
    1274             :      */
    1275         756 :     if (tupleDesc->constr && tupleDesc->constr->has_not_null)
    1276             :     {
    1277             :         List       *lst;
    1278             : 
    1279         308 :         lst = RelationGetNotNullConstraints(RelationGetRelid(relation), false,
    1280             :                                             true);
    1281         308 :         cxt->nnconstraints = list_concat(cxt->nnconstraints, lst);
    1282             :     }
    1283             : 
    1284             :     /*
    1285             :      * We cannot yet deal with defaults, CHECK constraints, indexes, or
    1286             :      * statistics, since we don't yet know what column numbers the copied
    1287             :      * columns will have in the finished table.  If any of those options are
    1288             :      * specified, add the LIKE clause to cxt->likeclauses so that
    1289             :      * expandTableLikeClause will be called after we do know that.
    1290             :      *
    1291             :      * In order for this to work, we remember the relation OID so that
    1292             :      * expandTableLikeClause is certain to open the same table.
    1293             :      */
    1294         756 :     if (table_like_clause->options &
    1295             :         (CREATE_TABLE_LIKE_DEFAULTS |
    1296             :          CREATE_TABLE_LIKE_GENERATED |
    1297             :          CREATE_TABLE_LIKE_CONSTRAINTS |
    1298             :          CREATE_TABLE_LIKE_INDEXES |
    1299             :          CREATE_TABLE_LIKE_STATISTICS))
    1300             :     {
    1301         194 :         table_like_clause->relationOid = RelationGetRelid(relation);
    1302         194 :         cxt->likeclauses = lappend(cxt->likeclauses, table_like_clause);
    1303             :     }
    1304             : 
    1305             :     /*
    1306             :      * Close the parent rel, but keep our AccessShareLock on it until xact
    1307             :      * commit.  That will prevent someone else from deleting or ALTERing the
    1308             :      * parent before we can run expandTableLikeClause.
    1309             :      */
    1310         756 :     table_close(relation, NoLock);
    1311         756 : }
    1312             : 
    1313             : /*
    1314             :  * expandTableLikeClause
    1315             :  *
    1316             :  * Process LIKE options that require knowing the final column numbers
    1317             :  * assigned to the new table's columns.  This executes after we have
    1318             :  * run DefineRelation for the new table.  It returns a list of utility
    1319             :  * commands that should be run to generate indexes etc.
    1320             :  */
    1321             : List *
    1322         194 : expandTableLikeClause(RangeVar *heapRel, TableLikeClause *table_like_clause)
    1323             : {
    1324         194 :     List       *result = NIL;
    1325         194 :     List       *atsubcmds = NIL;
    1326             :     AttrNumber  parent_attno;
    1327             :     Relation    relation;
    1328             :     Relation    childrel;
    1329             :     TupleDesc   tupleDesc;
    1330             :     TupleConstr *constr;
    1331             :     AttrMap    *attmap;
    1332             :     char       *comment;
    1333             : 
    1334             :     /*
    1335             :      * Open the relation referenced by the LIKE clause.  We should still have
    1336             :      * the table lock obtained by transformTableLikeClause (and this'll throw
    1337             :      * an assertion failure if not).  Hence, no need to recheck privileges
    1338             :      * etc.  We must open the rel by OID not name, to be sure we get the same
    1339             :      * table.
    1340             :      */
    1341         194 :     if (!OidIsValid(table_like_clause->relationOid))
    1342           0 :         elog(ERROR, "expandTableLikeClause called on untransformed LIKE clause");
    1343             : 
    1344         194 :     relation = relation_open(table_like_clause->relationOid, NoLock);
    1345             : 
    1346         194 :     tupleDesc = RelationGetDescr(relation);
    1347         194 :     constr = tupleDesc->constr;
    1348             : 
    1349             :     /*
    1350             :      * Open the newly-created child relation; we have lock on that too.
    1351             :      */
    1352         194 :     childrel = relation_openrv(heapRel, NoLock);
    1353             : 
    1354             :     /*
    1355             :      * Construct a map from the LIKE relation's attnos to the child rel's.
    1356             :      * This re-checks type match etc, although it shouldn't be possible to
    1357             :      * have a failure since both tables are locked.
    1358             :      */
    1359         194 :     attmap = build_attrmap_by_name(RelationGetDescr(childrel),
    1360             :                                    tupleDesc,
    1361             :                                    false);
    1362             : 
    1363             :     /*
    1364             :      * Process defaults, if required.
    1365             :      */
    1366         194 :     if ((table_like_clause->options &
    1367         104 :          (CREATE_TABLE_LIKE_DEFAULTS | CREATE_TABLE_LIKE_GENERATED)) &&
    1368             :         constr != NULL)
    1369             :     {
    1370         350 :         for (parent_attno = 1; parent_attno <= tupleDesc->natts;
    1371         258 :              parent_attno++)
    1372             :         {
    1373         258 :             Form_pg_attribute attribute = TupleDescAttr(tupleDesc,
    1374             :                                                         parent_attno - 1);
    1375             : 
    1376             :             /*
    1377             :              * Ignore dropped columns in the parent.
    1378             :              */
    1379         258 :             if (attribute->attisdropped)
    1380          12 :                 continue;
    1381             : 
    1382             :             /*
    1383             :              * Copy default, if present and it should be copied.  We have
    1384             :              * separate options for plain default expressions and GENERATED
    1385             :              * defaults.
    1386             :              */
    1387         338 :             if (attribute->atthasdef &&
    1388          92 :                 (attribute->attgenerated ?
    1389          54 :                  (table_like_clause->options & CREATE_TABLE_LIKE_GENERATED) :
    1390          38 :                  (table_like_clause->options & CREATE_TABLE_LIKE_DEFAULTS)))
    1391             :             {
    1392             :                 Node       *this_default;
    1393             :                 AlterTableCmd *atsubcmd;
    1394             :                 bool        found_whole_row;
    1395             : 
    1396          80 :                 this_default = TupleDescGetDefault(tupleDesc, parent_attno);
    1397          80 :                 if (this_default == NULL)
    1398           0 :                     elog(ERROR, "default expression not found for attribute %d of relation \"%s\"",
    1399             :                          parent_attno, RelationGetRelationName(relation));
    1400             : 
    1401          80 :                 atsubcmd = makeNode(AlterTableCmd);
    1402          80 :                 atsubcmd->subtype = AT_CookedColumnDefault;
    1403          80 :                 atsubcmd->num = attmap->attnums[parent_attno - 1];
    1404          80 :                 atsubcmd->def = map_variable_attnos(this_default,
    1405             :                                                     1, 0,
    1406             :                                                     attmap,
    1407             :                                                     InvalidOid,
    1408             :                                                     &found_whole_row);
    1409             : 
    1410             :                 /*
    1411             :                  * Prevent this for the same reason as for constraints below.
    1412             :                  * Note that defaults cannot contain any vars, so it's OK that
    1413             :                  * the error message refers to generated columns.
    1414             :                  */
    1415          80 :                 if (found_whole_row)
    1416           0 :                     ereport(ERROR,
    1417             :                             (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1418             :                              errmsg("cannot convert whole-row table reference"),
    1419             :                              errdetail("Generation expression for column \"%s\" contains a whole-row reference to table \"%s\".",
    1420             :                                        NameStr(attribute->attname),
    1421             :                                        RelationGetRelationName(relation))));
    1422             : 
    1423          80 :                 atsubcmds = lappend(atsubcmds, atsubcmd);
    1424             :             }
    1425             :         }
    1426             :     }
    1427             : 
    1428             :     /*
    1429             :      * Copy CHECK constraints if requested, being careful to adjust attribute
    1430             :      * numbers so they match the child.
    1431             :      */
    1432         194 :     if ((table_like_clause->options & CREATE_TABLE_LIKE_CONSTRAINTS) &&
    1433             :         constr != NULL)
    1434             :     {
    1435             :         int         ccnum;
    1436             : 
    1437         228 :         for (ccnum = 0; ccnum < constr->num_check; ccnum++)
    1438             :         {
    1439         126 :             char       *ccname = constr->check[ccnum].ccname;
    1440         126 :             char       *ccbin = constr->check[ccnum].ccbin;
    1441         126 :             bool        ccenforced = constr->check[ccnum].ccenforced;
    1442         126 :             bool        ccvalid = constr->check[ccnum].ccvalid;
    1443         126 :             bool        ccnoinherit = constr->check[ccnum].ccnoinherit;
    1444             :             Node       *ccbin_node;
    1445             :             bool        found_whole_row;
    1446             :             Constraint *n;
    1447             :             AlterTableCmd *atsubcmd;
    1448             : 
    1449         126 :             ccbin_node = map_variable_attnos(stringToNode(ccbin),
    1450             :                                              1, 0,
    1451             :                                              attmap,
    1452             :                                              InvalidOid, &found_whole_row);
    1453             : 
    1454             :             /*
    1455             :              * We reject whole-row variables because the whole point of LIKE
    1456             :              * is that the new table's rowtype might later diverge from the
    1457             :              * parent's.  So, while translation might be possible right now,
    1458             :              * it wouldn't be possible to guarantee it would work in future.
    1459             :              */
    1460         126 :             if (found_whole_row)
    1461           0 :                 ereport(ERROR,
    1462             :                         (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1463             :                          errmsg("cannot convert whole-row table reference"),
    1464             :                          errdetail("Constraint \"%s\" contains a whole-row reference to table \"%s\".",
    1465             :                                    ccname,
    1466             :                                    RelationGetRelationName(relation))));
    1467             : 
    1468         126 :             n = makeNode(Constraint);
    1469         126 :             n->contype = CONSTR_CHECK;
    1470         126 :             n->conname = pstrdup(ccname);
    1471         126 :             n->location = -1;
    1472         126 :             n->is_enforced = ccenforced;
    1473         126 :             n->initially_valid = ccvalid;
    1474         126 :             n->is_no_inherit = ccnoinherit;
    1475         126 :             n->raw_expr = NULL;
    1476         126 :             n->cooked_expr = nodeToString(ccbin_node);
    1477             : 
    1478             :             /* We can skip validation, since the new table should be empty. */
    1479         126 :             n->skip_validation = true;
    1480             : 
    1481         126 :             atsubcmd = makeNode(AlterTableCmd);
    1482         126 :             atsubcmd->subtype = AT_AddConstraint;
    1483         126 :             atsubcmd->def = (Node *) n;
    1484         126 :             atsubcmds = lappend(atsubcmds, atsubcmd);
    1485             : 
    1486             :             /* Copy comment on constraint */
    1487         210 :             if ((table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS) &&
    1488          84 :                 (comment = GetComment(get_relation_constraint_oid(RelationGetRelid(relation),
    1489          84 :                                                                   n->conname, false),
    1490             :                                       ConstraintRelationId,
    1491             :                                       0)) != NULL)
    1492             :             {
    1493          30 :                 CommentStmt *stmt = makeNode(CommentStmt);
    1494             : 
    1495          30 :                 stmt->objtype = OBJECT_TABCONSTRAINT;
    1496          30 :                 stmt->object = (Node *) list_make3(makeString(heapRel->schemaname),
    1497             :                                                    makeString(heapRel->relname),
    1498             :                                                    makeString(n->conname));
    1499          30 :                 stmt->comment = comment;
    1500             : 
    1501          30 :                 result = lappend(result, stmt);
    1502             :             }
    1503             :         }
    1504             :     }
    1505             : 
    1506             :     /*
    1507             :      * If we generated any ALTER TABLE actions above, wrap them into a single
    1508             :      * ALTER TABLE command.  Stick it at the front of the result, so it runs
    1509             :      * before any CommentStmts we made above.
    1510             :      */
    1511         194 :     if (atsubcmds)
    1512             :     {
    1513         134 :         AlterTableStmt *atcmd = makeNode(AlterTableStmt);
    1514             : 
    1515         134 :         atcmd->relation = copyObject(heapRel);
    1516         134 :         atcmd->cmds = atsubcmds;
    1517         134 :         atcmd->objtype = OBJECT_TABLE;
    1518         134 :         atcmd->missing_ok = false;
    1519         134 :         result = lcons(atcmd, result);
    1520             :     }
    1521             : 
    1522             :     /*
    1523             :      * Process indexes if required.
    1524             :      */
    1525         194 :     if ((table_like_clause->options & CREATE_TABLE_LIKE_INDEXES) &&
    1526         110 :         relation->rd_rel->relhasindex &&
    1527          86 :         childrel->rd_rel->relkind != RELKIND_FOREIGN_TABLE)
    1528             :     {
    1529             :         List       *parent_indexes;
    1530             :         ListCell   *l;
    1531             : 
    1532          80 :         parent_indexes = RelationGetIndexList(relation);
    1533             : 
    1534         210 :         foreach(l, parent_indexes)
    1535             :         {
    1536         130 :             Oid         parent_index_oid = lfirst_oid(l);
    1537             :             Relation    parent_index;
    1538             :             IndexStmt  *index_stmt;
    1539             : 
    1540         130 :             parent_index = index_open(parent_index_oid, AccessShareLock);
    1541             : 
    1542             :             /* Build CREATE INDEX statement to recreate the parent_index */
    1543         130 :             index_stmt = generateClonedIndexStmt(heapRel,
    1544             :                                                  parent_index,
    1545             :                                                  attmap,
    1546             :                                                  NULL);
    1547             : 
    1548             :             /* Copy comment on index, if requested */
    1549         130 :             if (table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS)
    1550             :             {
    1551          72 :                 comment = GetComment(parent_index_oid, RelationRelationId, 0);
    1552             : 
    1553             :                 /*
    1554             :                  * We make use of IndexStmt's idxcomment option, so as not to
    1555             :                  * need to know now what name the index will have.
    1556             :                  */
    1557          72 :                 index_stmt->idxcomment = comment;
    1558             :             }
    1559             : 
    1560         130 :             result = lappend(result, index_stmt);
    1561             : 
    1562         130 :             index_close(parent_index, AccessShareLock);
    1563             :         }
    1564             :     }
    1565             : 
    1566             :     /*
    1567             :      * Process extended statistics if required.
    1568             :      */
    1569         194 :     if (table_like_clause->options & CREATE_TABLE_LIKE_STATISTICS)
    1570             :     {
    1571             :         List       *parent_extstats;
    1572             :         ListCell   *l;
    1573             : 
    1574          60 :         parent_extstats = RelationGetStatExtList(relation);
    1575             : 
    1576         108 :         foreach(l, parent_extstats)
    1577             :         {
    1578          48 :             Oid         parent_stat_oid = lfirst_oid(l);
    1579             :             CreateStatsStmt *stats_stmt;
    1580             : 
    1581          48 :             stats_stmt = generateClonedExtStatsStmt(heapRel,
    1582             :                                                     RelationGetRelid(childrel),
    1583             :                                                     parent_stat_oid,
    1584             :                                                     attmap);
    1585             : 
    1586             :             /* Copy comment on statistics object, if requested */
    1587          48 :             if (table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS)
    1588             :             {
    1589          48 :                 comment = GetComment(parent_stat_oid, StatisticExtRelationId, 0);
    1590             : 
    1591             :                 /*
    1592             :                  * We make use of CreateStatsStmt's stxcomment option, so as
    1593             :                  * not to need to know now what name the statistics will have.
    1594             :                  */
    1595          48 :                 stats_stmt->stxcomment = comment;
    1596             :             }
    1597             : 
    1598          48 :             result = lappend(result, stats_stmt);
    1599             :         }
    1600             : 
    1601          60 :         list_free(parent_extstats);
    1602             :     }
    1603             : 
    1604             :     /* Done with child rel */
    1605         194 :     table_close(childrel, NoLock);
    1606             : 
    1607             :     /*
    1608             :      * Close the parent rel, but keep our AccessShareLock on it until xact
    1609             :      * commit.  That will prevent someone else from deleting or ALTERing the
    1610             :      * parent before the child is committed.
    1611             :      */
    1612         194 :     table_close(relation, NoLock);
    1613             : 
    1614         194 :     return result;
    1615             : }
    1616             : 
    1617             : static void
    1618         122 : transformOfType(CreateStmtContext *cxt, TypeName *ofTypename)
    1619             : {
    1620             :     HeapTuple   tuple;
    1621             :     TupleDesc   tupdesc;
    1622             :     int         i;
    1623             :     Oid         ofTypeId;
    1624             : 
    1625             :     Assert(ofTypename);
    1626             : 
    1627         122 :     tuple = typenameType(cxt->pstate, ofTypename, NULL);
    1628         116 :     check_of_type(tuple);
    1629         104 :     ofTypeId = ((Form_pg_type) GETSTRUCT(tuple))->oid;
    1630         104 :     ofTypename->typeOid = ofTypeId; /* cached for later */
    1631             : 
    1632         104 :     tupdesc = lookup_rowtype_tupdesc(ofTypeId, -1);
    1633         312 :     for (i = 0; i < tupdesc->natts; i++)
    1634             :     {
    1635         208 :         Form_pg_attribute attr = TupleDescAttr(tupdesc, i);
    1636             :         ColumnDef  *n;
    1637             : 
    1638         208 :         if (attr->attisdropped)
    1639           0 :             continue;
    1640             : 
    1641         208 :         n = makeColumnDef(NameStr(attr->attname), attr->atttypid,
    1642             :                           attr->atttypmod, attr->attcollation);
    1643         208 :         n->is_from_type = true;
    1644             : 
    1645         208 :         cxt->columns = lappend(cxt->columns, n);
    1646             :     }
    1647         104 :     ReleaseTupleDesc(tupdesc);
    1648             : 
    1649         104 :     ReleaseSysCache(tuple);
    1650         104 : }
    1651             : 
    1652             : /*
    1653             :  * Generate an IndexStmt node using information from an already existing index
    1654             :  * "source_idx".
    1655             :  *
    1656             :  * heapRel is stored into the IndexStmt's relation field, but we don't use it
    1657             :  * otherwise; some callers pass NULL, if they don't need it to be valid.
    1658             :  * (The target relation might not exist yet, so we mustn't try to access it.)
    1659             :  *
    1660             :  * Attribute numbers in expression Vars are adjusted according to attmap.
    1661             :  *
    1662             :  * If constraintOid isn't NULL, we store the OID of any constraint associated
    1663             :  * with the index there.
    1664             :  *
    1665             :  * Unlike transformIndexConstraint, we don't make any effort to force primary
    1666             :  * key columns to be not-null.  The larger cloning process this is part of
    1667             :  * should have cloned their not-null status separately (and DefineIndex will
    1668             :  * complain if that fails to happen).
    1669             :  */
    1670             : IndexStmt *
    1671        2568 : generateClonedIndexStmt(RangeVar *heapRel, Relation source_idx,
    1672             :                         const AttrMap *attmap,
    1673             :                         Oid *constraintOid)
    1674             : {
    1675        2568 :     Oid         source_relid = RelationGetRelid(source_idx);
    1676             :     HeapTuple   ht_idxrel;
    1677             :     HeapTuple   ht_idx;
    1678             :     HeapTuple   ht_am;
    1679             :     Form_pg_class idxrelrec;
    1680             :     Form_pg_index idxrec;
    1681             :     Form_pg_am  amrec;
    1682             :     oidvector  *indcollation;
    1683             :     oidvector  *indclass;
    1684             :     IndexStmt  *index;
    1685             :     List       *indexprs;
    1686             :     ListCell   *indexpr_item;
    1687             :     Oid         indrelid;
    1688             :     int         keyno;
    1689             :     Oid         keycoltype;
    1690             :     Datum       datum;
    1691             :     bool        isnull;
    1692             : 
    1693        2568 :     if (constraintOid)
    1694        1604 :         *constraintOid = InvalidOid;
    1695             : 
    1696             :     /*
    1697             :      * Fetch pg_class tuple of source index.  We can't use the copy in the
    1698             :      * relcache entry because it doesn't include optional fields.
    1699             :      */
    1700        2568 :     ht_idxrel = SearchSysCache1(RELOID, ObjectIdGetDatum(source_relid));
    1701        2568 :     if (!HeapTupleIsValid(ht_idxrel))
    1702           0 :         elog(ERROR, "cache lookup failed for relation %u", source_relid);
    1703        2568 :     idxrelrec = (Form_pg_class) GETSTRUCT(ht_idxrel);
    1704             : 
    1705             :     /* Fetch pg_index tuple for source index from relcache entry */
    1706        2568 :     ht_idx = source_idx->rd_indextuple;
    1707        2568 :     idxrec = (Form_pg_index) GETSTRUCT(ht_idx);
    1708        2568 :     indrelid = idxrec->indrelid;
    1709             : 
    1710             :     /* Fetch the pg_am tuple of the index' access method */
    1711        2568 :     ht_am = SearchSysCache1(AMOID, ObjectIdGetDatum(idxrelrec->relam));
    1712        2568 :     if (!HeapTupleIsValid(ht_am))
    1713           0 :         elog(ERROR, "cache lookup failed for access method %u",
    1714             :              idxrelrec->relam);
    1715        2568 :     amrec = (Form_pg_am) GETSTRUCT(ht_am);
    1716             : 
    1717             :     /* Extract indcollation from the pg_index tuple */
    1718        2568 :     datum = SysCacheGetAttrNotNull(INDEXRELID, ht_idx,
    1719             :                                    Anum_pg_index_indcollation);
    1720        2568 :     indcollation = (oidvector *) DatumGetPointer(datum);
    1721             : 
    1722             :     /* Extract indclass from the pg_index tuple */
    1723        2568 :     datum = SysCacheGetAttrNotNull(INDEXRELID, ht_idx, Anum_pg_index_indclass);
    1724        2568 :     indclass = (oidvector *) DatumGetPointer(datum);
    1725             : 
    1726             :     /* Begin building the IndexStmt */
    1727        2568 :     index = makeNode(IndexStmt);
    1728        2568 :     index->relation = heapRel;
    1729        2568 :     index->accessMethod = pstrdup(NameStr(amrec->amname));
    1730        2568 :     if (OidIsValid(idxrelrec->reltablespace))
    1731          52 :         index->tableSpace = get_tablespace_name(idxrelrec->reltablespace);
    1732             :     else
    1733        2516 :         index->tableSpace = NULL;
    1734        2568 :     index->excludeOpNames = NIL;
    1735        2568 :     index->idxcomment = NULL;
    1736        2568 :     index->indexOid = InvalidOid;
    1737        2568 :     index->oldNumber = InvalidRelFileNumber;
    1738        2568 :     index->oldCreateSubid = InvalidSubTransactionId;
    1739        2568 :     index->oldFirstRelfilelocatorSubid = InvalidSubTransactionId;
    1740        2568 :     index->unique = idxrec->indisunique;
    1741        2568 :     index->nulls_not_distinct = idxrec->indnullsnotdistinct;
    1742        2568 :     index->primary = idxrec->indisprimary;
    1743        2568 :     index->iswithoutoverlaps = (idxrec->indisprimary || idxrec->indisunique) && idxrec->indisexclusion;
    1744        2568 :     index->transformed = true;   /* don't need transformIndexStmt */
    1745        2568 :     index->concurrent = false;
    1746        2568 :     index->if_not_exists = false;
    1747        2568 :     index->reset_default_tblspc = false;
    1748             : 
    1749             :     /*
    1750             :      * We don't try to preserve the name of the source index; instead, just
    1751             :      * let DefineIndex() choose a reasonable name.  (If we tried to preserve
    1752             :      * the name, we'd get duplicate-relation-name failures unless the source
    1753             :      * table was in a different schema.)
    1754             :      */
    1755        2568 :     index->idxname = NULL;
    1756             : 
    1757             :     /*
    1758             :      * If the index is marked PRIMARY or has an exclusion condition, it's
    1759             :      * certainly from a constraint; else, if it's not marked UNIQUE, it
    1760             :      * certainly isn't.  If it is or might be from a constraint, we have to
    1761             :      * fetch the pg_constraint record.
    1762             :      */
    1763        2568 :     if (index->primary || index->unique || idxrec->indisexclusion)
    1764        1452 :     {
    1765        1452 :         Oid         constraintId = get_index_constraint(source_relid);
    1766             : 
    1767        1452 :         if (OidIsValid(constraintId))
    1768             :         {
    1769             :             HeapTuple   ht_constr;
    1770             :             Form_pg_constraint conrec;
    1771             : 
    1772        1402 :             if (constraintOid)
    1773        1222 :                 *constraintOid = constraintId;
    1774             : 
    1775        1402 :             ht_constr = SearchSysCache1(CONSTROID,
    1776             :                                         ObjectIdGetDatum(constraintId));
    1777        1402 :             if (!HeapTupleIsValid(ht_constr))
    1778           0 :                 elog(ERROR, "cache lookup failed for constraint %u",
    1779             :                      constraintId);
    1780        1402 :             conrec = (Form_pg_constraint) GETSTRUCT(ht_constr);
    1781             : 
    1782        1402 :             index->isconstraint = true;
    1783        1402 :             index->deferrable = conrec->condeferrable;
    1784        1402 :             index->initdeferred = conrec->condeferred;
    1785             : 
    1786             :             /* If it's an exclusion constraint, we need the operator names */
    1787        1402 :             if (idxrec->indisexclusion)
    1788             :             {
    1789             :                 Datum      *elems;
    1790             :                 int         nElems;
    1791             :                 int         i;
    1792             : 
    1793             :                 Assert(conrec->contype == CONSTRAINT_EXCLUSION ||
    1794             :                        (index->iswithoutoverlaps &&
    1795             :                         (conrec->contype == CONSTRAINT_PRIMARY || conrec->contype == CONSTRAINT_UNIQUE)));
    1796             :                 /* Extract operator OIDs from the pg_constraint tuple */
    1797          84 :                 datum = SysCacheGetAttrNotNull(CONSTROID, ht_constr,
    1798             :                                                Anum_pg_constraint_conexclop);
    1799          84 :                 deconstruct_array_builtin(DatumGetArrayTypeP(datum), OIDOID, &elems, NULL, &nElems);
    1800             : 
    1801         250 :                 for (i = 0; i < nElems; i++)
    1802             :                 {
    1803         166 :                     Oid         operid = DatumGetObjectId(elems[i]);
    1804             :                     HeapTuple   opertup;
    1805             :                     Form_pg_operator operform;
    1806             :                     char       *oprname;
    1807             :                     char       *nspname;
    1808             :                     List       *namelist;
    1809             : 
    1810         166 :                     opertup = SearchSysCache1(OPEROID,
    1811             :                                               ObjectIdGetDatum(operid));
    1812         166 :                     if (!HeapTupleIsValid(opertup))
    1813           0 :                         elog(ERROR, "cache lookup failed for operator %u",
    1814             :                              operid);
    1815         166 :                     operform = (Form_pg_operator) GETSTRUCT(opertup);
    1816         166 :                     oprname = pstrdup(NameStr(operform->oprname));
    1817             :                     /* For simplicity we always schema-qualify the op name */
    1818         166 :                     nspname = get_namespace_name(operform->oprnamespace);
    1819         166 :                     namelist = list_make2(makeString(nspname),
    1820             :                                           makeString(oprname));
    1821         166 :                     index->excludeOpNames = lappend(index->excludeOpNames,
    1822             :                                                     namelist);
    1823         166 :                     ReleaseSysCache(opertup);
    1824             :                 }
    1825             :             }
    1826             : 
    1827        1402 :             ReleaseSysCache(ht_constr);
    1828             :         }
    1829             :         else
    1830          50 :             index->isconstraint = false;
    1831             :     }
    1832             :     else
    1833        1116 :         index->isconstraint = false;
    1834             : 
    1835             :     /* Get the index expressions, if any */
    1836        2568 :     datum = SysCacheGetAttr(INDEXRELID, ht_idx,
    1837             :                             Anum_pg_index_indexprs, &isnull);
    1838        2568 :     if (!isnull)
    1839             :     {
    1840             :         char       *exprsString;
    1841             : 
    1842         166 :         exprsString = TextDatumGetCString(datum);
    1843         166 :         indexprs = (List *) stringToNode(exprsString);
    1844             :     }
    1845             :     else
    1846        2402 :         indexprs = NIL;
    1847             : 
    1848             :     /* Build the list of IndexElem */
    1849        2568 :     index->indexParams = NIL;
    1850        2568 :     index->indexIncludingParams = NIL;
    1851             : 
    1852        2568 :     indexpr_item = list_head(indexprs);
    1853        5658 :     for (keyno = 0; keyno < idxrec->indnkeyatts; keyno++)
    1854             :     {
    1855             :         IndexElem  *iparam;
    1856        3090 :         AttrNumber  attnum = idxrec->indkey.values[keyno];
    1857        3090 :         Form_pg_attribute attr = TupleDescAttr(RelationGetDescr(source_idx),
    1858             :                                                keyno);
    1859        3090 :         int16       opt = source_idx->rd_indoption[keyno];
    1860             : 
    1861        3090 :         iparam = makeNode(IndexElem);
    1862             : 
    1863        3090 :         if (AttributeNumberIsValid(attnum))
    1864             :         {
    1865             :             /* Simple index column */
    1866             :             char       *attname;
    1867             : 
    1868        2924 :             attname = get_attname(indrelid, attnum, false);
    1869        2924 :             keycoltype = get_atttype(indrelid, attnum);
    1870             : 
    1871        2924 :             iparam->name = attname;
    1872        2924 :             iparam->expr = NULL;
    1873             :         }
    1874             :         else
    1875             :         {
    1876             :             /* Expressional index */
    1877             :             Node       *indexkey;
    1878             :             bool        found_whole_row;
    1879             : 
    1880         166 :             if (indexpr_item == NULL)
    1881           0 :                 elog(ERROR, "too few entries in indexprs list");
    1882         166 :             indexkey = (Node *) lfirst(indexpr_item);
    1883         166 :             indexpr_item = lnext(indexprs, indexpr_item);
    1884             : 
    1885             :             /* Adjust Vars to match new table's column numbering */
    1886         166 :             indexkey = map_variable_attnos(indexkey,
    1887             :                                            1, 0,
    1888             :                                            attmap,
    1889             :                                            InvalidOid, &found_whole_row);
    1890             : 
    1891             :             /* As in expandTableLikeClause, reject whole-row variables */
    1892         166 :             if (found_whole_row)
    1893           0 :                 ereport(ERROR,
    1894             :                         (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1895             :                          errmsg("cannot convert whole-row table reference"),
    1896             :                          errdetail("Index \"%s\" contains a whole-row table reference.",
    1897             :                                    RelationGetRelationName(source_idx))));
    1898             : 
    1899         166 :             iparam->name = NULL;
    1900         166 :             iparam->expr = indexkey;
    1901             : 
    1902         166 :             keycoltype = exprType(indexkey);
    1903             :         }
    1904             : 
    1905             :         /* Copy the original index column name */
    1906        3090 :         iparam->indexcolname = pstrdup(NameStr(attr->attname));
    1907             : 
    1908             :         /* Add the collation name, if non-default */
    1909        3090 :         iparam->collation = get_collation(indcollation->values[keyno], keycoltype);
    1910             : 
    1911             :         /* Add the operator class name, if non-default */
    1912        3090 :         iparam->opclass = get_opclass(indclass->values[keyno], keycoltype);
    1913        3090 :         iparam->opclassopts =
    1914        3090 :             untransformRelOptions(get_attoptions(source_relid, keyno + 1));
    1915             : 
    1916        3090 :         iparam->ordering = SORTBY_DEFAULT;
    1917        3090 :         iparam->nulls_ordering = SORTBY_NULLS_DEFAULT;
    1918             : 
    1919             :         /* Adjust options if necessary */
    1920        3090 :         if (source_idx->rd_indam->amcanorder)
    1921             :         {
    1922             :             /*
    1923             :              * If it supports sort ordering, copy DESC and NULLS opts. Don't
    1924             :              * set non-default settings unnecessarily, though, so as to
    1925             :              * improve the chance of recognizing equivalence to constraint
    1926             :              * indexes.
    1927             :              */
    1928        2896 :             if (opt & INDOPTION_DESC)
    1929             :             {
    1930           0 :                 iparam->ordering = SORTBY_DESC;
    1931           0 :                 if ((opt & INDOPTION_NULLS_FIRST) == 0)
    1932           0 :                     iparam->nulls_ordering = SORTBY_NULLS_LAST;
    1933             :             }
    1934             :             else
    1935             :             {
    1936        2896 :                 if (opt & INDOPTION_NULLS_FIRST)
    1937           0 :                     iparam->nulls_ordering = SORTBY_NULLS_FIRST;
    1938             :             }
    1939             :         }
    1940             : 
    1941        3090 :         index->indexParams = lappend(index->indexParams, iparam);
    1942             :     }
    1943             : 
    1944             :     /* Handle included columns separately */
    1945        2586 :     for (keyno = idxrec->indnkeyatts; keyno < idxrec->indnatts; keyno++)
    1946             :     {
    1947             :         IndexElem  *iparam;
    1948          18 :         AttrNumber  attnum = idxrec->indkey.values[keyno];
    1949          18 :         Form_pg_attribute attr = TupleDescAttr(RelationGetDescr(source_idx),
    1950             :                                                keyno);
    1951             : 
    1952          18 :         iparam = makeNode(IndexElem);
    1953             : 
    1954          18 :         if (AttributeNumberIsValid(attnum))
    1955             :         {
    1956             :             /* Simple index column */
    1957             :             char       *attname;
    1958             : 
    1959          18 :             attname = get_attname(indrelid, attnum, false);
    1960             : 
    1961          18 :             iparam->name = attname;
    1962          18 :             iparam->expr = NULL;
    1963             :         }
    1964             :         else
    1965           0 :             ereport(ERROR,
    1966             :                     (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1967             :                      errmsg("expressions are not supported in included columns")));
    1968             : 
    1969             :         /* Copy the original index column name */
    1970          18 :         iparam->indexcolname = pstrdup(NameStr(attr->attname));
    1971             : 
    1972          18 :         index->indexIncludingParams = lappend(index->indexIncludingParams, iparam);
    1973             :     }
    1974             :     /* Copy reloptions if any */
    1975        2568 :     datum = SysCacheGetAttr(RELOID, ht_idxrel,
    1976             :                             Anum_pg_class_reloptions, &isnull);
    1977        2568 :     if (!isnull)
    1978           0 :         index->options = untransformRelOptions(datum);
    1979             : 
    1980             :     /* If it's a partial index, decompile and append the predicate */
    1981        2568 :     datum = SysCacheGetAttr(INDEXRELID, ht_idx,
    1982             :                             Anum_pg_index_indpred, &isnull);
    1983        2568 :     if (!isnull)
    1984             :     {
    1985             :         char       *pred_str;
    1986             :         Node       *pred_tree;
    1987             :         bool        found_whole_row;
    1988             : 
    1989             :         /* Convert text string to node tree */
    1990          30 :         pred_str = TextDatumGetCString(datum);
    1991          30 :         pred_tree = (Node *) stringToNode(pred_str);
    1992             : 
    1993             :         /* Adjust Vars to match new table's column numbering */
    1994          30 :         pred_tree = map_variable_attnos(pred_tree,
    1995             :                                         1, 0,
    1996             :                                         attmap,
    1997             :                                         InvalidOid, &found_whole_row);
    1998             : 
    1999             :         /* As in expandTableLikeClause, reject whole-row variables */
    2000          30 :         if (found_whole_row)
    2001           0 :             ereport(ERROR,
    2002             :                     (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    2003             :                      errmsg("cannot convert whole-row table reference"),
    2004             :                      errdetail("Index \"%s\" contains a whole-row table reference.",
    2005             :                                RelationGetRelationName(source_idx))));
    2006             : 
    2007          30 :         index->whereClause = pred_tree;
    2008             :     }
    2009             : 
    2010             :     /* Clean up */
    2011        2568 :     ReleaseSysCache(ht_idxrel);
    2012        2568 :     ReleaseSysCache(ht_am);
    2013             : 
    2014        2568 :     return index;
    2015             : }
    2016             : 
    2017             : /*
    2018             :  * Generate a CreateStatsStmt node using information from an already existing
    2019             :  * extended statistic "source_statsid", for the rel identified by heapRel and
    2020             :  * heapRelid.
    2021             :  *
    2022             :  * Attribute numbers in expression Vars are adjusted according to attmap.
    2023             :  */
    2024             : static CreateStatsStmt *
    2025          48 : generateClonedExtStatsStmt(RangeVar *heapRel, Oid heapRelid,
    2026             :                            Oid source_statsid, const AttrMap *attmap)
    2027             : {
    2028             :     HeapTuple   ht_stats;
    2029             :     Form_pg_statistic_ext statsrec;
    2030             :     CreateStatsStmt *stats;
    2031          48 :     List       *stat_types = NIL;
    2032          48 :     List       *def_names = NIL;
    2033             :     bool        isnull;
    2034             :     Datum       datum;
    2035             :     ArrayType  *arr;
    2036             :     char       *enabled;
    2037             :     int         i;
    2038             : 
    2039             :     Assert(OidIsValid(heapRelid));
    2040             :     Assert(heapRel != NULL);
    2041             : 
    2042             :     /*
    2043             :      * Fetch pg_statistic_ext tuple of source statistics object.
    2044             :      */
    2045          48 :     ht_stats = SearchSysCache1(STATEXTOID, ObjectIdGetDatum(source_statsid));
    2046          48 :     if (!HeapTupleIsValid(ht_stats))
    2047           0 :         elog(ERROR, "cache lookup failed for statistics object %u", source_statsid);
    2048          48 :     statsrec = (Form_pg_statistic_ext) GETSTRUCT(ht_stats);
    2049             : 
    2050             :     /* Determine which statistics types exist */
    2051          48 :     datum = SysCacheGetAttrNotNull(STATEXTOID, ht_stats,
    2052             :                                    Anum_pg_statistic_ext_stxkind);
    2053          48 :     arr = DatumGetArrayTypeP(datum);
    2054          48 :     if (ARR_NDIM(arr) != 1 ||
    2055          48 :         ARR_HASNULL(arr) ||
    2056          48 :         ARR_ELEMTYPE(arr) != CHAROID)
    2057           0 :         elog(ERROR, "stxkind is not a 1-D char array");
    2058          48 :     enabled = (char *) ARR_DATA_PTR(arr);
    2059         144 :     for (i = 0; i < ARR_DIMS(arr)[0]; i++)
    2060             :     {
    2061          96 :         if (enabled[i] == STATS_EXT_NDISTINCT)
    2062          24 :             stat_types = lappend(stat_types, makeString("ndistinct"));
    2063          72 :         else if (enabled[i] == STATS_EXT_DEPENDENCIES)
    2064          24 :             stat_types = lappend(stat_types, makeString("dependencies"));
    2065          48 :         else if (enabled[i] == STATS_EXT_MCV)
    2066          24 :             stat_types = lappend(stat_types, makeString("mcv"));
    2067          24 :         else if (enabled[i] == STATS_EXT_EXPRESSIONS)
    2068             :             /* expression stats are not exposed to users */
    2069          24 :             continue;
    2070             :         else
    2071           0 :             elog(ERROR, "unrecognized statistics kind %c", enabled[i]);
    2072             :     }
    2073             : 
    2074             :     /* Determine which columns the statistics are on */
    2075          96 :     for (i = 0; i < statsrec->stxkeys.dim1; i++)
    2076             :     {
    2077          48 :         StatsElem  *selem = makeNode(StatsElem);
    2078          48 :         AttrNumber  attnum = statsrec->stxkeys.values[i];
    2079             : 
    2080          48 :         selem->name = get_attname(heapRelid, attnum, false);
    2081          48 :         selem->expr = NULL;
    2082             : 
    2083          48 :         def_names = lappend(def_names, selem);
    2084             :     }
    2085             : 
    2086             :     /*
    2087             :      * Now handle expressions, if there are any. The order (with respect to
    2088             :      * regular attributes) does not really matter for extended stats, so we
    2089             :      * simply append them after simple column references.
    2090             :      *
    2091             :      * XXX Some places during build/estimation treat expressions as if they
    2092             :      * are before attributes, but for the CREATE command that's entirely
    2093             :      * irrelevant.
    2094             :      */
    2095          48 :     datum = SysCacheGetAttr(STATEXTOID, ht_stats,
    2096             :                             Anum_pg_statistic_ext_stxexprs, &isnull);
    2097             : 
    2098          48 :     if (!isnull)
    2099             :     {
    2100             :         ListCell   *lc;
    2101          24 :         List       *exprs = NIL;
    2102             :         char       *exprsString;
    2103             : 
    2104          24 :         exprsString = TextDatumGetCString(datum);
    2105          24 :         exprs = (List *) stringToNode(exprsString);
    2106             : 
    2107          48 :         foreach(lc, exprs)
    2108             :         {
    2109          24 :             Node       *expr = (Node *) lfirst(lc);
    2110          24 :             StatsElem  *selem = makeNode(StatsElem);
    2111             :             bool        found_whole_row;
    2112             : 
    2113             :             /* Adjust Vars to match new table's column numbering */
    2114          24 :             expr = map_variable_attnos(expr,
    2115             :                                        1, 0,
    2116             :                                        attmap,
    2117             :                                        InvalidOid,
    2118             :                                        &found_whole_row);
    2119             : 
    2120          24 :             selem->name = NULL;
    2121          24 :             selem->expr = expr;
    2122             : 
    2123          24 :             def_names = lappend(def_names, selem);
    2124             :         }
    2125             : 
    2126          24 :         pfree(exprsString);
    2127             :     }
    2128             : 
    2129             :     /* finally, build the output node */
    2130          48 :     stats = makeNode(CreateStatsStmt);
    2131          48 :     stats->defnames = NULL;
    2132          48 :     stats->stat_types = stat_types;
    2133          48 :     stats->exprs = def_names;
    2134          48 :     stats->relations = list_make1(heapRel);
    2135          48 :     stats->stxcomment = NULL;
    2136          48 :     stats->transformed = true;   /* don't need transformStatsStmt again */
    2137          48 :     stats->if_not_exists = false;
    2138             : 
    2139             :     /* Clean up */
    2140          48 :     ReleaseSysCache(ht_stats);
    2141             : 
    2142          48 :     return stats;
    2143             : }
    2144             : 
    2145             : /*
    2146             :  * get_collation        - fetch qualified name of a collation
    2147             :  *
    2148             :  * If collation is InvalidOid or is the default for the given actual_datatype,
    2149             :  * then the return value is NIL.
    2150             :  */
    2151             : static List *
    2152        3090 : get_collation(Oid collation, Oid actual_datatype)
    2153             : {
    2154             :     List       *result;
    2155             :     HeapTuple   ht_coll;
    2156             :     Form_pg_collation coll_rec;
    2157             :     char       *nsp_name;
    2158             :     char       *coll_name;
    2159             : 
    2160        3090 :     if (!OidIsValid(collation))
    2161        2824 :         return NIL;             /* easy case */
    2162         266 :     if (collation == get_typcollation(actual_datatype))
    2163         244 :         return NIL;             /* just let it default */
    2164             : 
    2165          22 :     ht_coll = SearchSysCache1(COLLOID, ObjectIdGetDatum(collation));
    2166          22 :     if (!HeapTupleIsValid(ht_coll))
    2167           0 :         elog(ERROR, "cache lookup failed for collation %u", collation);
    2168          22 :     coll_rec = (Form_pg_collation) GETSTRUCT(ht_coll);
    2169             : 
    2170             :     /* For simplicity, we always schema-qualify the name */
    2171          22 :     nsp_name = get_namespace_name(coll_rec->collnamespace);
    2172          22 :     coll_name = pstrdup(NameStr(coll_rec->collname));
    2173          22 :     result = list_make2(makeString(nsp_name), makeString(coll_name));
    2174             : 
    2175          22 :     ReleaseSysCache(ht_coll);
    2176          22 :     return result;
    2177             : }
    2178             : 
    2179             : /*
    2180             :  * get_opclass          - fetch qualified name of an index operator class
    2181             :  *
    2182             :  * If the opclass is the default for the given actual_datatype, then
    2183             :  * the return value is NIL.
    2184             :  */
    2185             : static List *
    2186        3090 : get_opclass(Oid opclass, Oid actual_datatype)
    2187             : {
    2188        3090 :     List       *result = NIL;
    2189             :     HeapTuple   ht_opc;
    2190             :     Form_pg_opclass opc_rec;
    2191             : 
    2192        3090 :     ht_opc = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclass));
    2193        3090 :     if (!HeapTupleIsValid(ht_opc))
    2194           0 :         elog(ERROR, "cache lookup failed for opclass %u", opclass);
    2195        3090 :     opc_rec = (Form_pg_opclass) GETSTRUCT(ht_opc);
    2196             : 
    2197        3090 :     if (GetDefaultOpClass(actual_datatype, opc_rec->opcmethod) != opclass)
    2198             :     {
    2199             :         /* For simplicity, we always schema-qualify the name */
    2200          24 :         char       *nsp_name = get_namespace_name(opc_rec->opcnamespace);
    2201          24 :         char       *opc_name = pstrdup(NameStr(opc_rec->opcname));
    2202             : 
    2203          24 :         result = list_make2(makeString(nsp_name), makeString(opc_name));
    2204             :     }
    2205             : 
    2206        3090 :     ReleaseSysCache(ht_opc);
    2207        3090 :     return result;
    2208             : }
    2209             : 
    2210             : 
    2211             : /*
    2212             :  * transformIndexConstraints
    2213             :  *      Handle UNIQUE, PRIMARY KEY, EXCLUDE constraints, which create indexes.
    2214             :  *      We also merge in any index definitions arising from
    2215             :  *      LIKE ... INCLUDING INDEXES.
    2216             :  */
    2217             : static void
    2218       59400 : transformIndexConstraints(CreateStmtContext *cxt)
    2219             : {
    2220             :     IndexStmt  *index;
    2221       59400 :     List       *indexlist = NIL;
    2222       59400 :     List       *finalindexlist = NIL;
    2223             :     ListCell   *lc;
    2224             : 
    2225             :     /*
    2226             :      * Run through the constraints that need to generate an index, and do so.
    2227             :      *
    2228             :      * For PRIMARY KEY, this queues not-null constraints for each column, if
    2229             :      * needed.
    2230             :      */
    2231       77760 :     foreach(lc, cxt->ixconstraints)
    2232             :     {
    2233       18426 :         Constraint *constraint = lfirst_node(Constraint, lc);
    2234             : 
    2235             :         Assert(constraint->contype == CONSTR_PRIMARY ||
    2236             :                constraint->contype == CONSTR_UNIQUE ||
    2237             :                constraint->contype == CONSTR_EXCLUSION);
    2238             : 
    2239       18426 :         index = transformIndexConstraint(constraint, cxt);
    2240             : 
    2241       18360 :         indexlist = lappend(indexlist, index);
    2242             :     }
    2243             : 
    2244             :     /*
    2245             :      * Scan the index list and remove any redundant index specifications. This
    2246             :      * can happen if, for instance, the user writes UNIQUE PRIMARY KEY. A
    2247             :      * strict reading of SQL would suggest raising an error instead, but that
    2248             :      * strikes me as too anal-retentive. - tgl 2001-02-14
    2249             :      *
    2250             :      * XXX in ALTER TABLE case, it'd be nice to look for duplicate
    2251             :      * pre-existing indexes, too.
    2252             :      */
    2253       59334 :     if (cxt->pkey != NULL)
    2254             :     {
    2255             :         /* Make sure we keep the PKEY index in preference to others... */
    2256       13044 :         finalindexlist = list_make1(cxt->pkey);
    2257             :     }
    2258             : 
    2259       77694 :     foreach(lc, indexlist)
    2260             :     {
    2261       18360 :         bool        keep = true;
    2262             :         ListCell   *k;
    2263             : 
    2264       18360 :         index = lfirst(lc);
    2265             : 
    2266             :         /* if it's pkey, it's already in finalindexlist */
    2267       18360 :         if (index == cxt->pkey)
    2268       13044 :             continue;
    2269             : 
    2270        5502 :         foreach(k, finalindexlist)
    2271             :         {
    2272         186 :             IndexStmt  *priorindex = lfirst(k);
    2273             : 
    2274         192 :             if (equal(index->indexParams, priorindex->indexParams) &&
    2275          12 :                 equal(index->indexIncludingParams, priorindex->indexIncludingParams) &&
    2276          12 :                 equal(index->whereClause, priorindex->whereClause) &&
    2277           6 :                 equal(index->excludeOpNames, priorindex->excludeOpNames) &&
    2278           6 :                 strcmp(index->accessMethod, priorindex->accessMethod) == 0 &&
    2279           6 :                 index->nulls_not_distinct == priorindex->nulls_not_distinct &&
    2280           6 :                 index->deferrable == priorindex->deferrable &&
    2281           0 :                 index->initdeferred == priorindex->initdeferred)
    2282             :             {
    2283           0 :                 priorindex->unique |= index->unique;
    2284             : 
    2285             :                 /*
    2286             :                  * If the prior index is as yet unnamed, and this one is
    2287             :                  * named, then transfer the name to the prior index. This
    2288             :                  * ensures that if we have named and unnamed constraints,
    2289             :                  * we'll use (at least one of) the names for the index.
    2290             :                  */
    2291           0 :                 if (priorindex->idxname == NULL)
    2292           0 :                     priorindex->idxname = index->idxname;
    2293           0 :                 keep = false;
    2294           0 :                 break;
    2295             :             }
    2296             :         }
    2297             : 
    2298        5316 :         if (keep)
    2299        5316 :             finalindexlist = lappend(finalindexlist, index);
    2300             :     }
    2301             : 
    2302             :     /*
    2303             :      * Now append all the IndexStmts to cxt->alist.
    2304             :      */
    2305       59334 :     cxt->alist = list_concat(cxt->alist, finalindexlist);
    2306       59334 : }
    2307             : 
    2308             : /*
    2309             :  * transformIndexConstraint
    2310             :  *      Transform one UNIQUE, PRIMARY KEY, or EXCLUDE constraint for
    2311             :  *      transformIndexConstraints. An IndexStmt is returned.
    2312             :  *
    2313             :  * For a PRIMARY KEY constraint, we additionally create not-null constraints
    2314             :  * for columns that don't already have them.
    2315             :  */
    2316             : static IndexStmt *
    2317       18426 : transformIndexConstraint(Constraint *constraint, CreateStmtContext *cxt)
    2318             : {
    2319             :     IndexStmt  *index;
    2320             :     ListCell   *lc;
    2321             : 
    2322       18426 :     index = makeNode(IndexStmt);
    2323             : 
    2324       18426 :     index->unique = (constraint->contype != CONSTR_EXCLUSION);
    2325       18426 :     index->primary = (constraint->contype == CONSTR_PRIMARY);
    2326       18426 :     if (index->primary)
    2327             :     {
    2328       13074 :         if (cxt->pkey != NULL)
    2329           0 :             ereport(ERROR,
    2330             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
    2331             :                      errmsg("multiple primary keys for table \"%s\" are not allowed",
    2332             :                             cxt->relation->relname),
    2333             :                      parser_errposition(cxt->pstate, constraint->location)));
    2334       13074 :         cxt->pkey = index;
    2335             : 
    2336             :         /*
    2337             :          * In ALTER TABLE case, a primary index might already exist, but
    2338             :          * DefineIndex will check for it.
    2339             :          */
    2340             :     }
    2341       18426 :     index->nulls_not_distinct = constraint->nulls_not_distinct;
    2342       18426 :     index->isconstraint = true;
    2343       18426 :     index->iswithoutoverlaps = constraint->without_overlaps;
    2344       18426 :     index->deferrable = constraint->deferrable;
    2345       18426 :     index->initdeferred = constraint->initdeferred;
    2346             : 
    2347       18426 :     if (constraint->conname != NULL)
    2348        1484 :         index->idxname = pstrdup(constraint->conname);
    2349             :     else
    2350       16942 :         index->idxname = NULL;   /* DefineIndex will choose name */
    2351             : 
    2352       18426 :     index->relation = cxt->relation;
    2353       18426 :     index->accessMethod = constraint->access_method ? constraint->access_method : DEFAULT_INDEX_TYPE;
    2354       18426 :     index->options = constraint->options;
    2355       18426 :     index->tableSpace = constraint->indexspace;
    2356       18426 :     index->whereClause = constraint->where_clause;
    2357       18426 :     index->indexParams = NIL;
    2358       18426 :     index->indexIncludingParams = NIL;
    2359       18426 :     index->excludeOpNames = NIL;
    2360       18426 :     index->idxcomment = NULL;
    2361       18426 :     index->indexOid = InvalidOid;
    2362       18426 :     index->oldNumber = InvalidRelFileNumber;
    2363       18426 :     index->oldCreateSubid = InvalidSubTransactionId;
    2364       18426 :     index->oldFirstRelfilelocatorSubid = InvalidSubTransactionId;
    2365       18426 :     index->transformed = false;
    2366       18426 :     index->concurrent = false;
    2367       18426 :     index->if_not_exists = false;
    2368       18426 :     index->reset_default_tblspc = constraint->reset_default_tblspc;
    2369             : 
    2370             :     /*
    2371             :      * If it's ALTER TABLE ADD CONSTRAINT USING INDEX, look up the index and
    2372             :      * verify it's usable, then extract the implied column name list.  (We
    2373             :      * will not actually need the column name list at runtime, but we need it
    2374             :      * now to check for duplicate column entries below.)
    2375             :      */
    2376       18426 :     if (constraint->indexname != NULL)
    2377             :     {
    2378        9564 :         char       *index_name = constraint->indexname;
    2379        9564 :         Relation    heap_rel = cxt->rel;
    2380             :         Oid         index_oid;
    2381             :         Relation    index_rel;
    2382             :         Form_pg_index index_form;
    2383             :         oidvector  *indclass;
    2384             :         Datum       indclassDatum;
    2385             :         int         i;
    2386             : 
    2387             :         /* Grammar should not allow this with explicit column list */
    2388             :         Assert(constraint->keys == NIL);
    2389             : 
    2390             :         /* Grammar should only allow PRIMARY and UNIQUE constraints */
    2391             :         Assert(constraint->contype == CONSTR_PRIMARY ||
    2392             :                constraint->contype == CONSTR_UNIQUE);
    2393             : 
    2394             :         /* Must be ALTER, not CREATE, but grammar doesn't enforce that */
    2395        9564 :         if (!cxt->isalter)
    2396           0 :             ereport(ERROR,
    2397             :                     (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    2398             :                      errmsg("cannot use an existing index in CREATE TABLE"),
    2399             :                      parser_errposition(cxt->pstate, constraint->location)));
    2400             : 
    2401             :         /* Look for the index in the same schema as the table */
    2402        9564 :         index_oid = get_relname_relid(index_name, RelationGetNamespace(heap_rel));
    2403             : 
    2404        9564 :         if (!OidIsValid(index_oid))
    2405           0 :             ereport(ERROR,
    2406             :                     (errcode(ERRCODE_UNDEFINED_OBJECT),
    2407             :                      errmsg("index \"%s\" does not exist", index_name),
    2408             :                      parser_errposition(cxt->pstate, constraint->location)));
    2409             : 
    2410             :         /* Open the index (this will throw an error if it is not an index) */
    2411        9564 :         index_rel = index_open(index_oid, AccessShareLock);
    2412        9564 :         index_form = index_rel->rd_index;
    2413             : 
    2414             :         /* Check that it does not have an associated constraint already */
    2415        9564 :         if (OidIsValid(get_index_constraint(index_oid)))
    2416           0 :             ereport(ERROR,
    2417             :                     (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
    2418             :                      errmsg("index \"%s\" is already associated with a constraint",
    2419             :                             index_name),
    2420             :                      parser_errposition(cxt->pstate, constraint->location)));
    2421             : 
    2422             :         /* Perform validity checks on the index */
    2423        9564 :         if (index_form->indrelid != RelationGetRelid(heap_rel))
    2424           0 :             ereport(ERROR,
    2425             :                     (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
    2426             :                      errmsg("index \"%s\" does not belong to table \"%s\"",
    2427             :                             index_name, RelationGetRelationName(heap_rel)),
    2428             :                      parser_errposition(cxt->pstate, constraint->location)));
    2429             : 
    2430        9564 :         if (!index_form->indisvalid)
    2431           0 :             ereport(ERROR,
    2432             :                     (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
    2433             :                      errmsg("index \"%s\" is not valid", index_name),
    2434             :                      parser_errposition(cxt->pstate, constraint->location)));
    2435             : 
    2436             :         /*
    2437             :          * Today we forbid non-unique indexes, but we could permit GiST
    2438             :          * indexes whose last entry is a range type and use that to create a
    2439             :          * WITHOUT OVERLAPS constraint (i.e. a temporal constraint).
    2440             :          */
    2441        9564 :         if (!index_form->indisunique)
    2442          12 :             ereport(ERROR,
    2443             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    2444             :                      errmsg("\"%s\" is not a unique index", index_name),
    2445             :                      errdetail("Cannot create a primary key or unique constraint using such an index."),
    2446             :                      parser_errposition(cxt->pstate, constraint->location)));
    2447             : 
    2448        9552 :         if (RelationGetIndexExpressions(index_rel) != NIL)
    2449           0 :             ereport(ERROR,
    2450             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    2451             :                      errmsg("index \"%s\" contains expressions", index_name),
    2452             :                      errdetail("Cannot create a primary key or unique constraint using such an index."),
    2453             :                      parser_errposition(cxt->pstate, constraint->location)));
    2454             : 
    2455        9552 :         if (RelationGetIndexPredicate(index_rel) != NIL)
    2456           0 :             ereport(ERROR,
    2457             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    2458             :                      errmsg("\"%s\" is a partial index", index_name),
    2459             :                      errdetail("Cannot create a primary key or unique constraint using such an index."),
    2460             :                      parser_errposition(cxt->pstate, constraint->location)));
    2461             : 
    2462             :         /*
    2463             :          * It's probably unsafe to change a deferred index to non-deferred. (A
    2464             :          * non-constraint index couldn't be deferred anyway, so this case
    2465             :          * should never occur; no need to sweat, but let's check it.)
    2466             :          */
    2467        9552 :         if (!index_form->indimmediate && !constraint->deferrable)
    2468           0 :             ereport(ERROR,
    2469             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    2470             :                      errmsg("\"%s\" is a deferrable index", index_name),
    2471             :                      errdetail("Cannot create a non-deferrable constraint using a deferrable index."),
    2472             :                      parser_errposition(cxt->pstate, constraint->location)));
    2473             : 
    2474             :         /*
    2475             :          * Insist on it being a btree.  We must have an index that exactly
    2476             :          * matches what you'd get from plain ADD CONSTRAINT syntax, else dump
    2477             :          * and reload will produce a different index (breaking pg_upgrade in
    2478             :          * particular).
    2479             :          */
    2480        9552 :         if (index_rel->rd_rel->relam != get_index_am_oid(DEFAULT_INDEX_TYPE, false))
    2481           0 :             ereport(ERROR,
    2482             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    2483             :                      errmsg("index \"%s\" is not a btree", index_name),
    2484             :                      parser_errposition(cxt->pstate, constraint->location)));
    2485             : 
    2486             :         /* Must get indclass the hard way */
    2487        9552 :         indclassDatum = SysCacheGetAttrNotNull(INDEXRELID,
    2488        9552 :                                                index_rel->rd_indextuple,
    2489             :                                                Anum_pg_index_indclass);
    2490        9552 :         indclass = (oidvector *) DatumGetPointer(indclassDatum);
    2491             : 
    2492       25264 :         for (i = 0; i < index_form->indnatts; i++)
    2493             :         {
    2494       15724 :             int16       attnum = index_form->indkey.values[i];
    2495             :             const FormData_pg_attribute *attform;
    2496             :             char       *attname;
    2497             :             Oid         defopclass;
    2498             : 
    2499             :             /*
    2500             :              * We shouldn't see attnum == 0 here, since we already rejected
    2501             :              * expression indexes.  If we do, SystemAttributeDefinition will
    2502             :              * throw an error.
    2503             :              */
    2504       15724 :             if (attnum > 0)
    2505             :             {
    2506             :                 Assert(attnum <= heap_rel->rd_att->natts);
    2507       15724 :                 attform = TupleDescAttr(heap_rel->rd_att, attnum - 1);
    2508             :             }
    2509             :             else
    2510           0 :                 attform = SystemAttributeDefinition(attnum);
    2511       15724 :             attname = pstrdup(NameStr(attform->attname));
    2512             : 
    2513       15724 :             if (i < index_form->indnkeyatts)
    2514             :             {
    2515             :                 /*
    2516             :                  * Insist on default opclass, collation, and sort options.
    2517             :                  * While the index would still work as a constraint with
    2518             :                  * non-default settings, it might not provide exactly the same
    2519             :                  * uniqueness semantics as you'd get from a normally-created
    2520             :                  * constraint; and there's also the dump/reload problem
    2521             :                  * mentioned above.
    2522             :                  */
    2523             :                 Datum       attoptions =
    2524       15694 :                     get_attoptions(RelationGetRelid(index_rel), i + 1);
    2525             : 
    2526       15694 :                 defopclass = GetDefaultOpClass(attform->atttypid,
    2527       15694 :                                                index_rel->rd_rel->relam);
    2528       15694 :                 if (indclass->values[i] != defopclass ||
    2529       15694 :                     attform->attcollation != index_rel->rd_indcollation[i] ||
    2530       15688 :                     attoptions != (Datum) 0 ||
    2531       15688 :                     index_rel->rd_indoption[i] != 0)
    2532          12 :                     ereport(ERROR,
    2533             :                             (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    2534             :                              errmsg("index \"%s\" column number %d does not have default sorting behavior", index_name, i + 1),
    2535             :                              errdetail("Cannot create a primary key or unique constraint using such an index."),
    2536             :                              parser_errposition(cxt->pstate, constraint->location)));
    2537             : 
    2538             :                 /* If a PK, ensure the columns get not null constraints */
    2539       15682 :                 if (constraint->contype == CONSTR_PRIMARY)
    2540        7136 :                     cxt->nnconstraints =
    2541        7136 :                         lappend(cxt->nnconstraints,
    2542        7136 :                                 makeNotNullConstraint(makeString(attname)));
    2543             : 
    2544       15682 :                 constraint->keys = lappend(constraint->keys, makeString(attname));
    2545             :             }
    2546             :             else
    2547          30 :                 constraint->including = lappend(constraint->including, makeString(attname));
    2548             :         }
    2549             : 
    2550             :         /* Close the index relation but keep the lock */
    2551        9540 :         relation_close(index_rel, NoLock);
    2552             : 
    2553        9540 :         index->indexOid = index_oid;
    2554             :     }
    2555             : 
    2556             :     /*
    2557             :      * If it's an EXCLUDE constraint, the grammar returns a list of pairs of
    2558             :      * IndexElems and operator names.  We have to break that apart into
    2559             :      * separate lists.
    2560             :      */
    2561       18402 :     if (constraint->contype == CONSTR_EXCLUSION)
    2562             :     {
    2563         574 :         foreach(lc, constraint->exclusions)
    2564             :         {
    2565         340 :             List       *pair = (List *) lfirst(lc);
    2566             :             IndexElem  *elem;
    2567             :             List       *opname;
    2568             : 
    2569             :             Assert(list_length(pair) == 2);
    2570         340 :             elem = linitial_node(IndexElem, pair);
    2571         340 :             opname = lsecond_node(List, pair);
    2572             : 
    2573         340 :             index->indexParams = lappend(index->indexParams, elem);
    2574         340 :             index->excludeOpNames = lappend(index->excludeOpNames, opname);
    2575             :         }
    2576             :     }
    2577             : 
    2578             :     /*
    2579             :      * For UNIQUE and PRIMARY KEY, we just have a list of column names.
    2580             :      *
    2581             :      * Make sure referenced keys exist.  If we are making a PRIMARY KEY index,
    2582             :      * also make sure they are not-null.  For WITHOUT OVERLAPS constraints, we
    2583             :      * make sure the last part is a range or multirange.
    2584             :      */
    2585             :     else
    2586             :     {
    2587       43926 :         foreach(lc, constraint->keys)
    2588             :         {
    2589       25788 :             char       *key = strVal(lfirst(lc));
    2590       25788 :             bool        found = false;
    2591       25788 :             ColumnDef  *column = NULL;
    2592             :             ListCell   *columns;
    2593             :             IndexElem  *iparam;
    2594       25788 :             Oid         typid = InvalidOid;
    2595             : 
    2596             :             /* Make sure referenced column exists. */
    2597       27442 :             foreach(columns, cxt->columns)
    2598             :             {
    2599        9992 :                 column = lfirst_node(ColumnDef, columns);
    2600        9992 :                 if (strcmp(column->colname, key) == 0)
    2601             :                 {
    2602        8338 :                     found = true;
    2603        8338 :                     break;
    2604             :                 }
    2605             :             }
    2606       25788 :             if (!found)
    2607       17450 :                 column = NULL;
    2608             : 
    2609       25788 :             if (found)
    2610             :             {
    2611             :                 /*
    2612             :                  * column is defined in the new table.  For CREATE TABLE with
    2613             :                  * a PRIMARY KEY, we can apply the not-null constraint cheaply
    2614             :                  * here.  If the not-null constraint already exists, we can
    2615             :                  * (albeit not so cheaply) verify that it's not a NO INHERIT
    2616             :                  * constraint.
    2617             :                  *
    2618             :                  * Note that ALTER TABLE never needs either check, because
    2619             :                  * those constraints have already been added by
    2620             :                  * ATPrepAddPrimaryKey.
    2621             :                  */
    2622        8338 :                 if (constraint->contype == CONSTR_PRIMARY &&
    2623        7564 :                     !cxt->isalter)
    2624             :                 {
    2625        7540 :                     if (column->is_not_null)
    2626             :                     {
    2627       12050 :                         foreach_node(Constraint, nn, cxt->nnconstraints)
    2628             :                         {
    2629        6100 :                             if (strcmp(strVal(linitial(nn->keys)), key) == 0)
    2630             :                             {
    2631        5956 :                                 if (nn->is_no_inherit)
    2632           6 :                                     ereport(ERROR,
    2633             :                                             errcode(ERRCODE_SYNTAX_ERROR),
    2634             :                                             errmsg("conflicting NO INHERIT declaration for not-null constraint on column \"%s\"",
    2635             :                                                    key));
    2636        5950 :                                 break;
    2637             :                             }
    2638             :                         }
    2639             :                     }
    2640             :                     else
    2641             :                     {
    2642        1584 :                         column->is_not_null = true;
    2643        1584 :                         cxt->nnconstraints =
    2644        1584 :                             lappend(cxt->nnconstraints,
    2645        1584 :                                     makeNotNullConstraint(makeString(key)));
    2646             :                     }
    2647             :                 }
    2648          24 :                 else if (constraint->contype == CONSTR_PRIMARY)
    2649             :                     Assert(column->is_not_null);
    2650             :             }
    2651       17450 :             else if (SystemAttributeByName(key) != NULL)
    2652             :             {
    2653             :                 /*
    2654             :                  * column will be a system column in the new table, so accept
    2655             :                  * it. System columns can't ever be null, so no need to worry
    2656             :                  * about PRIMARY/NOT NULL constraint.
    2657             :                  */
    2658           0 :                 found = true;
    2659             :             }
    2660       17450 :             else if (cxt->inhRelations)
    2661             :             {
    2662             :                 /* try inherited tables */
    2663             :                 ListCell   *inher;
    2664             : 
    2665          96 :                 foreach(inher, cxt->inhRelations)
    2666             :                 {
    2667          96 :                     RangeVar   *inh = lfirst_node(RangeVar, inher);
    2668             :                     Relation    rel;
    2669             :                     int         count;
    2670             : 
    2671          96 :                     rel = table_openrv(inh, AccessShareLock);
    2672             :                     /* check user requested inheritance from valid relkind */
    2673          96 :                     if (rel->rd_rel->relkind != RELKIND_RELATION &&
    2674           0 :                         rel->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
    2675           0 :                         rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
    2676           0 :                         ereport(ERROR,
    2677             :                                 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    2678             :                                  errmsg("inherited relation \"%s\" is not a table or foreign table",
    2679             :                                         inh->relname)));
    2680         102 :                     for (count = 0; count < rel->rd_att->natts; count++)
    2681             :                     {
    2682         102 :                         Form_pg_attribute inhattr = TupleDescAttr(rel->rd_att,
    2683             :                                                                   count);
    2684         102 :                         char       *inhname = NameStr(inhattr->attname);
    2685             : 
    2686         102 :                         if (inhattr->attisdropped)
    2687           0 :                             continue;
    2688         102 :                         if (strcmp(key, inhname) == 0)
    2689             :                         {
    2690          96 :                             found = true;
    2691          96 :                             typid = inhattr->atttypid;
    2692             : 
    2693          96 :                             if (constraint->contype == CONSTR_PRIMARY)
    2694          84 :                                 cxt->nnconstraints =
    2695          84 :                                     lappend(cxt->nnconstraints,
    2696          84 :                                             makeNotNullConstraint(makeString(pstrdup(inhname))));
    2697          96 :                             break;
    2698             :                         }
    2699             :                     }
    2700          96 :                     table_close(rel, NoLock);
    2701          96 :                     if (found)
    2702          96 :                         break;
    2703             :                 }
    2704             :             }
    2705             : 
    2706             :             /*
    2707             :              * In the ALTER TABLE case, don't complain about index keys not
    2708             :              * created in the command; they may well exist already.
    2709             :              * DefineIndex will complain about them if not.
    2710             :              */
    2711       25782 :             if (!found && !cxt->isalter)
    2712          12 :                 ereport(ERROR,
    2713             :                         (errcode(ERRCODE_UNDEFINED_COLUMN),
    2714             :                          errmsg("column \"%s\" named in key does not exist", key),
    2715             :                          parser_errposition(cxt->pstate, constraint->location)));
    2716             : 
    2717             :             /* Check for PRIMARY KEY(foo, foo) */
    2718       35986 :             foreach(columns, index->indexParams)
    2719             :             {
    2720       10216 :                 iparam = (IndexElem *) lfirst(columns);
    2721       10216 :                 if (iparam->name && strcmp(key, iparam->name) == 0)
    2722             :                 {
    2723           0 :                     if (index->primary)
    2724           0 :                         ereport(ERROR,
    2725             :                                 (errcode(ERRCODE_DUPLICATE_COLUMN),
    2726             :                                  errmsg("column \"%s\" appears twice in primary key constraint",
    2727             :                                         key),
    2728             :                                  parser_errposition(cxt->pstate, constraint->location)));
    2729             :                     else
    2730           0 :                         ereport(ERROR,
    2731             :                                 (errcode(ERRCODE_DUPLICATE_COLUMN),
    2732             :                                  errmsg("column \"%s\" appears twice in unique constraint",
    2733             :                                         key),
    2734             :                                  parser_errposition(cxt->pstate, constraint->location)));
    2735             :                 }
    2736             :             }
    2737             : 
    2738             :             /*
    2739             :              * The WITHOUT OVERLAPS part (if any) must be a range or
    2740             :              * multirange type.
    2741             :              */
    2742       25770 :             if (constraint->without_overlaps && lc == list_last_cell(constraint->keys))
    2743             :             {
    2744         542 :                 if (!found && cxt->isalter)
    2745             :                 {
    2746             :                     /*
    2747             :                      * Look up the column type on existing table. If we can't
    2748             :                      * find it, let things fail in DefineIndex.
    2749             :                      */
    2750         166 :                     Relation    rel = cxt->rel;
    2751             : 
    2752         336 :                     for (int i = 0; i < rel->rd_att->natts; i++)
    2753             :                     {
    2754         336 :                         Form_pg_attribute attr = TupleDescAttr(rel->rd_att, i);
    2755             :                         const char *attname;
    2756             : 
    2757         336 :                         if (attr->attisdropped)
    2758           0 :                             break;
    2759             : 
    2760         336 :                         attname = NameStr(attr->attname);
    2761         336 :                         if (strcmp(attname, key) == 0)
    2762             :                         {
    2763         166 :                             found = true;
    2764         166 :                             typid = attr->atttypid;
    2765         166 :                             break;
    2766             :                         }
    2767             :                     }
    2768             :                 }
    2769         542 :                 if (found)
    2770             :                 {
    2771         542 :                     if (!OidIsValid(typid) && column)
    2772         370 :                         typid = typenameTypeId(NULL, column->typeName);
    2773             : 
    2774         542 :                     if (!OidIsValid(typid) || !(type_is_range(typid) || type_is_multirange(typid)))
    2775          12 :                         ereport(ERROR,
    2776             :                                 (errcode(ERRCODE_DATATYPE_MISMATCH),
    2777             :                                  errmsg("column \"%s\" in WITHOUT OVERLAPS is not a range or multirange type", key),
    2778             :                                  parser_errposition(cxt->pstate, constraint->location)));
    2779             :                 }
    2780             :             }
    2781             : 
    2782             :             /* OK, add it to the index definition */
    2783       25758 :             iparam = makeNode(IndexElem);
    2784       25758 :             iparam->name = pstrdup(key);
    2785       25758 :             iparam->expr = NULL;
    2786       25758 :             iparam->indexcolname = NULL;
    2787       25758 :             iparam->collation = NIL;
    2788       25758 :             iparam->opclass = NIL;
    2789       25758 :             iparam->opclassopts = NIL;
    2790       25758 :             iparam->ordering = SORTBY_DEFAULT;
    2791       25758 :             iparam->nulls_ordering = SORTBY_NULLS_DEFAULT;
    2792       25758 :             index->indexParams = lappend(index->indexParams, iparam);
    2793             :         }
    2794             : 
    2795       18138 :         if (constraint->without_overlaps)
    2796             :         {
    2797             :             /*
    2798             :              * This enforces that there is at least one equality column
    2799             :              * besides the WITHOUT OVERLAPS columns.  This is per SQL
    2800             :              * standard.  XXX Do we need this?
    2801             :              */
    2802         530 :             if (list_length(constraint->keys) < 2)
    2803          12 :                 ereport(ERROR,
    2804             :                         errcode(ERRCODE_SYNTAX_ERROR),
    2805             :                         errmsg("constraint using WITHOUT OVERLAPS needs at least two columns"));
    2806             : 
    2807             :             /* WITHOUT OVERLAPS requires a GiST index */
    2808         518 :             index->accessMethod = "gist";
    2809             :         }
    2810             : 
    2811             :     }
    2812             : 
    2813             :     /*
    2814             :      * Add included columns to index definition.  This is much like the
    2815             :      * simple-column-name-list code above, except that we don't worry about
    2816             :      * NOT NULL marking; included columns in a primary key should not be
    2817             :      * forced NOT NULL.  We don't complain about duplicate columns, either,
    2818             :      * though maybe we should?
    2819             :      */
    2820       18668 :     foreach(lc, constraint->including)
    2821             :     {
    2822         308 :         char       *key = strVal(lfirst(lc));
    2823         308 :         bool        found = false;
    2824         308 :         ColumnDef  *column = NULL;
    2825             :         ListCell   *columns;
    2826             :         IndexElem  *iparam;
    2827             : 
    2828         662 :         foreach(columns, cxt->columns)
    2829             :         {
    2830         544 :             column = lfirst_node(ColumnDef, columns);
    2831         544 :             if (strcmp(column->colname, key) == 0)
    2832             :             {
    2833         190 :                 found = true;
    2834         190 :                 break;
    2835             :             }
    2836             :         }
    2837             : 
    2838         308 :         if (!found)
    2839             :         {
    2840         118 :             if (SystemAttributeByName(key) != NULL)
    2841             :             {
    2842             :                 /*
    2843             :                  * column will be a system column in the new table, so accept
    2844             :                  * it.
    2845             :                  */
    2846           0 :                 found = true;
    2847             :             }
    2848         118 :             else if (cxt->inhRelations)
    2849             :             {
    2850             :                 /* try inherited tables */
    2851             :                 ListCell   *inher;
    2852             : 
    2853           0 :                 foreach(inher, cxt->inhRelations)
    2854             :                 {
    2855           0 :                     RangeVar   *inh = lfirst_node(RangeVar, inher);
    2856             :                     Relation    rel;
    2857             :                     int         count;
    2858             : 
    2859           0 :                     rel = table_openrv(inh, AccessShareLock);
    2860             :                     /* check user requested inheritance from valid relkind */
    2861           0 :                     if (rel->rd_rel->relkind != RELKIND_RELATION &&
    2862           0 :                         rel->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
    2863           0 :                         rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
    2864           0 :                         ereport(ERROR,
    2865             :                                 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    2866             :                                  errmsg("inherited relation \"%s\" is not a table or foreign table",
    2867             :                                         inh->relname)));
    2868           0 :                     for (count = 0; count < rel->rd_att->natts; count++)
    2869             :                     {
    2870           0 :                         Form_pg_attribute inhattr = TupleDescAttr(rel->rd_att,
    2871             :                                                                   count);
    2872           0 :                         char       *inhname = NameStr(inhattr->attname);
    2873             : 
    2874           0 :                         if (inhattr->attisdropped)
    2875           0 :                             continue;
    2876           0 :                         if (strcmp(key, inhname) == 0)
    2877             :                         {
    2878           0 :                             found = true;
    2879           0 :                             break;
    2880             :                         }
    2881             :                     }
    2882           0 :                     table_close(rel, NoLock);
    2883           0 :                     if (found)
    2884           0 :                         break;
    2885             :                 }
    2886             :             }
    2887             :         }
    2888             : 
    2889             :         /*
    2890             :          * In the ALTER TABLE case, don't complain about index keys not
    2891             :          * created in the command; they may well exist already. DefineIndex
    2892             :          * will complain about them if not.
    2893             :          */
    2894         308 :         if (!found && !cxt->isalter)
    2895           0 :             ereport(ERROR,
    2896             :                     (errcode(ERRCODE_UNDEFINED_COLUMN),
    2897             :                      errmsg("column \"%s\" named in key does not exist", key),
    2898             :                      parser_errposition(cxt->pstate, constraint->location)));
    2899             : 
    2900             :         /* OK, add it to the index definition */
    2901         308 :         iparam = makeNode(IndexElem);
    2902         308 :         iparam->name = pstrdup(key);
    2903         308 :         iparam->expr = NULL;
    2904         308 :         iparam->indexcolname = NULL;
    2905         308 :         iparam->collation = NIL;
    2906         308 :         iparam->opclass = NIL;
    2907         308 :         iparam->opclassopts = NIL;
    2908         308 :         index->indexIncludingParams = lappend(index->indexIncludingParams, iparam);
    2909             :     }
    2910             : 
    2911       18360 :     return index;
    2912             : }
    2913             : 
    2914             : /*
    2915             :  * transformCheckConstraints
    2916             :  *      handle CHECK constraints
    2917             :  *
    2918             :  * Right now, there's nothing to do here when called from ALTER TABLE,
    2919             :  * but the other constraint-transformation functions are called in both
    2920             :  * the CREATE TABLE and ALTER TABLE paths, so do the same here, and just
    2921             :  * don't do anything if we're not authorized to skip validation.
    2922             :  */
    2923             : static void
    2924       59334 : transformCheckConstraints(CreateStmtContext *cxt, bool skipValidation)
    2925             : {
    2926             :     ListCell   *ckclist;
    2927             : 
    2928       59334 :     if (cxt->ckconstraints == NIL)
    2929       57668 :         return;
    2930             : 
    2931             :     /*
    2932             :      * When creating a new table (but not a foreign table), we can safely skip
    2933             :      * the validation of check constraints and mark them as valid based on the
    2934             :      * constraint enforcement flag, since NOT ENFORCED constraints must always
    2935             :      * be marked as NOT VALID. (This will override any user-supplied NOT VALID
    2936             :      * flag.)
    2937             :      */
    2938        1666 :     if (skipValidation)
    2939             :     {
    2940        1552 :         foreach(ckclist, cxt->ckconstraints)
    2941             :         {
    2942         846 :             Constraint *constraint = (Constraint *) lfirst(ckclist);
    2943             : 
    2944         846 :             constraint->skip_validation = true;
    2945         846 :             constraint->initially_valid = constraint->is_enforced;
    2946             :         }
    2947             :     }
    2948             : }
    2949             : 
    2950             : /*
    2951             :  * transformFKConstraints
    2952             :  *      handle FOREIGN KEY constraints
    2953             :  */
    2954             : static void
    2955       59334 : transformFKConstraints(CreateStmtContext *cxt,
    2956             :                        bool skipValidation, bool isAddConstraint)
    2957             : {
    2958             :     ListCell   *fkclist;
    2959             : 
    2960       59334 :     if (cxt->fkconstraints == NIL)
    2961       55410 :         return;
    2962             : 
    2963             :     /*
    2964             :      * If CREATE TABLE or adding a column with NULL default, we can safely
    2965             :      * skip validation of FK constraints, and nonetheless mark them valid.
    2966             :      * (This will override any user-supplied NOT VALID flag.)
    2967             :      */
    2968        3924 :     if (skipValidation)
    2969             :     {
    2970        2764 :         foreach(fkclist, cxt->fkconstraints)
    2971             :         {
    2972        1416 :             Constraint *constraint = (Constraint *) lfirst(fkclist);
    2973             : 
    2974        1416 :             constraint->skip_validation = true;
    2975        1416 :             constraint->initially_valid = true;
    2976             :         }
    2977             :     }
    2978             : 
    2979             :     /*
    2980             :      * For CREATE TABLE or ALTER TABLE ADD COLUMN, gin up an ALTER TABLE ADD
    2981             :      * CONSTRAINT command to execute after the basic command is complete. (If
    2982             :      * called from ADD CONSTRAINT, that routine will add the FK constraints to
    2983             :      * its own subcommand list.)
    2984             :      *
    2985             :      * Note: the ADD CONSTRAINT command must also execute after any index
    2986             :      * creation commands.  Thus, this should run after
    2987             :      * transformIndexConstraints, so that the CREATE INDEX commands are
    2988             :      * already in cxt->alist.  See also the handling of cxt->likeclauses.
    2989             :      */
    2990        3924 :     if (!isAddConstraint)
    2991             :     {
    2992        1342 :         AlterTableStmt *alterstmt = makeNode(AlterTableStmt);
    2993             : 
    2994        1342 :         alterstmt->relation = cxt->relation;
    2995        1342 :         alterstmt->cmds = NIL;
    2996        1342 :         alterstmt->objtype = OBJECT_TABLE;
    2997             : 
    2998        2752 :         foreach(fkclist, cxt->fkconstraints)
    2999             :         {
    3000        1410 :             Constraint *constraint = (Constraint *) lfirst(fkclist);
    3001        1410 :             AlterTableCmd *altercmd = makeNode(AlterTableCmd);
    3002             : 
    3003        1410 :             altercmd->subtype = AT_AddConstraint;
    3004        1410 :             altercmd->name = NULL;
    3005        1410 :             altercmd->def = (Node *) constraint;
    3006        1410 :             alterstmt->cmds = lappend(alterstmt->cmds, altercmd);
    3007             :         }
    3008             : 
    3009        1342 :         cxt->alist = lappend(cxt->alist, alterstmt);
    3010             :     }
    3011             : }
    3012             : 
    3013             : /*
    3014             :  * transformIndexStmt - parse analysis for CREATE INDEX and ALTER TABLE
    3015             :  *
    3016             :  * Note: this is a no-op for an index not using either index expressions or
    3017             :  * a predicate expression.  There are several code paths that create indexes
    3018             :  * without bothering to call this, because they know they don't have any
    3019             :  * such expressions to deal with.
    3020             :  *
    3021             :  * To avoid race conditions, it's important that this function rely only on
    3022             :  * the passed-in relid (and not on stmt->relation) to determine the target
    3023             :  * relation.
    3024             :  */
    3025             : IndexStmt *
    3026       24922 : transformIndexStmt(Oid relid, IndexStmt *stmt, const char *queryString)
    3027             : {
    3028             :     ParseState *pstate;
    3029             :     ParseNamespaceItem *nsitem;
    3030             :     ListCell   *l;
    3031             :     Relation    rel;
    3032             : 
    3033             :     /* Nothing to do if statement already transformed. */
    3034       24922 :     if (stmt->transformed)
    3035         130 :         return stmt;
    3036             : 
    3037             :     /* Set up pstate */
    3038       24792 :     pstate = make_parsestate(NULL);
    3039       24792 :     pstate->p_sourcetext = queryString;
    3040             : 
    3041             :     /*
    3042             :      * Put the parent table into the rtable so that the expressions can refer
    3043             :      * to its fields without qualification.  Caller is responsible for locking
    3044             :      * relation, but we still need to open it.
    3045             :      */
    3046       24792 :     rel = relation_open(relid, NoLock);
    3047       24792 :     nsitem = addRangeTableEntryForRelation(pstate, rel,
    3048             :                                            AccessShareLock,
    3049             :                                            NULL, false, true);
    3050             : 
    3051             :     /* no to join list, yes to namespaces */
    3052       24792 :     addNSItemToQuery(pstate, nsitem, false, true, true);
    3053             : 
    3054             :     /* take care of the where clause */
    3055       24792 :     if (stmt->whereClause)
    3056             :     {
    3057         392 :         stmt->whereClause = transformWhereClause(pstate,
    3058             :                                                  stmt->whereClause,
    3059             :                                                  EXPR_KIND_INDEX_PREDICATE,
    3060             :                                                  "WHERE");
    3061             :         /* we have to fix its collations too */
    3062         392 :         assign_expr_collations(pstate, stmt->whereClause);
    3063             :     }
    3064             : 
    3065             :     /* take care of any index expressions */
    3066       58968 :     foreach(l, stmt->indexParams)
    3067             :     {
    3068       34188 :         IndexElem  *ielem = (IndexElem *) lfirst(l);
    3069             : 
    3070       34188 :         if (ielem->expr)
    3071             :         {
    3072             :             /* Extract preliminary index col name before transforming expr */
    3073         916 :             if (ielem->indexcolname == NULL)
    3074         916 :                 ielem->indexcolname = FigureIndexColname(ielem->expr);
    3075             : 
    3076             :             /* Now do parse transformation of the expression */
    3077         916 :             ielem->expr = transformExpr(pstate, ielem->expr,
    3078             :                                         EXPR_KIND_INDEX_EXPRESSION);
    3079             : 
    3080             :             /* We have to fix its collations too */
    3081         904 :             assign_expr_collations(pstate, ielem->expr);
    3082             : 
    3083             :             /*
    3084             :              * transformExpr() should have already rejected subqueries,
    3085             :              * aggregates, window functions, and SRFs, based on the EXPR_KIND_
    3086             :              * for an index expression.
    3087             :              *
    3088             :              * DefineIndex() will make more checks.
    3089             :              */
    3090             :         }
    3091             :     }
    3092             : 
    3093             :     /*
    3094             :      * Check that only the base rel is mentioned.  (This should be dead code
    3095             :      * now that add_missing_from is history.)
    3096             :      */
    3097       24780 :     if (list_length(pstate->p_rtable) != 1)
    3098           0 :         ereport(ERROR,
    3099             :                 (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
    3100             :                  errmsg("index expressions and predicates can refer only to the table being indexed")));
    3101             : 
    3102       24780 :     free_parsestate(pstate);
    3103             : 
    3104             :     /* Close relation */
    3105       24780 :     table_close(rel, NoLock);
    3106             : 
    3107             :     /* Mark statement as successfully transformed */
    3108       24780 :     stmt->transformed = true;
    3109             : 
    3110       24780 :     return stmt;
    3111             : }
    3112             : 
    3113             : /*
    3114             :  * transformStatsStmt - parse analysis for CREATE STATISTICS
    3115             :  *
    3116             :  * To avoid race conditions, it's important that this function relies only on
    3117             :  * the passed-in relid (and not on stmt->relation) to determine the target
    3118             :  * relation.
    3119             :  */
    3120             : CreateStatsStmt *
    3121         706 : transformStatsStmt(Oid relid, CreateStatsStmt *stmt, const char *queryString)
    3122             : {
    3123             :     ParseState *pstate;
    3124             :     ParseNamespaceItem *nsitem;
    3125             :     ListCell   *l;
    3126             :     Relation    rel;
    3127             : 
    3128             :     /* Nothing to do if statement already transformed. */
    3129         706 :     if (stmt->transformed)
    3130          48 :         return stmt;
    3131             : 
    3132             :     /* Set up pstate */
    3133         658 :     pstate = make_parsestate(NULL);
    3134         658 :     pstate->p_sourcetext = queryString;
    3135             : 
    3136             :     /*
    3137             :      * Put the parent table into the rtable so that the expressions can refer
    3138             :      * to its fields without qualification.  Caller is responsible for locking
    3139             :      * relation, but we still need to open it.
    3140             :      */
    3141         658 :     rel = relation_open(relid, NoLock);
    3142         658 :     nsitem = addRangeTableEntryForRelation(pstate, rel,
    3143             :                                            AccessShareLock,
    3144             :                                            NULL, false, true);
    3145             : 
    3146             :     /* no to join list, yes to namespaces */
    3147         658 :     addNSItemToQuery(pstate, nsitem, false, true, true);
    3148             : 
    3149             :     /* take care of any expressions */
    3150        2276 :     foreach(l, stmt->exprs)
    3151             :     {
    3152        1618 :         StatsElem  *selem = (StatsElem *) lfirst(l);
    3153             : 
    3154        1618 :         if (selem->expr)
    3155             :         {
    3156             :             /* Now do parse transformation of the expression */
    3157         474 :             selem->expr = transformExpr(pstate, selem->expr,
    3158             :                                         EXPR_KIND_STATS_EXPRESSION);
    3159             : 
    3160             :             /* We have to fix its collations too */
    3161         474 :             assign_expr_collations(pstate, selem->expr);
    3162             :         }
    3163             :     }
    3164             : 
    3165             :     /*
    3166             :      * Check that only the base rel is mentioned.  (This should be dead code
    3167             :      * now that add_missing_from is history.)
    3168             :      */
    3169         658 :     if (list_length(pstate->p_rtable) != 1)
    3170           0 :         ereport(ERROR,
    3171             :                 (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
    3172             :                  errmsg("statistics expressions can refer only to the table being referenced")));
    3173             : 
    3174         658 :     free_parsestate(pstate);
    3175             : 
    3176             :     /* Close relation */
    3177         658 :     table_close(rel, NoLock);
    3178             : 
    3179             :     /* Mark statement as successfully transformed */
    3180         658 :     stmt->transformed = true;
    3181             : 
    3182         658 :     return stmt;
    3183             : }
    3184             : 
    3185             : 
    3186             : /*
    3187             :  * transformRuleStmt -
    3188             :  *    transform a CREATE RULE Statement. The action is a list of parse
    3189             :  *    trees which is transformed into a list of query trees, and we also
    3190             :  *    transform the WHERE clause if any.
    3191             :  *
    3192             :  * actions and whereClause are output parameters that receive the
    3193             :  * transformed results.
    3194             :  */
    3195             : void
    3196        1072 : transformRuleStmt(RuleStmt *stmt, const char *queryString,
    3197             :                   List **actions, Node **whereClause)
    3198             : {
    3199             :     Relation    rel;
    3200             :     ParseState *pstate;
    3201             :     ParseNamespaceItem *oldnsitem;
    3202             :     ParseNamespaceItem *newnsitem;
    3203             : 
    3204             :     /*
    3205             :      * To avoid deadlock, make sure the first thing we do is grab
    3206             :      * AccessExclusiveLock on the target relation.  This will be needed by
    3207             :      * DefineQueryRewrite(), and we don't want to grab a lesser lock
    3208             :      * beforehand.
    3209             :      */
    3210        1072 :     rel = table_openrv(stmt->relation, AccessExclusiveLock);
    3211             : 
    3212        1072 :     if (rel->rd_rel->relkind == RELKIND_MATVIEW)
    3213           0 :         ereport(ERROR,
    3214             :                 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    3215             :                  errmsg("rules on materialized views are not supported")));
    3216             : 
    3217             :     /* Set up pstate */
    3218        1072 :     pstate = make_parsestate(NULL);
    3219        1072 :     pstate->p_sourcetext = queryString;
    3220             : 
    3221             :     /*
    3222             :      * NOTE: 'OLD' must always have a varno equal to 1 and 'NEW' equal to 2.
    3223             :      * Set up their ParseNamespaceItems in the main pstate for use in parsing
    3224             :      * the rule qualification.
    3225             :      */
    3226        1072 :     oldnsitem = addRangeTableEntryForRelation(pstate, rel,
    3227             :                                               AccessShareLock,
    3228             :                                               makeAlias("old", NIL),
    3229             :                                               false, false);
    3230        1072 :     newnsitem = addRangeTableEntryForRelation(pstate, rel,
    3231             :                                               AccessShareLock,
    3232             :                                               makeAlias("new", NIL),
    3233             :                                               false, false);
    3234             : 
    3235             :     /*
    3236             :      * They must be in the namespace too for lookup purposes, but only add the
    3237             :      * one(s) that are relevant for the current kind of rule.  In an UPDATE
    3238             :      * rule, quals must refer to OLD.field or NEW.field to be unambiguous, but
    3239             :      * there's no need to be so picky for INSERT & DELETE.  We do not add them
    3240             :      * to the joinlist.
    3241             :      */
    3242        1072 :     switch (stmt->event)
    3243             :     {
    3244          18 :         case CMD_SELECT:
    3245          18 :             addNSItemToQuery(pstate, oldnsitem, false, true, true);
    3246          18 :             break;
    3247         412 :         case CMD_UPDATE:
    3248         412 :             addNSItemToQuery(pstate, oldnsitem, false, true, true);
    3249         412 :             addNSItemToQuery(pstate, newnsitem, false, true, true);
    3250         412 :             break;
    3251         478 :         case CMD_INSERT:
    3252         478 :             addNSItemToQuery(pstate, newnsitem, false, true, true);
    3253         478 :             break;
    3254         164 :         case CMD_DELETE:
    3255         164 :             addNSItemToQuery(pstate, oldnsitem, false, true, true);
    3256         164 :             break;
    3257           0 :         default:
    3258           0 :             elog(ERROR, "unrecognized event type: %d",
    3259             :                  (int) stmt->event);
    3260             :             break;
    3261             :     }
    3262             : 
    3263             :     /* take care of the where clause */
    3264        1072 :     *whereClause = transformWhereClause(pstate,
    3265             :                                         stmt->whereClause,
    3266             :                                         EXPR_KIND_WHERE,
    3267             :                                         "WHERE");
    3268             :     /* we have to fix its collations too */
    3269        1072 :     assign_expr_collations(pstate, *whereClause);
    3270             : 
    3271             :     /* this is probably dead code without add_missing_from: */
    3272        1072 :     if (list_length(pstate->p_rtable) != 2) /* naughty, naughty... */
    3273           0 :         ereport(ERROR,
    3274             :                 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    3275             :                  errmsg("rule WHERE condition cannot contain references to other relations")));
    3276             : 
    3277             :     /*
    3278             :      * 'instead nothing' rules with a qualification need a query rangetable so
    3279             :      * the rewrite handler can add the negated rule qualification to the
    3280             :      * original query. We create a query with the new command type CMD_NOTHING
    3281             :      * here that is treated specially by the rewrite system.
    3282             :      */
    3283        1072 :     if (stmt->actions == NIL)
    3284             :     {
    3285         152 :         Query      *nothing_qry = makeNode(Query);
    3286             : 
    3287         152 :         nothing_qry->commandType = CMD_NOTHING;
    3288         152 :         nothing_qry->rtable = pstate->p_rtable;
    3289         152 :         nothing_qry->rteperminfos = pstate->p_rteperminfos;
    3290         152 :         nothing_qry->jointree = makeFromExpr(NIL, NULL); /* no join wanted */
    3291             : 
    3292         152 :         *actions = list_make1(nothing_qry);
    3293             :     }
    3294             :     else
    3295             :     {
    3296             :         ListCell   *l;
    3297         920 :         List       *newactions = NIL;
    3298             : 
    3299             :         /*
    3300             :          * transform each statement, like parse_sub_analyze()
    3301             :          */
    3302        1868 :         foreach(l, stmt->actions)
    3303             :         {
    3304         966 :             Node       *action = (Node *) lfirst(l);
    3305         966 :             ParseState *sub_pstate = make_parsestate(NULL);
    3306             :             Query      *sub_qry,
    3307             :                        *top_subqry;
    3308             :             bool        has_old,
    3309             :                         has_new;
    3310             : 
    3311             :             /*
    3312             :              * Since outer ParseState isn't parent of inner, have to pass down
    3313             :              * the query text by hand.
    3314             :              */
    3315         966 :             sub_pstate->p_sourcetext = queryString;
    3316             : 
    3317             :             /*
    3318             :              * Set up OLD/NEW in the rtable for this statement.  The entries
    3319             :              * are added only to relnamespace, not varnamespace, because we
    3320             :              * don't want them to be referred to by unqualified field names
    3321             :              * nor "*" in the rule actions.  We decide later whether to put
    3322             :              * them in the joinlist.
    3323             :              */
    3324         966 :             oldnsitem = addRangeTableEntryForRelation(sub_pstate, rel,
    3325             :                                                       AccessShareLock,
    3326             :                                                       makeAlias("old", NIL),
    3327             :                                                       false, false);
    3328         966 :             newnsitem = addRangeTableEntryForRelation(sub_pstate, rel,
    3329             :                                                       AccessShareLock,
    3330             :                                                       makeAlias("new", NIL),
    3331             :                                                       false, false);
    3332         966 :             addNSItemToQuery(sub_pstate, oldnsitem, false, true, false);
    3333         966 :             addNSItemToQuery(sub_pstate, newnsitem, false, true, false);
    3334             : 
    3335             :             /* Transform the rule action statement */
    3336         966 :             top_subqry = transformStmt(sub_pstate, action);
    3337             : 
    3338             :             /*
    3339             :              * We cannot support utility-statement actions (eg NOTIFY) with
    3340             :              * nonempty rule WHERE conditions, because there's no way to make
    3341             :              * the utility action execute conditionally.
    3342             :              */
    3343         954 :             if (top_subqry->commandType == CMD_UTILITY &&
    3344          40 :                 *whereClause != NULL)
    3345           0 :                 ereport(ERROR,
    3346             :                         (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    3347             :                          errmsg("rules with WHERE conditions can only have SELECT, INSERT, UPDATE, or DELETE actions")));
    3348             : 
    3349             :             /*
    3350             :              * If the action is INSERT...SELECT, OLD/NEW have been pushed down
    3351             :              * into the SELECT, and that's what we need to look at. (Ugly
    3352             :              * kluge ... try to fix this when we redesign querytrees.)
    3353             :              */
    3354         954 :             sub_qry = getInsertSelectQuery(top_subqry, NULL);
    3355             : 
    3356             :             /*
    3357             :              * If the sub_qry is a setop, we cannot attach any qualifications
    3358             :              * to it, because the planner won't notice them.  This could
    3359             :              * perhaps be relaxed someday, but for now, we may as well reject
    3360             :              * such a rule immediately.
    3361             :              */
    3362         954 :             if (sub_qry->setOperations != NULL && *whereClause != NULL)
    3363           0 :                 ereport(ERROR,
    3364             :                         (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    3365             :                          errmsg("conditional UNION/INTERSECT/EXCEPT statements are not implemented")));
    3366             : 
    3367             :             /*
    3368             :              * Validate action's use of OLD/NEW, qual too
    3369             :              */
    3370         954 :             has_old =
    3371        1530 :                 rangeTableEntry_used((Node *) sub_qry, PRS2_OLD_VARNO, 0) ||
    3372         576 :                 rangeTableEntry_used(*whereClause, PRS2_OLD_VARNO, 0);
    3373         954 :             has_new =
    3374        1276 :                 rangeTableEntry_used((Node *) sub_qry, PRS2_NEW_VARNO, 0) ||
    3375         322 :                 rangeTableEntry_used(*whereClause, PRS2_NEW_VARNO, 0);
    3376             : 
    3377         954 :             switch (stmt->event)
    3378             :             {
    3379          18 :                 case CMD_SELECT:
    3380          18 :                     if (has_old)
    3381           0 :                         ereport(ERROR,
    3382             :                                 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    3383             :                                  errmsg("ON SELECT rule cannot use OLD")));
    3384          18 :                     if (has_new)
    3385           0 :                         ereport(ERROR,
    3386             :                                 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    3387             :                                  errmsg("ON SELECT rule cannot use NEW")));
    3388          18 :                     break;
    3389         334 :                 case CMD_UPDATE:
    3390             :                     /* both are OK */
    3391         334 :                     break;
    3392         434 :                 case CMD_INSERT:
    3393         434 :                     if (has_old)
    3394           0 :                         ereport(ERROR,
    3395             :                                 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    3396             :                                  errmsg("ON INSERT rule cannot use OLD")));
    3397         434 :                     break;
    3398         168 :                 case CMD_DELETE:
    3399         168 :                     if (has_new)
    3400           0 :                         ereport(ERROR,
    3401             :                                 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    3402             :                                  errmsg("ON DELETE rule cannot use NEW")));
    3403         168 :                     break;
    3404           0 :                 default:
    3405           0 :                     elog(ERROR, "unrecognized event type: %d",
    3406             :                          (int) stmt->event);
    3407             :                     break;
    3408             :             }
    3409             : 
    3410             :             /*
    3411             :              * OLD/NEW are not allowed in WITH queries, because they would
    3412             :              * amount to outer references for the WITH, which we disallow.
    3413             :              * However, they were already in the outer rangetable when we
    3414             :              * analyzed the query, so we have to check.
    3415             :              *
    3416             :              * Note that in the INSERT...SELECT case, we need to examine the
    3417             :              * CTE lists of both top_subqry and sub_qry.
    3418             :              *
    3419             :              * Note that we aren't digging into the body of the query looking
    3420             :              * for WITHs in nested sub-SELECTs.  A WITH down there can
    3421             :              * legitimately refer to OLD/NEW, because it'd be an
    3422             :              * indirect-correlated outer reference.
    3423             :              */
    3424         954 :             if (rangeTableEntry_used((Node *) top_subqry->cteList,
    3425         948 :                                      PRS2_OLD_VARNO, 0) ||
    3426         948 :                 rangeTableEntry_used((Node *) sub_qry->cteList,
    3427             :                                      PRS2_OLD_VARNO, 0))
    3428           6 :                 ereport(ERROR,
    3429             :                         (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    3430             :                          errmsg("cannot refer to OLD within WITH query")));
    3431         948 :             if (rangeTableEntry_used((Node *) top_subqry->cteList,
    3432         948 :                                      PRS2_NEW_VARNO, 0) ||
    3433         948 :                 rangeTableEntry_used((Node *) sub_qry->cteList,
    3434             :                                      PRS2_NEW_VARNO, 0))
    3435           0 :                 ereport(ERROR,
    3436             :                         (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    3437             :                          errmsg("cannot refer to NEW within WITH query")));
    3438             : 
    3439             :             /*
    3440             :              * For efficiency's sake, add OLD to the rule action's jointree
    3441             :              * only if it was actually referenced in the statement or qual.
    3442             :              *
    3443             :              * For INSERT, NEW is not really a relation (only a reference to
    3444             :              * the to-be-inserted tuple) and should never be added to the
    3445             :              * jointree.
    3446             :              *
    3447             :              * For UPDATE, we treat NEW as being another kind of reference to
    3448             :              * OLD, because it represents references to *transformed* tuples
    3449             :              * of the existing relation.  It would be wrong to enter NEW
    3450             :              * separately in the jointree, since that would cause a double
    3451             :              * join of the updated relation.  It's also wrong to fail to make
    3452             :              * a jointree entry if only NEW and not OLD is mentioned.
    3453             :              */
    3454         948 :             if (has_old || (has_new && stmt->event == CMD_UPDATE))
    3455             :             {
    3456             :                 RangeTblRef *rtr;
    3457             : 
    3458             :                 /*
    3459             :                  * If sub_qry is a setop, manipulating its jointree will do no
    3460             :                  * good at all, because the jointree is dummy. (This should be
    3461             :                  * a can't-happen case because of prior tests.)
    3462             :                  */
    3463         420 :                 if (sub_qry->setOperations != NULL)
    3464           0 :                     ereport(ERROR,
    3465             :                             (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    3466             :                              errmsg("conditional UNION/INTERSECT/EXCEPT statements are not implemented")));
    3467             :                 /* hackishly add OLD to the already-built FROM clause */
    3468         420 :                 rtr = makeNode(RangeTblRef);
    3469         420 :                 rtr->rtindex = oldnsitem->p_rtindex;
    3470         420 :                 sub_qry->jointree->fromlist =
    3471         420 :                     lappend(sub_qry->jointree->fromlist, rtr);
    3472             :             }
    3473             : 
    3474         948 :             newactions = lappend(newactions, top_subqry);
    3475             : 
    3476         948 :             free_parsestate(sub_pstate);
    3477             :         }
    3478             : 
    3479         902 :         *actions = newactions;
    3480             :     }
    3481             : 
    3482        1054 :     free_parsestate(pstate);
    3483             : 
    3484             :     /* Close relation, but keep the exclusive lock */
    3485        1054 :     table_close(rel, NoLock);
    3486        1054 : }
    3487             : 
    3488             : 
    3489             : /*
    3490             :  * transformAlterTableStmt -
    3491             :  *      parse analysis for ALTER TABLE
    3492             :  *
    3493             :  * Returns the transformed AlterTableStmt.  There may be additional actions
    3494             :  * to be done before and after the transformed statement, which are returned
    3495             :  * in *beforeStmts and *afterStmts as lists of utility command parsetrees.
    3496             :  *
    3497             :  * To avoid race conditions, it's important that this function rely only on
    3498             :  * the passed-in relid (and not on stmt->relation) to determine the target
    3499             :  * relation.
    3500             :  */
    3501             : AlterTableStmt *
    3502       22480 : transformAlterTableStmt(Oid relid, AlterTableStmt *stmt,
    3503             :                         const char *queryString,
    3504             :                         List **beforeStmts, List **afterStmts)
    3505             : {
    3506             :     Relation    rel;
    3507             :     TupleDesc   tupdesc;
    3508             :     ParseState *pstate;
    3509             :     CreateStmtContext cxt;
    3510             :     List       *save_alist;
    3511             :     ListCell   *lcmd,
    3512             :                *l;
    3513       22480 :     List       *newcmds = NIL;
    3514       22480 :     bool        skipValidation = true;
    3515             :     AlterTableCmd *newcmd;
    3516             :     ParseNamespaceItem *nsitem;
    3517             : 
    3518             :     /* Caller is responsible for locking the relation */
    3519       22480 :     rel = relation_open(relid, NoLock);
    3520       22480 :     tupdesc = RelationGetDescr(rel);
    3521             : 
    3522             :     /* Set up pstate */
    3523       22480 :     pstate = make_parsestate(NULL);
    3524       22480 :     pstate->p_sourcetext = queryString;
    3525       22480 :     nsitem = addRangeTableEntryForRelation(pstate,
    3526             :                                            rel,
    3527             :                                            AccessShareLock,
    3528             :                                            NULL,
    3529             :                                            false,
    3530             :                                            true);
    3531       22480 :     addNSItemToQuery(pstate, nsitem, false, true, true);
    3532             : 
    3533             :     /* Set up CreateStmtContext */
    3534       22480 :     cxt.pstate = pstate;
    3535       22480 :     if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
    3536             :     {
    3537         180 :         cxt.stmtType = "ALTER FOREIGN TABLE";
    3538         180 :         cxt.isforeign = true;
    3539             :     }
    3540             :     else
    3541             :     {
    3542       22300 :         cxt.stmtType = "ALTER TABLE";
    3543       22300 :         cxt.isforeign = false;
    3544             :     }
    3545       22480 :     cxt.relation = stmt->relation;
    3546       22480 :     cxt.rel = rel;
    3547       22480 :     cxt.inhRelations = NIL;
    3548       22480 :     cxt.isalter = true;
    3549       22480 :     cxt.columns = NIL;
    3550       22480 :     cxt.ckconstraints = NIL;
    3551       22480 :     cxt.nnconstraints = NIL;
    3552       22480 :     cxt.fkconstraints = NIL;
    3553       22480 :     cxt.ixconstraints = NIL;
    3554       22480 :     cxt.likeclauses = NIL;
    3555       22480 :     cxt.blist = NIL;
    3556       22480 :     cxt.alist = NIL;
    3557       22480 :     cxt.pkey = NULL;
    3558       22480 :     cxt.ispartitioned = (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE);
    3559       22480 :     cxt.partbound = NULL;
    3560       22480 :     cxt.ofType = false;
    3561             : 
    3562             :     /*
    3563             :      * Transform ALTER subcommands that need it (most don't).  These largely
    3564             :      * re-use code from CREATE TABLE.
    3565             :      */
    3566       44918 :     foreach(lcmd, stmt->cmds)
    3567             :     {
    3568       22480 :         AlterTableCmd *cmd = (AlterTableCmd *) lfirst(lcmd);
    3569             : 
    3570       22480 :         switch (cmd->subtype)
    3571             :         {
    3572        2032 :             case AT_AddColumn:
    3573             :                 {
    3574        2032 :                     ColumnDef  *def = castNode(ColumnDef, cmd->def);
    3575             : 
    3576        2032 :                     transformColumnDefinition(&cxt, def);
    3577             : 
    3578             :                     /*
    3579             :                      * If the column has a non-null default, we can't skip
    3580             :                      * validation of foreign keys.
    3581             :                      */
    3582        2026 :                     if (def->raw_default != NULL)
    3583         814 :                         skipValidation = false;
    3584             : 
    3585             :                     /*
    3586             :                      * All constraints are processed in other ways. Remove the
    3587             :                      * original list
    3588             :                      */
    3589        2026 :                     def->constraints = NIL;
    3590             : 
    3591        2026 :                     newcmds = lappend(newcmds, cmd);
    3592        2026 :                     break;
    3593             :                 }
    3594             : 
    3595       15658 :             case AT_AddConstraint:
    3596             : 
    3597             :                 /*
    3598             :                  * The original AddConstraint cmd node doesn't go to newcmds
    3599             :                  */
    3600       15658 :                 if (IsA(cmd->def, Constraint))
    3601             :                 {
    3602       15658 :                     transformTableConstraint(&cxt, (Constraint *) cmd->def);
    3603       15652 :                     if (((Constraint *) cmd->def)->contype == CONSTR_FOREIGN)
    3604        2576 :                         skipValidation = false;
    3605             :                 }
    3606             :                 else
    3607           0 :                     elog(ERROR, "unrecognized node type: %d",
    3608             :                          (int) nodeTag(cmd->def));
    3609       15652 :                 break;
    3610             : 
    3611        1282 :             case AT_AlterColumnType:
    3612             :                 {
    3613        1282 :                     ColumnDef  *def = castNode(ColumnDef, cmd->def);
    3614             :                     AttrNumber  attnum;
    3615             : 
    3616             :                     /*
    3617             :                      * For ALTER COLUMN TYPE, transform the USING clause if
    3618             :                      * one was specified.
    3619             :                      */
    3620        1282 :                     if (def->raw_default)
    3621             :                     {
    3622         246 :                         def->cooked_default =
    3623         246 :                             transformExpr(pstate, def->raw_default,
    3624             :                                           EXPR_KIND_ALTER_COL_TRANSFORM);
    3625             :                     }
    3626             : 
    3627             :                     /*
    3628             :                      * For identity column, create ALTER SEQUENCE command to
    3629             :                      * change the data type of the sequence. Identity sequence
    3630             :                      * is associated with the top level partitioned table.
    3631             :                      * Hence ignore partitions.
    3632             :                      */
    3633        1282 :                     if (!RelationGetForm(rel)->relispartition)
    3634             :                     {
    3635        1180 :                         attnum = get_attnum(relid, cmd->name);
    3636        1180 :                         if (attnum == InvalidAttrNumber)
    3637           0 :                             ereport(ERROR,
    3638             :                                     (errcode(ERRCODE_UNDEFINED_COLUMN),
    3639             :                                      errmsg("column \"%s\" of relation \"%s\" does not exist",
    3640             :                                             cmd->name, RelationGetRelationName(rel))));
    3641             : 
    3642        1180 :                         if (attnum > 0 &&
    3643        1174 :                             TupleDescAttr(tupdesc, attnum - 1)->attidentity)
    3644             :                         {
    3645          36 :                             Oid         seq_relid = getIdentitySequence(rel, attnum, false);
    3646          36 :                             Oid         typeOid = typenameTypeId(pstate, def->typeName);
    3647          36 :                             AlterSeqStmt *altseqstmt = makeNode(AlterSeqStmt);
    3648             : 
    3649             :                             altseqstmt->sequence
    3650          36 :                                 = makeRangeVar(get_namespace_name(get_rel_namespace(seq_relid)),
    3651             :                                                get_rel_name(seq_relid),
    3652             :                                                -1);
    3653          36 :                             altseqstmt->options = list_make1(makeDefElem("as",
    3654             :                                                                          (Node *) makeTypeNameFromOid(typeOid, -1),
    3655             :                                                                          -1));
    3656          36 :                             altseqstmt->for_identity = true;
    3657          36 :                             cxt.blist = lappend(cxt.blist, altseqstmt);
    3658             :                         }
    3659             :                     }
    3660             : 
    3661        1282 :                     newcmds = lappend(newcmds, cmd);
    3662        1282 :                     break;
    3663             :                 }
    3664             : 
    3665         166 :             case AT_AddIdentity:
    3666             :                 {
    3667         166 :                     Constraint *def = castNode(Constraint, cmd->def);
    3668         166 :                     ColumnDef  *newdef = makeNode(ColumnDef);
    3669             :                     AttrNumber  attnum;
    3670             : 
    3671         166 :                     newdef->colname = cmd->name;
    3672         166 :                     newdef->identity = def->generated_when;
    3673         166 :                     cmd->def = (Node *) newdef;
    3674             : 
    3675         166 :                     attnum = get_attnum(relid, cmd->name);
    3676         166 :                     if (attnum == InvalidAttrNumber)
    3677           6 :                         ereport(ERROR,
    3678             :                                 (errcode(ERRCODE_UNDEFINED_COLUMN),
    3679             :                                  errmsg("column \"%s\" of relation \"%s\" does not exist",
    3680             :                                         cmd->name, RelationGetRelationName(rel))));
    3681             : 
    3682         160 :                     generateSerialExtraStmts(&cxt, newdef,
    3683             :                                              get_atttype(relid, attnum),
    3684             :                                              def->options, true, true,
    3685             :                                              NULL, NULL);
    3686             : 
    3687         160 :                     newcmds = lappend(newcmds, cmd);
    3688         160 :                     break;
    3689             :                 }
    3690             : 
    3691          62 :             case AT_SetIdentity:
    3692             :                 {
    3693             :                     /*
    3694             :                      * Create an ALTER SEQUENCE statement for the internal
    3695             :                      * sequence of the identity column.
    3696             :                      */
    3697             :                     ListCell   *lc;
    3698          62 :                     List       *newseqopts = NIL;
    3699          62 :                     List       *newdef = NIL;
    3700             :                     AttrNumber  attnum;
    3701             :                     Oid         seq_relid;
    3702             : 
    3703             :                     /*
    3704             :                      * Split options into those handled by ALTER SEQUENCE and
    3705             :                      * those for ALTER TABLE proper.
    3706             :                      */
    3707         184 :                     foreach(lc, castNode(List, cmd->def))
    3708             :                     {
    3709         122 :                         DefElem    *def = lfirst_node(DefElem, lc);
    3710             : 
    3711         122 :                         if (strcmp(def->defname, "generated") == 0)
    3712          44 :                             newdef = lappend(newdef, def);
    3713             :                         else
    3714          78 :                             newseqopts = lappend(newseqopts, def);
    3715             :                     }
    3716             : 
    3717          62 :                     attnum = get_attnum(relid, cmd->name);
    3718          62 :                     if (attnum == InvalidAttrNumber)
    3719           0 :                         ereport(ERROR,
    3720             :                                 (errcode(ERRCODE_UNDEFINED_COLUMN),
    3721             :                                  errmsg("column \"%s\" of relation \"%s\" does not exist",
    3722             :                                         cmd->name, RelationGetRelationName(rel))));
    3723             : 
    3724          62 :                     seq_relid = getIdentitySequence(rel, attnum, true);
    3725             : 
    3726          62 :                     if (seq_relid)
    3727             :                     {
    3728             :                         AlterSeqStmt *seqstmt;
    3729             : 
    3730          50 :                         seqstmt = makeNode(AlterSeqStmt);
    3731          50 :                         seqstmt->sequence = makeRangeVar(get_namespace_name(get_rel_namespace(seq_relid)),
    3732             :                                                          get_rel_name(seq_relid), -1);
    3733          50 :                         seqstmt->options = newseqopts;
    3734          50 :                         seqstmt->for_identity = true;
    3735          50 :                         seqstmt->missing_ok = false;
    3736             : 
    3737          50 :                         cxt.blist = lappend(cxt.blist, seqstmt);
    3738             :                     }
    3739             : 
    3740             :                     /*
    3741             :                      * If column was not an identity column, we just let the
    3742             :                      * ALTER TABLE command error out later.  (There are cases
    3743             :                      * this fails to cover, but we'll need to restructure
    3744             :                      * where creation of the sequence dependency linkage
    3745             :                      * happens before we can fix it.)
    3746             :                      */
    3747             : 
    3748          62 :                     cmd->def = (Node *) newdef;
    3749          62 :                     newcmds = lappend(newcmds, cmd);
    3750          62 :                     break;
    3751             :                 }
    3752             : 
    3753        3280 :             case AT_AttachPartition:
    3754             :             case AT_DetachPartition:
    3755             :                 {
    3756        3280 :                     PartitionCmd *partcmd = (PartitionCmd *) cmd->def;
    3757             : 
    3758        3280 :                     transformPartitionCmd(&cxt, partcmd);
    3759             :                     /* assign transformed value of the partition bound */
    3760        3256 :                     partcmd->bound = cxt.partbound;
    3761             :                 }
    3762             : 
    3763        3256 :                 newcmds = lappend(newcmds, cmd);
    3764        3256 :                 break;
    3765             : 
    3766           0 :             default:
    3767             : 
    3768             :                 /*
    3769             :                  * Currently, we shouldn't actually get here for subcommand
    3770             :                  * types that don't require transformation; but if we do, just
    3771             :                  * emit them unchanged.
    3772             :                  */
    3773           0 :                 newcmds = lappend(newcmds, cmd);
    3774           0 :                 break;
    3775             :         }
    3776             :     }
    3777             : 
    3778             :     /*
    3779             :      * Transfer anything we already have in cxt.alist into save_alist, to keep
    3780             :      * it separate from the output of transformIndexConstraints.
    3781             :      */
    3782       22438 :     save_alist = cxt.alist;
    3783       22438 :     cxt.alist = NIL;
    3784             : 
    3785             :     /* Postprocess constraints */
    3786       22438 :     transformIndexConstraints(&cxt);
    3787       22414 :     transformFKConstraints(&cxt, skipValidation, true);
    3788       22414 :     transformCheckConstraints(&cxt, false);
    3789             : 
    3790             :     /*
    3791             :      * Push any index-creation commands into the ALTER, so that they can be
    3792             :      * scheduled nicely by tablecmds.c.  Note that tablecmds.c assumes that
    3793             :      * the IndexStmt attached to an AT_AddIndex or AT_AddIndexConstraint
    3794             :      * subcommand has already been through transformIndexStmt.
    3795             :      */
    3796       33384 :     foreach(l, cxt.alist)
    3797             :     {
    3798       10970 :         Node       *istmt = (Node *) lfirst(l);
    3799             : 
    3800             :         /*
    3801             :          * We assume here that cxt.alist contains only IndexStmts generated
    3802             :          * from primary key constraints.
    3803             :          */
    3804       10970 :         if (IsA(istmt, IndexStmt))
    3805             :         {
    3806       10970 :             IndexStmt  *idxstmt = (IndexStmt *) istmt;
    3807             : 
    3808       10970 :             idxstmt = transformIndexStmt(relid, idxstmt, queryString);
    3809       10970 :             newcmd = makeNode(AlterTableCmd);
    3810       10970 :             newcmd->subtype = OidIsValid(idxstmt->indexOid) ? AT_AddIndexConstraint : AT_AddIndex;
    3811       10970 :             newcmd->def = (Node *) idxstmt;
    3812       10970 :             newcmds = lappend(newcmds, newcmd);
    3813             :         }
    3814             :         else
    3815           0 :             elog(ERROR, "unexpected stmt type %d", (int) nodeTag(istmt));
    3816             :     }
    3817       22414 :     cxt.alist = NIL;
    3818             : 
    3819             :     /* Append any CHECK, NOT NULL or FK constraints to the commands list */
    3820       45766 :     foreach_node(Constraint, def, cxt.ckconstraints)
    3821             :     {
    3822         938 :         newcmd = makeNode(AlterTableCmd);
    3823         938 :         newcmd->subtype = AT_AddConstraint;
    3824         938 :         newcmd->def = (Node *) def;
    3825         938 :         newcmds = lappend(newcmds, newcmd);
    3826             :     }
    3827       53492 :     foreach_node(Constraint, def, cxt.nnconstraints)
    3828             :     {
    3829        8664 :         newcmd = makeNode(AlterTableCmd);
    3830        8664 :         newcmd->subtype = AT_AddConstraint;
    3831        8664 :         newcmd->def = (Node *) def;
    3832        8664 :         newcmds = lappend(newcmds, newcmd);
    3833             :     }
    3834       47410 :     foreach_node(Constraint, def, cxt.fkconstraints)
    3835             :     {
    3836        2582 :         newcmd = makeNode(AlterTableCmd);
    3837        2582 :         newcmd->subtype = AT_AddConstraint;
    3838        2582 :         newcmd->def = (Node *) def;
    3839        2582 :         newcmds = lappend(newcmds, newcmd);
    3840             :     }
    3841             : 
    3842             :     /* Close rel */
    3843       22414 :     relation_close(rel, NoLock);
    3844             : 
    3845             :     /*
    3846             :      * Output results.
    3847             :      */
    3848       22414 :     stmt->cmds = newcmds;
    3849             : 
    3850       22414 :     *beforeStmts = cxt.blist;
    3851       22414 :     *afterStmts = list_concat(cxt.alist, save_alist);
    3852             : 
    3853       22414 :     return stmt;
    3854             : }
    3855             : 
    3856             : 
    3857             : /*
    3858             :  * Preprocess a list of column constraint clauses
    3859             :  * to attach constraint attributes to their primary constraint nodes
    3860             :  * and detect inconsistent/misplaced constraint attributes.
    3861             :  *
    3862             :  * NOTE: currently, attributes are only supported for FOREIGN KEY, UNIQUE,
    3863             :  * EXCLUSION, and PRIMARY KEY constraints, but someday they ought to be
    3864             :  * supported for other constraint types.
    3865             :  */
    3866             : static void
    3867       66148 : transformConstraintAttrs(CreateStmtContext *cxt, List *constraintList)
    3868             : {
    3869       66148 :     Constraint *lastprimarycon = NULL;
    3870       66148 :     bool        saw_deferrability = false;
    3871       66148 :     bool        saw_initially = false;
    3872       66148 :     bool        saw_enforced = false;
    3873             :     ListCell   *clist;
    3874             : 
    3875             : #define SUPPORTS_ATTRS(node)                \
    3876             :     ((node) != NULL &&                      \
    3877             :      ((node)->contype == CONSTR_PRIMARY ||   \
    3878             :       (node)->contype == CONSTR_UNIQUE ||    \
    3879             :       (node)->contype == CONSTR_EXCLUSION || \
    3880             :       (node)->contype == CONSTR_FOREIGN))
    3881             : 
    3882       84518 :     foreach(clist, constraintList)
    3883             :     {
    3884       18388 :         Constraint *con = (Constraint *) lfirst(clist);
    3885             : 
    3886       18388 :         if (!IsA(con, Constraint))
    3887           0 :             elog(ERROR, "unrecognized node type: %d",
    3888             :                  (int) nodeTag(con));
    3889       18388 :         switch (con->contype)
    3890             :         {
    3891          94 :             case CONSTR_ATTR_DEFERRABLE:
    3892          94 :                 if (!SUPPORTS_ATTRS(lastprimarycon))
    3893           0 :                     ereport(ERROR,
    3894             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3895             :                              errmsg("misplaced DEFERRABLE clause"),
    3896             :                              parser_errposition(cxt->pstate, con->location)));
    3897          94 :                 if (saw_deferrability)
    3898           0 :                     ereport(ERROR,
    3899             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3900             :                              errmsg("multiple DEFERRABLE/NOT DEFERRABLE clauses not allowed"),
    3901             :                              parser_errposition(cxt->pstate, con->location)));
    3902          94 :                 saw_deferrability = true;
    3903          94 :                 lastprimarycon->deferrable = true;
    3904          94 :                 break;
    3905             : 
    3906           0 :             case CONSTR_ATTR_NOT_DEFERRABLE:
    3907           0 :                 if (!SUPPORTS_ATTRS(lastprimarycon))
    3908           0 :                     ereport(ERROR,
    3909             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3910             :                              errmsg("misplaced NOT DEFERRABLE clause"),
    3911             :                              parser_errposition(cxt->pstate, con->location)));
    3912           0 :                 if (saw_deferrability)
    3913           0 :                     ereport(ERROR,
    3914             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3915             :                              errmsg("multiple DEFERRABLE/NOT DEFERRABLE clauses not allowed"),
    3916             :                              parser_errposition(cxt->pstate, con->location)));
    3917           0 :                 saw_deferrability = true;
    3918           0 :                 lastprimarycon->deferrable = false;
    3919           0 :                 if (saw_initially &&
    3920           0 :                     lastprimarycon->initdeferred)
    3921           0 :                     ereport(ERROR,
    3922             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3923             :                              errmsg("constraint declared INITIALLY DEFERRED must be DEFERRABLE"),
    3924             :                              parser_errposition(cxt->pstate, con->location)));
    3925           0 :                 break;
    3926             : 
    3927          76 :             case CONSTR_ATTR_DEFERRED:
    3928          76 :                 if (!SUPPORTS_ATTRS(lastprimarycon))
    3929           0 :                     ereport(ERROR,
    3930             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3931             :                              errmsg("misplaced INITIALLY DEFERRED clause"),
    3932             :                              parser_errposition(cxt->pstate, con->location)));
    3933          76 :                 if (saw_initially)
    3934           0 :                     ereport(ERROR,
    3935             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3936             :                              errmsg("multiple INITIALLY IMMEDIATE/DEFERRED clauses not allowed"),
    3937             :                              parser_errposition(cxt->pstate, con->location)));
    3938          76 :                 saw_initially = true;
    3939          76 :                 lastprimarycon->initdeferred = true;
    3940             : 
    3941             :                 /*
    3942             :                  * If only INITIALLY DEFERRED appears, assume DEFERRABLE
    3943             :                  */
    3944          76 :                 if (!saw_deferrability)
    3945          26 :                     lastprimarycon->deferrable = true;
    3946          50 :                 else if (!lastprimarycon->deferrable)
    3947           0 :                     ereport(ERROR,
    3948             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3949             :                              errmsg("constraint declared INITIALLY DEFERRED must be DEFERRABLE"),
    3950             :                              parser_errposition(cxt->pstate, con->location)));
    3951          76 :                 break;
    3952             : 
    3953           6 :             case CONSTR_ATTR_IMMEDIATE:
    3954           6 :                 if (!SUPPORTS_ATTRS(lastprimarycon))
    3955           0 :                     ereport(ERROR,
    3956             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3957             :                              errmsg("misplaced INITIALLY IMMEDIATE clause"),
    3958             :                              parser_errposition(cxt->pstate, con->location)));
    3959           6 :                 if (saw_initially)
    3960           0 :                     ereport(ERROR,
    3961             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3962             :                              errmsg("multiple INITIALLY IMMEDIATE/DEFERRED clauses not allowed"),
    3963             :                              parser_errposition(cxt->pstate, con->location)));
    3964           6 :                 saw_initially = true;
    3965           6 :                 lastprimarycon->initdeferred = false;
    3966           6 :                 break;
    3967             : 
    3968          30 :             case CONSTR_ATTR_ENFORCED:
    3969          30 :                 if (lastprimarycon == NULL ||
    3970          30 :                     lastprimarycon->contype != CONSTR_CHECK)
    3971           6 :                     ereport(ERROR,
    3972             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3973             :                              errmsg("misplaced ENFORCED clause"),
    3974             :                              parser_errposition(cxt->pstate, con->location)));
    3975          24 :                 if (saw_enforced)
    3976           6 :                     ereport(ERROR,
    3977             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3978             :                              errmsg("multiple ENFORCED/NOT ENFORCED clauses not allowed"),
    3979             :                              parser_errposition(cxt->pstate, con->location)));
    3980          18 :                 saw_enforced = true;
    3981          18 :                 lastprimarycon->is_enforced = true;
    3982          18 :                 break;
    3983             : 
    3984          48 :             case CONSTR_ATTR_NOT_ENFORCED:
    3985          48 :                 if (lastprimarycon == NULL ||
    3986          48 :                     lastprimarycon->contype != CONSTR_CHECK)
    3987           6 :                     ereport(ERROR,
    3988             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3989             :                              errmsg("misplaced NOT ENFORCED clause"),
    3990             :                              parser_errposition(cxt->pstate, con->location)));
    3991          42 :                 if (saw_enforced)
    3992           0 :                     ereport(ERROR,
    3993             :                             (errcode(ERRCODE_SYNTAX_ERROR),
    3994             :                              errmsg("multiple ENFORCED/NOT ENFORCED clauses not allowed"),
    3995             :                              parser_errposition(cxt->pstate, con->location)));
    3996          42 :                 saw_enforced = true;
    3997          42 :                 lastprimarycon->is_enforced = false;
    3998             : 
    3999             :                 /* A NOT ENFORCED constraint must be marked as invalid. */
    4000          42 :                 lastprimarycon->skip_validation = true;
    4001          42 :                 lastprimarycon->initially_valid = false;
    4002          42 :                 break;
    4003             : 
    4004       18134 :             default:
    4005             :                 /* Otherwise it's not an attribute */
    4006       18134 :                 lastprimarycon = con;
    4007             :                 /* reset flags for new primary node */
    4008       18134 :                 saw_deferrability = false;
    4009       18134 :                 saw_initially = false;
    4010       18134 :                 saw_enforced = false;
    4011       18134 :                 break;
    4012             :         }
    4013             :     }
    4014       66130 : }
    4015             : 
    4016             : /*
    4017             :  * Special handling of type definition for a column
    4018             :  */
    4019             : static void
    4020       65840 : transformColumnType(CreateStmtContext *cxt, ColumnDef *column)
    4021             : {
    4022             :     /*
    4023             :      * All we really need to do here is verify that the type is valid,
    4024             :      * including any collation spec that might be present.
    4025             :      */
    4026       65840 :     Type        ctype = typenameType(cxt->pstate, column->typeName, NULL);
    4027             : 
    4028       65826 :     if (column->collClause)
    4029             :     {
    4030         520 :         Form_pg_type typtup = (Form_pg_type) GETSTRUCT(ctype);
    4031             : 
    4032         520 :         LookupCollation(cxt->pstate,
    4033         520 :                         column->collClause->collname,
    4034         520 :                         column->collClause->location);
    4035             :         /* Complain if COLLATE is applied to an uncollatable type */
    4036         508 :         if (!OidIsValid(typtup->typcollation))
    4037          12 :             ereport(ERROR,
    4038             :                     (errcode(ERRCODE_DATATYPE_MISMATCH),
    4039             :                      errmsg("collations are not supported by type %s",
    4040             :                             format_type_be(typtup->oid)),
    4041             :                      parser_errposition(cxt->pstate,
    4042             :                                         column->collClause->location)));
    4043             :     }
    4044             : 
    4045       65802 :     ReleaseSysCache(ctype);
    4046       65802 : }
    4047             : 
    4048             : 
    4049             : /*
    4050             :  * transformCreateSchemaStmtElements -
    4051             :  *    analyzes the elements of a CREATE SCHEMA statement
    4052             :  *
    4053             :  * Split the schema element list from a CREATE SCHEMA statement into
    4054             :  * individual commands and place them in the result list in an order
    4055             :  * such that there are no forward references (e.g. GRANT to a table
    4056             :  * created later in the list). Note that the logic we use for determining
    4057             :  * forward references is presently quite incomplete.
    4058             :  *
    4059             :  * "schemaName" is the name of the schema that will be used for the creation
    4060             :  * of the objects listed, that may be compiled from the schema name defined
    4061             :  * in the statement or a role specification.
    4062             :  *
    4063             :  * SQL also allows constraints to make forward references, so thumb through
    4064             :  * the table columns and move forward references to a posterior alter-table
    4065             :  * command.
    4066             :  *
    4067             :  * The result is a list of parse nodes that still need to be analyzed ---
    4068             :  * but we can't analyze the later commands until we've executed the earlier
    4069             :  * ones, because of possible inter-object references.
    4070             :  *
    4071             :  * Note: this breaks the rules a little bit by modifying schema-name fields
    4072             :  * within passed-in structs.  However, the transformation would be the same
    4073             :  * if done over, so it should be all right to scribble on the input to this
    4074             :  * extent.
    4075             :  */
    4076             : List *
    4077         986 : transformCreateSchemaStmtElements(List *schemaElts, const char *schemaName)
    4078             : {
    4079             :     CreateSchemaStmtContext cxt;
    4080             :     List       *result;
    4081             :     ListCell   *elements;
    4082             : 
    4083         986 :     cxt.schemaname = schemaName;
    4084         986 :     cxt.sequences = NIL;
    4085         986 :     cxt.tables = NIL;
    4086         986 :     cxt.views = NIL;
    4087         986 :     cxt.indexes = NIL;
    4088         986 :     cxt.triggers = NIL;
    4089         986 :     cxt.grants = NIL;
    4090             : 
    4091             :     /*
    4092             :      * Run through each schema element in the schema element list. Separate
    4093             :      * statements by type, and do preliminary analysis.
    4094             :      */
    4095        1436 :     foreach(elements, schemaElts)
    4096             :     {
    4097         540 :         Node       *element = lfirst(elements);
    4098             : 
    4099         540 :         switch (nodeTag(element))
    4100             :         {
    4101          18 :             case T_CreateSeqStmt:
    4102             :                 {
    4103          18 :                     CreateSeqStmt *elp = (CreateSeqStmt *) element;
    4104             : 
    4105          18 :                     setSchemaName(cxt.schemaname, &elp->sequence->schemaname);
    4106           0 :                     cxt.sequences = lappend(cxt.sequences, element);
    4107             :                 }
    4108           0 :                 break;
    4109             : 
    4110         428 :             case T_CreateStmt:
    4111             :                 {
    4112         428 :                     CreateStmt *elp = (CreateStmt *) element;
    4113             : 
    4114         428 :                     setSchemaName(cxt.schemaname, &elp->relation->schemaname);
    4115             : 
    4116             :                     /*
    4117             :                      * XXX todo: deal with constraints
    4118             :                      */
    4119         410 :                     cxt.tables = lappend(cxt.tables, element);
    4120             :                 }
    4121         410 :                 break;
    4122             : 
    4123          44 :             case T_ViewStmt:
    4124             :                 {
    4125          44 :                     ViewStmt   *elp = (ViewStmt *) element;
    4126             : 
    4127          44 :                     setSchemaName(cxt.schemaname, &elp->view->schemaname);
    4128             : 
    4129             :                     /*
    4130             :                      * XXX todo: deal with references between views
    4131             :                      */
    4132          26 :                     cxt.views = lappend(cxt.views, element);
    4133             :                 }
    4134          26 :                 break;
    4135             : 
    4136          32 :             case T_IndexStmt:
    4137             :                 {
    4138          32 :                     IndexStmt  *elp = (IndexStmt *) element;
    4139             : 
    4140          32 :                     setSchemaName(cxt.schemaname, &elp->relation->schemaname);
    4141          14 :                     cxt.indexes = lappend(cxt.indexes, element);
    4142             :                 }
    4143          14 :                 break;
    4144             : 
    4145          18 :             case T_CreateTrigStmt:
    4146             :                 {
    4147          18 :                     CreateTrigStmt *elp = (CreateTrigStmt *) element;
    4148             : 
    4149          18 :                     setSchemaName(cxt.schemaname, &elp->relation->schemaname);
    4150           0 :                     cxt.triggers = lappend(cxt.triggers, element);
    4151             :                 }
    4152           0 :                 break;
    4153             : 
    4154           0 :             case T_GrantStmt:
    4155           0 :                 cxt.grants = lappend(cxt.grants, element);
    4156           0 :                 break;
    4157             : 
    4158           0 :             default:
    4159           0 :                 elog(ERROR, "unrecognized node type: %d",
    4160             :                      (int) nodeTag(element));
    4161             :         }
    4162             :     }
    4163             : 
    4164         896 :     result = NIL;
    4165         896 :     result = list_concat(result, cxt.sequences);
    4166         896 :     result = list_concat(result, cxt.tables);
    4167         896 :     result = list_concat(result, cxt.views);
    4168         896 :     result = list_concat(result, cxt.indexes);
    4169         896 :     result = list_concat(result, cxt.triggers);
    4170         896 :     result = list_concat(result, cxt.grants);
    4171             : 
    4172         896 :     return result;
    4173             : }
    4174             : 
    4175             : /*
    4176             :  * setSchemaName
    4177             :  *      Set or check schema name in an element of a CREATE SCHEMA command
    4178             :  */
    4179             : static void
    4180         540 : setSchemaName(const char *context_schema, char **stmt_schema_name)
    4181             : {
    4182         540 :     if (*stmt_schema_name == NULL)
    4183         432 :         *stmt_schema_name = unconstify(char *, context_schema);
    4184         108 :     else if (strcmp(context_schema, *stmt_schema_name) != 0)
    4185          90 :         ereport(ERROR,
    4186             :                 (errcode(ERRCODE_INVALID_SCHEMA_DEFINITION),
    4187             :                  errmsg("CREATE specifies a schema (%s) "
    4188             :                         "different from the one being created (%s)",
    4189             :                         *stmt_schema_name, context_schema)));
    4190         450 : }
    4191             : 
    4192             : /*
    4193             :  * transformPartitionCmd
    4194             :  *      Analyze the ATTACH/DETACH PARTITION command
    4195             :  *
    4196             :  * In case of the ATTACH PARTITION command, cxt->partbound is set to the
    4197             :  * transformed value of cmd->bound.
    4198             :  */
    4199             : static void
    4200        3280 : transformPartitionCmd(CreateStmtContext *cxt, PartitionCmd *cmd)
    4201             : {
    4202        3280 :     Relation    parentRel = cxt->rel;
    4203             : 
    4204        3280 :     switch (parentRel->rd_rel->relkind)
    4205             :     {
    4206        2882 :         case RELKIND_PARTITIONED_TABLE:
    4207             :             /* transform the partition bound, if any */
    4208             :             Assert(RelationGetPartitionKey(parentRel) != NULL);
    4209        2882 :             if (cmd->bound != NULL)
    4210        2324 :                 cxt->partbound = transformPartitionBound(cxt->pstate, parentRel,
    4211             :                                                          cmd->bound);
    4212        2864 :             break;
    4213         398 :         case RELKIND_PARTITIONED_INDEX:
    4214             : 
    4215             :             /*
    4216             :              * A partitioned index cannot have a partition bound set.  ALTER
    4217             :              * INDEX prevents that with its grammar, but not ALTER TABLE.
    4218             :              */
    4219         398 :             if (cmd->bound != NULL)
    4220           6 :                 ereport(ERROR,
    4221             :                         (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    4222             :                          errmsg("\"%s\" is not a partitioned table",
    4223             :                                 RelationGetRelationName(parentRel))));
    4224         392 :             break;
    4225           0 :         case RELKIND_RELATION:
    4226             :             /* the table must be partitioned */
    4227           0 :             ereport(ERROR,
    4228             :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    4229             :                      errmsg("table \"%s\" is not partitioned",
    4230             :                             RelationGetRelationName(parentRel))));
    4231             :             break;
    4232           0 :         case RELKIND_INDEX:
    4233             :             /* the index must be partitioned */
    4234           0 :             ereport(ERROR,
    4235             :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    4236             :                      errmsg("index \"%s\" is not partitioned",
    4237             :                             RelationGetRelationName(parentRel))));
    4238             :             break;
    4239           0 :         default:
    4240             :             /* parser shouldn't let this case through */
    4241           0 :             elog(ERROR, "\"%s\" is not a partitioned table or index",
    4242             :                  RelationGetRelationName(parentRel));
    4243             :             break;
    4244             :     }
    4245        3256 : }
    4246             : 
    4247             : /*
    4248             :  * transformPartitionBound
    4249             :  *
    4250             :  * Transform a partition bound specification
    4251             :  */
    4252             : PartitionBoundSpec *
    4253       10124 : transformPartitionBound(ParseState *pstate, Relation parent,
    4254             :                         PartitionBoundSpec *spec)
    4255             : {
    4256             :     PartitionBoundSpec *result_spec;
    4257       10124 :     PartitionKey key = RelationGetPartitionKey(parent);
    4258       10124 :     char        strategy = get_partition_strategy(key);
    4259       10124 :     int         partnatts = get_partition_natts(key);
    4260       10124 :     List       *partexprs = get_partition_exprs(key);
    4261             : 
    4262             :     /* Avoid scribbling on input */
    4263       10124 :     result_spec = copyObject(spec);
    4264             : 
    4265       10124 :     if (spec->is_default)
    4266             :     {
    4267             :         /*
    4268             :          * Hash partitioning does not support a default partition; there's no
    4269             :          * use case for it (since the set of partitions to create is perfectly
    4270             :          * defined), and if users do get into it accidentally, it's hard to
    4271             :          * back out from it afterwards.
    4272             :          */
    4273         574 :         if (strategy == PARTITION_STRATEGY_HASH)
    4274           6 :             ereport(ERROR,
    4275             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
    4276             :                      errmsg("a hash-partitioned table may not have a default partition")));
    4277             : 
    4278             :         /*
    4279             :          * In case of the default partition, parser had no way to identify the
    4280             :          * partition strategy. Assign the parent's strategy to the default
    4281             :          * partition bound spec.
    4282             :          */
    4283         568 :         result_spec->strategy = strategy;
    4284             : 
    4285         568 :         return result_spec;
    4286             :     }
    4287             : 
    4288        9550 :     if (strategy == PARTITION_STRATEGY_HASH)
    4289             :     {
    4290         692 :         if (spec->strategy != PARTITION_STRATEGY_HASH)
    4291          12 :             ereport(ERROR,
    4292             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
    4293             :                      errmsg("invalid bound specification for a hash partition"),
    4294             :                      parser_errposition(pstate, exprLocation((Node *) spec))));
    4295             : 
    4296         680 :         if (spec->modulus <= 0)
    4297          12 :             ereport(ERROR,
    4298             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
    4299             :                      errmsg("modulus for hash partition must be an integer value greater than zero")));
    4300             : 
    4301             :         Assert(spec->remainder >= 0);
    4302             : 
    4303         668 :         if (spec->remainder >= spec->modulus)
    4304          12 :             ereport(ERROR,
    4305             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
    4306             :                      errmsg("remainder for hash partition must be less than modulus")));
    4307             :     }
    4308        8858 :     else if (strategy == PARTITION_STRATEGY_LIST)
    4309             :     {
    4310             :         ListCell   *cell;
    4311             :         char       *colname;
    4312             :         Oid         coltype;
    4313             :         int32       coltypmod;
    4314             :         Oid         partcollation;
    4315             : 
    4316        4808 :         if (spec->strategy != PARTITION_STRATEGY_LIST)
    4317          18 :             ereport(ERROR,
    4318             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
    4319             :                      errmsg("invalid bound specification for a list partition"),
    4320             :                      parser_errposition(pstate, exprLocation((Node *) spec))));
    4321             : 
    4322             :         /* Get the only column's name in case we need to output an error */
    4323        4790 :         if (key->partattrs[0] != 0)
    4324        4658 :             colname = get_attname(RelationGetRelid(parent),
    4325        4658 :                                   key->partattrs[0], false);
    4326             :         else
    4327         132 :             colname = deparse_expression((Node *) linitial(partexprs),
    4328         132 :                                          deparse_context_for(RelationGetRelationName(parent),
    4329             :                                                              RelationGetRelid(parent)),
    4330             :                                          false, false);
    4331             :         /* Need its type data too */
    4332        4790 :         coltype = get_partition_col_typid(key, 0);
    4333        4790 :         coltypmod = get_partition_col_typmod(key, 0);
    4334        4790 :         partcollation = get_partition_col_collation(key, 0);
    4335             : 
    4336        4790 :         result_spec->listdatums = NIL;
    4337       11796 :         foreach(cell, spec->listdatums)
    4338             :         {
    4339        7066 :             Node       *expr = lfirst(cell);
    4340             :             Const      *value;
    4341             :             ListCell   *cell2;
    4342             :             bool        duplicate;
    4343             : 
    4344        7066 :             value = transformPartitionBoundValue(pstate, expr,
    4345             :                                                  colname, coltype, coltypmod,
    4346             :                                                  partcollation);
    4347             : 
    4348             :             /* Don't add to the result if the value is a duplicate */
    4349        7006 :             duplicate = false;
    4350       12154 :             foreach(cell2, result_spec->listdatums)
    4351             :             {
    4352        5148 :                 Const      *value2 = lfirst_node(Const, cell2);
    4353             : 
    4354        5148 :                 if (equal(value, value2))
    4355             :                 {
    4356           0 :                     duplicate = true;
    4357           0 :                     break;
    4358             :                 }
    4359             :             }
    4360        7006 :             if (duplicate)
    4361           0 :                 continue;
    4362             : 
    4363        7006 :             result_spec->listdatums = lappend(result_spec->listdatums,
    4364             :                                               value);
    4365             :         }
    4366             :     }
    4367        4050 :     else if (strategy == PARTITION_STRATEGY_RANGE)
    4368             :     {
    4369        4050 :         if (spec->strategy != PARTITION_STRATEGY_RANGE)
    4370          18 :             ereport(ERROR,
    4371             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
    4372             :                      errmsg("invalid bound specification for a range partition"),
    4373             :                      parser_errposition(pstate, exprLocation((Node *) spec))));
    4374             : 
    4375        4032 :         if (list_length(spec->lowerdatums) != partnatts)
    4376           6 :             ereport(ERROR,
    4377             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
    4378             :                      errmsg("FROM must specify exactly one value per partitioning column")));
    4379        4026 :         if (list_length(spec->upperdatums) != partnatts)
    4380           6 :             ereport(ERROR,
    4381             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
    4382             :                      errmsg("TO must specify exactly one value per partitioning column")));
    4383             : 
    4384             :         /*
    4385             :          * Convert raw parse nodes into PartitionRangeDatum nodes and perform
    4386             :          * any necessary validation.
    4387             :          */
    4388        3954 :         result_spec->lowerdatums =
    4389        4020 :             transformPartitionRangeBounds(pstate, spec->lowerdatums,
    4390             :                                           parent);
    4391        3948 :         result_spec->upperdatums =
    4392        3954 :             transformPartitionRangeBounds(pstate, spec->upperdatums,
    4393             :                                           parent);
    4394             :     }
    4395             :     else
    4396           0 :         elog(ERROR, "unexpected partition strategy: %d", (int) strategy);
    4397             : 
    4398        9334 :     return result_spec;
    4399             : }
    4400             : 
    4401             : /*
    4402             :  * transformPartitionRangeBounds
    4403             :  *      This converts the expressions for range partition bounds from the raw
    4404             :  *      grammar representation to PartitionRangeDatum structs
    4405             :  */
    4406             : static List *
    4407        7974 : transformPartitionRangeBounds(ParseState *pstate, List *blist,
    4408             :                               Relation parent)
    4409             : {
    4410        7974 :     List       *result = NIL;
    4411        7974 :     PartitionKey key = RelationGetPartitionKey(parent);
    4412        7974 :     List       *partexprs = get_partition_exprs(key);
    4413             :     ListCell   *lc;
    4414             :     int         i,
    4415             :                 j;
    4416             : 
    4417        7974 :     i = j = 0;
    4418       17882 :     foreach(lc, blist)
    4419             :     {
    4420        9962 :         Node       *expr = lfirst(lc);
    4421        9962 :         PartitionRangeDatum *prd = NULL;
    4422             : 
    4423             :         /*
    4424             :          * Infinite range bounds -- "minvalue" and "maxvalue" -- get passed in
    4425             :          * as ColumnRefs.
    4426             :          */
    4427        9962 :         if (IsA(expr, ColumnRef))
    4428             :         {
    4429         750 :             ColumnRef  *cref = (ColumnRef *) expr;
    4430         750 :             char       *cname = NULL;
    4431             : 
    4432             :             /*
    4433             :              * There should be a single field named either "minvalue" or
    4434             :              * "maxvalue".
    4435             :              */
    4436         750 :             if (list_length(cref->fields) == 1 &&
    4437         744 :                 IsA(linitial(cref->fields), String))
    4438         744 :                 cname = strVal(linitial(cref->fields));
    4439             : 
    4440         750 :             if (cname == NULL)
    4441             :             {
    4442             :                 /*
    4443             :                  * ColumnRef is not in the desired single-field-name form. For
    4444             :                  * consistency between all partition strategies, let the
    4445             :                  * expression transformation report any errors rather than
    4446             :                  * doing it ourselves.
    4447             :                  */
    4448             :             }
    4449         744 :             else if (strcmp("minvalue", cname) == 0)
    4450             :             {
    4451         378 :                 prd = makeNode(PartitionRangeDatum);
    4452         378 :                 prd->kind = PARTITION_RANGE_DATUM_MINVALUE;
    4453         378 :                 prd->value = NULL;
    4454             :             }
    4455         366 :             else if (strcmp("maxvalue", cname) == 0)
    4456             :             {
    4457         354 :                 prd = makeNode(PartitionRangeDatum);
    4458         354 :                 prd->kind = PARTITION_RANGE_DATUM_MAXVALUE;
    4459         354 :                 prd->value = NULL;
    4460             :             }
    4461             :         }
    4462             : 
    4463        9962 :         if (prd == NULL)
    4464             :         {
    4465             :             char       *colname;
    4466             :             Oid         coltype;
    4467             :             int32       coltypmod;
    4468             :             Oid         partcollation;
    4469             :             Const      *value;
    4470             : 
    4471             :             /* Get the column's name in case we need to output an error */
    4472        9230 :             if (key->partattrs[i] != 0)
    4473        8412 :                 colname = get_attname(RelationGetRelid(parent),
    4474        8412 :                                       key->partattrs[i], false);
    4475             :             else
    4476             :             {
    4477         818 :                 colname = deparse_expression((Node *) list_nth(partexprs, j),
    4478         818 :                                              deparse_context_for(RelationGetRelationName(parent),
    4479             :                                                                  RelationGetRelid(parent)),
    4480             :                                              false, false);
    4481         818 :                 ++j;
    4482             :             }
    4483             : 
    4484             :             /* Need its type data too */
    4485        9230 :             coltype = get_partition_col_typid(key, i);
    4486        9230 :             coltypmod = get_partition_col_typmod(key, i);
    4487        9230 :             partcollation = get_partition_col_collation(key, i);
    4488             : 
    4489        9230 :             value = transformPartitionBoundValue(pstate, expr,
    4490             :                                                  colname,
    4491             :                                                  coltype, coltypmod,
    4492             :                                                  partcollation);
    4493        9182 :             if (value->constisnull)
    4494           6 :                 ereport(ERROR,
    4495             :                         (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    4496             :                          errmsg("cannot specify NULL in range bound")));
    4497        9176 :             prd = makeNode(PartitionRangeDatum);
    4498        9176 :             prd->kind = PARTITION_RANGE_DATUM_VALUE;
    4499        9176 :             prd->value = (Node *) value;
    4500        9176 :             ++i;
    4501             :         }
    4502             : 
    4503        9908 :         prd->location = exprLocation(expr);
    4504             : 
    4505        9908 :         result = lappend(result, prd);
    4506             :     }
    4507             : 
    4508             :     /*
    4509             :      * Once we see MINVALUE or MAXVALUE for one column, the remaining columns
    4510             :      * must be the same.
    4511             :      */
    4512        7920 :     validateInfiniteBounds(pstate, result);
    4513             : 
    4514        7902 :     return result;
    4515             : }
    4516             : 
    4517             : /*
    4518             :  * validateInfiniteBounds
    4519             :  *
    4520             :  * Check that a MAXVALUE or MINVALUE specification in a partition bound is
    4521             :  * followed only by more of the same.
    4522             :  */
    4523             : static void
    4524        7920 : validateInfiniteBounds(ParseState *pstate, List *blist)
    4525             : {
    4526             :     ListCell   *lc;
    4527        7920 :     PartitionRangeDatumKind kind = PARTITION_RANGE_DATUM_VALUE;
    4528             : 
    4529       17804 :     foreach(lc, blist)
    4530             :     {
    4531        9902 :         PartitionRangeDatum *prd = lfirst_node(PartitionRangeDatum, lc);
    4532             : 
    4533        9902 :         if (kind == prd->kind)
    4534        9362 :             continue;
    4535             : 
    4536         540 :         switch (kind)
    4537             :         {
    4538         522 :             case PARTITION_RANGE_DATUM_VALUE:
    4539         522 :                 kind = prd->kind;
    4540         522 :                 break;
    4541             : 
    4542           6 :             case PARTITION_RANGE_DATUM_MAXVALUE:
    4543           6 :                 ereport(ERROR,
    4544             :                         (errcode(ERRCODE_DATATYPE_MISMATCH),
    4545             :                          errmsg("every bound following MAXVALUE must also be MAXVALUE"),
    4546             :                          parser_errposition(pstate, exprLocation((Node *) prd))));
    4547             :                 break;
    4548             : 
    4549          12 :             case PARTITION_RANGE_DATUM_MINVALUE:
    4550          12 :                 ereport(ERROR,
    4551             :                         (errcode(ERRCODE_DATATYPE_MISMATCH),
    4552             :                          errmsg("every bound following MINVALUE must also be MINVALUE"),
    4553             :                          parser_errposition(pstate, exprLocation((Node *) prd))));
    4554             :                 break;
    4555             :         }
    4556        9884 :     }
    4557        7902 : }
    4558             : 
    4559             : /*
    4560             :  * Transform one entry in a partition bound spec, producing a constant.
    4561             :  */
    4562             : static Const *
    4563       16296 : transformPartitionBoundValue(ParseState *pstate, Node *val,
    4564             :                              const char *colName, Oid colType, int32 colTypmod,
    4565             :                              Oid partCollation)
    4566             : {
    4567             :     Node       *value;
    4568             : 
    4569             :     /* Transform raw parsetree */
    4570       16296 :     value = transformExpr(pstate, val, EXPR_KIND_PARTITION_BOUND);
    4571             : 
    4572             :     /*
    4573             :      * transformExpr() should have already rejected column references,
    4574             :      * subqueries, aggregates, window functions, and SRFs, based on the
    4575             :      * EXPR_KIND_ of a partition bound expression.
    4576             :      */
    4577             :     Assert(!contain_var_clause(value));
    4578             : 
    4579             :     /*
    4580             :      * Coerce to the correct type.  This might cause an explicit coercion step
    4581             :      * to be added on top of the expression, which must be evaluated before
    4582             :      * returning the result to the caller.
    4583             :      */
    4584       16194 :     value = coerce_to_target_type(pstate,
    4585             :                                   value, exprType(value),
    4586             :                                   colType,
    4587             :                                   colTypmod,
    4588             :                                   COERCION_ASSIGNMENT,
    4589             :                                   COERCE_IMPLICIT_CAST,
    4590             :                                   -1);
    4591             : 
    4592       16194 :     if (value == NULL)
    4593           6 :         ereport(ERROR,
    4594             :                 (errcode(ERRCODE_DATATYPE_MISMATCH),
    4595             :                  errmsg("specified value cannot be cast to type %s for column \"%s\"",
    4596             :                         format_type_be(colType), colName),
    4597             :                  parser_errposition(pstate, exprLocation(val))));
    4598             : 
    4599             :     /*
    4600             :      * Evaluate the expression, if needed, assigning the partition key's data
    4601             :      * type and collation to the resulting Const node.
    4602             :      */
    4603       16188 :     if (!IsA(value, Const))
    4604             :     {
    4605         522 :         assign_expr_collations(pstate, value);
    4606         522 :         value = (Node *) expression_planner((Expr *) value);
    4607         522 :         value = (Node *) evaluate_expr((Expr *) value, colType, colTypmod,
    4608             :                                        partCollation);
    4609         522 :         if (!IsA(value, Const))
    4610           0 :             elog(ERROR, "could not evaluate partition bound expression");
    4611             :     }
    4612             :     else
    4613             :     {
    4614             :         /*
    4615             :          * If the expression is already a Const, as is often the case, we can
    4616             :          * skip the rather expensive steps above.  But we still have to insert
    4617             :          * the right collation, since coerce_to_target_type doesn't handle
    4618             :          * that.
    4619             :          */
    4620       15666 :         ((Const *) value)->constcollid = partCollation;
    4621             :     }
    4622             : 
    4623             :     /*
    4624             :      * Attach original expression's parse location to the Const, so that
    4625             :      * that's what will be reported for any later errors related to this
    4626             :      * partition bound.
    4627             :      */
    4628       16188 :     ((Const *) value)->location = exprLocation(val);
    4629             : 
    4630       16188 :     return (Const *) value;
    4631             : }

Generated by: LCOV version 1.14