LCOV - code coverage report
Current view: top level - src/backend/catalog - heap.c (source / functions) Hit Total Coverage
Test: PostgreSQL 17devel Lines: 964 1015 95.0 %
Date: 2024-03-29 10:11:00 Functions: 40 41 97.6 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*-------------------------------------------------------------------------
       2             :  *
       3             :  * heap.c
       4             :  *    code to create and destroy POSTGRES heap relations
       5             :  *
       6             :  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
       7             :  * Portions Copyright (c) 1994, Regents of the University of California
       8             :  *
       9             :  *
      10             :  * IDENTIFICATION
      11             :  *    src/backend/catalog/heap.c
      12             :  *
      13             :  *
      14             :  * INTERFACE ROUTINES
      15             :  *      heap_create()           - Create an uncataloged heap relation
      16             :  *      heap_create_with_catalog() - Create a cataloged relation
      17             :  *      heap_drop_with_catalog() - Removes named relation from catalogs
      18             :  *
      19             :  * NOTES
      20             :  *    this code taken from access/heap/create.c, which contains
      21             :  *    the old heap_create_with_catalog, amcreate, and amdestroy.
      22             :  *    those routines will soon call these routines using the function
      23             :  *    manager,
      24             :  *    just like the poorly named "NewXXX" routines do.  The
      25             :  *    "New" routines are all going to die soon, once and for all!
      26             :  *      -cim 1/13/91
      27             :  *
      28             :  *-------------------------------------------------------------------------
      29             :  */
      30             : #include "postgres.h"
      31             : 
      32             : #include "access/genam.h"
      33             : #include "access/multixact.h"
      34             : #include "access/relation.h"
      35             : #include "access/table.h"
      36             : #include "access/tableam.h"
      37             : #include "catalog/binary_upgrade.h"
      38             : #include "catalog/catalog.h"
      39             : #include "catalog/heap.h"
      40             : #include "catalog/index.h"
      41             : #include "catalog/objectaccess.h"
      42             : #include "catalog/partition.h"
      43             : #include "catalog/pg_am.h"
      44             : #include "catalog/pg_attrdef.h"
      45             : #include "catalog/pg_collation.h"
      46             : #include "catalog/pg_constraint.h"
      47             : #include "catalog/pg_foreign_table.h"
      48             : #include "catalog/pg_inherits.h"
      49             : #include "catalog/pg_namespace.h"
      50             : #include "catalog/pg_opclass.h"
      51             : #include "catalog/pg_partitioned_table.h"
      52             : #include "catalog/pg_statistic.h"
      53             : #include "catalog/pg_subscription_rel.h"
      54             : #include "catalog/pg_tablespace.h"
      55             : #include "catalog/pg_type.h"
      56             : #include "catalog/storage.h"
      57             : #include "commands/tablecmds.h"
      58             : #include "commands/typecmds.h"
      59             : #include "common/int.h"
      60             : #include "miscadmin.h"
      61             : #include "nodes/nodeFuncs.h"
      62             : #include "optimizer/optimizer.h"
      63             : #include "parser/parse_coerce.h"
      64             : #include "parser/parse_collate.h"
      65             : #include "parser/parse_expr.h"
      66             : #include "parser/parse_relation.h"
      67             : #include "parser/parsetree.h"
      68             : #include "partitioning/partdesc.h"
      69             : #include "pgstat.h"
      70             : #include "storage/lmgr.h"
      71             : #include "storage/predicate.h"
      72             : #include "utils/builtins.h"
      73             : #include "utils/fmgroids.h"
      74             : #include "utils/inval.h"
      75             : #include "utils/lsyscache.h"
      76             : #include "utils/syscache.h"
      77             : 
      78             : 
      79             : /* Potentially set by pg_upgrade_support functions */
      80             : Oid         binary_upgrade_next_heap_pg_class_oid = InvalidOid;
      81             : Oid         binary_upgrade_next_toast_pg_class_oid = InvalidOid;
      82             : RelFileNumber binary_upgrade_next_heap_pg_class_relfilenumber = InvalidRelFileNumber;
      83             : RelFileNumber binary_upgrade_next_toast_pg_class_relfilenumber = InvalidRelFileNumber;
      84             : 
      85             : static void AddNewRelationTuple(Relation pg_class_desc,
      86             :                                 Relation new_rel_desc,
      87             :                                 Oid new_rel_oid,
      88             :                                 Oid new_type_oid,
      89             :                                 Oid reloftype,
      90             :                                 Oid relowner,
      91             :                                 char relkind,
      92             :                                 TransactionId relfrozenxid,
      93             :                                 TransactionId relminmxid,
      94             :                                 Datum relacl,
      95             :                                 Datum reloptions);
      96             : static ObjectAddress AddNewRelationType(const char *typeName,
      97             :                                         Oid typeNamespace,
      98             :                                         Oid new_rel_oid,
      99             :                                         char new_rel_kind,
     100             :                                         Oid ownerid,
     101             :                                         Oid new_row_type,
     102             :                                         Oid new_array_type);
     103             : static void RelationRemoveInheritance(Oid relid);
     104             : static Oid  StoreRelCheck(Relation rel, const char *ccname, Node *expr,
     105             :                           bool is_validated, bool is_local, int inhcount,
     106             :                           bool is_no_inherit, bool is_internal);
     107             : static void StoreConstraints(Relation rel, List *cooked_constraints,
     108             :                              bool is_internal);
     109             : static bool MergeWithExistingConstraint(Relation rel, const char *ccname, Node *expr,
     110             :                                         bool allow_merge, bool is_local,
     111             :                                         bool is_initially_valid,
     112             :                                         bool is_no_inherit);
     113             : static void SetRelationNumChecks(Relation rel, int numchecks);
     114             : static Node *cookConstraint(ParseState *pstate,
     115             :                             Node *raw_constraint,
     116             :                             char *relname);
     117             : 
     118             : 
     119             : /* ----------------------------------------------------------------
     120             :  *              XXX UGLY HARD CODED BADNESS FOLLOWS XXX
     121             :  *
     122             :  *      these should all be moved to someplace in the lib/catalog
     123             :  *      module, if not obliterated first.
     124             :  * ----------------------------------------------------------------
     125             :  */
     126             : 
     127             : 
     128             : /*
     129             :  * Note:
     130             :  *      Should the system special case these attributes in the future?
     131             :  *      Advantage:  consume much less space in the ATTRIBUTE relation.
     132             :  *      Disadvantage:  special cases will be all over the place.
     133             :  */
     134             : 
     135             : /*
     136             :  * The initializers below do not include trailing variable length fields,
     137             :  * but that's OK - we're never going to reference anything beyond the
     138             :  * fixed-size portion of the structure anyway.  Fields that can default
     139             :  * to zeroes are also not mentioned.
     140             :  */
     141             : 
     142             : static const FormData_pg_attribute a1 = {
     143             :     .attname = {"ctid"},
     144             :     .atttypid = TIDOID,
     145             :     .attlen = sizeof(ItemPointerData),
     146             :     .attnum = SelfItemPointerAttributeNumber,
     147             :     .attcacheoff = -1,
     148             :     .atttypmod = -1,
     149             :     .attbyval = false,
     150             :     .attalign = TYPALIGN_SHORT,
     151             :     .attstorage = TYPSTORAGE_PLAIN,
     152             :     .attnotnull = true,
     153             :     .attislocal = true,
     154             : };
     155             : 
     156             : static const FormData_pg_attribute a2 = {
     157             :     .attname = {"xmin"},
     158             :     .atttypid = XIDOID,
     159             :     .attlen = sizeof(TransactionId),
     160             :     .attnum = MinTransactionIdAttributeNumber,
     161             :     .attcacheoff = -1,
     162             :     .atttypmod = -1,
     163             :     .attbyval = true,
     164             :     .attalign = TYPALIGN_INT,
     165             :     .attstorage = TYPSTORAGE_PLAIN,
     166             :     .attnotnull = true,
     167             :     .attislocal = true,
     168             : };
     169             : 
     170             : static const FormData_pg_attribute a3 = {
     171             :     .attname = {"cmin"},
     172             :     .atttypid = CIDOID,
     173             :     .attlen = sizeof(CommandId),
     174             :     .attnum = MinCommandIdAttributeNumber,
     175             :     .attcacheoff = -1,
     176             :     .atttypmod = -1,
     177             :     .attbyval = true,
     178             :     .attalign = TYPALIGN_INT,
     179             :     .attstorage = TYPSTORAGE_PLAIN,
     180             :     .attnotnull = true,
     181             :     .attislocal = true,
     182             : };
     183             : 
     184             : static const FormData_pg_attribute a4 = {
     185             :     .attname = {"xmax"},
     186             :     .atttypid = XIDOID,
     187             :     .attlen = sizeof(TransactionId),
     188             :     .attnum = MaxTransactionIdAttributeNumber,
     189             :     .attcacheoff = -1,
     190             :     .atttypmod = -1,
     191             :     .attbyval = true,
     192             :     .attalign = TYPALIGN_INT,
     193             :     .attstorage = TYPSTORAGE_PLAIN,
     194             :     .attnotnull = true,
     195             :     .attislocal = true,
     196             : };
     197             : 
     198             : static const FormData_pg_attribute a5 = {
     199             :     .attname = {"cmax"},
     200             :     .atttypid = CIDOID,
     201             :     .attlen = sizeof(CommandId),
     202             :     .attnum = MaxCommandIdAttributeNumber,
     203             :     .attcacheoff = -1,
     204             :     .atttypmod = -1,
     205             :     .attbyval = true,
     206             :     .attalign = TYPALIGN_INT,
     207             :     .attstorage = TYPSTORAGE_PLAIN,
     208             :     .attnotnull = true,
     209             :     .attislocal = true,
     210             : };
     211             : 
     212             : /*
     213             :  * We decided to call this attribute "tableoid" rather than say
     214             :  * "classoid" on the basis that in the future there may be more than one
     215             :  * table of a particular class/type. In any case table is still the word
     216             :  * used in SQL.
     217             :  */
     218             : static const FormData_pg_attribute a6 = {
     219             :     .attname = {"tableoid"},
     220             :     .atttypid = OIDOID,
     221             :     .attlen = sizeof(Oid),
     222             :     .attnum = TableOidAttributeNumber,
     223             :     .attcacheoff = -1,
     224             :     .atttypmod = -1,
     225             :     .attbyval = true,
     226             :     .attalign = TYPALIGN_INT,
     227             :     .attstorage = TYPSTORAGE_PLAIN,
     228             :     .attnotnull = true,
     229             :     .attislocal = true,
     230             : };
     231             : 
     232             : static const FormData_pg_attribute *const SysAtt[] = {&a1, &a2, &a3, &a4, &a5, &a6};
     233             : 
     234             : /*
     235             :  * This function returns a Form_pg_attribute pointer for a system attribute.
     236             :  * Note that we elog if the presented attno is invalid, which would only
     237             :  * happen if there's a problem upstream.
     238             :  */
     239             : const FormData_pg_attribute *
     240       26930 : SystemAttributeDefinition(AttrNumber attno)
     241             : {
     242       26930 :     if (attno >= 0 || attno < -(int) lengthof(SysAtt))
     243           0 :         elog(ERROR, "invalid system attribute number %d", attno);
     244       26930 :     return SysAtt[-attno - 1];
     245             : }
     246             : 
     247             : /*
     248             :  * If the given name is a system attribute name, return a Form_pg_attribute
     249             :  * pointer for a prototype definition.  If not, return NULL.
     250             :  */
     251             : const FormData_pg_attribute *
     252      287602 : SystemAttributeByName(const char *attname)
     253             : {
     254             :     int         j;
     255             : 
     256     1918756 :     for (j = 0; j < (int) lengthof(SysAtt); j++)
     257             :     {
     258     1658124 :         const FormData_pg_attribute *att = SysAtt[j];
     259             : 
     260     1658124 :         if (strcmp(NameStr(att->attname), attname) == 0)
     261       26970 :             return att;
     262             :     }
     263             : 
     264      260632 :     return NULL;
     265             : }
     266             : 
     267             : 
     268             : /* ----------------------------------------------------------------
     269             :  *              XXX END OF UGLY HARD CODED BADNESS XXX
     270             :  * ---------------------------------------------------------------- */
     271             : 
     272             : 
     273             : /* ----------------------------------------------------------------
     274             :  *      heap_create     - Create an uncataloged heap relation
     275             :  *
     276             :  *      Note API change: the caller must now always provide the OID
     277             :  *      to use for the relation.  The relfilenumber may be (and in
     278             :  *      the simplest cases is) left unspecified.
     279             :  *
     280             :  *      create_storage indicates whether or not to create the storage.
     281             :  *      However, even if create_storage is true, no storage will be
     282             :  *      created if the relkind is one that doesn't have storage.
     283             :  *
     284             :  *      rel->rd_rel is initialized by RelationBuildLocalRelation,
     285             :  *      and is mostly zeroes at return.
     286             :  * ----------------------------------------------------------------
     287             :  */
     288             : Relation
     289      115710 : heap_create(const char *relname,
     290             :             Oid relnamespace,
     291             :             Oid reltablespace,
     292             :             Oid relid,
     293             :             RelFileNumber relfilenumber,
     294             :             Oid accessmtd,
     295             :             TupleDesc tupDesc,
     296             :             char relkind,
     297             :             char relpersistence,
     298             :             bool shared_relation,
     299             :             bool mapped_relation,
     300             :             bool allow_system_table_mods,
     301             :             TransactionId *relfrozenxid,
     302             :             MultiXactId *relminmxid,
     303             :             bool create_storage)
     304             : {
     305             :     Relation    rel;
     306             : 
     307             :     /* The caller must have provided an OID for the relation. */
     308             :     Assert(OidIsValid(relid));
     309             : 
     310             :     /*
     311             :      * Don't allow creating relations in pg_catalog directly, even though it
     312             :      * is allowed to move user defined relations there. Semantics with search
     313             :      * paths including pg_catalog are too confusing for now.
     314             :      *
     315             :      * But allow creating indexes on relations in pg_catalog even if
     316             :      * allow_system_table_mods = off, upper layers already guarantee it's on a
     317             :      * user defined relation, not a system one.
     318             :      */
     319      181374 :     if (!allow_system_table_mods &&
     320      141254 :         ((IsCatalogNamespace(relnamespace) && relkind != RELKIND_INDEX) ||
     321       65656 :          IsToastNamespace(relnamespace)) &&
     322           8 :         IsNormalProcessingMode())
     323           8 :         ereport(ERROR,
     324             :                 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
     325             :                  errmsg("permission denied to create \"%s.%s\"",
     326             :                         get_namespace_name(relnamespace), relname),
     327             :                  errdetail("System catalog modifications are currently disallowed.")));
     328             : 
     329      115702 :     *relfrozenxid = InvalidTransactionId;
     330      115702 :     *relminmxid = InvalidMultiXactId;
     331             : 
     332             :     /*
     333             :      * Force reltablespace to zero if the relation kind does not support
     334             :      * tablespaces.  This is mainly just for cleanliness' sake.
     335             :      */
     336      115702 :     if (!RELKIND_HAS_TABLESPACE(relkind))
     337       16044 :         reltablespace = InvalidOid;
     338             : 
     339             :     /* Don't create storage for relkinds without physical storage. */
     340      115702 :     if (!RELKIND_HAS_STORAGE(relkind))
     341       20796 :         create_storage = false;
     342             :     else
     343             :     {
     344             :         /*
     345             :          * If relfilenumber is unspecified by the caller then create storage
     346             :          * with oid same as relid.
     347             :          */
     348       94906 :         if (!RelFileNumberIsValid(relfilenumber))
     349       92038 :             relfilenumber = relid;
     350             :     }
     351             : 
     352             :     /*
     353             :      * Never allow a pg_class entry to explicitly specify the database's
     354             :      * default tablespace in reltablespace; force it to zero instead. This
     355             :      * ensures that if the database is cloned with a different default
     356             :      * tablespace, the pg_class entry will still match where CREATE DATABASE
     357             :      * will put the physically copied relation.
     358             :      *
     359             :      * Yes, this is a bit of a hack.
     360             :      */
     361      115702 :     if (reltablespace == MyDatabaseTableSpace)
     362           6 :         reltablespace = InvalidOid;
     363             : 
     364             :     /*
     365             :      * build the relcache entry.
     366             :      */
     367      115702 :     rel = RelationBuildLocalRelation(relname,
     368             :                                      relnamespace,
     369             :                                      tupDesc,
     370             :                                      relid,
     371             :                                      accessmtd,
     372             :                                      relfilenumber,
     373             :                                      reltablespace,
     374             :                                      shared_relation,
     375             :                                      mapped_relation,
     376             :                                      relpersistence,
     377             :                                      relkind);
     378             : 
     379             :     /*
     380             :      * Have the storage manager create the relation's disk file, if needed.
     381             :      *
     382             :      * For tables, the AM callback creates both the main and the init fork.
     383             :      * For others, only the main fork is created; the other forks will be
     384             :      * created on demand.
     385             :      */
     386      115702 :     if (create_storage)
     387             :     {
     388       94834 :         if (RELKIND_HAS_TABLE_AM(rel->rd_rel->relkind))
     389       52914 :             table_relation_set_new_filelocator(rel, &rel->rd_locator,
     390             :                                                relpersistence,
     391             :                                                relfrozenxid, relminmxid);
     392       41920 :         else if (RELKIND_HAS_STORAGE(rel->rd_rel->relkind))
     393       41920 :             RelationCreateStorage(rel->rd_locator, relpersistence, true);
     394             :         else
     395             :             Assert(false);
     396             :     }
     397             : 
     398             :     /*
     399             :      * If a tablespace is specified, removal of that tablespace is normally
     400             :      * protected by the existence of a physical file; but for relations with
     401             :      * no files, add a pg_shdepend entry to account for that.
     402             :      */
     403      115702 :     if (!create_storage && reltablespace != InvalidOid)
     404         106 :         recordDependencyOnTablespace(RelationRelationId, relid,
     405             :                                      reltablespace);
     406             : 
     407             :     /* ensure that stats are dropped if transaction aborts */
     408      115702 :     pgstat_create_relation(rel);
     409             : 
     410      115702 :     return rel;
     411             : }
     412             : 
     413             : /* ----------------------------------------------------------------
     414             :  *      heap_create_with_catalog        - Create a cataloged relation
     415             :  *
     416             :  *      this is done in multiple steps:
     417             :  *
     418             :  *      1) CheckAttributeNamesTypes() is used to make certain the tuple
     419             :  *         descriptor contains a valid set of attribute names and types
     420             :  *
     421             :  *      2) pg_class is opened and get_relname_relid()
     422             :  *         performs a scan to ensure that no relation with the
     423             :  *         same name already exists.
     424             :  *
     425             :  *      3) heap_create() is called to create the new relation on disk.
     426             :  *
     427             :  *      4) TypeCreate() is called to define a new type corresponding
     428             :  *         to the new relation.
     429             :  *
     430             :  *      5) AddNewRelationTuple() is called to register the
     431             :  *         relation in pg_class.
     432             :  *
     433             :  *      6) AddNewAttributeTuples() is called to register the
     434             :  *         new relation's schema in pg_attribute.
     435             :  *
     436             :  *      7) StoreConstraints is called ()        - vadim 08/22/97
     437             :  *
     438             :  *      8) the relations are closed and the new relation's oid
     439             :  *         is returned.
     440             :  *
     441             :  * ----------------------------------------------------------------
     442             :  */
     443             : 
     444             : /* --------------------------------
     445             :  *      CheckAttributeNamesTypes
     446             :  *
     447             :  *      this is used to make certain the tuple descriptor contains a
     448             :  *      valid set of attribute names and datatypes.  a problem simply
     449             :  *      generates ereport(ERROR) which aborts the current transaction.
     450             :  *
     451             :  *      relkind is the relkind of the relation to be created.
     452             :  *      flags controls which datatypes are allowed, cf CheckAttributeType.
     453             :  * --------------------------------
     454             :  */
     455             : void
     456       74030 : CheckAttributeNamesTypes(TupleDesc tupdesc, char relkind,
     457             :                          int flags)
     458             : {
     459             :     int         i;
     460             :     int         j;
     461       74030 :     int         natts = tupdesc->natts;
     462             : 
     463             :     /* Sanity check on column count */
     464       74030 :     if (natts < 0 || natts > MaxHeapAttributeNumber)
     465           0 :         ereport(ERROR,
     466             :                 (errcode(ERRCODE_TOO_MANY_COLUMNS),
     467             :                  errmsg("tables can have at most %d columns",
     468             :                         MaxHeapAttributeNumber)));
     469             : 
     470             :     /*
     471             :      * first check for collision with system attribute names
     472             :      *
     473             :      * Skip this for a view or type relation, since those don't have system
     474             :      * attributes.
     475             :      */
     476       74030 :     if (relkind != RELKIND_VIEW && relkind != RELKIND_COMPOSITE_TYPE)
     477             :     {
     478      239342 :         for (i = 0; i < natts; i++)
     479             :         {
     480      180074 :             Form_pg_attribute attr = TupleDescAttr(tupdesc, i);
     481             : 
     482      180074 :             if (SystemAttributeByName(NameStr(attr->attname)) != NULL)
     483           0 :                 ereport(ERROR,
     484             :                         (errcode(ERRCODE_DUPLICATE_COLUMN),
     485             :                          errmsg("column name \"%s\" conflicts with a system column name",
     486             :                                 NameStr(attr->attname))));
     487             :         }
     488             :     }
     489             : 
     490             :     /*
     491             :      * next check for repeated attribute names
     492             :      */
     493      302780 :     for (i = 1; i < natts; i++)
     494             :     {
     495     6508080 :         for (j = 0; j < i; j++)
     496             :         {
     497     6279330 :             if (strcmp(NameStr(TupleDescAttr(tupdesc, j)->attname),
     498     6279330 :                        NameStr(TupleDescAttr(tupdesc, i)->attname)) == 0)
     499           0 :                 ereport(ERROR,
     500             :                         (errcode(ERRCODE_DUPLICATE_COLUMN),
     501             :                          errmsg("column name \"%s\" specified more than once",
     502             :                                 NameStr(TupleDescAttr(tupdesc, j)->attname))));
     503             :         }
     504             :     }
     505             : 
     506             :     /*
     507             :      * next check the attribute types
     508             :      */
     509      376442 :     for (i = 0; i < natts; i++)
     510             :     {
     511      302426 :         CheckAttributeType(NameStr(TupleDescAttr(tupdesc, i)->attname),
     512             :                            TupleDescAttr(tupdesc, i)->atttypid,
     513             :                            TupleDescAttr(tupdesc, i)->attcollation,
     514             :                            NIL, /* assume we're creating a new rowtype */
     515             :                            flags);
     516             :     }
     517       74016 : }
     518             : 
     519             : /* --------------------------------
     520             :  *      CheckAttributeType
     521             :  *
     522             :  *      Verify that the proposed datatype of an attribute is legal.
     523             :  *      This is needed mainly because there are types (and pseudo-types)
     524             :  *      in the catalogs that we do not support as elements of real tuples.
     525             :  *      We also check some other properties required of a table column.
     526             :  *
     527             :  * If the attribute is being proposed for addition to an existing table or
     528             :  * composite type, pass a one-element list of the rowtype OID as
     529             :  * containing_rowtypes.  When checking a to-be-created rowtype, it's
     530             :  * sufficient to pass NIL, because there could not be any recursive reference
     531             :  * to a not-yet-existing rowtype.
     532             :  *
     533             :  * flags is a bitmask controlling which datatypes we allow.  For the most
     534             :  * part, pseudo-types are disallowed as attribute types, but there are some
     535             :  * exceptions: ANYARRAYOID, RECORDOID, and RECORDARRAYOID can be allowed
     536             :  * in some cases.  (This works because values of those type classes are
     537             :  * self-identifying to some extent.  However, RECORDOID and RECORDARRAYOID
     538             :  * are reliably identifiable only within a session, since the identity info
     539             :  * may use a typmod that is only locally assigned.  The caller is expected
     540             :  * to know whether these cases are safe.)
     541             :  *
     542             :  * flags can also control the phrasing of the error messages.  If
     543             :  * CHKATYPE_IS_PARTKEY is specified, "attname" should be a partition key
     544             :  * column number as text, not a real column name.
     545             :  * --------------------------------
     546             :  */
     547             : void
     548      373206 : CheckAttributeType(const char *attname,
     549             :                    Oid atttypid, Oid attcollation,
     550             :                    List *containing_rowtypes,
     551             :                    int flags)
     552             : {
     553      373206 :     char        att_typtype = get_typtype(atttypid);
     554             :     Oid         att_typelem;
     555             : 
     556             :     /* since this function recurses, it could be driven to stack overflow */
     557      373206 :     check_stack_depth();
     558             : 
     559      373206 :     if (att_typtype == TYPTYPE_PSEUDO)
     560             :     {
     561             :         /*
     562             :          * We disallow pseudo-type columns, with the exception of ANYARRAY,
     563             :          * RECORD, and RECORD[] when the caller says that those are OK.
     564             :          *
     565             :          * We don't need to worry about recursive containment for RECORD and
     566             :          * RECORD[] because (a) no named composite type should be allowed to
     567             :          * contain those, and (b) two "anonymous" record types couldn't be
     568             :          * considered to be the same type, so infinite recursion isn't
     569             :          * possible.
     570             :          */
     571        1494 :         if (!((atttypid == ANYARRAYOID && (flags & CHKATYPE_ANYARRAY)) ||
     572          24 :               (atttypid == RECORDOID && (flags & CHKATYPE_ANYRECORD)) ||
     573           6 :               (atttypid == RECORDARRAYOID && (flags & CHKATYPE_ANYRECORD))))
     574             :         {
     575          32 :             if (flags & CHKATYPE_IS_PARTKEY)
     576          12 :                 ereport(ERROR,
     577             :                         (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
     578             :                 /* translator: first %s is an integer not a name */
     579             :                          errmsg("partition key column %s has pseudo-type %s",
     580             :                                 attname, format_type_be(atttypid))));
     581             :             else
     582          20 :                 ereport(ERROR,
     583             :                         (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
     584             :                          errmsg("column \"%s\" has pseudo-type %s",
     585             :                                 attname, format_type_be(atttypid))));
     586             :         }
     587             :     }
     588      371724 :     else if (att_typtype == TYPTYPE_DOMAIN)
     589             :     {
     590             :         /*
     591             :          * If it's a domain, recurse to check its base type.
     592             :          */
     593       52540 :         CheckAttributeType(attname, getBaseType(atttypid), attcollation,
     594             :                            containing_rowtypes,
     595             :                            flags);
     596             :     }
     597      319184 :     else if (att_typtype == TYPTYPE_COMPOSITE)
     598             :     {
     599             :         /*
     600             :          * For a composite type, recurse into its attributes.
     601             :          */
     602             :         Relation    relation;
     603             :         TupleDesc   tupdesc;
     604             :         int         i;
     605             : 
     606             :         /*
     607             :          * Check for self-containment.  Eventually we might be able to allow
     608             :          * this (just return without complaint, if so) but it's not clear how
     609             :          * many other places would require anti-recursion defenses before it
     610             :          * would be safe to allow tables to contain their own rowtype.
     611             :          */
     612         682 :         if (list_member_oid(containing_rowtypes, atttypid))
     613          36 :             ereport(ERROR,
     614             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
     615             :                      errmsg("composite type %s cannot be made a member of itself",
     616             :                             format_type_be(atttypid))));
     617             : 
     618         646 :         containing_rowtypes = lappend_oid(containing_rowtypes, atttypid);
     619             : 
     620         646 :         relation = relation_open(get_typ_typrelid(atttypid), AccessShareLock);
     621             : 
     622         646 :         tupdesc = RelationGetDescr(relation);
     623             : 
     624        4436 :         for (i = 0; i < tupdesc->natts; i++)
     625             :         {
     626        3802 :             Form_pg_attribute attr = TupleDescAttr(tupdesc, i);
     627             : 
     628        3802 :             if (attr->attisdropped)
     629           2 :                 continue;
     630        3800 :             CheckAttributeType(NameStr(attr->attname),
     631             :                                attr->atttypid, attr->attcollation,
     632             :                                containing_rowtypes,
     633             :                                flags & ~CHKATYPE_IS_PARTKEY);
     634             :         }
     635             : 
     636         634 :         relation_close(relation, AccessShareLock);
     637             : 
     638         634 :         containing_rowtypes = list_delete_last(containing_rowtypes);
     639             :     }
     640      318502 :     else if (att_typtype == TYPTYPE_RANGE)
     641             :     {
     642             :         /*
     643             :          * If it's a range, recurse to check its subtype.
     644             :          */
     645        1568 :         CheckAttributeType(attname, get_range_subtype(atttypid),
     646             :                            get_range_collation(atttypid),
     647             :                            containing_rowtypes,
     648             :                            flags);
     649             :     }
     650      316934 :     else if (OidIsValid((att_typelem = get_element_type(atttypid))))
     651             :     {
     652             :         /*
     653             :          * Must recurse into array types, too, in case they are composite.
     654             :          */
     655        8220 :         CheckAttributeType(attname, att_typelem, attcollation,
     656             :                            containing_rowtypes,
     657             :                            flags);
     658             :     }
     659             : 
     660             :     /*
     661             :      * This might not be strictly invalid per SQL standard, but it is pretty
     662             :      * useless, and it cannot be dumped, so we must disallow it.
     663             :      */
     664      373102 :     if (!OidIsValid(attcollation) && type_is_collatable(atttypid))
     665             :     {
     666           0 :         if (flags & CHKATYPE_IS_PARTKEY)
     667           0 :             ereport(ERROR,
     668             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
     669             :             /* translator: first %s is an integer not a name */
     670             :                      errmsg("no collation was derived for partition key column %s with collatable type %s",
     671             :                             attname, format_type_be(atttypid)),
     672             :                      errhint("Use the COLLATE clause to set the collation explicitly.")));
     673             :         else
     674           0 :             ereport(ERROR,
     675             :                     (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
     676             :                      errmsg("no collation was derived for column \"%s\" with collatable type %s",
     677             :                             attname, format_type_be(atttypid)),
     678             :                      errhint("Use the COLLATE clause to set the collation explicitly.")));
     679             :     }
     680      373102 : }
     681             : 
     682             : /*
     683             :  * InsertPgAttributeTuples
     684             :  *      Construct and insert a set of tuples in pg_attribute.
     685             :  *
     686             :  * Caller has already opened and locked pg_attribute.  tupdesc contains the
     687             :  * attributes to insert.  attcacheoff is always initialized to -1.
     688             :  * tupdesc_extra supplies the values for certain variable-length/nullable
     689             :  * pg_attribute fields and must contain the same number of elements as tupdesc
     690             :  * or be NULL.  The other variable-length fields of pg_attribute are always
     691             :  * initialized to null values.
     692             :  *
     693             :  * indstate is the index state for CatalogTupleInsertWithInfo.  It can be
     694             :  * passed as NULL, in which case we'll fetch the necessary info.  (Don't do
     695             :  * this when inserting multiple attributes, because it's a tad more
     696             :  * expensive.)
     697             :  *
     698             :  * new_rel_oid is the relation OID assigned to the attributes inserted.
     699             :  * If set to InvalidOid, the relation OID from tupdesc is used instead.
     700             :  */
     701             : void
     702      177038 : InsertPgAttributeTuples(Relation pg_attribute_rel,
     703             :                         TupleDesc tupdesc,
     704             :                         Oid new_rel_oid,
     705             :                         const FormExtraData_pg_attribute tupdesc_extra[],
     706             :                         CatalogIndexState indstate)
     707             : {
     708             :     TupleTableSlot **slot;
     709             :     TupleDesc   td;
     710             :     int         nslots;
     711      177038 :     int         natts = 0;
     712      177038 :     int         slotCount = 0;
     713      177038 :     bool        close_index = false;
     714             : 
     715      177038 :     td = RelationGetDescr(pg_attribute_rel);
     716             : 
     717             :     /* Initialize the number of slots to use */
     718      177038 :     nslots = Min(tupdesc->natts,
     719             :                  (MAX_CATALOG_MULTI_INSERT_BYTES / sizeof(FormData_pg_attribute)));
     720      177038 :     slot = palloc(sizeof(TupleTableSlot *) * nslots);
     721      900248 :     for (int i = 0; i < nslots; i++)
     722      723210 :         slot[i] = MakeSingleTupleTableSlot(td, &TTSOpsHeapTuple);
     723             : 
     724      904024 :     while (natts < tupdesc->natts)
     725             :     {
     726      726986 :         Form_pg_attribute attrs = TupleDescAttr(tupdesc, natts);
     727      726986 :         const FormExtraData_pg_attribute *attrs_extra = tupdesc_extra ? &tupdesc_extra[natts] : NULL;
     728             : 
     729      726986 :         ExecClearTuple(slot[slotCount]);
     730             : 
     731      726986 :         memset(slot[slotCount]->tts_isnull, false,
     732      726986 :                slot[slotCount]->tts_tupleDescriptor->natts * sizeof(bool));
     733             : 
     734      726986 :         if (new_rel_oid != InvalidOid)
     735      658442 :             slot[slotCount]->tts_values[Anum_pg_attribute_attrelid - 1] = ObjectIdGetDatum(new_rel_oid);
     736             :         else
     737       68544 :             slot[slotCount]->tts_values[Anum_pg_attribute_attrelid - 1] = ObjectIdGetDatum(attrs->attrelid);
     738             : 
     739      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attname - 1] = NameGetDatum(&attrs->attname);
     740      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_atttypid - 1] = ObjectIdGetDatum(attrs->atttypid);
     741      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attlen - 1] = Int16GetDatum(attrs->attlen);
     742      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attnum - 1] = Int16GetDatum(attrs->attnum);
     743      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attcacheoff - 1] = Int32GetDatum(-1);
     744      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_atttypmod - 1] = Int32GetDatum(attrs->atttypmod);
     745      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attndims - 1] = Int16GetDatum(attrs->attndims);
     746      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attbyval - 1] = BoolGetDatum(attrs->attbyval);
     747      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attalign - 1] = CharGetDatum(attrs->attalign);
     748      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attstorage - 1] = CharGetDatum(attrs->attstorage);
     749      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attcompression - 1] = CharGetDatum(attrs->attcompression);
     750      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attnotnull - 1] = BoolGetDatum(attrs->attnotnull);
     751      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_atthasdef - 1] = BoolGetDatum(attrs->atthasdef);
     752      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_atthasmissing - 1] = BoolGetDatum(attrs->atthasmissing);
     753      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attidentity - 1] = CharGetDatum(attrs->attidentity);
     754      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attgenerated - 1] = CharGetDatum(attrs->attgenerated);
     755      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attisdropped - 1] = BoolGetDatum(attrs->attisdropped);
     756      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attislocal - 1] = BoolGetDatum(attrs->attislocal);
     757      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attinhcount - 1] = Int16GetDatum(attrs->attinhcount);
     758      726986 :         slot[slotCount]->tts_values[Anum_pg_attribute_attcollation - 1] = ObjectIdGetDatum(attrs->attcollation);
     759      726986 :         if (attrs_extra)
     760             :         {
     761       37152 :             slot[slotCount]->tts_values[Anum_pg_attribute_attstattarget - 1] = attrs_extra->attstattarget.value;
     762       37152 :             slot[slotCount]->tts_isnull[Anum_pg_attribute_attstattarget - 1] = attrs_extra->attstattarget.isnull;
     763             : 
     764       37152 :             slot[slotCount]->tts_values[Anum_pg_attribute_attoptions - 1] = attrs_extra->attoptions.value;
     765       37152 :             slot[slotCount]->tts_isnull[Anum_pg_attribute_attoptions - 1] = attrs_extra->attoptions.isnull;
     766             :         }
     767             :         else
     768             :         {
     769      689834 :             slot[slotCount]->tts_isnull[Anum_pg_attribute_attstattarget - 1] = true;
     770      689834 :             slot[slotCount]->tts_isnull[Anum_pg_attribute_attoptions - 1] = true;
     771             :         }
     772             : 
     773             :         /*
     774             :          * The remaining fields are not set for new columns.
     775             :          */
     776      726986 :         slot[slotCount]->tts_isnull[Anum_pg_attribute_attacl - 1] = true;
     777      726986 :         slot[slotCount]->tts_isnull[Anum_pg_attribute_attfdwoptions - 1] = true;
     778      726986 :         slot[slotCount]->tts_isnull[Anum_pg_attribute_attmissingval - 1] = true;
     779             : 
     780      726986 :         ExecStoreVirtualTuple(slot[slotCount]);
     781      726986 :         slotCount++;
     782             : 
     783             :         /*
     784             :          * If slots are full or the end of processing has been reached, insert
     785             :          * a batch of tuples.
     786             :          */
     787      726986 :         if (slotCount == nslots || natts == tupdesc->natts - 1)
     788             :         {
     789             :             /* fetch index info only when we know we need it */
     790      176698 :             if (!indstate)
     791             :             {
     792        2406 :                 indstate = CatalogOpenIndexes(pg_attribute_rel);
     793        2406 :                 close_index = true;
     794             :             }
     795             : 
     796             :             /* insert the new tuples and update the indexes */
     797      176698 :             CatalogTuplesMultiInsertWithInfo(pg_attribute_rel, slot, slotCount,
     798             :                                              indstate);
     799      176698 :             slotCount = 0;
     800             :         }
     801             : 
     802      726986 :         natts++;
     803             :     }
     804             : 
     805      177038 :     if (close_index)
     806        2406 :         CatalogCloseIndexes(indstate);
     807      900248 :     for (int i = 0; i < nslots; i++)
     808      723210 :         ExecDropSingleTupleTableSlot(slot[i]);
     809      177038 :     pfree(slot);
     810      177038 : }
     811             : 
     812             : /* --------------------------------
     813             :  *      AddNewAttributeTuples
     814             :  *
     815             :  *      this registers the new relation's schema by adding
     816             :  *      tuples to pg_attribute.
     817             :  * --------------------------------
     818             :  */
     819             : static void
     820       73232 : AddNewAttributeTuples(Oid new_rel_oid,
     821             :                       TupleDesc tupdesc,
     822             :                       char relkind)
     823             : {
     824             :     Relation    rel;
     825             :     CatalogIndexState indstate;
     826       73232 :     int         natts = tupdesc->natts;
     827             :     ObjectAddress myself,
     828             :                 referenced;
     829             : 
     830             :     /*
     831             :      * open pg_attribute and its indexes.
     832             :      */
     833       73232 :     rel = table_open(AttributeRelationId, RowExclusiveLock);
     834             : 
     835       73232 :     indstate = CatalogOpenIndexes(rel);
     836             : 
     837       73232 :     InsertPgAttributeTuples(rel, tupdesc, new_rel_oid, NULL, indstate);
     838             : 
     839             :     /* add dependencies on their datatypes and collations */
     840      373768 :     for (int i = 0; i < natts; i++)
     841             :     {
     842             :         /* Add dependency info */
     843      300536 :         ObjectAddressSubSet(myself, RelationRelationId, new_rel_oid, i + 1);
     844      300536 :         ObjectAddressSet(referenced, TypeRelationId,
     845             :                          tupdesc->attrs[i].atttypid);
     846      300536 :         recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
     847             : 
     848             :         /* The default collation is pinned, so don't bother recording it */
     849      300536 :         if (OidIsValid(tupdesc->attrs[i].attcollation) &&
     850       90582 :             tupdesc->attrs[i].attcollation != DEFAULT_COLLATION_OID)
     851             :         {
     852       64804 :             ObjectAddressSet(referenced, CollationRelationId,
     853             :                              tupdesc->attrs[i].attcollation);
     854       64804 :             recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
     855             :         }
     856             :     }
     857             : 
     858             :     /*
     859             :      * Next we add the system attributes.  Skip all for a view or type
     860             :      * relation.  We don't bother with making datatype dependencies here,
     861             :      * since presumably all these types are pinned.
     862             :      */
     863       73232 :     if (relkind != RELKIND_VIEW && relkind != RELKIND_COMPOSITE_TYPE)
     864             :     {
     865             :         TupleDesc   td;
     866             : 
     867       59250 :         td = CreateTupleDesc(lengthof(SysAtt), (FormData_pg_attribute **) &SysAtt);
     868             : 
     869       59250 :         InsertPgAttributeTuples(rel, td, new_rel_oid, NULL, indstate);
     870       59250 :         FreeTupleDesc(td);
     871             :     }
     872             : 
     873             :     /*
     874             :      * clean up
     875             :      */
     876       73232 :     CatalogCloseIndexes(indstate);
     877             : 
     878       73232 :     table_close(rel, RowExclusiveLock);
     879       73232 : }
     880             : 
     881             : /* --------------------------------
     882             :  *      InsertPgClassTuple
     883             :  *
     884             :  *      Construct and insert a new tuple in pg_class.
     885             :  *
     886             :  * Caller has already opened and locked pg_class.
     887             :  * Tuple data is taken from new_rel_desc->rd_rel, except for the
     888             :  * variable-width fields which are not present in a cached reldesc.
     889             :  * relacl and reloptions are passed in Datum form (to avoid having
     890             :  * to reference the data types in heap.h).  Pass (Datum) 0 to set them
     891             :  * to NULL.
     892             :  * --------------------------------
     893             :  */
     894             : void
     895      115382 : InsertPgClassTuple(Relation pg_class_desc,
     896             :                    Relation new_rel_desc,
     897             :                    Oid new_rel_oid,
     898             :                    Datum relacl,
     899             :                    Datum reloptions)
     900             : {
     901      115382 :     Form_pg_class rd_rel = new_rel_desc->rd_rel;
     902             :     Datum       values[Natts_pg_class];
     903             :     bool        nulls[Natts_pg_class];
     904             :     HeapTuple   tup;
     905             : 
     906             :     /* This is a tad tedious, but way cleaner than what we used to do... */
     907      115382 :     memset(values, 0, sizeof(values));
     908      115382 :     memset(nulls, false, sizeof(nulls));
     909             : 
     910      115382 :     values[Anum_pg_class_oid - 1] = ObjectIdGetDatum(new_rel_oid);
     911      115382 :     values[Anum_pg_class_relname - 1] = NameGetDatum(&rd_rel->relname);
     912      115382 :     values[Anum_pg_class_relnamespace - 1] = ObjectIdGetDatum(rd_rel->relnamespace);
     913      115382 :     values[Anum_pg_class_reltype - 1] = ObjectIdGetDatum(rd_rel->reltype);
     914      115382 :     values[Anum_pg_class_reloftype - 1] = ObjectIdGetDatum(rd_rel->reloftype);
     915      115382 :     values[Anum_pg_class_relowner - 1] = ObjectIdGetDatum(rd_rel->relowner);
     916      115382 :     values[Anum_pg_class_relam - 1] = ObjectIdGetDatum(rd_rel->relam);
     917      115382 :     values[Anum_pg_class_relfilenode - 1] = ObjectIdGetDatum(rd_rel->relfilenode);
     918      115382 :     values[Anum_pg_class_reltablespace - 1] = ObjectIdGetDatum(rd_rel->reltablespace);
     919      115382 :     values[Anum_pg_class_relpages - 1] = Int32GetDatum(rd_rel->relpages);
     920      115382 :     values[Anum_pg_class_reltuples - 1] = Float4GetDatum(rd_rel->reltuples);
     921      115382 :     values[Anum_pg_class_relallvisible - 1] = Int32GetDatum(rd_rel->relallvisible);
     922      115382 :     values[Anum_pg_class_reltoastrelid - 1] = ObjectIdGetDatum(rd_rel->reltoastrelid);
     923      115382 :     values[Anum_pg_class_relhasindex - 1] = BoolGetDatum(rd_rel->relhasindex);
     924      115382 :     values[Anum_pg_class_relisshared - 1] = BoolGetDatum(rd_rel->relisshared);
     925      115382 :     values[Anum_pg_class_relpersistence - 1] = CharGetDatum(rd_rel->relpersistence);
     926      115382 :     values[Anum_pg_class_relkind - 1] = CharGetDatum(rd_rel->relkind);
     927      115382 :     values[Anum_pg_class_relnatts - 1] = Int16GetDatum(rd_rel->relnatts);
     928      115382 :     values[Anum_pg_class_relchecks - 1] = Int16GetDatum(rd_rel->relchecks);
     929      115382 :     values[Anum_pg_class_relhasrules - 1] = BoolGetDatum(rd_rel->relhasrules);
     930      115382 :     values[Anum_pg_class_relhastriggers - 1] = BoolGetDatum(rd_rel->relhastriggers);
     931      115382 :     values[Anum_pg_class_relrowsecurity - 1] = BoolGetDatum(rd_rel->relrowsecurity);
     932      115382 :     values[Anum_pg_class_relforcerowsecurity - 1] = BoolGetDatum(rd_rel->relforcerowsecurity);
     933      115382 :     values[Anum_pg_class_relhassubclass - 1] = BoolGetDatum(rd_rel->relhassubclass);
     934      115382 :     values[Anum_pg_class_relispopulated - 1] = BoolGetDatum(rd_rel->relispopulated);
     935      115382 :     values[Anum_pg_class_relreplident - 1] = CharGetDatum(rd_rel->relreplident);
     936      115382 :     values[Anum_pg_class_relispartition - 1] = BoolGetDatum(rd_rel->relispartition);
     937      115382 :     values[Anum_pg_class_relrewrite - 1] = ObjectIdGetDatum(rd_rel->relrewrite);
     938      115382 :     values[Anum_pg_class_relfrozenxid - 1] = TransactionIdGetDatum(rd_rel->relfrozenxid);
     939      115382 :     values[Anum_pg_class_relminmxid - 1] = MultiXactIdGetDatum(rd_rel->relminmxid);
     940      115382 :     if (relacl != (Datum) 0)
     941         132 :         values[Anum_pg_class_relacl - 1] = relacl;
     942             :     else
     943      115250 :         nulls[Anum_pg_class_relacl - 1] = true;
     944      115382 :     if (reloptions != (Datum) 0)
     945        1386 :         values[Anum_pg_class_reloptions - 1] = reloptions;
     946             :     else
     947      113996 :         nulls[Anum_pg_class_reloptions - 1] = true;
     948             : 
     949             :     /* relpartbound is set by updating this tuple, if necessary */
     950      115382 :     nulls[Anum_pg_class_relpartbound - 1] = true;
     951             : 
     952      115382 :     tup = heap_form_tuple(RelationGetDescr(pg_class_desc), values, nulls);
     953             : 
     954             :     /* finally insert the new tuple, update the indexes, and clean up */
     955      115382 :     CatalogTupleInsert(pg_class_desc, tup);
     956             : 
     957      115382 :     heap_freetuple(tup);
     958      115382 : }
     959             : 
     960             : /* --------------------------------
     961             :  *      AddNewRelationTuple
     962             :  *
     963             :  *      this registers the new relation in the catalogs by
     964             :  *      adding a tuple to pg_class.
     965             :  * --------------------------------
     966             :  */
     967             : static void
     968       73232 : AddNewRelationTuple(Relation pg_class_desc,
     969             :                     Relation new_rel_desc,
     970             :                     Oid new_rel_oid,
     971             :                     Oid new_type_oid,
     972             :                     Oid reloftype,
     973             :                     Oid relowner,
     974             :                     char relkind,
     975             :                     TransactionId relfrozenxid,
     976             :                     TransactionId relminmxid,
     977             :                     Datum relacl,
     978             :                     Datum reloptions)
     979             : {
     980             :     Form_pg_class new_rel_reltup;
     981             : 
     982             :     /*
     983             :      * first we update some of the information in our uncataloged relation's
     984             :      * relation descriptor.
     985             :      */
     986       73232 :     new_rel_reltup = new_rel_desc->rd_rel;
     987             : 
     988             :     /* The relation is empty */
     989       73232 :     new_rel_reltup->relpages = 0;
     990       73232 :     new_rel_reltup->reltuples = -1;
     991       73232 :     new_rel_reltup->relallvisible = 0;
     992             : 
     993             :     /* Sequences always have a known size */
     994       73232 :     if (relkind == RELKIND_SEQUENCE)
     995             :     {
     996        1644 :         new_rel_reltup->relpages = 1;
     997        1644 :         new_rel_reltup->reltuples = 1;
     998             :     }
     999             : 
    1000       73232 :     new_rel_reltup->relfrozenxid = relfrozenxid;
    1001       73232 :     new_rel_reltup->relminmxid = relminmxid;
    1002       73232 :     new_rel_reltup->relowner = relowner;
    1003       73232 :     new_rel_reltup->reltype = new_type_oid;
    1004       73232 :     new_rel_reltup->reloftype = reloftype;
    1005             : 
    1006             :     /* relispartition is always set by updating this tuple later */
    1007       73232 :     new_rel_reltup->relispartition = false;
    1008             : 
    1009             :     /* fill rd_att's type ID with something sane even if reltype is zero */
    1010       73232 :     new_rel_desc->rd_att->tdtypeid = new_type_oid ? new_type_oid : RECORDOID;
    1011       73232 :     new_rel_desc->rd_att->tdtypmod = -1;
    1012             : 
    1013             :     /* Now build and insert the tuple */
    1014       73232 :     InsertPgClassTuple(pg_class_desc, new_rel_desc, new_rel_oid,
    1015             :                        relacl, reloptions);
    1016       73232 : }
    1017             : 
    1018             : 
    1019             : /* --------------------------------
    1020             :  *      AddNewRelationType -
    1021             :  *
    1022             :  *      define a composite type corresponding to the new relation
    1023             :  * --------------------------------
    1024             :  */
    1025             : static ObjectAddress
    1026       55892 : AddNewRelationType(const char *typeName,
    1027             :                    Oid typeNamespace,
    1028             :                    Oid new_rel_oid,
    1029             :                    char new_rel_kind,
    1030             :                    Oid ownerid,
    1031             :                    Oid new_row_type,
    1032             :                    Oid new_array_type)
    1033             : {
    1034             :     return
    1035       55892 :         TypeCreate(new_row_type,    /* optional predetermined OID */
    1036             :                    typeName,    /* type name */
    1037             :                    typeNamespace,   /* type namespace */
    1038             :                    new_rel_oid, /* relation oid */
    1039             :                    new_rel_kind,    /* relation kind */
    1040             :                    ownerid,     /* owner's ID */
    1041             :                    -1,          /* internal size (varlena) */
    1042             :                    TYPTYPE_COMPOSITE,   /* type-type (composite) */
    1043             :                    TYPCATEGORY_COMPOSITE,   /* type-category (ditto) */
    1044             :                    false,       /* composite types are never preferred */
    1045             :                    DEFAULT_TYPDELIM,    /* default array delimiter */
    1046             :                    F_RECORD_IN, /* input procedure */
    1047             :                    F_RECORD_OUT,    /* output procedure */
    1048             :                    F_RECORD_RECV,   /* receive procedure */
    1049             :                    F_RECORD_SEND,   /* send procedure */
    1050             :                    InvalidOid,  /* typmodin procedure - none */
    1051             :                    InvalidOid,  /* typmodout procedure - none */
    1052             :                    InvalidOid,  /* analyze procedure - default */
    1053             :                    InvalidOid,  /* subscript procedure - none */
    1054             :                    InvalidOid,  /* array element type - irrelevant */
    1055             :                    false,       /* this is not an array type */
    1056             :                    new_array_type,  /* array type if any */
    1057             :                    InvalidOid,  /* domain base type - irrelevant */
    1058             :                    NULL,        /* default value - none */
    1059             :                    NULL,        /* default binary representation */
    1060             :                    false,       /* passed by reference */
    1061             :                    TYPALIGN_DOUBLE, /* alignment - must be the largest! */
    1062             :                    TYPSTORAGE_EXTENDED, /* fully TOASTable */
    1063             :                    -1,          /* typmod */
    1064             :                    0,           /* array dimensions for typBaseType */
    1065             :                    false,       /* Type NOT NULL */
    1066             :                    InvalidOid); /* rowtypes never have a collation */
    1067             : }
    1068             : 
    1069             : /* --------------------------------
    1070             :  *      heap_create_with_catalog
    1071             :  *
    1072             :  *      creates a new cataloged relation.  see comments above.
    1073             :  *
    1074             :  * Arguments:
    1075             :  *  relname: name to give to new rel
    1076             :  *  relnamespace: OID of namespace it goes in
    1077             :  *  reltablespace: OID of tablespace it goes in
    1078             :  *  relid: OID to assign to new rel, or InvalidOid to select a new OID
    1079             :  *  reltypeid: OID to assign to rel's rowtype, or InvalidOid to select one
    1080             :  *  reloftypeid: if a typed table, OID of underlying type; else InvalidOid
    1081             :  *  ownerid: OID of new rel's owner
    1082             :  *  accessmtd: OID of new rel's access method
    1083             :  *  tupdesc: tuple descriptor (source of column definitions)
    1084             :  *  cooked_constraints: list of precooked check constraints and defaults
    1085             :  *  relkind: relkind for new rel
    1086             :  *  relpersistence: rel's persistence status (permanent, temp, or unlogged)
    1087             :  *  shared_relation: true if it's to be a shared relation
    1088             :  *  mapped_relation: true if the relation will use the relfilenumber map
    1089             :  *  oncommit: ON COMMIT marking (only relevant if it's a temp table)
    1090             :  *  reloptions: reloptions in Datum form, or (Datum) 0 if none
    1091             :  *  use_user_acl: true if should look for user-defined default permissions;
    1092             :  *      if false, relacl is always set NULL
    1093             :  *  allow_system_table_mods: true to allow creation in system namespaces
    1094             :  *  is_internal: is this a system-generated catalog?
    1095             :  *
    1096             :  * Output parameters:
    1097             :  *  typaddress: if not null, gets the object address of the new pg_type entry
    1098             :  *  (this must be null if the relkind is one that doesn't get a pg_type entry)
    1099             :  *
    1100             :  * Returns the OID of the new relation
    1101             :  * --------------------------------
    1102             :  */
    1103             : Oid
    1104       73256 : heap_create_with_catalog(const char *relname,
    1105             :                          Oid relnamespace,
    1106             :                          Oid reltablespace,
    1107             :                          Oid relid,
    1108             :                          Oid reltypeid,
    1109             :                          Oid reloftypeid,
    1110             :                          Oid ownerid,
    1111             :                          Oid accessmtd,
    1112             :                          TupleDesc tupdesc,
    1113             :                          List *cooked_constraints,
    1114             :                          char relkind,
    1115             :                          char relpersistence,
    1116             :                          bool shared_relation,
    1117             :                          bool mapped_relation,
    1118             :                          OnCommitAction oncommit,
    1119             :                          Datum reloptions,
    1120             :                          bool use_user_acl,
    1121             :                          bool allow_system_table_mods,
    1122             :                          bool is_internal,
    1123             :                          Oid relrewrite,
    1124             :                          ObjectAddress *typaddress)
    1125             : {
    1126             :     Relation    pg_class_desc;
    1127             :     Relation    new_rel_desc;
    1128             :     Acl        *relacl;
    1129             :     Oid         existing_relid;
    1130             :     Oid         old_type_oid;
    1131             :     Oid         new_type_oid;
    1132             : 
    1133             :     /* By default set to InvalidOid unless overridden by binary-upgrade */
    1134       73256 :     RelFileNumber relfilenumber = InvalidRelFileNumber;
    1135             :     TransactionId relfrozenxid;
    1136             :     MultiXactId relminmxid;
    1137             : 
    1138       73256 :     pg_class_desc = table_open(RelationRelationId, RowExclusiveLock);
    1139             : 
    1140             :     /*
    1141             :      * sanity checks
    1142             :      */
    1143             :     Assert(IsNormalProcessingMode() || IsBootstrapProcessingMode());
    1144             : 
    1145             :     /*
    1146             :      * Validate proposed tupdesc for the desired relkind.  If
    1147             :      * allow_system_table_mods is on, allow ANYARRAY to be used; this is a
    1148             :      * hack to allow creating pg_statistic and cloning it during VACUUM FULL.
    1149             :      */
    1150       73256 :     CheckAttributeNamesTypes(tupdesc, relkind,
    1151             :                              allow_system_table_mods ? CHKATYPE_ANYARRAY : 0);
    1152             : 
    1153             :     /*
    1154             :      * This would fail later on anyway, if the relation already exists.  But
    1155             :      * by catching it here we can emit a nicer error message.
    1156             :      */
    1157       73242 :     existing_relid = get_relname_relid(relname, relnamespace);
    1158       73242 :     if (existing_relid != InvalidOid)
    1159           2 :         ereport(ERROR,
    1160             :                 (errcode(ERRCODE_DUPLICATE_TABLE),
    1161             :                  errmsg("relation \"%s\" already exists", relname)));
    1162             : 
    1163             :     /*
    1164             :      * Since we are going to create a rowtype as well, also check for
    1165             :      * collision with an existing type name.  If there is one and it's an
    1166             :      * autogenerated array, we can rename it out of the way; otherwise we can
    1167             :      * at least give a good error message.
    1168             :      */
    1169       73240 :     old_type_oid = GetSysCacheOid2(TYPENAMENSP, Anum_pg_type_oid,
    1170             :                                    CStringGetDatum(relname),
    1171             :                                    ObjectIdGetDatum(relnamespace));
    1172       73240 :     if (OidIsValid(old_type_oid))
    1173             :     {
    1174           2 :         if (!moveArrayTypeName(old_type_oid, relname, relnamespace))
    1175           0 :             ereport(ERROR,
    1176             :                     (errcode(ERRCODE_DUPLICATE_OBJECT),
    1177             :                      errmsg("type \"%s\" already exists", relname),
    1178             :                      errhint("A relation has an associated type of the same name, "
    1179             :                              "so you must use a name that doesn't conflict "
    1180             :                              "with any existing type.")));
    1181             :     }
    1182             : 
    1183             :     /*
    1184             :      * Shared relations must be in pg_global (last-ditch check)
    1185             :      */
    1186       73240 :     if (shared_relation && reltablespace != GLOBALTABLESPACE_OID)
    1187           0 :         elog(ERROR, "shared relations must be placed in pg_global tablespace");
    1188             : 
    1189             :     /*
    1190             :      * Allocate an OID for the relation, unless we were told what to use.
    1191             :      *
    1192             :      * The OID will be the relfilenumber as well, so make sure it doesn't
    1193             :      * collide with either pg_class OIDs or existing physical files.
    1194             :      */
    1195       73240 :     if (!OidIsValid(relid))
    1196             :     {
    1197             :         /* Use binary-upgrade override for pg_class.oid and relfilenumber */
    1198       65560 :         if (IsBinaryUpgrade)
    1199             :         {
    1200             :             /*
    1201             :              * Indexes are not supported here; they use
    1202             :              * binary_upgrade_next_index_pg_class_oid.
    1203             :              */
    1204             :             Assert(relkind != RELKIND_INDEX);
    1205             :             Assert(relkind != RELKIND_PARTITIONED_INDEX);
    1206             : 
    1207        2076 :             if (relkind == RELKIND_TOASTVALUE)
    1208             :             {
    1209             :                 /* There might be no TOAST table, so we have to test for it. */
    1210         524 :                 if (OidIsValid(binary_upgrade_next_toast_pg_class_oid))
    1211             :                 {
    1212         524 :                     relid = binary_upgrade_next_toast_pg_class_oid;
    1213         524 :                     binary_upgrade_next_toast_pg_class_oid = InvalidOid;
    1214             : 
    1215         524 :                     if (!RelFileNumberIsValid(binary_upgrade_next_toast_pg_class_relfilenumber))
    1216           0 :                         ereport(ERROR,
    1217             :                                 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
    1218             :                                  errmsg("toast relfilenumber value not set when in binary upgrade mode")));
    1219             : 
    1220         524 :                     relfilenumber = binary_upgrade_next_toast_pg_class_relfilenumber;
    1221         524 :                     binary_upgrade_next_toast_pg_class_relfilenumber = InvalidRelFileNumber;
    1222             :                 }
    1223             :             }
    1224             :             else
    1225             :             {
    1226        1552 :                 if (!OidIsValid(binary_upgrade_next_heap_pg_class_oid))
    1227           0 :                     ereport(ERROR,
    1228             :                             (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
    1229             :                              errmsg("pg_class heap OID value not set when in binary upgrade mode")));
    1230             : 
    1231        1552 :                 relid = binary_upgrade_next_heap_pg_class_oid;
    1232        1552 :                 binary_upgrade_next_heap_pg_class_oid = InvalidOid;
    1233             : 
    1234        1552 :                 if (RELKIND_HAS_STORAGE(relkind))
    1235             :                 {
    1236        1266 :                     if (!RelFileNumberIsValid(binary_upgrade_next_heap_pg_class_relfilenumber))
    1237           0 :                         ereport(ERROR,
    1238             :                                 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
    1239             :                                  errmsg("relfilenumber value not set when in binary upgrade mode")));
    1240             : 
    1241        1266 :                     relfilenumber = binary_upgrade_next_heap_pg_class_relfilenumber;
    1242        1266 :                     binary_upgrade_next_heap_pg_class_relfilenumber = InvalidRelFileNumber;
    1243             :                 }
    1244             :             }
    1245             :         }
    1246             : 
    1247       65560 :         if (!OidIsValid(relid))
    1248       63484 :             relid = GetNewRelFileNumber(reltablespace, pg_class_desc,
    1249             :                                         relpersistence);
    1250             :     }
    1251             : 
    1252             :     /*
    1253             :      * Determine the relation's initial permissions.
    1254             :      */
    1255       73240 :     if (use_user_acl)
    1256             :     {
    1257       51098 :         switch (relkind)
    1258             :         {
    1259       48782 :             case RELKIND_RELATION:
    1260             :             case RELKIND_VIEW:
    1261             :             case RELKIND_MATVIEW:
    1262             :             case RELKIND_FOREIGN_TABLE:
    1263             :             case RELKIND_PARTITIONED_TABLE:
    1264       48782 :                 relacl = get_user_default_acl(OBJECT_TABLE, ownerid,
    1265             :                                               relnamespace);
    1266       48782 :                 break;
    1267        1644 :             case RELKIND_SEQUENCE:
    1268        1644 :                 relacl = get_user_default_acl(OBJECT_SEQUENCE, ownerid,
    1269             :                                               relnamespace);
    1270        1644 :                 break;
    1271         672 :             default:
    1272         672 :                 relacl = NULL;
    1273         672 :                 break;
    1274             :         }
    1275             :     }
    1276             :     else
    1277       22142 :         relacl = NULL;
    1278             : 
    1279             :     /*
    1280             :      * Create the relcache entry (mostly dummy at this point) and the physical
    1281             :      * disk file.  (If we fail further down, it's the smgr's responsibility to
    1282             :      * remove the disk file again.)
    1283             :      *
    1284             :      * NB: Note that passing create_storage = true is correct even for binary
    1285             :      * upgrade.  The storage we create here will be replaced later, but we
    1286             :      * need to have something on disk in the meanwhile.
    1287             :      */
    1288       73240 :     new_rel_desc = heap_create(relname,
    1289             :                                relnamespace,
    1290             :                                reltablespace,
    1291             :                                relid,
    1292             :                                relfilenumber,
    1293             :                                accessmtd,
    1294             :                                tupdesc,
    1295             :                                relkind,
    1296             :                                relpersistence,
    1297             :                                shared_relation,
    1298             :                                mapped_relation,
    1299             :                                allow_system_table_mods,
    1300             :                                &relfrozenxid,
    1301             :                                &relminmxid,
    1302             :                                true);
    1303             : 
    1304             :     Assert(relid == RelationGetRelid(new_rel_desc));
    1305             : 
    1306       73232 :     new_rel_desc->rd_rel->relrewrite = relrewrite;
    1307             : 
    1308             :     /*
    1309             :      * Decide whether to create a pg_type entry for the relation's rowtype.
    1310             :      * These types are made except where the use of a relation as such is an
    1311             :      * implementation detail: toast tables, sequences and indexes.
    1312             :      */
    1313      129124 :     if (!(relkind == RELKIND_SEQUENCE ||
    1314       55892 :           relkind == RELKIND_TOASTVALUE ||
    1315             :           relkind == RELKIND_INDEX ||
    1316             :           relkind == RELKIND_PARTITIONED_INDEX))
    1317       55892 :     {
    1318             :         Oid         new_array_oid;
    1319             :         ObjectAddress new_type_addr;
    1320             :         char       *relarrayname;
    1321             : 
    1322             :         /*
    1323             :          * We'll make an array over the composite type, too.  For largely
    1324             :          * historical reasons, the array type's OID is assigned first.
    1325             :          */
    1326       55892 :         new_array_oid = AssignTypeArrayOid();
    1327             : 
    1328             :         /*
    1329             :          * Make the pg_type entry for the composite type.  The OID of the
    1330             :          * composite type can be preselected by the caller, but if reltypeid
    1331             :          * is InvalidOid, we'll generate a new OID for it.
    1332             :          *
    1333             :          * NOTE: we could get a unique-index failure here, in case someone
    1334             :          * else is creating the same type name in parallel but hadn't
    1335             :          * committed yet when we checked for a duplicate name above.
    1336             :          */
    1337       55892 :         new_type_addr = AddNewRelationType(relname,
    1338             :                                            relnamespace,
    1339             :                                            relid,
    1340             :                                            relkind,
    1341             :                                            ownerid,
    1342             :                                            reltypeid,
    1343             :                                            new_array_oid);
    1344       55892 :         new_type_oid = new_type_addr.objectId;
    1345       55892 :         if (typaddress)
    1346         672 :             *typaddress = new_type_addr;
    1347             : 
    1348             :         /* Now create the array type. */
    1349       55892 :         relarrayname = makeArrayTypeName(relname, relnamespace);
    1350             : 
    1351       55892 :         TypeCreate(new_array_oid,   /* force the type's OID to this */
    1352             :                    relarrayname,    /* Array type name */
    1353             :                    relnamespace,    /* Same namespace as parent */
    1354             :                    InvalidOid,  /* Not composite, no relationOid */
    1355             :                    0,           /* relkind, also N/A here */
    1356             :                    ownerid,     /* owner's ID */
    1357             :                    -1,          /* Internal size (varlena) */
    1358             :                    TYPTYPE_BASE,    /* Not composite - typelem is */
    1359             :                    TYPCATEGORY_ARRAY,   /* type-category (array) */
    1360             :                    false,       /* array types are never preferred */
    1361             :                    DEFAULT_TYPDELIM,    /* default array delimiter */
    1362             :                    F_ARRAY_IN,  /* array input proc */
    1363             :                    F_ARRAY_OUT, /* array output proc */
    1364             :                    F_ARRAY_RECV,    /* array recv (bin) proc */
    1365             :                    F_ARRAY_SEND,    /* array send (bin) proc */
    1366             :                    InvalidOid,  /* typmodin procedure - none */
    1367             :                    InvalidOid,  /* typmodout procedure - none */
    1368             :                    F_ARRAY_TYPANALYZE,  /* array analyze procedure */
    1369             :                    F_ARRAY_SUBSCRIPT_HANDLER,   /* array subscript procedure */
    1370             :                    new_type_oid,    /* array element type - the rowtype */
    1371             :                    true,        /* yes, this is an array type */
    1372             :                    InvalidOid,  /* this has no array type */
    1373             :                    InvalidOid,  /* domain base type - irrelevant */
    1374             :                    NULL,        /* default value - none */
    1375             :                    NULL,        /* default binary representation */
    1376             :                    false,       /* passed by reference */
    1377             :                    TYPALIGN_DOUBLE, /* alignment - must be the largest! */
    1378             :                    TYPSTORAGE_EXTENDED, /* fully TOASTable */
    1379             :                    -1,          /* typmod */
    1380             :                    0,           /* array dimensions for typBaseType */
    1381             :                    false,       /* Type NOT NULL */
    1382             :                    InvalidOid); /* rowtypes never have a collation */
    1383             : 
    1384       55892 :         pfree(relarrayname);
    1385             :     }
    1386             :     else
    1387             :     {
    1388             :         /* Caller should not be expecting a type to be created. */
    1389             :         Assert(reltypeid == InvalidOid);
    1390             :         Assert(typaddress == NULL);
    1391             : 
    1392       17340 :         new_type_oid = InvalidOid;
    1393             :     }
    1394             : 
    1395             :     /*
    1396             :      * now create an entry in pg_class for the relation.
    1397             :      *
    1398             :      * NOTE: we could get a unique-index failure here, in case someone else is
    1399             :      * creating the same relation name in parallel but hadn't committed yet
    1400             :      * when we checked for a duplicate name above.
    1401             :      */
    1402       73232 :     AddNewRelationTuple(pg_class_desc,
    1403             :                         new_rel_desc,
    1404             :                         relid,
    1405             :                         new_type_oid,
    1406             :                         reloftypeid,
    1407             :                         ownerid,
    1408             :                         relkind,
    1409             :                         relfrozenxid,
    1410             :                         relminmxid,
    1411             :                         PointerGetDatum(relacl),
    1412             :                         reloptions);
    1413             : 
    1414             :     /*
    1415             :      * now add tuples to pg_attribute for the attributes in our new relation.
    1416             :      */
    1417       73232 :     AddNewAttributeTuples(relid, new_rel_desc->rd_att, relkind);
    1418             : 
    1419             :     /*
    1420             :      * Make a dependency link to force the relation to be deleted if its
    1421             :      * namespace is.  Also make a dependency link to its owner, as well as
    1422             :      * dependencies for any roles mentioned in the default ACL.
    1423             :      *
    1424             :      * For composite types, these dependencies are tracked for the pg_type
    1425             :      * entry, so we needn't record them here.  Likewise, TOAST tables don't
    1426             :      * need a namespace dependency (they live in a pinned namespace) nor an
    1427             :      * owner dependency (they depend indirectly through the parent table), nor
    1428             :      * should they have any ACL entries.  The same applies for extension
    1429             :      * dependencies.
    1430             :      *
    1431             :      * Also, skip this in bootstrap mode, since we don't make dependencies
    1432             :      * while bootstrapping.
    1433             :      */
    1434       73232 :     if (relkind != RELKIND_COMPOSITE_TYPE &&
    1435       56864 :         relkind != RELKIND_TOASTVALUE &&
    1436       56864 :         !IsBootstrapProcessingMode())
    1437             :     {
    1438             :         ObjectAddress myself,
    1439             :                     referenced;
    1440             :         ObjectAddresses *addrs;
    1441             : 
    1442       52064 :         ObjectAddressSet(myself, RelationRelationId, relid);
    1443             : 
    1444       52064 :         recordDependencyOnOwner(RelationRelationId, relid, ownerid);
    1445             : 
    1446       52064 :         recordDependencyOnNewAcl(RelationRelationId, relid, 0, ownerid, relacl);
    1447             : 
    1448       52064 :         recordDependencyOnCurrentExtension(&myself, false);
    1449             : 
    1450       52064 :         addrs = new_object_addresses();
    1451             : 
    1452       52064 :         ObjectAddressSet(referenced, NamespaceRelationId, relnamespace);
    1453       52064 :         add_exact_object_address(&referenced, addrs);
    1454             : 
    1455       52064 :         if (reloftypeid)
    1456             :         {
    1457          68 :             ObjectAddressSet(referenced, TypeRelationId, reloftypeid);
    1458          68 :             add_exact_object_address(&referenced, addrs);
    1459             :         }
    1460             : 
    1461             :         /*
    1462             :          * Make a dependency link to force the relation to be deleted if its
    1463             :          * access method is.
    1464             :          *
    1465             :          * No need to add an explicit dependency for the toast table, as the
    1466             :          * main table depends on it.
    1467             :          */
    1468       52064 :         if (RELKIND_HAS_TABLE_AM(relkind) && relkind != RELKIND_TOASTVALUE)
    1469             :         {
    1470       32098 :             ObjectAddressSet(referenced, AccessMethodRelationId, accessmtd);
    1471       32098 :             add_exact_object_address(&referenced, addrs);
    1472             :         }
    1473             : 
    1474       52064 :         record_object_address_dependencies(&myself, addrs, DEPENDENCY_NORMAL);
    1475       52064 :         free_object_addresses(addrs);
    1476             :     }
    1477             : 
    1478             :     /* Post creation hook for new relation */
    1479       73232 :     InvokeObjectPostCreateHookArg(RelationRelationId, relid, 0, is_internal);
    1480             : 
    1481             :     /*
    1482             :      * Store any supplied constraints and defaults.
    1483             :      *
    1484             :      * NB: this may do a CommandCounterIncrement and rebuild the relcache
    1485             :      * entry, so the relation must be valid and self-consistent at this point.
    1486             :      * In particular, there are not yet constraints and defaults anywhere.
    1487             :      */
    1488       73232 :     StoreConstraints(new_rel_desc, cooked_constraints, is_internal);
    1489             : 
    1490             :     /*
    1491             :      * If there's a special on-commit action, remember it
    1492             :      */
    1493       73232 :     if (oncommit != ONCOMMIT_NOOP)
    1494         166 :         register_on_commit_action(relid, oncommit);
    1495             : 
    1496             :     /*
    1497             :      * ok, the relation has been cataloged, so close our relations and return
    1498             :      * the OID of the newly created relation.
    1499             :      */
    1500       73232 :     table_close(new_rel_desc, NoLock);  /* do not unlock till end of xact */
    1501       73232 :     table_close(pg_class_desc, RowExclusiveLock);
    1502             : 
    1503       73232 :     return relid;
    1504             : }
    1505             : 
    1506             : /*
    1507             :  *      RelationRemoveInheritance
    1508             :  *
    1509             :  * Formerly, this routine checked for child relations and aborted the
    1510             :  * deletion if any were found.  Now we rely on the dependency mechanism
    1511             :  * to check for or delete child relations.  By the time we get here,
    1512             :  * there are no children and we need only remove any pg_inherits rows
    1513             :  * linking this relation to its parent(s).
    1514             :  */
    1515             : static void
    1516       40420 : RelationRemoveInheritance(Oid relid)
    1517             : {
    1518             :     Relation    catalogRelation;
    1519             :     SysScanDesc scan;
    1520             :     ScanKeyData key;
    1521             :     HeapTuple   tuple;
    1522             : 
    1523       40420 :     catalogRelation = table_open(InheritsRelationId, RowExclusiveLock);
    1524             : 
    1525       40420 :     ScanKeyInit(&key,
    1526             :                 Anum_pg_inherits_inhrelid,
    1527             :                 BTEqualStrategyNumber, F_OIDEQ,
    1528             :                 ObjectIdGetDatum(relid));
    1529             : 
    1530       40420 :     scan = systable_beginscan(catalogRelation, InheritsRelidSeqnoIndexId, true,
    1531             :                               NULL, 1, &key);
    1532             : 
    1533       48624 :     while (HeapTupleIsValid(tuple = systable_getnext(scan)))
    1534        8204 :         CatalogTupleDelete(catalogRelation, &tuple->t_self);
    1535             : 
    1536       40420 :     systable_endscan(scan);
    1537       40420 :     table_close(catalogRelation, RowExclusiveLock);
    1538       40420 : }
    1539             : 
    1540             : /*
    1541             :  *      DeleteRelationTuple
    1542             :  *
    1543             :  * Remove pg_class row for the given relid.
    1544             :  *
    1545             :  * Note: this is shared by relation deletion and index deletion.  It's
    1546             :  * not intended for use anyplace else.
    1547             :  */
    1548             : void
    1549       62304 : DeleteRelationTuple(Oid relid)
    1550             : {
    1551             :     Relation    pg_class_desc;
    1552             :     HeapTuple   tup;
    1553             : 
    1554             :     /* Grab an appropriate lock on the pg_class relation */
    1555       62304 :     pg_class_desc = table_open(RelationRelationId, RowExclusiveLock);
    1556             : 
    1557       62304 :     tup = SearchSysCache1(RELOID, ObjectIdGetDatum(relid));
    1558       62304 :     if (!HeapTupleIsValid(tup))
    1559           0 :         elog(ERROR, "cache lookup failed for relation %u", relid);
    1560             : 
    1561             :     /* delete the relation tuple from pg_class, and finish up */
    1562       62304 :     CatalogTupleDelete(pg_class_desc, &tup->t_self);
    1563             : 
    1564       62304 :     ReleaseSysCache(tup);
    1565             : 
    1566       62304 :     table_close(pg_class_desc, RowExclusiveLock);
    1567       62304 : }
    1568             : 
    1569             : /*
    1570             :  *      DeleteAttributeTuples
    1571             :  *
    1572             :  * Remove pg_attribute rows for the given relid.
    1573             :  *
    1574             :  * Note: this is shared by relation deletion and index deletion.  It's
    1575             :  * not intended for use anyplace else.
    1576             :  */
    1577             : void
    1578       62304 : DeleteAttributeTuples(Oid relid)
    1579             : {
    1580             :     Relation    attrel;
    1581             :     SysScanDesc scan;
    1582             :     ScanKeyData key[1];
    1583             :     HeapTuple   atttup;
    1584             : 
    1585             :     /* Grab an appropriate lock on the pg_attribute relation */
    1586       62304 :     attrel = table_open(AttributeRelationId, RowExclusiveLock);
    1587             : 
    1588             :     /* Use the index to scan only attributes of the target relation */
    1589       62304 :     ScanKeyInit(&key[0],
    1590             :                 Anum_pg_attribute_attrelid,
    1591             :                 BTEqualStrategyNumber, F_OIDEQ,
    1592             :                 ObjectIdGetDatum(relid));
    1593             : 
    1594       62304 :     scan = systable_beginscan(attrel, AttributeRelidNumIndexId, true,
    1595             :                               NULL, 1, key);
    1596             : 
    1597             :     /* Delete all the matching tuples */
    1598      423020 :     while ((atttup = systable_getnext(scan)) != NULL)
    1599      360716 :         CatalogTupleDelete(attrel, &atttup->t_self);
    1600             : 
    1601             :     /* Clean up after the scan */
    1602       62304 :     systable_endscan(scan);
    1603       62304 :     table_close(attrel, RowExclusiveLock);
    1604       62304 : }
    1605             : 
    1606             : /*
    1607             :  *      DeleteSystemAttributeTuples
    1608             :  *
    1609             :  * Remove pg_attribute rows for system columns of the given relid.
    1610             :  *
    1611             :  * Note: this is only used when converting a table to a view.  Views don't
    1612             :  * have system columns, so we should remove them from pg_attribute.
    1613             :  */
    1614             : void
    1615           0 : DeleteSystemAttributeTuples(Oid relid)
    1616             : {
    1617             :     Relation    attrel;
    1618             :     SysScanDesc scan;
    1619             :     ScanKeyData key[2];
    1620             :     HeapTuple   atttup;
    1621             : 
    1622             :     /* Grab an appropriate lock on the pg_attribute relation */
    1623           0 :     attrel = table_open(AttributeRelationId, RowExclusiveLock);
    1624             : 
    1625             :     /* Use the index to scan only system attributes of the target relation */
    1626           0 :     ScanKeyInit(&key[0],
    1627             :                 Anum_pg_attribute_attrelid,
    1628             :                 BTEqualStrategyNumber, F_OIDEQ,
    1629             :                 ObjectIdGetDatum(relid));
    1630           0 :     ScanKeyInit(&key[1],
    1631             :                 Anum_pg_attribute_attnum,
    1632             :                 BTLessEqualStrategyNumber, F_INT2LE,
    1633             :                 Int16GetDatum(0));
    1634             : 
    1635           0 :     scan = systable_beginscan(attrel, AttributeRelidNumIndexId, true,
    1636             :                               NULL, 2, key);
    1637             : 
    1638             :     /* Delete all the matching tuples */
    1639           0 :     while ((atttup = systable_getnext(scan)) != NULL)
    1640           0 :         CatalogTupleDelete(attrel, &atttup->t_self);
    1641             : 
    1642             :     /* Clean up after the scan */
    1643           0 :     systable_endscan(scan);
    1644           0 :     table_close(attrel, RowExclusiveLock);
    1645           0 : }
    1646             : 
    1647             : /*
    1648             :  *      RemoveAttributeById
    1649             :  *
    1650             :  * This is the guts of ALTER TABLE DROP COLUMN: actually mark the attribute
    1651             :  * deleted in pg_attribute.  We also remove pg_statistic entries for it.
    1652             :  * (Everything else needed, such as getting rid of any pg_attrdef entry,
    1653             :  * is handled by dependency.c.)
    1654             :  */
    1655             : void
    1656        1966 : RemoveAttributeById(Oid relid, AttrNumber attnum)
    1657             : {
    1658             :     Relation    rel;
    1659             :     Relation    attr_rel;
    1660             :     HeapTuple   tuple;
    1661             :     Form_pg_attribute attStruct;
    1662             :     char        newattname[NAMEDATALEN];
    1663        1966 :     Datum       valuesAtt[Natts_pg_attribute] = {0};
    1664        1966 :     bool        nullsAtt[Natts_pg_attribute] = {0};
    1665        1966 :     bool        replacesAtt[Natts_pg_attribute] = {0};
    1666             : 
    1667             :     /*
    1668             :      * Grab an exclusive lock on the target table, which we will NOT release
    1669             :      * until end of transaction.  (In the simple case where we are directly
    1670             :      * dropping this column, ATExecDropColumn already did this ... but when
    1671             :      * cascading from a drop of some other object, we may not have any lock.)
    1672             :      */
    1673        1966 :     rel = relation_open(relid, AccessExclusiveLock);
    1674             : 
    1675        1966 :     attr_rel = table_open(AttributeRelationId, RowExclusiveLock);
    1676             : 
    1677        1966 :     tuple = SearchSysCacheCopy2(ATTNUM,
    1678             :                                 ObjectIdGetDatum(relid),
    1679             :                                 Int16GetDatum(attnum));
    1680        1966 :     if (!HeapTupleIsValid(tuple))   /* shouldn't happen */
    1681           0 :         elog(ERROR, "cache lookup failed for attribute %d of relation %u",
    1682             :              attnum, relid);
    1683        1966 :     attStruct = (Form_pg_attribute) GETSTRUCT(tuple);
    1684             : 
    1685             :     /* Mark the attribute as dropped */
    1686        1966 :     attStruct->attisdropped = true;
    1687             : 
    1688             :     /*
    1689             :      * Set the type OID to invalid.  A dropped attribute's type link cannot be
    1690             :      * relied on (once the attribute is dropped, the type might be too).
    1691             :      * Fortunately we do not need the type row --- the only really essential
    1692             :      * information is the type's typlen and typalign, which are preserved in
    1693             :      * the attribute's attlen and attalign.  We set atttypid to zero here as a
    1694             :      * means of catching code that incorrectly expects it to be valid.
    1695             :      */
    1696        1966 :     attStruct->atttypid = InvalidOid;
    1697             : 
    1698             :     /* Remove any not-null constraint the column may have */
    1699        1966 :     attStruct->attnotnull = false;
    1700             : 
    1701             :     /* Unset this so no one tries to look up the generation expression */
    1702        1966 :     attStruct->attgenerated = '\0';
    1703             : 
    1704             :     /*
    1705             :      * Change the column name to something that isn't likely to conflict
    1706             :      */
    1707        1966 :     snprintf(newattname, sizeof(newattname),
    1708             :              "........pg.dropped.%d........", attnum);
    1709        1966 :     namestrcpy(&(attStruct->attname), newattname);
    1710             : 
    1711             :     /* Clear the missing value */
    1712        1966 :     attStruct->atthasmissing = false;
    1713        1966 :     nullsAtt[Anum_pg_attribute_attmissingval - 1] = true;
    1714        1966 :     replacesAtt[Anum_pg_attribute_attmissingval - 1] = true;
    1715             : 
    1716             :     /*
    1717             :      * Clear the other nullable fields.  This saves some space in pg_attribute
    1718             :      * and removes no longer useful information.
    1719             :      */
    1720        1966 :     nullsAtt[Anum_pg_attribute_attstattarget - 1] = true;
    1721        1966 :     replacesAtt[Anum_pg_attribute_attstattarget - 1] = true;
    1722        1966 :     nullsAtt[Anum_pg_attribute_attacl - 1] = true;
    1723        1966 :     replacesAtt[Anum_pg_attribute_attacl - 1] = true;
    1724        1966 :     nullsAtt[Anum_pg_attribute_attoptions - 1] = true;
    1725        1966 :     replacesAtt[Anum_pg_attribute_attoptions - 1] = true;
    1726        1966 :     nullsAtt[Anum_pg_attribute_attfdwoptions - 1] = true;
    1727        1966 :     replacesAtt[Anum_pg_attribute_attfdwoptions - 1] = true;
    1728             : 
    1729        1966 :     tuple = heap_modify_tuple(tuple, RelationGetDescr(attr_rel),
    1730             :                               valuesAtt, nullsAtt, replacesAtt);
    1731             : 
    1732        1966 :     CatalogTupleUpdate(attr_rel, &tuple->t_self, tuple);
    1733             : 
    1734             :     /*
    1735             :      * Because updating the pg_attribute row will trigger a relcache flush for
    1736             :      * the target relation, we need not do anything else to notify other
    1737             :      * backends of the change.
    1738             :      */
    1739             : 
    1740        1966 :     table_close(attr_rel, RowExclusiveLock);
    1741             : 
    1742        1966 :     RemoveStatistics(relid, attnum);
    1743             : 
    1744        1966 :     relation_close(rel, NoLock);
    1745        1966 : }
    1746             : 
    1747             : /*
    1748             :  * heap_drop_with_catalog   - removes specified relation from catalogs
    1749             :  *
    1750             :  * Note that this routine is not responsible for dropping objects that are
    1751             :  * linked to the pg_class entry via dependencies (for example, indexes and
    1752             :  * constraints).  Those are deleted by the dependency-tracing logic in
    1753             :  * dependency.c before control gets here.  In general, therefore, this routine
    1754             :  * should never be called directly; go through performDeletion() instead.
    1755             :  */
    1756             : void
    1757       40420 : heap_drop_with_catalog(Oid relid)
    1758             : {
    1759             :     Relation    rel;
    1760             :     HeapTuple   tuple;
    1761       40420 :     Oid         parentOid = InvalidOid,
    1762       40420 :                 defaultPartOid = InvalidOid;
    1763             : 
    1764             :     /*
    1765             :      * To drop a partition safely, we must grab exclusive lock on its parent,
    1766             :      * because another backend might be about to execute a query on the parent
    1767             :      * table.  If it relies on previously cached partition descriptor, then it
    1768             :      * could attempt to access the just-dropped relation as its partition. We
    1769             :      * must therefore take a table lock strong enough to prevent all queries
    1770             :      * on the table from proceeding until we commit and send out a
    1771             :      * shared-cache-inval notice that will make them update their partition
    1772             :      * descriptors.
    1773             :      */
    1774       40420 :     tuple = SearchSysCache1(RELOID, ObjectIdGetDatum(relid));
    1775       40420 :     if (!HeapTupleIsValid(tuple))
    1776           0 :         elog(ERROR, "cache lookup failed for relation %u", relid);
    1777       40420 :     if (((Form_pg_class) GETSTRUCT(tuple))->relispartition)
    1778             :     {
    1779             :         /*
    1780             :          * We have to lock the parent if the partition is being detached,
    1781             :          * because it's possible that some query still has a partition
    1782             :          * descriptor that includes this partition.
    1783             :          */
    1784        6622 :         parentOid = get_partition_parent(relid, true);
    1785        6622 :         LockRelationOid(parentOid, AccessExclusiveLock);
    1786             : 
    1787             :         /*
    1788             :          * If this is not the default partition, dropping it will change the
    1789             :          * default partition's partition constraint, so we must lock it.
    1790             :          */
    1791        6622 :         defaultPartOid = get_default_partition_oid(parentOid);
    1792        6622 :         if (OidIsValid(defaultPartOid) && relid != defaultPartOid)
    1793         374 :             LockRelationOid(defaultPartOid, AccessExclusiveLock);
    1794             :     }
    1795             : 
    1796       40420 :     ReleaseSysCache(tuple);
    1797             : 
    1798             :     /*
    1799             :      * Open and lock the relation.
    1800             :      */
    1801       40420 :     rel = relation_open(relid, AccessExclusiveLock);
    1802             : 
    1803             :     /*
    1804             :      * There can no longer be anyone *else* touching the relation, but we
    1805             :      * might still have open queries or cursors, or pending trigger events, in
    1806             :      * our own session.
    1807             :      */
    1808       40420 :     CheckTableNotInUse(rel, "DROP TABLE");
    1809             : 
    1810             :     /*
    1811             :      * This effectively deletes all rows in the table, and may be done in a
    1812             :      * serializable transaction.  In that case we must record a rw-conflict in
    1813             :      * to this transaction from each transaction holding a predicate lock on
    1814             :      * the table.
    1815             :      */
    1816       40420 :     CheckTableForSerializableConflictIn(rel);
    1817             : 
    1818             :     /*
    1819             :      * Delete pg_foreign_table tuple first.
    1820             :      */
    1821       40420 :     if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
    1822             :     {
    1823             :         Relation    ftrel;
    1824             :         HeapTuple   fttuple;
    1825             : 
    1826         230 :         ftrel = table_open(ForeignTableRelationId, RowExclusiveLock);
    1827             : 
    1828         230 :         fttuple = SearchSysCache1(FOREIGNTABLEREL, ObjectIdGetDatum(relid));
    1829         230 :         if (!HeapTupleIsValid(fttuple))
    1830           0 :             elog(ERROR, "cache lookup failed for foreign table %u", relid);
    1831             : 
    1832         230 :         CatalogTupleDelete(ftrel, &fttuple->t_self);
    1833             : 
    1834         230 :         ReleaseSysCache(fttuple);
    1835         230 :         table_close(ftrel, RowExclusiveLock);
    1836             :     }
    1837             : 
    1838             :     /*
    1839             :      * If a partitioned table, delete the pg_partitioned_table tuple.
    1840             :      */
    1841       40420 :     if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
    1842        3584 :         RemovePartitionKeyByRelId(relid);
    1843             : 
    1844             :     /*
    1845             :      * If the relation being dropped is the default partition itself,
    1846             :      * invalidate its entry in pg_partitioned_table.
    1847             :      */
    1848       40420 :     if (relid == defaultPartOid)
    1849         410 :         update_default_partition_oid(parentOid, InvalidOid);
    1850             : 
    1851             :     /*
    1852             :      * Schedule unlinking of the relation's physical files at commit.
    1853             :      */
    1854       40420 :     if (RELKIND_HAS_STORAGE(rel->rd_rel->relkind))
    1855       34226 :         RelationDropStorage(rel);
    1856             : 
    1857             :     /* ensure that stats are dropped if transaction commits */
    1858       40420 :     pgstat_drop_relation(rel);
    1859             : 
    1860             :     /*
    1861             :      * Close relcache entry, but *keep* AccessExclusiveLock on the relation
    1862             :      * until transaction commit.  This ensures no one else will try to do
    1863             :      * something with the doomed relation.
    1864             :      */
    1865       40420 :     relation_close(rel, NoLock);
    1866             : 
    1867             :     /*
    1868             :      * Remove any associated relation synchronization states.
    1869             :      */
    1870       40420 :     RemoveSubscriptionRel(InvalidOid, relid);
    1871             : 
    1872             :     /*
    1873             :      * Forget any ON COMMIT action for the rel
    1874             :      */
    1875       40420 :     remove_on_commit_action(relid);
    1876             : 
    1877             :     /*
    1878             :      * Flush the relation from the relcache.  We want to do this before
    1879             :      * starting to remove catalog entries, just to be certain that no relcache
    1880             :      * entry rebuild will happen partway through.  (That should not really
    1881             :      * matter, since we don't do CommandCounterIncrement here, but let's be
    1882             :      * safe.)
    1883             :      */
    1884       40420 :     RelationForgetRelation(relid);
    1885             : 
    1886             :     /*
    1887             :      * remove inheritance information
    1888             :      */
    1889       40420 :     RelationRemoveInheritance(relid);
    1890             : 
    1891             :     /*
    1892             :      * delete statistics
    1893             :      */
    1894       40420 :     RemoveStatistics(relid, 0);
    1895             : 
    1896             :     /*
    1897             :      * delete attribute tuples
    1898             :      */
    1899       40420 :     DeleteAttributeTuples(relid);
    1900             : 
    1901             :     /*
    1902             :      * delete relation tuple
    1903             :      */
    1904       40420 :     DeleteRelationTuple(relid);
    1905             : 
    1906       40420 :     if (OidIsValid(parentOid))
    1907             :     {
    1908             :         /*
    1909             :          * If this is not the default partition, the partition constraint of
    1910             :          * the default partition has changed to include the portion of the key
    1911             :          * space previously covered by the dropped partition.
    1912             :          */
    1913        6622 :         if (OidIsValid(defaultPartOid) && relid != defaultPartOid)
    1914         374 :             CacheInvalidateRelcacheByRelid(defaultPartOid);
    1915             : 
    1916             :         /*
    1917             :          * Invalidate the parent's relcache so that the partition is no longer
    1918             :          * included in its partition descriptor.
    1919             :          */
    1920        6622 :         CacheInvalidateRelcacheByRelid(parentOid);
    1921             :         /* keep the lock */
    1922             :     }
    1923       40420 : }
    1924             : 
    1925             : 
    1926             : /*
    1927             :  * RelationClearMissing
    1928             :  *
    1929             :  * Set atthasmissing and attmissingval to false/null for all attributes
    1930             :  * where they are currently set. This can be safely and usefully done if
    1931             :  * the table is rewritten (e.g. by VACUUM FULL or CLUSTER) where we know there
    1932             :  * are no rows left with less than a full complement of attributes.
    1933             :  *
    1934             :  * The caller must have an AccessExclusive lock on the relation.
    1935             :  */
    1936             : void
    1937        2068 : RelationClearMissing(Relation rel)
    1938             : {
    1939             :     Relation    attr_rel;
    1940        2068 :     Oid         relid = RelationGetRelid(rel);
    1941        2068 :     int         natts = RelationGetNumberOfAttributes(rel);
    1942             :     int         attnum;
    1943             :     Datum       repl_val[Natts_pg_attribute];
    1944             :     bool        repl_null[Natts_pg_attribute];
    1945             :     bool        repl_repl[Natts_pg_attribute];
    1946             :     Form_pg_attribute attrtuple;
    1947             :     HeapTuple   tuple,
    1948             :                 newtuple;
    1949             : 
    1950        2068 :     memset(repl_val, 0, sizeof(repl_val));
    1951        2068 :     memset(repl_null, false, sizeof(repl_null));
    1952        2068 :     memset(repl_repl, false, sizeof(repl_repl));
    1953             : 
    1954        2068 :     repl_val[Anum_pg_attribute_atthasmissing - 1] = BoolGetDatum(false);
    1955        2068 :     repl_null[Anum_pg_attribute_attmissingval - 1] = true;
    1956             : 
    1957        2068 :     repl_repl[Anum_pg_attribute_atthasmissing - 1] = true;
    1958        2068 :     repl_repl[Anum_pg_attribute_attmissingval - 1] = true;
    1959             : 
    1960             : 
    1961             :     /* Get a lock on pg_attribute */
    1962        2068 :     attr_rel = table_open(AttributeRelationId, RowExclusiveLock);
    1963             : 
    1964             :     /* process each non-system attribute, including any dropped columns */
    1965        7718 :     for (attnum = 1; attnum <= natts; attnum++)
    1966             :     {
    1967        5650 :         tuple = SearchSysCache2(ATTNUM,
    1968             :                                 ObjectIdGetDatum(relid),
    1969             :                                 Int16GetDatum(attnum));
    1970        5650 :         if (!HeapTupleIsValid(tuple))   /* shouldn't happen */
    1971           0 :             elog(ERROR, "cache lookup failed for attribute %d of relation %u",
    1972             :                  attnum, relid);
    1973             : 
    1974        5650 :         attrtuple = (Form_pg_attribute) GETSTRUCT(tuple);
    1975             : 
    1976             :         /* ignore any where atthasmissing is not true */
    1977        5650 :         if (attrtuple->atthasmissing)
    1978             :         {
    1979          96 :             newtuple = heap_modify_tuple(tuple, RelationGetDescr(attr_rel),
    1980             :                                          repl_val, repl_null, repl_repl);
    1981             : 
    1982          96 :             CatalogTupleUpdate(attr_rel, &newtuple->t_self, newtuple);
    1983             : 
    1984          96 :             heap_freetuple(newtuple);
    1985             :         }
    1986             : 
    1987        5650 :         ReleaseSysCache(tuple);
    1988             :     }
    1989             : 
    1990             :     /*
    1991             :      * Our update of the pg_attribute rows will force a relcache rebuild, so
    1992             :      * there's nothing else to do here.
    1993             :      */
    1994        2068 :     table_close(attr_rel, RowExclusiveLock);
    1995        2068 : }
    1996             : 
    1997             : /*
    1998             :  * SetAttrMissing
    1999             :  *
    2000             :  * Set the missing value of a single attribute. This should only be used by
    2001             :  * binary upgrade. Takes an AccessExclusive lock on the relation owning the
    2002             :  * attribute.
    2003             :  */
    2004             : void
    2005           4 : SetAttrMissing(Oid relid, char *attname, char *value)
    2006             : {
    2007           4 :     Datum       valuesAtt[Natts_pg_attribute] = {0};
    2008           4 :     bool        nullsAtt[Natts_pg_attribute] = {0};
    2009           4 :     bool        replacesAtt[Natts_pg_attribute] = {0};
    2010             :     Datum       missingval;
    2011             :     Form_pg_attribute attStruct;
    2012             :     Relation    attrrel,
    2013             :                 tablerel;
    2014             :     HeapTuple   atttup,
    2015             :                 newtup;
    2016             : 
    2017             :     /* lock the table the attribute belongs to */
    2018           4 :     tablerel = table_open(relid, AccessExclusiveLock);
    2019             : 
    2020             :     /* Don't do anything unless it's a plain table */
    2021           4 :     if (tablerel->rd_rel->relkind != RELKIND_RELATION)
    2022             :     {
    2023           0 :         table_close(tablerel, AccessExclusiveLock);
    2024           0 :         return;
    2025             :     }
    2026             : 
    2027             :     /* Lock the attribute row and get the data */
    2028           4 :     attrrel = table_open(AttributeRelationId, RowExclusiveLock);
    2029           4 :     atttup = SearchSysCacheAttName(relid, attname);
    2030           4 :     if (!HeapTupleIsValid(atttup))
    2031           0 :         elog(ERROR, "cache lookup failed for attribute %s of relation %u",
    2032             :              attname, relid);
    2033           4 :     attStruct = (Form_pg_attribute) GETSTRUCT(atttup);
    2034             : 
    2035             :     /* get an array value from the value string */
    2036           4 :     missingval = OidFunctionCall3(F_ARRAY_IN,
    2037             :                                   CStringGetDatum(value),
    2038             :                                   ObjectIdGetDatum(attStruct->atttypid),
    2039             :                                   Int32GetDatum(attStruct->atttypmod));
    2040             : 
    2041             :     /* update the tuple - set atthasmissing and attmissingval */
    2042           4 :     valuesAtt[Anum_pg_attribute_atthasmissing - 1] = BoolGetDatum(true);
    2043           4 :     replacesAtt[Anum_pg_attribute_atthasmissing - 1] = true;
    2044           4 :     valuesAtt[Anum_pg_attribute_attmissingval - 1] = missingval;
    2045           4 :     replacesAtt[Anum_pg_attribute_attmissingval - 1] = true;
    2046             : 
    2047           4 :     newtup = heap_modify_tuple(atttup, RelationGetDescr(attrrel),
    2048             :                                valuesAtt, nullsAtt, replacesAtt);
    2049           4 :     CatalogTupleUpdate(attrrel, &newtup->t_self, newtup);
    2050             : 
    2051             :     /* clean up */
    2052           4 :     ReleaseSysCache(atttup);
    2053           4 :     table_close(attrrel, RowExclusiveLock);
    2054           4 :     table_close(tablerel, AccessExclusiveLock);
    2055             : }
    2056             : 
    2057             : /*
    2058             :  * Store a check-constraint expression for the given relation.
    2059             :  *
    2060             :  * Caller is responsible for updating the count of constraints
    2061             :  * in the pg_class entry for the relation.
    2062             :  *
    2063             :  * The OID of the new constraint is returned.
    2064             :  */
    2065             : static Oid
    2066        2114 : StoreRelCheck(Relation rel, const char *ccname, Node *expr,
    2067             :               bool is_validated, bool is_local, int inhcount,
    2068             :               bool is_no_inherit, bool is_internal)
    2069             : {
    2070             :     char       *ccbin;
    2071             :     List       *varList;
    2072             :     int         keycount;
    2073             :     int16      *attNos;
    2074             :     Oid         constrOid;
    2075             : 
    2076             :     /*
    2077             :      * Flatten expression to string form for storage.
    2078             :      */
    2079        2114 :     ccbin = nodeToString(expr);
    2080             : 
    2081             :     /*
    2082             :      * Find columns of rel that are used in expr
    2083             :      *
    2084             :      * NB: pull_var_clause is okay here only because we don't allow subselects
    2085             :      * in check constraints; it would fail to examine the contents of
    2086             :      * subselects.
    2087             :      */
    2088        2114 :     varList = pull_var_clause(expr, 0);
    2089        2114 :     keycount = list_length(varList);
    2090             : 
    2091        2114 :     if (keycount > 0)
    2092             :     {
    2093             :         ListCell   *vl;
    2094        2100 :         int         i = 0;
    2095             : 
    2096        2100 :         attNos = (int16 *) palloc(keycount * sizeof(int16));
    2097        4808 :         foreach(vl, varList)
    2098             :         {
    2099        2708 :             Var        *var = (Var *) lfirst(vl);
    2100             :             int         j;
    2101             : 
    2102        2936 :             for (j = 0; j < i; j++)
    2103         628 :                 if (attNos[j] == var->varattno)
    2104         400 :                     break;
    2105        2708 :             if (j == i)
    2106        2308 :                 attNos[i++] = var->varattno;
    2107             :         }
    2108        2100 :         keycount = i;
    2109             :     }
    2110             :     else
    2111          14 :         attNos = NULL;
    2112             : 
    2113             :     /*
    2114             :      * Partitioned tables do not contain any rows themselves, so a NO INHERIT
    2115             :      * constraint makes no sense.
    2116             :      */
    2117        2114 :     if (is_no_inherit &&
    2118         112 :         rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
    2119          24 :         ereport(ERROR,
    2120             :                 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
    2121             :                  errmsg("cannot add NO INHERIT constraint to partitioned table \"%s\"",
    2122             :                         RelationGetRelationName(rel))));
    2123             : 
    2124             :     /*
    2125             :      * Create the Check Constraint
    2126             :      */
    2127             :     constrOid =
    2128        2090 :         CreateConstraintEntry(ccname,   /* Constraint Name */
    2129        2090 :                               RelationGetNamespace(rel),    /* namespace */
    2130             :                               CONSTRAINT_CHECK, /* Constraint Type */
    2131             :                               false,    /* Is Deferrable */
    2132             :                               false,    /* Is Deferred */
    2133             :                               is_validated,
    2134             :                               InvalidOid,   /* no parent constraint */
    2135             :                               RelationGetRelid(rel),    /* relation */
    2136             :                               attNos,   /* attrs in the constraint */
    2137             :                               keycount, /* # key attrs in the constraint */
    2138             :                               keycount, /* # total attrs in the constraint */
    2139             :                               InvalidOid,   /* not a domain constraint */
    2140             :                               InvalidOid,   /* no associated index */
    2141             :                               InvalidOid,   /* Foreign key fields */
    2142             :                               NULL,
    2143             :                               NULL,
    2144             :                               NULL,
    2145             :                               NULL,
    2146             :                               0,
    2147             :                               ' ',
    2148             :                               ' ',
    2149             :                               NULL,
    2150             :                               0,
    2151             :                               ' ',
    2152             :                               NULL, /* not an exclusion constraint */
    2153             :                               expr, /* Tree form of check constraint */
    2154             :                               ccbin,    /* Binary form of check constraint */
    2155             :                               is_local, /* conislocal */
    2156             :                               inhcount, /* coninhcount */
    2157             :                               is_no_inherit,    /* connoinherit */
    2158             :                               false,    /* conperiod */
    2159             :                               is_internal); /* internally constructed? */
    2160             : 
    2161        2090 :     pfree(ccbin);
    2162             : 
    2163        2090 :     return constrOid;
    2164             : }
    2165             : 
    2166             : /*
    2167             :  * Store a not-null constraint for the given relation
    2168             :  *
    2169             :  * The OID of the new constraint is returned.
    2170             :  */
    2171             : static Oid
    2172        8278 : StoreRelNotNull(Relation rel, const char *nnname, AttrNumber attnum,
    2173             :                 bool is_validated, bool is_local, int inhcount,
    2174             :                 bool is_no_inherit)
    2175             : {
    2176             :     Oid         constrOid;
    2177             : 
    2178             :     constrOid =
    2179        8278 :         CreateConstraintEntry(nnname,
    2180        8278 :                               RelationGetNamespace(rel),
    2181             :                               CONSTRAINT_NOTNULL,
    2182             :                               false,
    2183             :                               false,
    2184             :                               is_validated,
    2185             :                               InvalidOid,
    2186             :                               RelationGetRelid(rel),
    2187             :                               &attnum,
    2188             :                               1,
    2189             :                               1,
    2190             :                               InvalidOid,   /* not a domain constraint */
    2191             :                               InvalidOid,   /* no associated index */
    2192             :                               InvalidOid,   /* Foreign key fields */
    2193             :                               NULL,
    2194             :                               NULL,
    2195             :                               NULL,
    2196             :                               NULL,
    2197             :                               0,
    2198             :                               ' ',
    2199             :                               ' ',
    2200             :                               NULL,
    2201             :                               0,
    2202             :                               ' ',
    2203             :                               NULL, /* not an exclusion constraint */
    2204             :                               NULL,
    2205             :                               NULL,
    2206             :                               is_local,
    2207             :                               inhcount,
    2208             :                               is_no_inherit,
    2209             :                               false,    /* conperiod */
    2210             :                               false);
    2211        8278 :     return constrOid;
    2212             : }
    2213             : 
    2214             : /*
    2215             :  * Store defaults and constraints (passed as a list of CookedConstraint).
    2216             :  *
    2217             :  * Each CookedConstraint struct is modified to store the new catalog tuple OID.
    2218             :  *
    2219             :  * NOTE: only pre-cooked expressions will be passed this way, which is to
    2220             :  * say expressions inherited from an existing relation.  Newly parsed
    2221             :  * expressions can be added later, by direct calls to StoreAttrDefault
    2222             :  * and StoreRelCheck (see AddRelationNewConstraints()).
    2223             :  */
    2224             : static void
    2225       73232 : StoreConstraints(Relation rel, List *cooked_constraints, bool is_internal)
    2226             : {
    2227       73232 :     int         numchecks = 0;
    2228             :     ListCell   *lc;
    2229             : 
    2230       73232 :     if (cooked_constraints == NIL)
    2231       72764 :         return;                 /* nothing to do */
    2232             : 
    2233             :     /*
    2234             :      * Deparsing of constraint expressions will fail unless the just-created
    2235             :      * pg_attribute tuples for this relation are made visible.  So, bump the
    2236             :      * command counter.  CAUTION: this will cause a relcache entry rebuild.
    2237             :      */
    2238         468 :     CommandCounterIncrement();
    2239             : 
    2240        1022 :     foreach(lc, cooked_constraints)
    2241             :     {
    2242         554 :         CookedConstraint *con = (CookedConstraint *) lfirst(lc);
    2243             : 
    2244         554 :         switch (con->contype)
    2245             :         {
    2246         340 :             case CONSTR_DEFAULT:
    2247         340 :                 con->conoid = StoreAttrDefault(rel, con->attnum, con->expr,
    2248             :                                                is_internal, false);
    2249         340 :                 break;
    2250         214 :             case CONSTR_CHECK:
    2251         214 :                 con->conoid =
    2252         214 :                     StoreRelCheck(rel, con->name, con->expr,
    2253         214 :                                   !con->skip_validation, con->is_local,
    2254         214 :                                   con->inhcount, con->is_no_inherit,
    2255         214 :                                   is_internal);
    2256         214 :                 numchecks++;
    2257         214 :                 break;
    2258             : 
    2259           0 :             case CONSTR_NOTNULL:
    2260           0 :                 con->conoid =
    2261           0 :                     StoreRelNotNull(rel, con->name, con->attnum,
    2262           0 :                                     !con->skip_validation, con->is_local,
    2263           0 :                                     con->inhcount, con->is_no_inherit);
    2264           0 :                 break;
    2265             : 
    2266           0 :             default:
    2267           0 :                 elog(ERROR, "unrecognized constraint type: %d",
    2268             :                      (int) con->contype);
    2269             :         }
    2270             :     }
    2271             : 
    2272         468 :     if (numchecks > 0)
    2273         190 :         SetRelationNumChecks(rel, numchecks);
    2274             : }
    2275             : 
    2276             : /*
    2277             :  * AddRelationNewConstraints
    2278             :  *
    2279             :  * Add new column default expressions and/or constraint check expressions
    2280             :  * to an existing relation.  This is defined to do both for efficiency in
    2281             :  * DefineRelation, but of course you can do just one or the other by passing
    2282             :  * empty lists.
    2283             :  *
    2284             :  * rel: relation to be modified
    2285             :  * newColDefaults: list of RawColumnDefault structures
    2286             :  * newConstraints: list of Constraint nodes
    2287             :  * allow_merge: true if check constraints may be merged with existing ones
    2288             :  * is_local: true if definition is local, false if it's inherited
    2289             :  * is_internal: true if result of some internal process, not a user request
    2290             :  * queryString: used during expression transformation of default values and
    2291             :  *      cooked CHECK constraints
    2292             :  *
    2293             :  * All entries in newColDefaults will be processed.  Entries in newConstraints
    2294             :  * will be processed only if they are CONSTR_CHECK type.
    2295             :  *
    2296             :  * Returns a list of CookedConstraint nodes that shows the cooked form of
    2297             :  * the default and constraint expressions added to the relation.
    2298             :  *
    2299             :  * NB: caller should have opened rel with some self-conflicting lock mode,
    2300             :  * and should hold that lock till end of transaction; for normal cases that'll
    2301             :  * be AccessExclusiveLock, but if caller knows that the constraint is already
    2302             :  * enforced by some other means, it can be ShareUpdateExclusiveLock.  Also, we
    2303             :  * assume the caller has done a CommandCounterIncrement if necessary to make
    2304             :  * the relation's catalog tuples visible.
    2305             :  */
    2306             : List *
    2307        6096 : AddRelationNewConstraints(Relation rel,
    2308             :                           List *newColDefaults,
    2309             :                           List *newConstraints,
    2310             :                           bool allow_merge,
    2311             :                           bool is_local,
    2312             :                           bool is_internal,
    2313             :                           const char *queryString)
    2314             : {
    2315        6096 :     List       *cookedConstraints = NIL;
    2316             :     TupleDesc   tupleDesc;
    2317             :     TupleConstr *oldconstr;
    2318             :     int         numoldchecks;
    2319             :     ParseState *pstate;
    2320             :     ParseNamespaceItem *nsitem;
    2321             :     int         numchecks;
    2322             :     List       *checknames;
    2323             :     List       *nnnames;
    2324             :     ListCell   *cell;
    2325             :     Node       *expr;
    2326             :     CookedConstraint *cooked;
    2327             : 
    2328             :     /*
    2329             :      * Get info about existing constraints.
    2330             :      */
    2331        6096 :     tupleDesc = RelationGetDescr(rel);
    2332        6096 :     oldconstr = tupleDesc->constr;
    2333        6096 :     if (oldconstr)
    2334        4542 :         numoldchecks = oldconstr->num_check;
    2335             :     else
    2336        1554 :         numoldchecks = 0;
    2337             : 
    2338             :     /*
    2339             :      * Create a dummy ParseState and insert the target relation as its sole
    2340             :      * rangetable entry.  We need a ParseState for transformExpr.
    2341             :      */
    2342        6096 :     pstate = make_parsestate(NULL);
    2343        6096 :     pstate->p_sourcetext = queryString;
    2344        6096 :     nsitem = addRangeTableEntryForRelation(pstate,
    2345             :                                            rel,
    2346             :                                            AccessShareLock,
    2347             :                                            NULL,
    2348             :                                            false,
    2349             :                                            true);
    2350        6096 :     addNSItemToQuery(pstate, nsitem, true, true, true);
    2351             : 
    2352             :     /*
    2353             :      * Process column default expressions.
    2354             :      */
    2355        9462 :     foreach(cell, newColDefaults)
    2356             :     {
    2357        3486 :         RawColumnDefault *colDef = (RawColumnDefault *) lfirst(cell);
    2358        3486 :         Form_pg_attribute atp = TupleDescAttr(rel->rd_att, colDef->attnum - 1);
    2359             :         Oid         defOid;
    2360             : 
    2361        3486 :         expr = cookDefault(pstate, colDef->raw_default,
    2362             :                            atp->atttypid, atp->atttypmod,
    2363        3486 :                            NameStr(atp->attname),
    2364        3486 :                            atp->attgenerated);
    2365             : 
    2366             :         /*
    2367             :          * If the expression is just a NULL constant, we do not bother to make
    2368             :          * an explicit pg_attrdef entry, since the default behavior is
    2369             :          * equivalent.  This applies to column defaults, but not for
    2370             :          * generation expressions.
    2371             :          *
    2372             :          * Note a nonobvious property of this test: if the column is of a
    2373             :          * domain type, what we'll get is not a bare null Const but a
    2374             :          * CoerceToDomain expr, so we will not discard the default.  This is
    2375             :          * critical because the column default needs to be retained to
    2376             :          * override any default that the domain might have.
    2377             :          */
    2378        3366 :         if (expr == NULL ||
    2379        3366 :             (!colDef->generated &&
    2380        2548 :              IsA(expr, Const) &&
    2381        1246 :              castNode(Const, expr)->constisnull))
    2382         118 :             continue;
    2383             : 
    2384             :         /* If the DEFAULT is volatile we cannot use a missing value */
    2385        3804 :         if (colDef->missingMode &&
    2386         556 :             contain_volatile_functions_after_planning((Expr *) expr))
    2387          78 :             colDef->missingMode = false;
    2388             : 
    2389        3248 :         defOid = StoreAttrDefault(rel, colDef->attnum, expr, is_internal,
    2390        3248 :                                   colDef->missingMode);
    2391             : 
    2392        3248 :         cooked = (CookedConstraint *) palloc(sizeof(CookedConstraint));
    2393        3248 :         cooked->contype = CONSTR_DEFAULT;
    2394        3248 :         cooked->conoid = defOid;
    2395        3248 :         cooked->name = NULL;
    2396        3248 :         cooked->attnum = colDef->attnum;
    2397        3248 :         cooked->expr = expr;
    2398        3248 :         cooked->skip_validation = false;
    2399        3248 :         cooked->is_local = is_local;
    2400        3248 :         cooked->inhcount = is_local ? 0 : 1;
    2401        3248 :         cooked->is_no_inherit = false;
    2402        3248 :         cookedConstraints = lappend(cookedConstraints, cooked);
    2403             :     }
    2404             : 
    2405             :     /*
    2406             :      * Process constraint expressions.
    2407             :      */
    2408        5976 :     numchecks = numoldchecks;
    2409        5976 :     checknames = NIL;
    2410        5976 :     nnnames = NIL;
    2411        8978 :     foreach(cell, newConstraints)
    2412             :     {
    2413        3092 :         Constraint *cdef = (Constraint *) lfirst(cell);
    2414             :         Oid         constrOid;
    2415             : 
    2416        3092 :         if (cdef->contype == CONSTR_CHECK)
    2417             :         {
    2418             :             char       *ccname;
    2419             : 
    2420        2048 :             if (cdef->raw_expr != NULL)
    2421             :             {
    2422             :                 Assert(cdef->cooked_expr == NULL);
    2423             : 
    2424             :                 /*
    2425             :                  * Transform raw parsetree to executable expression, and
    2426             :                  * verify it's valid as a CHECK constraint.
    2427             :                  */
    2428        1818 :                 expr = cookConstraint(pstate, cdef->raw_expr,
    2429        1818 :                                       RelationGetRelationName(rel));
    2430             :             }
    2431             :             else
    2432             :             {
    2433             :                 Assert(cdef->cooked_expr != NULL);
    2434             : 
    2435             :                 /*
    2436             :                  * Here, we assume the parser will only pass us valid CHECK
    2437             :                  * expressions, so we do no particular checking.
    2438             :                  */
    2439         230 :                 expr = stringToNode(cdef->cooked_expr);
    2440             :             }
    2441             : 
    2442             :             /*
    2443             :              * Check name uniqueness, or generate a name if none was given.
    2444             :              */
    2445        2018 :             if (cdef->conname != NULL)
    2446             :             {
    2447             :                 ListCell   *cell2;
    2448             : 
    2449        1368 :                 ccname = cdef->conname;
    2450             :                 /* Check against other new constraints */
    2451             :                 /* Needed because we don't do CommandCounterIncrement in loop */
    2452        1466 :                 foreach(cell2, checknames)
    2453             :                 {
    2454          98 :                     if (strcmp((char *) lfirst(cell2), ccname) == 0)
    2455           0 :                         ereport(ERROR,
    2456             :                                 (errcode(ERRCODE_DUPLICATE_OBJECT),
    2457             :                                  errmsg("check constraint \"%s\" already exists",
    2458             :                                         ccname)));
    2459             :                 }
    2460             : 
    2461             :                 /* save name for future checks */
    2462        1368 :                 checknames = lappend(checknames, ccname);
    2463             : 
    2464             :                 /*
    2465             :                  * Check against pre-existing constraints.  If we are allowed
    2466             :                  * to merge with an existing constraint, there's no more to do
    2467             :                  * here. (We omit the duplicate constraint from the result,
    2468             :                  * which is what ATAddCheckConstraint wants.)
    2469             :                  */
    2470        1344 :                 if (MergeWithExistingConstraint(rel, ccname, expr,
    2471             :                                                 allow_merge, is_local,
    2472        1368 :                                                 cdef->initially_valid,
    2473        1368 :                                                 cdef->is_no_inherit))
    2474          94 :                     continue;
    2475             :             }
    2476             :             else
    2477             :             {
    2478             :                 /*
    2479             :                  * When generating a name, we want to create "tab_col_check"
    2480             :                  * for a column constraint and "tab_check" for a table
    2481             :                  * constraint.  We no longer have any info about the syntactic
    2482             :                  * positioning of the constraint phrase, so we approximate
    2483             :                  * this by seeing whether the expression references more than
    2484             :                  * one column.  (If the user played by the rules, the result
    2485             :                  * is the same...)
    2486             :                  *
    2487             :                  * Note: pull_var_clause() doesn't descend into sublinks, but
    2488             :                  * we eliminated those above; and anyway this only needs to be
    2489             :                  * an approximate answer.
    2490             :                  */
    2491             :                 List       *vars;
    2492             :                 char       *colname;
    2493             : 
    2494         650 :                 vars = pull_var_clause(expr, 0);
    2495             : 
    2496             :                 /* eliminate duplicates */
    2497         650 :                 vars = list_union(NIL, vars);
    2498             : 
    2499         650 :                 if (list_length(vars) == 1)
    2500         578 :                     colname = get_attname(RelationGetRelid(rel),
    2501         578 :                                           ((Var *) linitial(vars))->varattno,
    2502             :                                           true);
    2503             :                 else
    2504          72 :                     colname = NULL;
    2505             : 
    2506         650 :                 ccname = ChooseConstraintName(RelationGetRelationName(rel),
    2507             :                                               colname,
    2508             :                                               "check",
    2509         650 :                                               RelationGetNamespace(rel),
    2510             :                                               checknames);
    2511             : 
    2512             :                 /* save name for future checks */
    2513         650 :                 checknames = lappend(checknames, ccname);
    2514             :             }
    2515             : 
    2516             :             /*
    2517             :              * OK, store it.
    2518             :              */
    2519             :             constrOid =
    2520        1900 :                 StoreRelCheck(rel, ccname, expr, cdef->initially_valid, is_local,
    2521        1900 :                               is_local ? 0 : 1, cdef->is_no_inherit, is_internal);
    2522             : 
    2523        1876 :             numchecks++;
    2524             : 
    2525        1876 :             cooked = (CookedConstraint *) palloc(sizeof(CookedConstraint));
    2526        1876 :             cooked->contype = CONSTR_CHECK;
    2527        1876 :             cooked->conoid = constrOid;
    2528        1876 :             cooked->name = ccname;
    2529        1876 :             cooked->attnum = 0;
    2530        1876 :             cooked->expr = expr;
    2531        1876 :             cooked->skip_validation = cdef->skip_validation;
    2532        1876 :             cooked->is_local = is_local;
    2533        1876 :             cooked->inhcount = is_local ? 0 : 1;
    2534        1876 :             cooked->is_no_inherit = cdef->is_no_inherit;
    2535        1876 :             cookedConstraints = lappend(cookedConstraints, cooked);
    2536             :         }
    2537        1044 :         else if (cdef->contype == CONSTR_NOTNULL)
    2538             :         {
    2539             :             CookedConstraint *nncooked;
    2540             :             AttrNumber  colnum;
    2541             :             char       *nnname;
    2542             : 
    2543             :             /* Determine which column to modify */
    2544        1044 :             colnum = get_attnum(RelationGetRelid(rel), strVal(linitial(cdef->keys)));
    2545        1044 :             if (colnum == InvalidAttrNumber)    /* shouldn't happen */
    2546           0 :                 elog(ERROR, "cache lookup failed for attribute \"%s\" of relation %u",
    2547             :                      strVal(linitial(cdef->keys)), RelationGetRelid(rel));
    2548             : 
    2549             :             /*
    2550             :              * If the column already has a not-null constraint, we need only
    2551             :              * update its catalog status and we're done.
    2552             :              */
    2553        1038 :             if (AdjustNotNullInheritance1(RelationGetRelid(rel), colnum,
    2554        1044 :                                           cdef->inhcount, cdef->is_no_inherit))
    2555          62 :                 continue;
    2556             : 
    2557             :             /*
    2558             :              * If a constraint name is specified, check that it isn't already
    2559             :              * used.  Otherwise, choose a non-conflicting one ourselves.
    2560             :              */
    2561         976 :             if (cdef->conname)
    2562             :             {
    2563         682 :                 if (ConstraintNameIsUsed(CONSTRAINT_RELATION,
    2564             :                                          RelationGetRelid(rel),
    2565         682 :                                          cdef->conname))
    2566           6 :                     ereport(ERROR,
    2567             :                             errcode(ERRCODE_DUPLICATE_OBJECT),
    2568             :                             errmsg("constraint \"%s\" for relation \"%s\" already exists",
    2569             :                                    cdef->conname, RelationGetRelationName(rel)));
    2570         676 :                 nnname = cdef->conname;
    2571             :             }
    2572             :             else
    2573         588 :                 nnname = ChooseConstraintName(RelationGetRelationName(rel),
    2574         294 :                                               strVal(linitial(cdef->keys)),
    2575             :                                               "not_null",
    2576         294 :                                               RelationGetNamespace(rel),
    2577             :                                               nnnames);
    2578         970 :             nnnames = lappend(nnnames, nnname);
    2579             : 
    2580             :             constrOid =
    2581         970 :                 StoreRelNotNull(rel, nnname, colnum,
    2582         970 :                                 cdef->initially_valid,
    2583         970 :                                 cdef->inhcount == 0,
    2584             :                                 cdef->inhcount,
    2585         970 :                                 cdef->is_no_inherit);
    2586             : 
    2587         970 :             nncooked = (CookedConstraint *) palloc(sizeof(CookedConstraint));
    2588         970 :             nncooked->contype = CONSTR_NOTNULL;
    2589         970 :             nncooked->conoid = constrOid;
    2590         970 :             nncooked->name = nnname;
    2591         970 :             nncooked->attnum = colnum;
    2592         970 :             nncooked->expr = NULL;
    2593         970 :             nncooked->skip_validation = cdef->skip_validation;
    2594         970 :             nncooked->is_local = is_local;
    2595         970 :             nncooked->inhcount = cdef->inhcount;
    2596         970 :             nncooked->is_no_inherit = cdef->is_no_inherit;
    2597             : 
    2598         970 :             cookedConstraints = lappend(cookedConstraints, nncooked);
    2599             :         }
    2600             :     }
    2601             : 
    2602             :     /*
    2603             :      * Update the count of constraints in the relation's pg_class tuple. We do
    2604             :      * this even if there was no change, in order to ensure that an SI update
    2605             :      * message is sent out for the pg_class tuple, which will force other
    2606             :      * backends to rebuild their relcache entries for the rel. (This is
    2607             :      * critical if we added defaults but not constraints.)
    2608             :      */
    2609        5886 :     SetRelationNumChecks(rel, numchecks);
    2610             : 
    2611        5886 :     return cookedConstraints;
    2612             : }
    2613             : 
    2614             : /*
    2615             :  * Check for a pre-existing check constraint that conflicts with a proposed
    2616             :  * new one, and either adjust its conislocal/coninhcount settings or throw
    2617             :  * error as needed.
    2618             :  *
    2619             :  * Returns true if merged (constraint is a duplicate), or false if it's
    2620             :  * got a so-far-unique name, or throws error if conflict.
    2621             :  *
    2622             :  * XXX See MergeConstraintsIntoExisting too if you change this code.
    2623             :  */
    2624             : static bool
    2625        1368 : MergeWithExistingConstraint(Relation rel, const char *ccname, Node *expr,
    2626             :                             bool allow_merge, bool is_local,
    2627             :                             bool is_initially_valid,
    2628             :                             bool is_no_inherit)
    2629             : {
    2630             :     bool        found;
    2631             :     Relation    conDesc;
    2632             :     SysScanDesc conscan;
    2633             :     ScanKeyData skey[3];
    2634             :     HeapTuple   tup;
    2635             : 
    2636             :     /* Search for a pg_constraint entry with same name and relation */
    2637        1368 :     conDesc = table_open(ConstraintRelationId, RowExclusiveLock);
    2638             : 
    2639        1368 :     found = false;
    2640             : 
    2641        1368 :     ScanKeyInit(&skey[0],
    2642             :                 Anum_pg_constraint_conrelid,
    2643             :                 BTEqualStrategyNumber, F_OIDEQ,
    2644             :                 ObjectIdGetDatum(RelationGetRelid(rel)));
    2645        1368 :     ScanKeyInit(&skey[1],
    2646             :                 Anum_pg_constraint_contypid,
    2647             :                 BTEqualStrategyNumber, F_OIDEQ,
    2648             :                 ObjectIdGetDatum(InvalidOid));
    2649        1368 :     ScanKeyInit(&skey[2],
    2650             :                 Anum_pg_constraint_conname,
    2651             :                 BTEqualStrategyNumber, F_NAMEEQ,
    2652             :                 CStringGetDatum(ccname));
    2653             : 
    2654        1368 :     conscan = systable_beginscan(conDesc, ConstraintRelidTypidNameIndexId, true,
    2655             :                                  NULL, 3, skey);
    2656             : 
    2657             :     /* There can be at most one matching row */
    2658        1368 :     if (HeapTupleIsValid(tup = systable_getnext(conscan)))
    2659             :     {
    2660         118 :         Form_pg_constraint con = (Form_pg_constraint) GETSTRUCT(tup);
    2661             : 
    2662             :         /* Found it.  Conflicts if not identical check constraint */
    2663         118 :         if (con->contype == CONSTRAINT_CHECK)
    2664             :         {
    2665             :             Datum       val;
    2666             :             bool        isnull;
    2667             : 
    2668         112 :             val = fastgetattr(tup,
    2669             :                               Anum_pg_constraint_conbin,
    2670             :                               conDesc->rd_att, &isnull);
    2671         112 :             if (isnull)
    2672           0 :                 elog(ERROR, "null conbin for rel %s",
    2673             :                      RelationGetRelationName(rel));
    2674         112 :             if (equal(expr, stringToNode(TextDatumGetCString(val))))
    2675         106 :                 found = true;
    2676             :         }
    2677             : 
    2678             :         /*
    2679             :          * If the existing constraint is purely inherited (no local
    2680             :          * definition) then interpret addition of a local constraint as a
    2681             :          * legal merge.  This allows ALTER ADD CONSTRAINT on parent and child
    2682             :          * tables to be given in either order with same end state.  However if
    2683             :          * the relation is a partition, all inherited constraints are always
    2684             :          * non-local, including those that were merged.
    2685             :          */
    2686         118 :         if (is_local && !con->conislocal && !rel->rd_rel->relispartition)
    2687          54 :             allow_merge = true;
    2688             : 
    2689         118 :         if (!found || !allow_merge)
    2690          12 :             ereport(ERROR,
    2691             :                     (errcode(ERRCODE_DUPLICATE_OBJECT),
    2692             :                      errmsg("constraint \"%s\" for relation \"%s\" already exists",
    2693             :                             ccname, RelationGetRelationName(rel))));
    2694             : 
    2695             :         /* If the child constraint is "no inherit" then cannot merge */
    2696         106 :         if (con->connoinherit)
    2697           0 :             ereport(ERROR,
    2698             :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    2699             :                      errmsg("constraint \"%s\" conflicts with non-inherited constraint on relation \"%s\"",
    2700             :                             ccname, RelationGetRelationName(rel))));
    2701             : 
    2702             :         /*
    2703             :          * Must not change an existing inherited constraint to "no inherit"
    2704             :          * status.  That's because inherited constraints should be able to
    2705             :          * propagate to lower-level children.
    2706             :          */
    2707         106 :         if (con->coninhcount > 0 && is_no_inherit)
    2708           6 :             ereport(ERROR,
    2709             :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    2710             :                      errmsg("constraint \"%s\" conflicts with inherited constraint on relation \"%s\"",
    2711             :                             ccname, RelationGetRelationName(rel))));
    2712             : 
    2713             :         /*
    2714             :          * If the child constraint is "not valid" then cannot merge with a
    2715             :          * valid parent constraint.
    2716             :          */
    2717         100 :         if (is_initially_valid && !con->convalidated)
    2718           6 :             ereport(ERROR,
    2719             :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    2720             :                      errmsg("constraint \"%s\" conflicts with NOT VALID constraint on relation \"%s\"",
    2721             :                             ccname, RelationGetRelationName(rel))));
    2722             : 
    2723             :         /* OK to update the tuple */
    2724          94 :         ereport(NOTICE,
    2725             :                 (errmsg("merging constraint \"%s\" with inherited definition",
    2726             :                         ccname)));
    2727             : 
    2728          94 :         tup = heap_copytuple(tup);
    2729          94 :         con = (Form_pg_constraint) GETSTRUCT(tup);
    2730             : 
    2731             :         /*
    2732             :          * In case of partitions, an inherited constraint must be inherited
    2733             :          * only once since it cannot have multiple parents and it is never
    2734             :          * considered local.
    2735             :          */
    2736          94 :         if (rel->rd_rel->relispartition)
    2737             :         {
    2738          12 :             con->coninhcount = 1;
    2739          12 :             con->conislocal = false;
    2740             :         }
    2741             :         else
    2742             :         {
    2743          82 :             if (is_local)
    2744          48 :                 con->conislocal = true;
    2745             :             else
    2746          34 :                 con->coninhcount++;
    2747             : 
    2748          82 :             if (con->coninhcount < 0)
    2749           0 :                 ereport(ERROR,
    2750             :                         errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
    2751             :                         errmsg("too many inheritance parents"));
    2752             :         }
    2753             : 
    2754          94 :         if (is_no_inherit)
    2755             :         {
    2756             :             Assert(is_local);
    2757           0 :             con->connoinherit = true;
    2758             :         }
    2759             : 
    2760          94 :         CatalogTupleUpdate(conDesc, &tup->t_self, tup);
    2761             :     }
    2762             : 
    2763        1344 :     systable_endscan(conscan);
    2764        1344 :     table_close(conDesc, RowExclusiveLock);
    2765             : 
    2766        1344 :     return found;
    2767             : }
    2768             : 
    2769             : /* list_sort comparator to sort CookedConstraint by attnum */
    2770             : static int
    2771         278 : list_cookedconstr_attnum_cmp(const ListCell *p1, const ListCell *p2)
    2772             : {
    2773         278 :     AttrNumber  v1 = ((CookedConstraint *) lfirst(p1))->attnum;
    2774         278 :     AttrNumber  v2 = ((CookedConstraint *) lfirst(p2))->attnum;
    2775             : 
    2776         278 :     return pg_cmp_s16(v1, v2);
    2777             : }
    2778             : 
    2779             : /*
    2780             :  * Create the not-null constraints when creating a new relation
    2781             :  *
    2782             :  * These come from two sources: the 'constraints' list (of Constraint) is
    2783             :  * specified directly by the user; the 'old_notnulls' list (of
    2784             :  * CookedConstraint) comes from inheritance.  We create one constraint
    2785             :  * for each column, giving priority to user-specified ones, and setting
    2786             :  * inhcount according to how many parents cause each column to get a
    2787             :  * not-null constraint.  If a user-specified name clashes with another
    2788             :  * user-specified name, an error is raised.
    2789             :  *
    2790             :  * Note that inherited constraints have two shapes: those coming from another
    2791             :  * not-null constraint in the parent, which have a name already, and those
    2792             :  * coming from a primary key in the parent, which don't.  Any name specified
    2793             :  * in a parent is disregarded in case of a conflict.
    2794             :  *
    2795             :  * Returns a list of AttrNumber for columns that need to have the attnotnull
    2796             :  * flag set.
    2797             :  */
    2798             : List *
    2799       50484 : AddRelationNotNullConstraints(Relation rel, List *constraints,
    2800             :                               List *old_notnulls)
    2801             : {
    2802             :     List       *givennames;
    2803             :     List       *nnnames;
    2804       50484 :     List       *nncols = NIL;
    2805             :     ListCell   *lc;
    2806             : 
    2807             :     /*
    2808             :      * We track two lists of names: nnnames keeps all the constraint names,
    2809             :      * givennames tracks user-generated names.  The distinction is important,
    2810             :      * because we must raise error for user-generated name conflicts, but for
    2811             :      * system-generated name conflicts we just generate another.
    2812             :      */
    2813       50484 :     nnnames = NIL;
    2814       50484 :     givennames = NIL;
    2815             : 
    2816             :     /*
    2817             :      * First, create all not-null constraints that are directly specified by
    2818             :      * the user.  Note that inheritance might have given us another source for
    2819             :      * each, so we must scan the old_notnulls list and increment inhcount for
    2820             :      * each element with identical attnum.  We delete from there any element
    2821             :      * that we process.
    2822             :      */
    2823       56978 :     foreach(lc, constraints)
    2824             :     {
    2825        6506 :         Constraint *constr = lfirst_node(Constraint, lc);
    2826             :         AttrNumber  attnum;
    2827             :         char       *conname;
    2828        6506 :         bool        is_local = true;
    2829        6506 :         int         inhcount = 0;
    2830             :         ListCell   *lc2;
    2831             : 
    2832             :         Assert(constr->contype == CONSTR_NOTNULL);
    2833             : 
    2834        6506 :         attnum = get_attnum(RelationGetRelid(rel),
    2835        6506 :                             strVal(linitial(constr->keys)));
    2836             : 
    2837             :         /*
    2838             :          * Search in the list of inherited constraints for any entries on the
    2839             :          * same column.
    2840             :          */
    2841        6568 :         foreach(lc2, old_notnulls)
    2842             :         {
    2843          68 :             CookedConstraint *old = (CookedConstraint *) lfirst(lc2);
    2844             : 
    2845          68 :             if (old->attnum == attnum)
    2846             :             {
    2847             :                 /*
    2848             :                  * If we get a constraint from the parent, having a local NO
    2849             :                  * INHERIT one doesn't work.
    2850             :                  */
    2851          44 :                 if (constr->is_no_inherit)
    2852           6 :                     ereport(ERROR,
    2853             :                             (errcode(ERRCODE_DATATYPE_MISMATCH),
    2854             :                              errmsg("cannot define not-null constraint on column \"%s\" with NO INHERIT",
    2855             :                                     strVal(linitial(constr->keys))),
    2856             :                              errdetail("The column has an inherited not-null constraint.")));
    2857             : 
    2858          38 :                 inhcount++;
    2859          38 :                 old_notnulls = foreach_delete_current(old_notnulls, lc2);
    2860             :             }
    2861             :         }
    2862             : 
    2863             :         /*
    2864             :          * Determine a constraint name, which may have been specified by the
    2865             :          * user, or raise an error if a conflict exists with another
    2866             :          * user-specified name.
    2867             :          */
    2868        6500 :         if (constr->conname)
    2869             :         {
    2870         388 :             foreach(lc2, givennames)
    2871             :             {
    2872          74 :                 if (strcmp(lfirst(lc2), constr->conname) == 0)
    2873           6 :                     ereport(ERROR,
    2874             :                             errcode(ERRCODE_DUPLICATE_OBJECT),
    2875             :                             errmsg("constraint \"%s\" for relation \"%s\" already exists",
    2876             :                                    constr->conname,
    2877             :                                    RelationGetRelationName(rel)));
    2878             :             }
    2879             : 
    2880         314 :             conname = constr->conname;
    2881         314 :             givennames = lappend(givennames, conname);
    2882             :         }
    2883             :         else
    2884        6180 :             conname = ChooseConstraintName(RelationGetRelationName(rel),
    2885        6180 :                                            get_attname(RelationGetRelid(rel),
    2886             :                                                        attnum, false),
    2887             :                                            "not_null",
    2888        6180 :                                            RelationGetNamespace(rel),
    2889             :                                            nnnames);
    2890        6494 :         nnnames = lappend(nnnames, conname);
    2891             : 
    2892        6494 :         StoreRelNotNull(rel, conname,
    2893             :                         attnum, true, is_local,
    2894        6494 :                         inhcount, constr->is_no_inherit);
    2895             : 
    2896        6494 :         nncols = lappend_int(nncols, attnum);
    2897             :     }
    2898             : 
    2899             :     /*
    2900             :      * If any column remains in the old_notnulls list, we must create a not-
    2901             :      * null constraint marked not-local.  Because multiple parents could
    2902             :      * specify a not-null constraint for the same column, we must count how
    2903             :      * many there are and add to the original inhcount accordingly, deleting
    2904             :      * elements we've already processed.  We sort the list to make it easy.
    2905             :      *
    2906             :      * We don't use foreach() here because we have two nested loops over the
    2907             :      * constraint list, with possible element deletions in the inner one. If
    2908             :      * we used foreach_delete_current() it could only fix up the state of one
    2909             :      * of the loops, so it seems cleaner to use looping over list indexes for
    2910             :      * both loops.  Note that any deletion will happen beyond where the outer
    2911             :      * loop is, so its index never needs adjustment.
    2912             :      */
    2913       50472 :     list_sort(old_notnulls, list_cookedconstr_attnum_cmp);
    2914       51286 :     for (int outerpos = 0; outerpos < list_length(old_notnulls); outerpos++)
    2915             :     {
    2916             :         CookedConstraint *cooked;
    2917         814 :         char       *conname = NULL;
    2918         814 :         int         add_inhcount = 0;
    2919             :         ListCell   *lc2;
    2920             : 
    2921         814 :         cooked = (CookedConstraint *) list_nth(old_notnulls, outerpos);
    2922             :         Assert(cooked->contype == CONSTR_NOTNULL);
    2923             : 
    2924             :         /*
    2925             :          * Preserve the first non-conflicting constraint name we come across,
    2926             :          * if any
    2927             :          */
    2928         814 :         if (conname == NULL && cooked->name)
    2929         618 :             conname = cooked->name;
    2930             : 
    2931        1110 :         for (int restpos = outerpos + 1; restpos < list_length(old_notnulls);)
    2932             :         {
    2933             :             CookedConstraint *other;
    2934             : 
    2935         296 :             other = (CookedConstraint *) list_nth(old_notnulls, restpos);
    2936         296 :             if (other->attnum == cooked->attnum)
    2937             :             {
    2938          84 :                 if (conname == NULL && other->name)
    2939          52 :                     conname = other->name;
    2940             : 
    2941          84 :                 add_inhcount++;
    2942          84 :                 old_notnulls = list_delete_nth_cell(old_notnulls, restpos);
    2943             :             }
    2944             :             else
    2945         212 :                 restpos++;
    2946             :         }
    2947             : 
    2948             :         /* If we got a name, make sure it isn't one we've already used */
    2949         814 :         if (conname != NULL)
    2950             :         {
    2951         864 :             foreach(lc2, nnnames)
    2952             :             {
    2953         200 :                 if (strcmp(lfirst(lc2), conname) == 0)
    2954             :                 {
    2955           6 :                     conname = NULL;
    2956           6 :                     break;
    2957             :                 }
    2958             :             }
    2959             :         }
    2960             : 
    2961             :         /* and choose a name, if needed */
    2962         814 :         if (conname == NULL)
    2963         150 :             conname = ChooseConstraintName(RelationGetRelationName(rel),
    2964         150 :                                            get_attname(RelationGetRelid(rel),
    2965         150 :                                                        cooked->attnum, false),
    2966             :                                            "not_null",
    2967         150 :                                            RelationGetNamespace(rel),
    2968             :                                            nnnames);
    2969         814 :         nnnames = lappend(nnnames, conname);
    2970             : 
    2971         814 :         StoreRelNotNull(rel, conname, cooked->attnum, true,
    2972         814 :                         cooked->is_local, cooked->inhcount + add_inhcount,
    2973         814 :                         cooked->is_no_inherit);
    2974             : 
    2975         814 :         nncols = lappend_int(nncols, cooked->attnum);
    2976             :     }
    2977             : 
    2978       50472 :     return nncols;
    2979             : }
    2980             : 
    2981             : /*
    2982             :  * Update the count of constraints in the relation's pg_class tuple.
    2983             :  *
    2984             :  * Caller had better hold exclusive lock on the relation.
    2985             :  *
    2986             :  * An important side effect is that a SI update message will be sent out for
    2987             :  * the pg_class tuple, which will force other backends to rebuild their
    2988             :  * relcache entries for the rel.  Also, this backend will rebuild its
    2989             :  * own relcache entry at the next CommandCounterIncrement.
    2990             :  */
    2991             : static void
    2992        6076 : SetRelationNumChecks(Relation rel, int numchecks)
    2993             : {
    2994             :     Relation    relrel;
    2995             :     HeapTuple   reltup;
    2996             :     Form_pg_class relStruct;
    2997             : 
    2998        6076 :     relrel = table_open(RelationRelationId, RowExclusiveLock);
    2999        6076 :     reltup = SearchSysCacheCopy1(RELOID,
    3000             :                                  ObjectIdGetDatum(RelationGetRelid(rel)));
    3001        6076 :     if (!HeapTupleIsValid(reltup))
    3002           0 :         elog(ERROR, "cache lookup failed for relation %u",
    3003             :              RelationGetRelid(rel));
    3004        6076 :     relStruct = (Form_pg_class) GETSTRUCT(reltup);
    3005             : 
    3006        6076 :     if (relStruct->relchecks != numchecks)
    3007             :     {
    3008        1948 :         relStruct->relchecks = numchecks;
    3009             : 
    3010        1948 :         CatalogTupleUpdate(relrel, &reltup->t_self, reltup);
    3011             :     }
    3012             :     else
    3013             :     {
    3014             :         /* Skip the disk update, but force relcache inval anyway */
    3015        4128 :         CacheInvalidateRelcache(rel);
    3016             :     }
    3017             : 
    3018        6076 :     heap_freetuple(reltup);
    3019        6076 :     table_close(relrel, RowExclusiveLock);
    3020        6076 : }
    3021             : 
    3022             : /*
    3023             :  * Check for references to generated columns
    3024             :  */
    3025             : static bool
    3026        2818 : check_nested_generated_walker(Node *node, void *context)
    3027             : {
    3028        2818 :     ParseState *pstate = context;
    3029             : 
    3030        2818 :     if (node == NULL)
    3031           0 :         return false;
    3032        2818 :     else if (IsA(node, Var))
    3033             :     {
    3034        1046 :         Var        *var = (Var *) node;
    3035             :         Oid         relid;
    3036             :         AttrNumber  attnum;
    3037             : 
    3038        1046 :         relid = rt_fetch(var->varno, pstate->p_rtable)->relid;
    3039        1046 :         if (!OidIsValid(relid))
    3040           0 :             return false;       /* XXX shouldn't we raise an error? */
    3041             : 
    3042        1046 :         attnum = var->varattno;
    3043             : 
    3044        1046 :         if (attnum > 0 && get_attgenerated(relid, attnum))
    3045          18 :             ereport(ERROR,
    3046             :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    3047             :                      errmsg("cannot use generated column \"%s\" in column generation expression",
    3048             :                             get_attname(relid, attnum, false)),
    3049             :                      errdetail("A generated column cannot reference another generated column."),
    3050             :                      parser_errposition(pstate, var->location)));
    3051             :         /* A whole-row Var is necessarily self-referential, so forbid it */
    3052        1028 :         if (attnum == 0)
    3053           6 :             ereport(ERROR,
    3054             :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    3055             :                      errmsg("cannot use whole-row variable in column generation expression"),
    3056             :                      errdetail("This would cause the generated column to depend on its own value."),
    3057             :                      parser_errposition(pstate, var->location)));
    3058             :         /* System columns were already checked in the parser */
    3059             : 
    3060        1022 :         return false;
    3061             :     }
    3062             :     else
    3063        1772 :         return expression_tree_walker(node, check_nested_generated_walker,
    3064             :                                       (void *) context);
    3065             : }
    3066             : 
    3067             : static void
    3068         848 : check_nested_generated(ParseState *pstate, Node *node)
    3069             : {
    3070         848 :     check_nested_generated_walker(node, pstate);
    3071         824 : }
    3072             : 
    3073             : /*
    3074             :  * Take a raw default and convert it to a cooked format ready for
    3075             :  * storage.
    3076             :  *
    3077             :  * Parse state should be set up to recognize any vars that might appear
    3078             :  * in the expression.  (Even though we plan to reject vars, it's more
    3079             :  * user-friendly to give the correct error message than "unknown var".)
    3080             :  *
    3081             :  * If atttypid is not InvalidOid, coerce the expression to the specified
    3082             :  * type (and typmod atttypmod).   attname is only needed in this case:
    3083             :  * it is used in the error message, if any.
    3084             :  */
    3085             : Node *
    3086        3612 : cookDefault(ParseState *pstate,
    3087             :             Node *raw_default,
    3088             :             Oid atttypid,
    3089             :             int32 atttypmod,
    3090             :             const char *attname,
    3091             :             char attgenerated)
    3092             : {
    3093             :     Node       *expr;
    3094             : 
    3095             :     Assert(raw_default != NULL);
    3096             : 
    3097             :     /*
    3098             :      * Transform raw parsetree to executable expression.
    3099             :      */
    3100        3612 :     expr = transformExpr(pstate, raw_default, attgenerated ? EXPR_KIND_GENERATED_COLUMN : EXPR_KIND_COLUMN_DEFAULT);
    3101             : 
    3102        3528 :     if (attgenerated)
    3103             :     {
    3104             :         /* Disallow refs to other generated columns */
    3105         848 :         check_nested_generated(pstate, expr);
    3106             : 
    3107             :         /* Disallow mutable functions */
    3108         824 :         if (contain_mutable_functions_after_planning((Expr *) expr))
    3109           6 :             ereport(ERROR,
    3110             :                     (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
    3111             :                      errmsg("generation expression is not immutable")));
    3112             :     }
    3113             :     else
    3114             :     {
    3115             :         /*
    3116             :          * For a default expression, transformExpr() should have rejected
    3117             :          * column references.
    3118             :          */
    3119             :         Assert(!contain_var_clause(expr));
    3120             :     }
    3121             : 
    3122             :     /*
    3123             :      * Coerce the expression to the correct type and typmod, if given. This
    3124             :      * should match the parser's processing of non-defaulted expressions ---
    3125             :      * see transformAssignedExpr().
    3126             :      */
    3127        3498 :     if (OidIsValid(atttypid))
    3128             :     {
    3129        3498 :         Oid         type_id = exprType(expr);
    3130             : 
    3131        3498 :         expr = coerce_to_target_type(pstate, expr, type_id,
    3132             :                                      atttypid, atttypmod,
    3133             :                                      COERCION_ASSIGNMENT,
    3134             :                                      COERCE_IMPLICIT_CAST,
    3135             :                                      -1);
    3136        3492 :         if (expr == NULL)
    3137           0 :             ereport(ERROR,
    3138             :                     (errcode(ERRCODE_DATATYPE_MISMATCH),
    3139             :                      errmsg("column \"%s\" is of type %s"
    3140             :                             " but default expression is of type %s",
    3141             :                             attname,
    3142             :                             format_type_be(atttypid),
    3143             :                             format_type_be(type_id)),
    3144             :                      errhint("You will need to rewrite or cast the expression.")));
    3145             :     }
    3146             : 
    3147             :     /*
    3148             :      * Finally, take care of collations in the finished expression.
    3149             :      */
    3150        3492 :     assign_expr_collations(pstate, expr);
    3151             : 
    3152        3492 :     return expr;
    3153             : }
    3154             : 
    3155             : /*
    3156             :  * Take a raw CHECK constraint expression and convert it to a cooked format
    3157             :  * ready for storage.
    3158             :  *
    3159             :  * Parse state must be set up to recognize any vars that might appear
    3160             :  * in the expression.
    3161             :  */
    3162             : static Node *
    3163        1818 : cookConstraint(ParseState *pstate,
    3164             :                Node *raw_constraint,
    3165             :                char *relname)
    3166             : {
    3167             :     Node       *expr;
    3168             : 
    3169             :     /*
    3170             :      * Transform raw parsetree to executable expression.
    3171             :      */
    3172        1818 :     expr = transformExpr(pstate, raw_constraint, EXPR_KIND_CHECK_CONSTRAINT);
    3173             : 
    3174             :     /*
    3175             :      * Make sure it yields a boolean result.
    3176             :      */
    3177        1788 :     expr = coerce_to_boolean(pstate, expr, "CHECK");
    3178             : 
    3179             :     /*
    3180             :      * Take care of collations.
    3181             :      */
    3182        1788 :     assign_expr_collations(pstate, expr);
    3183             : 
    3184             :     /*
    3185             :      * Make sure no outside relations are referred to (this is probably dead
    3186             :      * code now that add_missing_from is history).
    3187             :      */
    3188        1788 :     if (list_length(pstate->p_rtable) != 1)
    3189           0 :         ereport(ERROR,
    3190             :                 (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
    3191             :                  errmsg("only table \"%s\" can be referenced in check constraint",
    3192             :                         relname)));
    3193             : 
    3194        1788 :     return expr;
    3195             : }
    3196             : 
    3197             : /*
    3198             :  * CopyStatistics --- copy entries in pg_statistic from one rel to another
    3199             :  */
    3200             : void
    3201         466 : CopyStatistics(Oid fromrelid, Oid torelid)
    3202             : {
    3203             :     HeapTuple   tup;
    3204             :     SysScanDesc scan;
    3205             :     ScanKeyData key[1];
    3206             :     Relation    statrel;
    3207         466 :     CatalogIndexState indstate = NULL;
    3208             : 
    3209         466 :     statrel = table_open(StatisticRelationId, RowExclusiveLock);
    3210             : 
    3211             :     /* Now search for stat records */
    3212         466 :     ScanKeyInit(&key[0],
    3213             :                 Anum_pg_statistic_starelid,
    3214             :                 BTEqualStrategyNumber, F_OIDEQ,
    3215             :                 ObjectIdGetDatum(fromrelid));
    3216             : 
    3217         466 :     scan = systable_beginscan(statrel, StatisticRelidAttnumInhIndexId,
    3218             :                               true, NULL, 1, key);
    3219             : 
    3220         472 :     while (HeapTupleIsValid((tup = systable_getnext(scan))))
    3221             :     {
    3222             :         Form_pg_statistic statform;
    3223             : 
    3224             :         /* make a modifiable copy */
    3225           6 :         tup = heap_copytuple(tup);
    3226           6 :         statform = (Form_pg_statistic) GETSTRUCT(tup);
    3227             : 
    3228             :         /* update the copy of the tuple and insert it */
    3229           6 :         statform->starelid = torelid;
    3230             : 
    3231             :         /* fetch index information when we know we need it */
    3232           6 :         if (indstate == NULL)
    3233           6 :             indstate = CatalogOpenIndexes(statrel);
    3234             : 
    3235           6 :         CatalogTupleInsertWithInfo(statrel, tup, indstate);
    3236             : 
    3237           6 :         heap_freetuple(tup);
    3238             :     }
    3239             : 
    3240         466 :     systable_endscan(scan);
    3241             : 
    3242         466 :     if (indstate != NULL)
    3243           6 :         CatalogCloseIndexes(indstate);
    3244         466 :     table_close(statrel, RowExclusiveLock);
    3245         466 : }
    3246             : 
    3247             : /*
    3248             :  * RemoveStatistics --- remove entries in pg_statistic for a rel or column
    3249             :  *
    3250             :  * If attnum is zero, remove all entries for rel; else remove only the one(s)
    3251             :  * for that column.
    3252             :  */
    3253             : void
    3254       44074 : RemoveStatistics(Oid relid, AttrNumber attnum)
    3255             : {
    3256             :     Relation    pgstatistic;
    3257             :     SysScanDesc scan;
    3258             :     ScanKeyData key[2];
    3259             :     int         nkeys;
    3260             :     HeapTuple   tuple;
    3261             : 
    3262       44074 :     pgstatistic = table_open(StatisticRelationId, RowExclusiveLock);
    3263             : 
    3264       44074 :     ScanKeyInit(&key[0],
    3265             :                 Anum_pg_statistic_starelid,
    3266             :                 BTEqualStrategyNumber, F_OIDEQ,
    3267             :                 ObjectIdGetDatum(relid));
    3268             : 
    3269       44074 :     if (attnum == 0)
    3270       41118 :         nkeys = 1;
    3271             :     else
    3272             :     {
    3273        2956 :         ScanKeyInit(&key[1],
    3274             :                     Anum_pg_statistic_staattnum,
    3275             :                     BTEqualStrategyNumber, F_INT2EQ,
    3276             :                     Int16GetDatum(attnum));
    3277        2956 :         nkeys = 2;
    3278             :     }
    3279             : 
    3280       44074 :     scan = systable_beginscan(pgstatistic, StatisticRelidAttnumInhIndexId, true,
    3281             :                               NULL, nkeys, key);
    3282             : 
    3283             :     /* we must loop even when attnum != 0, in case of inherited stats */
    3284       46890 :     while (HeapTupleIsValid(tuple = systable_getnext(scan)))
    3285        2816 :         CatalogTupleDelete(pgstatistic, &tuple->t_self);
    3286             : 
    3287       44074 :     systable_endscan(scan);
    3288             : 
    3289       44074 :     table_close(pgstatistic, RowExclusiveLock);
    3290       44074 : }
    3291             : 
    3292             : 
    3293             : /*
    3294             :  * RelationTruncateIndexes - truncate all indexes associated
    3295             :  * with the heap relation to zero tuples.
    3296             :  *
    3297             :  * The routine will truncate and then reconstruct the indexes on
    3298             :  * the specified relation.  Caller must hold exclusive lock on rel.
    3299             :  */
    3300             : static void
    3301         576 : RelationTruncateIndexes(Relation heapRelation)
    3302             : {
    3303             :     ListCell   *indlist;
    3304             : 
    3305             :     /* Ask the relcache to produce a list of the indexes of the rel */
    3306         780 :     foreach(indlist, RelationGetIndexList(heapRelation))
    3307             :     {
    3308         204 :         Oid         indexId = lfirst_oid(indlist);
    3309             :         Relation    currentIndex;
    3310             :         IndexInfo  *indexInfo;
    3311             : 
    3312             :         /* Open the index relation; use exclusive lock, just to be sure */
    3313         204 :         currentIndex = index_open(indexId, AccessExclusiveLock);
    3314             : 
    3315             :         /*
    3316             :          * Fetch info needed for index_build.  Since we know there are no
    3317             :          * tuples that actually need indexing, we can use a dummy IndexInfo.
    3318             :          * This is slightly cheaper to build, but the real point is to avoid
    3319             :          * possibly running user-defined code in index expressions or
    3320             :          * predicates.  We might be getting invoked during ON COMMIT
    3321             :          * processing, and we don't want to run any such code then.
    3322             :          */
    3323         204 :         indexInfo = BuildDummyIndexInfo(currentIndex);
    3324             : 
    3325             :         /*
    3326             :          * Now truncate the actual file (and discard buffers).
    3327             :          */
    3328         204 :         RelationTruncate(currentIndex, 0);
    3329             : 
    3330             :         /* Initialize the index and rebuild */
    3331             :         /* Note: we do not need to re-establish pkey setting */
    3332         204 :         index_build(heapRelation, currentIndex, indexInfo, true, false);
    3333             : 
    3334             :         /* We're done with this index */
    3335         204 :         index_close(currentIndex, NoLock);
    3336             :     }
    3337         576 : }
    3338             : 
    3339             : /*
    3340             :  *   heap_truncate
    3341             :  *
    3342             :  *   This routine deletes all data within all the specified relations.
    3343             :  *
    3344             :  * This is not transaction-safe!  There is another, transaction-safe
    3345             :  * implementation in commands/tablecmds.c.  We now use this only for
    3346             :  * ON COMMIT truncation of temporary tables, where it doesn't matter.
    3347             :  */
    3348             : void
    3349         334 : heap_truncate(List *relids)
    3350             : {
    3351         334 :     List       *relations = NIL;
    3352             :     ListCell   *cell;
    3353             : 
    3354             :     /* Open relations for processing, and grab exclusive access on each */
    3355         734 :     foreach(cell, relids)
    3356             :     {
    3357         400 :         Oid         rid = lfirst_oid(cell);
    3358             :         Relation    rel;
    3359             : 
    3360         400 :         rel = table_open(rid, AccessExclusiveLock);
    3361         400 :         relations = lappend(relations, rel);
    3362             :     }
    3363             : 
    3364             :     /* Don't allow truncate on tables that are referenced by foreign keys */
    3365         334 :     heap_truncate_check_FKs(relations, true);
    3366             : 
    3367             :     /* OK to do it */
    3368         716 :     foreach(cell, relations)
    3369             :     {
    3370         388 :         Relation    rel = lfirst(cell);
    3371             : 
    3372             :         /* Truncate the relation */
    3373         388 :         heap_truncate_one_rel(rel);
    3374             : 
    3375             :         /* Close the relation, but keep exclusive lock on it until commit */
    3376         388 :         table_close(rel, NoLock);
    3377             :     }
    3378         328 : }
    3379             : 
    3380             : /*
    3381             :  *   heap_truncate_one_rel
    3382             :  *
    3383             :  *   This routine deletes all data within the specified relation.
    3384             :  *
    3385             :  * This is not transaction-safe, because the truncation is done immediately
    3386             :  * and cannot be rolled back later.  Caller is responsible for having
    3387             :  * checked permissions etc, and must have obtained AccessExclusiveLock.
    3388             :  */
    3389             : void
    3390         478 : heap_truncate_one_rel(Relation rel)
    3391             : {
    3392             :     Oid         toastrelid;
    3393             : 
    3394             :     /*
    3395             :      * Truncate the relation.  Partitioned tables have no storage, so there is
    3396             :      * nothing to do for them here.
    3397             :      */
    3398         478 :     if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
    3399          24 :         return;
    3400             : 
    3401             :     /* Truncate the underlying relation */
    3402         454 :     table_relation_nontransactional_truncate(rel);
    3403             : 
    3404             :     /* If the relation has indexes, truncate the indexes too */
    3405         454 :     RelationTruncateIndexes(rel);
    3406             : 
    3407             :     /* If there is a toast table, truncate that too */
    3408         454 :     toastrelid = rel->rd_rel->reltoastrelid;
    3409         454 :     if (OidIsValid(toastrelid))
    3410             :     {
    3411         122 :         Relation    toastrel = table_open(toastrelid, AccessExclusiveLock);
    3412             : 
    3413         122 :         table_relation_nontransactional_truncate(toastrel);
    3414         122 :         RelationTruncateIndexes(toastrel);
    3415             :         /* keep the lock... */
    3416         122 :         table_close(toastrel, NoLock);
    3417             :     }
    3418             : }
    3419             : 
    3420             : /*
    3421             :  * heap_truncate_check_FKs
    3422             :  *      Check for foreign keys referencing a list of relations that
    3423             :  *      are to be truncated, and raise error if there are any
    3424             :  *
    3425             :  * We disallow such FKs (except self-referential ones) since the whole point
    3426             :  * of TRUNCATE is to not scan the individual rows to be thrown away.
    3427             :  *
    3428             :  * This is split out so it can be shared by both implementations of truncate.
    3429             :  * Caller should already hold a suitable lock on the relations.
    3430             :  *
    3431             :  * tempTables is only used to select an appropriate error message.
    3432             :  */
    3433             : void
    3434        1728 : heap_truncate_check_FKs(List *relations, bool tempTables)
    3435             : {
    3436        1728 :     List       *oids = NIL;
    3437             :     List       *dependents;
    3438             :     ListCell   *cell;
    3439             : 
    3440             :     /*
    3441             :      * Build a list of OIDs of the interesting relations.
    3442             :      *
    3443             :      * If a relation has no triggers, then it can neither have FKs nor be
    3444             :      * referenced by a FK from another table, so we can ignore it.  For
    3445             :      * partitioned tables, FKs have no triggers, so we must include them
    3446             :      * anyway.
    3447             :      */
    3448        5546 :     foreach(cell, relations)
    3449             :     {
    3450        3818 :         Relation    rel = lfirst(cell);
    3451             : 
    3452        3818 :         if (rel->rd_rel->relhastriggers ||
    3453        2574 :             rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
    3454        1728 :             oids = lappend_oid(oids, RelationGetRelid(rel));
    3455             :     }
    3456             : 
    3457             :     /*
    3458             :      * Fast path: if no relation has triggers, none has FKs either.
    3459             :      */
    3460        1728 :     if (oids == NIL)
    3461        1028 :         return;
    3462             : 
    3463             :     /*
    3464             :      * Otherwise, must scan pg_constraint.  We make one pass with all the
    3465             :      * relations considered; if this finds nothing, then all is well.
    3466             :      */
    3467         700 :     dependents = heap_truncate_find_FKs(oids);
    3468         700 :     if (dependents == NIL)
    3469         620 :         return;
    3470             : 
    3471             :     /*
    3472             :      * Otherwise we repeat the scan once per relation to identify a particular
    3473             :      * pair of relations to complain about.  This is pretty slow, but
    3474             :      * performance shouldn't matter much in a failure path.  The reason for
    3475             :      * doing things this way is to ensure that the message produced is not
    3476             :      * dependent on chance row locations within pg_constraint.
    3477             :      */
    3478         104 :     foreach(cell, oids)
    3479             :     {
    3480         104 :         Oid         relid = lfirst_oid(cell);
    3481             :         ListCell   *cell2;
    3482             : 
    3483         104 :         dependents = heap_truncate_find_FKs(list_make1_oid(relid));
    3484             : 
    3485         164 :         foreach(cell2, dependents)
    3486             :         {
    3487         140 :             Oid         relid2 = lfirst_oid(cell2);
    3488             : 
    3489         140 :             if (!list_member_oid(oids, relid2))
    3490             :             {
    3491          80 :                 char       *relname = get_rel_name(relid);
    3492          80 :                 char       *relname2 = get_rel_name(relid2);
    3493             : 
    3494          80 :                 if (tempTables)
    3495           6 :                     ereport(ERROR,
    3496             :                             (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    3497             :                              errmsg("unsupported ON COMMIT and foreign key combination"),
    3498             :                              errdetail("Table \"%s\" references \"%s\", but they do not have the same ON COMMIT setting.",
    3499             :                                        relname2, relname)));
    3500             :                 else
    3501          74 :                     ereport(ERROR,
    3502             :                             (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    3503             :                              errmsg("cannot truncate a table referenced in a foreign key constraint"),
    3504             :                              errdetail("Table \"%s\" references \"%s\".",
    3505             :                                        relname2, relname),
    3506             :                              errhint("Truncate table \"%s\" at the same time, "
    3507             :                                      "or use TRUNCATE ... CASCADE.",
    3508             :                                      relname2)));
    3509             :             }
    3510             :         }
    3511             :     }
    3512             : }
    3513             : 
    3514             : /*
    3515             :  * heap_truncate_find_FKs
    3516             :  *      Find relations having foreign keys referencing any of the given rels
    3517             :  *
    3518             :  * Input and result are both lists of relation OIDs.  The result contains
    3519             :  * no duplicates, does *not* include any rels that were already in the input
    3520             :  * list, and is sorted in OID order.  (The last property is enforced mainly
    3521             :  * to guarantee consistent behavior in the regression tests; we don't want
    3522             :  * behavior to change depending on chance locations of rows in pg_constraint.)
    3523             :  *
    3524             :  * Note: caller should already have appropriate lock on all rels mentioned
    3525             :  * in relationIds.  Since adding or dropping an FK requires exclusive lock
    3526             :  * on both rels, this ensures that the answer will be stable.
    3527             :  */
    3528             : List *
    3529         884 : heap_truncate_find_FKs(List *relationIds)
    3530             : {
    3531         884 :     List       *result = NIL;
    3532             :     List       *oids;
    3533             :     List       *parent_cons;
    3534             :     ListCell   *cell;
    3535             :     ScanKeyData key;
    3536             :     Relation    fkeyRel;
    3537             :     SysScanDesc fkeyScan;
    3538             :     HeapTuple   tuple;
    3539             :     bool        restart;
    3540             : 
    3541         884 :     oids = list_copy(relationIds);
    3542             : 
    3543             :     /*
    3544             :      * Must scan pg_constraint.  Right now, it is a seqscan because there is
    3545             :      * no available index on confrelid.
    3546             :      */
    3547         884 :     fkeyRel = table_open(ConstraintRelationId, AccessShareLock);
    3548             : 
    3549         908 : restart:
    3550         908 :     restart = false;
    3551         908 :     parent_cons = NIL;
    3552             : 
    3553         908 :     fkeyScan = systable_beginscan(fkeyRel, InvalidOid, false,
    3554             :                                   NULL, 0, NULL);
    3555             : 
    3556      280048 :     while (HeapTupleIsValid(tuple = systable_getnext(fkeyScan)))
    3557             :     {
    3558      279140 :         Form_pg_constraint con = (Form_pg_constraint) GETSTRUCT(tuple);
    3559             : 
    3560             :         /* Not a foreign key */
    3561      279140 :         if (con->contype != CONSTRAINT_FOREIGN)
    3562      243616 :             continue;
    3563             : 
    3564             :         /* Not referencing one of our list of tables */
    3565       35524 :         if (!list_member_oid(oids, con->confrelid))
    3566       34518 :             continue;
    3567             : 
    3568             :         /*
    3569             :          * If this constraint has a parent constraint which we have not seen
    3570             :          * yet, keep track of it for the second loop, below.  Tracking parent
    3571             :          * constraints allows us to climb up to the top-level constraint and
    3572             :          * look for all possible relations referencing the partitioned table.
    3573             :          */
    3574        1006 :         if (OidIsValid(con->conparentid) &&
    3575         288 :             !list_member_oid(parent_cons, con->conparentid))
    3576         144 :             parent_cons = lappend_oid(parent_cons, con->conparentid);
    3577             : 
    3578             :         /*
    3579             :          * Add referencer to result, unless present in input list.  (Don't
    3580             :          * worry about dupes: we'll fix that below).
    3581             :          */
    3582        1006 :         if (!list_member_oid(relationIds, con->conrelid))
    3583         500 :             result = lappend_oid(result, con->conrelid);
    3584             :     }
    3585             : 
    3586         908 :     systable_endscan(fkeyScan);
    3587             : 
    3588             :     /*
    3589             :      * Process each parent constraint we found to add the list of referenced
    3590             :      * relations by them to the oids list.  If we do add any new such
    3591             :      * relations, redo the first loop above.  Also, if we see that the parent
    3592             :      * constraint in turn has a parent, add that so that we process all
    3593             :      * relations in a single additional pass.
    3594             :      */
    3595        1064 :     foreach(cell, parent_cons)
    3596             :     {
    3597         156 :         Oid         parent = lfirst_oid(cell);
    3598             : 
    3599         156 :         ScanKeyInit(&key,
    3600             :                     Anum_pg_constraint_oid,
    3601             :                     BTEqualStrategyNumber, F_OIDEQ,
    3602             :                     ObjectIdGetDatum(parent));
    3603             : 
    3604         156 :         fkeyScan = systable_beginscan(fkeyRel, ConstraintOidIndexId,
    3605             :                                       true, NULL, 1, &key);
    3606             : 
    3607         156 :         tuple = systable_getnext(fkeyScan);
    3608         156 :         if (HeapTupleIsValid(tuple))
    3609             :         {
    3610         156 :             Form_pg_constraint con = (Form_pg_constraint) GETSTRUCT(tuple);
    3611             : 
    3612             :             /*
    3613             :              * pg_constraint rows always appear for partitioned hierarchies
    3614             :              * this way: on the each side of the constraint, one row appears
    3615             :              * for each partition that points to the top-most table on the
    3616             :              * other side.
    3617             :              *
    3618             :              * Because of this arrangement, we can correctly catch all
    3619             :              * relevant relations by adding to 'parent_cons' all rows with
    3620             :              * valid conparentid, and to the 'oids' list all rows with a zero
    3621             :              * conparentid.  If any oids are added to 'oids', redo the first
    3622             :              * loop above by setting 'restart'.
    3623             :              */
    3624         156 :             if (OidIsValid(con->conparentid))
    3625          54 :                 parent_cons = list_append_unique_oid(parent_cons,
    3626             :                                                      con->conparentid);
    3627         102 :             else if (!list_member_oid(oids, con->confrelid))
    3628             :             {
    3629          24 :                 oids = lappend_oid(oids, con->confrelid);
    3630          24 :                 restart = true;
    3631             :             }
    3632             :         }
    3633             : 
    3634         156 :         systable_endscan(fkeyScan);
    3635             :     }
    3636             : 
    3637         908 :     list_free(parent_cons);
    3638         908 :     if (restart)
    3639          24 :         goto restart;
    3640             : 
    3641         884 :     table_close(fkeyRel, AccessShareLock);
    3642         884 :     list_free(oids);
    3643             : 
    3644             :     /* Now sort and de-duplicate the result list */
    3645         884 :     list_sort(result, list_oid_cmp);
    3646         884 :     list_deduplicate_oid(result);
    3647             : 
    3648         884 :     return result;
    3649             : }
    3650             : 
    3651             : /*
    3652             :  * StorePartitionKey
    3653             :  *      Store information about the partition key rel into the catalog
    3654             :  */
    3655             : void
    3656        4480 : StorePartitionKey(Relation rel,
    3657             :                   char strategy,
    3658             :                   int16 partnatts,
    3659             :                   AttrNumber *partattrs,
    3660             :                   List *partexprs,
    3661             :                   Oid *partopclass,
    3662             :                   Oid *partcollation)
    3663             : {
    3664             :     int         i;
    3665             :     int2vector *partattrs_vec;
    3666             :     oidvector  *partopclass_vec;
    3667             :     oidvector  *partcollation_vec;
    3668             :     Datum       partexprDatum;
    3669             :     Relation    pg_partitioned_table;
    3670             :     HeapTuple   tuple;
    3671             :     Datum       values[Natts_pg_partitioned_table];
    3672        4480 :     bool        nulls[Natts_pg_partitioned_table] = {0};
    3673             :     ObjectAddress myself;
    3674             :     ObjectAddress referenced;
    3675             :     ObjectAddresses *addrs;
    3676             : 
    3677             :     Assert(rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE);
    3678             : 
    3679             :     /* Copy the partition attribute numbers, opclass OIDs into arrays */
    3680        4480 :     partattrs_vec = buildint2vector(partattrs, partnatts);
    3681        4480 :     partopclass_vec = buildoidvector(partopclass, partnatts);
    3682        4480 :     partcollation_vec = buildoidvector(partcollation, partnatts);
    3683             : 
    3684             :     /* Convert the expressions (if any) to a text datum */
    3685        4480 :     if (partexprs)
    3686             :     {
    3687             :         char       *exprString;
    3688             : 
    3689         214 :         exprString = nodeToString(partexprs);
    3690         214 :         partexprDatum = CStringGetTextDatum(exprString);
    3691         214 :         pfree(exprString);
    3692             :     }
    3693             :     else
    3694        4266 :         partexprDatum = (Datum) 0;
    3695             : 
    3696        4480 :     pg_partitioned_table = table_open(PartitionedRelationId, RowExclusiveLock);
    3697             : 
    3698             :     /* Only this can ever be NULL */
    3699        4480 :     if (!partexprDatum)
    3700        4266 :         nulls[Anum_pg_partitioned_table_partexprs - 1] = true;
    3701             : 
    3702        4480 :     values[Anum_pg_partitioned_table_partrelid - 1] = ObjectIdGetDatum(RelationGetRelid(rel));
    3703        4480 :     values[Anum_pg_partitioned_table_partstrat - 1] = CharGetDatum(strategy);
    3704        4480 :     values[Anum_pg_partitioned_table_partnatts - 1] = Int16GetDatum(partnatts);
    3705        4480 :     values[Anum_pg_partitioned_table_partdefid - 1] = ObjectIdGetDatum(InvalidOid);
    3706        4480 :     values[Anum_pg_partitioned_table_partattrs - 1] = PointerGetDatum(partattrs_vec);
    3707        4480 :     values[Anum_pg_partitioned_table_partclass - 1] = PointerGetDatum(partopclass_vec);
    3708        4480 :     values[Anum_pg_partitioned_table_partcollation - 1] = PointerGetDatum(partcollation_vec);
    3709        4480 :     values[Anum_pg_partitioned_table_partexprs - 1] = partexprDatum;
    3710             : 
    3711        4480 :     tuple = heap_form_tuple(RelationGetDescr(pg_partitioned_table), values, nulls);
    3712             : 
    3713        4480 :     CatalogTupleInsert(pg_partitioned_table, tuple);
    3714        4480 :     table_close(pg_partitioned_table, RowExclusiveLock);
    3715             : 
    3716             :     /* Mark this relation as dependent on a few things as follows */
    3717        4480 :     addrs = new_object_addresses();
    3718        4480 :     ObjectAddressSet(myself, RelationRelationId, RelationGetRelid(rel));
    3719             : 
    3720             :     /* Operator class and collation per key column */
    3721        9380 :     for (i = 0; i < partnatts; i++)
    3722             :     {
    3723        4900 :         ObjectAddressSet(referenced, OperatorClassRelationId, partopclass[i]);
    3724        4900 :         add_exact_object_address(&referenced, addrs);
    3725             : 
    3726             :         /* The default collation is pinned, so don't bother recording it */
    3727        4900 :         if (OidIsValid(partcollation[i]) &&
    3728         572 :             partcollation[i] != DEFAULT_COLLATION_OID)
    3729             :         {
    3730          96 :             ObjectAddressSet(referenced, CollationRelationId, partcollation[i]);
    3731          96 :             add_exact_object_address(&referenced, addrs);
    3732             :         }
    3733             :     }
    3734             : 
    3735        4480 :     record_object_address_dependencies(&myself, addrs, DEPENDENCY_NORMAL);
    3736        4480 :     free_object_addresses(addrs);
    3737             : 
    3738             :     /*
    3739             :      * The partitioning columns are made internally dependent on the table,
    3740             :      * because we cannot drop any of them without dropping the whole table.
    3741             :      * (ATExecDropColumn independently enforces that, but it's not bulletproof
    3742             :      * so we need the dependencies too.)
    3743             :      */
    3744        9380 :     for (i = 0; i < partnatts; i++)
    3745             :     {
    3746        4900 :         if (partattrs[i] == 0)
    3747         232 :             continue;           /* ignore expressions here */
    3748             : 
    3749        4668 :         ObjectAddressSubSet(referenced, RelationRelationId,
    3750             :                             RelationGetRelid(rel), partattrs[i]);
    3751        4668 :         recordDependencyOn(&referenced, &myself, DEPENDENCY_INTERNAL);
    3752             :     }
    3753             : 
    3754             :     /*
    3755             :      * Also consider anything mentioned in partition expressions.  External
    3756             :      * references (e.g. functions) get NORMAL dependencies.  Table columns
    3757             :      * mentioned in the expressions are handled the same as plain partitioning
    3758             :      * columns, i.e. they become internally dependent on the whole table.
    3759             :      */
    3760        4480 :     if (partexprs)
    3761         214 :         recordDependencyOnSingleRelExpr(&myself,
    3762             :                                         (Node *) partexprs,
    3763             :                                         RelationGetRelid(rel),
    3764             :                                         DEPENDENCY_NORMAL,
    3765             :                                         DEPENDENCY_INTERNAL,
    3766             :                                         true /* reverse the self-deps */ );
    3767             : 
    3768             :     /*
    3769             :      * We must invalidate the relcache so that the next
    3770             :      * CommandCounterIncrement() will cause the same to be rebuilt using the
    3771             :      * information in just created catalog entry.
    3772             :      */
    3773        4480 :     CacheInvalidateRelcache(rel);
    3774        4480 : }
    3775             : 
    3776             : /*
    3777             :  *  RemovePartitionKeyByRelId
    3778             :  *      Remove pg_partitioned_table entry for a relation
    3779             :  */
    3780             : void
    3781        3584 : RemovePartitionKeyByRelId(Oid relid)
    3782             : {
    3783             :     Relation    rel;
    3784             :     HeapTuple   tuple;
    3785             : 
    3786        3584 :     rel = table_open(PartitionedRelationId, RowExclusiveLock);
    3787             : 
    3788        3584 :     tuple = SearchSysCache1(PARTRELID, ObjectIdGetDatum(relid));
    3789        3584 :     if (!HeapTupleIsValid(tuple))
    3790           0 :         elog(ERROR, "cache lookup failed for partition key of relation %u",
    3791             :              relid);
    3792             : 
    3793        3584 :     CatalogTupleDelete(rel, &tuple->t_self);
    3794             : 
    3795        3584 :     ReleaseSysCache(tuple);
    3796        3584 :     table_close(rel, RowExclusiveLock);
    3797        3584 : }
    3798             : 
    3799             : /*
    3800             :  * StorePartitionBound
    3801             :  *      Update pg_class tuple of rel to store the partition bound and set
    3802             :  *      relispartition to true
    3803             :  *
    3804             :  * If this is the default partition, also update the default partition OID in
    3805             :  * pg_partitioned_table.
    3806             :  *
    3807             :  * Also, invalidate the parent's relcache, so that the next rebuild will load
    3808             :  * the new partition's info into its partition descriptor.  If there is a
    3809             :  * default partition, we must invalidate its relcache entry as well.
    3810             :  */
    3811             : void
    3812        9070 : StorePartitionBound(Relation rel, Relation parent, PartitionBoundSpec *bound)
    3813             : {
    3814             :     Relation    classRel;
    3815             :     HeapTuple   tuple,
    3816             :                 newtuple;
    3817             :     Datum       new_val[Natts_pg_class];
    3818             :     bool        new_null[Natts_pg_class],
    3819             :                 new_repl[Natts_pg_class];
    3820             :     Oid         defaultPartOid;
    3821             : 
    3822             :     /* Update pg_class tuple */
    3823        9070 :     classRel = table_open(RelationRelationId, RowExclusiveLock);
    3824        9070 :     tuple = SearchSysCacheCopy1(RELOID,
    3825             :                                 ObjectIdGetDatum(RelationGetRelid(rel)));
    3826        9070 :     if (!HeapTupleIsValid(tuple))
    3827           0 :         elog(ERROR, "cache lookup failed for relation %u",
    3828             :              RelationGetRelid(rel));
    3829             : 
    3830             : #ifdef USE_ASSERT_CHECKING
    3831             :     {
    3832             :         Form_pg_class classForm;
    3833             :         bool        isnull;
    3834             : 
    3835             :         classForm = (Form_pg_class) GETSTRUCT(tuple);
    3836             :         Assert(!classForm->relispartition);
    3837             :         (void) SysCacheGetAttr(RELOID, tuple, Anum_pg_class_relpartbound,
    3838             :                                &isnull);
    3839             :         Assert(isnull);
    3840             :     }
    3841             : #endif
    3842             : 
    3843             :     /* Fill in relpartbound value */
    3844        9070 :     memset(new_val, 0, sizeof(new_val));
    3845        9070 :     memset(new_null, false, sizeof(new_null));
    3846        9070 :     memset(new_repl, false, sizeof(new_repl));
    3847        9070 :     new_val[Anum_pg_class_relpartbound - 1] = CStringGetTextDatum(nodeToString(bound));
    3848        9070 :     new_null[Anum_pg_class_relpartbound - 1] = false;
    3849        9070 :     new_repl[Anum_pg_class_relpartbound - 1] = true;
    3850        9070 :     newtuple = heap_modify_tuple(tuple, RelationGetDescr(classRel),
    3851             :                                  new_val, new_null, new_repl);
    3852             :     /* Also set the flag */
    3853        9070 :     ((Form_pg_class) GETSTRUCT(newtuple))->relispartition = true;
    3854        9070 :     CatalogTupleUpdate(classRel, &newtuple->t_self, newtuple);
    3855        9070 :     heap_freetuple(newtuple);
    3856        9070 :     table_close(classRel, RowExclusiveLock);
    3857             : 
    3858             :     /*
    3859             :      * If we're storing bounds for the default partition, update
    3860             :      * pg_partitioned_table too.
    3861             :      */
    3862        9070 :     if (bound->is_default)
    3863         518 :         update_default_partition_oid(RelationGetRelid(parent),
    3864             :                                      RelationGetRelid(rel));
    3865             : 
    3866             :     /* Make these updates visible */
    3867        9070 :     CommandCounterIncrement();
    3868             : 
    3869             :     /*
    3870             :      * The partition constraint for the default partition depends on the
    3871             :      * partition bounds of every other partition, so we must invalidate the
    3872             :      * relcache entry for that partition every time a partition is added or
    3873             :      * removed.
    3874             :      */
    3875             :     defaultPartOid =
    3876        9070 :         get_default_oid_from_partdesc(RelationGetPartitionDesc(parent, true));
    3877        9070 :     if (OidIsValid(defaultPartOid))
    3878         644 :         CacheInvalidateRelcacheByRelid(defaultPartOid);
    3879             : 
    3880        9070 :     CacheInvalidateRelcache(parent);
    3881        9070 : }

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