Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * parse_utilcmd.c
4 : * Perform parse analysis work for various utility commands
5 : *
6 : * Formerly we did this work during parse_analyze_*() in analyze.c. However
7 : * that is fairly unsafe in the presence of querytree caching, since any
8 : * database state that we depend on in making the transformations might be
9 : * obsolete by the time the utility command is executed; and utility commands
10 : * have no infrastructure for holding locks or rechecking plan validity.
11 : * Hence these functions are now called at the start of execution of their
12 : * respective utility commands.
13 : *
14 : *
15 : * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
16 : * Portions Copyright (c) 1994, Regents of the University of California
17 : *
18 : * src/backend/parser/parse_utilcmd.c
19 : *
20 : *-------------------------------------------------------------------------
21 : */
22 :
23 : #include "postgres.h"
24 :
25 : #include "access/amapi.h"
26 : #include "access/htup_details.h"
27 : #include "access/relation.h"
28 : #include "access/reloptions.h"
29 : #include "access/table.h"
30 : #include "access/toast_compression.h"
31 : #include "catalog/dependency.h"
32 : #include "catalog/heap.h"
33 : #include "catalog/index.h"
34 : #include "catalog/namespace.h"
35 : #include "catalog/pg_am.h"
36 : #include "catalog/pg_collation.h"
37 : #include "catalog/pg_constraint.h"
38 : #include "catalog/pg_opclass.h"
39 : #include "catalog/pg_operator.h"
40 : #include "catalog/pg_statistic_ext.h"
41 : #include "catalog/pg_type.h"
42 : #include "commands/comment.h"
43 : #include "commands/defrem.h"
44 : #include "commands/sequence.h"
45 : #include "commands/tablecmds.h"
46 : #include "commands/tablespace.h"
47 : #include "miscadmin.h"
48 : #include "nodes/makefuncs.h"
49 : #include "nodes/nodeFuncs.h"
50 : #include "optimizer/optimizer.h"
51 : #include "parser/analyze.h"
52 : #include "parser/parse_clause.h"
53 : #include "parser/parse_coerce.h"
54 : #include "parser/parse_collate.h"
55 : #include "parser/parse_expr.h"
56 : #include "parser/parse_relation.h"
57 : #include "parser/parse_target.h"
58 : #include "parser/parse_type.h"
59 : #include "parser/parse_utilcmd.h"
60 : #include "parser/parser.h"
61 : #include "rewrite/rewriteManip.h"
62 : #include "utils/acl.h"
63 : #include "utils/builtins.h"
64 : #include "utils/lsyscache.h"
65 : #include "utils/partcache.h"
66 : #include "utils/rel.h"
67 : #include "utils/ruleutils.h"
68 : #include "utils/syscache.h"
69 : #include "utils/typcache.h"
70 :
71 :
72 : /* State shared by transformCreateStmt and its subroutines */
73 : typedef struct
74 : {
75 : ParseState *pstate; /* overall parser state */
76 : const char *stmtType; /* "CREATE [FOREIGN] TABLE" or "ALTER TABLE" */
77 : RangeVar *relation; /* relation to create */
78 : Relation rel; /* opened/locked rel, if ALTER */
79 : List *inhRelations; /* relations to inherit from */
80 : bool isforeign; /* true if CREATE/ALTER FOREIGN TABLE */
81 : bool isalter; /* true if altering existing table */
82 : List *columns; /* ColumnDef items */
83 : List *ckconstraints; /* CHECK constraints */
84 : List *nnconstraints; /* NOT NULL constraints */
85 : List *fkconstraints; /* FOREIGN KEY constraints */
86 : List *ixconstraints; /* index-creating constraints */
87 : List *likeclauses; /* LIKE clauses that need post-processing */
88 : List *blist; /* "before list" of things to do before
89 : * creating the table */
90 : List *alist; /* "after list" of things to do after creating
91 : * the table */
92 : IndexStmt *pkey; /* PRIMARY KEY index, if any */
93 : bool ispartitioned; /* true if table is partitioned */
94 : PartitionBoundSpec *partbound; /* transformed FOR VALUES */
95 : bool ofType; /* true if statement contains OF typename */
96 : } CreateStmtContext;
97 :
98 : /* State shared by transformCreateSchemaStmtElements and its subroutines */
99 : typedef struct
100 : {
101 : const char *schemaname; /* name of schema */
102 : List *sequences; /* CREATE SEQUENCE items */
103 : List *tables; /* CREATE TABLE items */
104 : List *views; /* CREATE VIEW items */
105 : List *indexes; /* CREATE INDEX items */
106 : List *triggers; /* CREATE TRIGGER items */
107 : List *grants; /* GRANT items */
108 : } CreateSchemaStmtContext;
109 :
110 :
111 : static void transformColumnDefinition(CreateStmtContext *cxt,
112 : ColumnDef *column);
113 : static void transformTableConstraint(CreateStmtContext *cxt,
114 : Constraint *constraint);
115 : static void transformTableLikeClause(CreateStmtContext *cxt,
116 : TableLikeClause *table_like_clause);
117 : static void transformOfType(CreateStmtContext *cxt,
118 : TypeName *ofTypename);
119 : static CreateStatsStmt *generateClonedExtStatsStmt(RangeVar *heapRel,
120 : Oid heapRelid,
121 : Oid source_statsid,
122 : const AttrMap *attmap);
123 : static List *get_collation(Oid collation, Oid actual_datatype);
124 : static List *get_opclass(Oid opclass, Oid actual_datatype);
125 : static void transformIndexConstraints(CreateStmtContext *cxt);
126 : static IndexStmt *transformIndexConstraint(Constraint *constraint,
127 : CreateStmtContext *cxt);
128 : static void transformFKConstraints(CreateStmtContext *cxt,
129 : bool skipValidation,
130 : bool isAddConstraint);
131 : static void transformCheckConstraints(CreateStmtContext *cxt,
132 : bool skipValidation);
133 : static void transformConstraintAttrs(CreateStmtContext *cxt,
134 : List *constraintList);
135 : static void transformColumnType(CreateStmtContext *cxt, ColumnDef *column);
136 : static void setSchemaName(const char *context_schema, char **stmt_schema_name);
137 : static void transformPartitionCmd(CreateStmtContext *cxt, PartitionCmd *cmd);
138 : static List *transformPartitionRangeBounds(ParseState *pstate, List *blist,
139 : Relation parent);
140 : static void validateInfiniteBounds(ParseState *pstate, List *blist);
141 : static Const *transformPartitionBoundValue(ParseState *pstate, Node *val,
142 : const char *colName, Oid colType, int32 colTypmod,
143 : Oid partCollation);
144 :
145 :
146 : /*
147 : * transformCreateStmt -
148 : * parse analysis for CREATE TABLE
149 : *
150 : * Returns a List of utility commands to be done in sequence. One of these
151 : * will be the transformed CreateStmt, but there may be additional actions
152 : * to be done before and after the actual DefineRelation() call.
153 : * In addition to normal utility commands such as AlterTableStmt and
154 : * IndexStmt, the result list may contain TableLikeClause(s), representing
155 : * the need to perform additional parse analysis after DefineRelation().
156 : *
157 : * SQL allows constraints to be scattered all over, so thumb through
158 : * the columns and collect all constraints into one place.
159 : * If there are any implied indices (e.g. UNIQUE or PRIMARY KEY)
160 : * then expand those into multiple IndexStmt blocks.
161 : * - thomas 1997-12-02
162 : */
163 : List *
164 38438 : transformCreateStmt(CreateStmt *stmt, const char *queryString)
165 : {
166 : ParseState *pstate;
167 : CreateStmtContext cxt;
168 : List *result;
169 : List *save_alist;
170 : ListCell *elements;
171 : Oid namespaceid;
172 : Oid existing_relid;
173 : ParseCallbackState pcbstate;
174 :
175 : /* Set up pstate */
176 38438 : pstate = make_parsestate(NULL);
177 38438 : pstate->p_sourcetext = queryString;
178 :
179 : /*
180 : * Look up the creation namespace. This also checks permissions on the
181 : * target namespace, locks it against concurrent drops, checks for a
182 : * preexisting relation in that namespace with the same name, and updates
183 : * stmt->relation->relpersistence if the selected namespace is temporary.
184 : */
185 38438 : setup_parser_errposition_callback(&pcbstate, pstate,
186 38438 : stmt->relation->location);
187 : namespaceid =
188 38438 : RangeVarGetAndCheckCreationNamespace(stmt->relation, NoLock,
189 : &existing_relid);
190 38426 : cancel_parser_errposition_callback(&pcbstate);
191 :
192 : /*
193 : * If the relation already exists and the user specified "IF NOT EXISTS",
194 : * bail out with a NOTICE.
195 : */
196 38426 : if (stmt->if_not_exists && OidIsValid(existing_relid))
197 : {
198 : /*
199 : * If we are in an extension script, insist that the pre-existing
200 : * object be a member of the extension, to avoid security risks.
201 : */
202 : ObjectAddress address;
203 :
204 10 : ObjectAddressSet(address, RelationRelationId, existing_relid);
205 10 : checkMembershipInCurrentExtension(&address);
206 :
207 : /* OK to skip */
208 8 : ereport(NOTICE,
209 : (errcode(ERRCODE_DUPLICATE_TABLE),
210 : errmsg("relation \"%s\" already exists, skipping",
211 : stmt->relation->relname)));
212 8 : return NIL;
213 : }
214 :
215 : /*
216 : * If the target relation name isn't schema-qualified, make it so. This
217 : * prevents some corner cases in which added-on rewritten commands might
218 : * think they should apply to other relations that have the same name and
219 : * are earlier in the search path. But a local temp table is effectively
220 : * specified to be in pg_temp, so no need for anything extra in that case.
221 : */
222 38416 : if (stmt->relation->schemaname == NULL
223 35100 : && stmt->relation->relpersistence != RELPERSISTENCE_TEMP)
224 32702 : stmt->relation->schemaname = get_namespace_name(namespaceid);
225 :
226 : /* Set up CreateStmtContext */
227 38416 : cxt.pstate = pstate;
228 38416 : if (IsA(stmt, CreateForeignTableStmt))
229 : {
230 486 : cxt.stmtType = "CREATE FOREIGN TABLE";
231 486 : cxt.isforeign = true;
232 : }
233 : else
234 : {
235 37930 : cxt.stmtType = "CREATE TABLE";
236 37930 : cxt.isforeign = false;
237 : }
238 38416 : cxt.relation = stmt->relation;
239 38416 : cxt.rel = NULL;
240 38416 : cxt.inhRelations = stmt->inhRelations;
241 38416 : cxt.isalter = false;
242 38416 : cxt.columns = NIL;
243 38416 : cxt.ckconstraints = NIL;
244 38416 : cxt.nnconstraints = NIL;
245 38416 : cxt.fkconstraints = NIL;
246 38416 : cxt.ixconstraints = NIL;
247 38416 : cxt.likeclauses = NIL;
248 38416 : cxt.blist = NIL;
249 38416 : cxt.alist = NIL;
250 38416 : cxt.pkey = NULL;
251 38416 : cxt.ispartitioned = stmt->partspec != NULL;
252 38416 : cxt.partbound = stmt->partbound;
253 38416 : cxt.ofType = (stmt->ofTypename != NULL);
254 :
255 : Assert(!stmt->ofTypename || !stmt->inhRelations); /* grammar enforces */
256 :
257 38416 : if (stmt->ofTypename)
258 122 : transformOfType(&cxt, stmt->ofTypename);
259 :
260 38398 : if (stmt->partspec)
261 : {
262 5048 : if (stmt->inhRelations && !stmt->partbound)
263 6 : ereport(ERROR,
264 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
265 : errmsg("cannot create partitioned table as inheritance child")));
266 : }
267 :
268 : /*
269 : * Run through each primary element in the table creation clause. Separate
270 : * column defs from constraints, and do preliminary analysis.
271 : */
272 107762 : foreach(elements, stmt->tableElts)
273 : {
274 69612 : Node *element = lfirst(elements);
275 :
276 69612 : switch (nodeTag(element))
277 : {
278 66006 : case T_ColumnDef:
279 66006 : transformColumnDefinition(&cxt, (ColumnDef *) element);
280 65788 : break;
281 :
282 2832 : case T_Constraint:
283 2832 : transformTableConstraint(&cxt, (Constraint *) element);
284 2820 : break;
285 :
286 774 : case T_TableLikeClause:
287 774 : transformTableLikeClause(&cxt, (TableLikeClause *) element);
288 762 : break;
289 :
290 0 : default:
291 0 : elog(ERROR, "unrecognized node type: %d",
292 : (int) nodeTag(element));
293 : break;
294 : }
295 : }
296 :
297 : /*
298 : * Transfer anything we already have in cxt.alist into save_alist, to keep
299 : * it separate from the output of transformIndexConstraints. (This may
300 : * not be necessary anymore, but we'll keep doing it to preserve the
301 : * historical order of execution of the alist commands.)
302 : */
303 38150 : save_alist = cxt.alist;
304 38150 : cxt.alist = NIL;
305 :
306 : Assert(stmt->constraints == NIL);
307 :
308 : /*
309 : * Before processing index constraints, which could include a primary key,
310 : * we must scan all not-null constraints to propagate the is_not_null flag
311 : * to each corresponding ColumnDef. This is necessary because table-level
312 : * not-null constraints have not been marked in each ColumnDef, and the PK
313 : * processing code needs to know whether one constraint has already been
314 : * declared in order not to declare a redundant one.
315 : */
316 88308 : foreach_node(Constraint, nn, cxt.nnconstraints)
317 : {
318 12008 : char *colname = strVal(linitial(nn->keys));
319 :
320 28292 : foreach_node(ColumnDef, cd, cxt.columns)
321 : {
322 : /* not our column? */
323 16260 : if (strcmp(cd->colname, colname) != 0)
324 4276 : continue;
325 : /* Already marked not-null? Nothing to do */
326 11984 : if (cd->is_not_null)
327 11496 : break;
328 : /* Bingo, we're done for this constraint */
329 488 : cd->is_not_null = true;
330 488 : break;
331 : }
332 : }
333 :
334 : /*
335 : * Postprocess constraints that give rise to index definitions.
336 : */
337 38150 : transformIndexConstraints(&cxt);
338 :
339 : /*
340 : * Re-consideration of LIKE clauses should happen after creation of
341 : * indexes, but before creation of foreign keys. This order is critical
342 : * because a LIKE clause may attempt to create a primary key. If there's
343 : * also a pkey in the main CREATE TABLE list, creation of that will not
344 : * check for a duplicate at runtime (since index_check_primary_key()
345 : * expects that we rejected dups here). Creation of the LIKE-generated
346 : * pkey behaves like ALTER TABLE ADD, so it will check, but obviously that
347 : * only works if it happens second. On the other hand, we want to make
348 : * pkeys before foreign key constraints, in case the user tries to make a
349 : * self-referential FK.
350 : */
351 38108 : cxt.alist = list_concat(cxt.alist, cxt.likeclauses);
352 :
353 : /*
354 : * Postprocess foreign-key constraints.
355 : */
356 38108 : transformFKConstraints(&cxt, true, false);
357 :
358 : /*
359 : * Postprocess check constraints.
360 : *
361 : * For regular tables all constraints can be marked valid immediately,
362 : * because the table is new therefore empty. Not so for foreign tables.
363 : */
364 38108 : transformCheckConstraints(&cxt, !cxt.isforeign);
365 :
366 : /*
367 : * Output results.
368 : */
369 38108 : stmt->tableElts = cxt.columns;
370 38108 : stmt->constraints = cxt.ckconstraints;
371 38108 : stmt->nnconstraints = cxt.nnconstraints;
372 :
373 38108 : result = lappend(cxt.blist, stmt);
374 38108 : result = list_concat(result, cxt.alist);
375 38108 : result = list_concat(result, save_alist);
376 :
377 38108 : return result;
378 : }
379 :
380 : /*
381 : * generateSerialExtraStmts
382 : * Generate CREATE SEQUENCE and ALTER SEQUENCE ... OWNED BY statements
383 : * to create the sequence for a serial or identity column.
384 : *
385 : * This includes determining the name the sequence will have. The caller
386 : * can ask to get back the name components by passing non-null pointers
387 : * for snamespace_p and sname_p.
388 : */
389 : static void
390 1322 : generateSerialExtraStmts(CreateStmtContext *cxt, ColumnDef *column,
391 : Oid seqtypid, List *seqoptions,
392 : bool for_identity, bool col_exists,
393 : char **snamespace_p, char **sname_p)
394 : {
395 : ListCell *option;
396 1322 : DefElem *nameEl = NULL;
397 1322 : DefElem *loggedEl = NULL;
398 : Oid snamespaceid;
399 : char *snamespace;
400 : char *sname;
401 : char seqpersistence;
402 : CreateSeqStmt *seqstmt;
403 : AlterSeqStmt *altseqstmt;
404 : List *attnamelist;
405 :
406 : /* Make a copy of this as we may end up modifying it in the code below */
407 1322 : seqoptions = list_copy(seqoptions);
408 :
409 : /*
410 : * Check for non-SQL-standard options (not supported within CREATE
411 : * SEQUENCE, because they'd be redundant), and remove them from the
412 : * seqoptions list if found.
413 : */
414 1698 : foreach(option, seqoptions)
415 : {
416 376 : DefElem *defel = lfirst_node(DefElem, option);
417 :
418 376 : if (strcmp(defel->defname, "sequence_name") == 0)
419 : {
420 44 : if (nameEl)
421 0 : errorConflictingDefElem(defel, cxt->pstate);
422 44 : nameEl = defel;
423 44 : seqoptions = foreach_delete_current(seqoptions, option);
424 : }
425 332 : else if (strcmp(defel->defname, "logged") == 0 ||
426 330 : strcmp(defel->defname, "unlogged") == 0)
427 : {
428 4 : if (loggedEl)
429 0 : errorConflictingDefElem(defel, cxt->pstate);
430 4 : loggedEl = defel;
431 4 : seqoptions = foreach_delete_current(seqoptions, option);
432 : }
433 : }
434 :
435 : /*
436 : * Determine namespace and name to use for the sequence.
437 : */
438 1322 : if (nameEl)
439 : {
440 : /* Use specified name */
441 44 : RangeVar *rv = makeRangeVarFromNameList(castNode(List, nameEl->arg));
442 :
443 44 : snamespace = rv->schemaname;
444 44 : if (!snamespace)
445 : {
446 : /* Given unqualified SEQUENCE NAME, select namespace */
447 0 : if (cxt->rel)
448 0 : snamespaceid = RelationGetNamespace(cxt->rel);
449 : else
450 0 : snamespaceid = RangeVarGetCreationNamespace(cxt->relation);
451 0 : snamespace = get_namespace_name(snamespaceid);
452 : }
453 44 : sname = rv->relname;
454 : }
455 : else
456 : {
457 : /*
458 : * Generate a name.
459 : *
460 : * Although we use ChooseRelationName, it's not guaranteed that the
461 : * selected sequence name won't conflict; given sufficiently long
462 : * field names, two different serial columns in the same table could
463 : * be assigned the same sequence name, and we'd not notice since we
464 : * aren't creating the sequence quite yet. In practice this seems
465 : * quite unlikely to be a problem, especially since few people would
466 : * need two serial columns in one table.
467 : */
468 1278 : if (cxt->rel)
469 202 : snamespaceid = RelationGetNamespace(cxt->rel);
470 : else
471 : {
472 1076 : snamespaceid = RangeVarGetCreationNamespace(cxt->relation);
473 1076 : RangeVarAdjustRelationPersistence(cxt->relation, snamespaceid);
474 : }
475 1278 : snamespace = get_namespace_name(snamespaceid);
476 1278 : sname = ChooseRelationName(cxt->relation->relname,
477 1278 : column->colname,
478 : "seq",
479 : snamespaceid,
480 : false);
481 : }
482 :
483 1322 : ereport(DEBUG1,
484 : (errmsg_internal("%s will create implicit sequence \"%s\" for serial column \"%s.%s\"",
485 : cxt->stmtType, sname,
486 : cxt->relation->relname, column->colname)));
487 :
488 : /*
489 : * Determine the persistence of the sequence. By default we copy the
490 : * persistence of the table, but if LOGGED or UNLOGGED was specified, use
491 : * that (as long as the table isn't TEMP).
492 : *
493 : * For CREATE TABLE, we get the persistence from cxt->relation, which
494 : * comes from the CreateStmt in progress. For ALTER TABLE, the parser
495 : * won't set cxt->relation->relpersistence, but we have cxt->rel as the
496 : * existing table, so we copy the persistence from there.
497 : */
498 1322 : seqpersistence = cxt->rel ? cxt->rel->rd_rel->relpersistence : cxt->relation->relpersistence;
499 1322 : if (loggedEl)
500 : {
501 4 : if (seqpersistence == RELPERSISTENCE_TEMP)
502 0 : ereport(ERROR,
503 : (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
504 : errmsg("cannot set logged status of a temporary sequence"),
505 : parser_errposition(cxt->pstate, loggedEl->location)));
506 4 : else if (strcmp(loggedEl->defname, "logged") == 0)
507 2 : seqpersistence = RELPERSISTENCE_PERMANENT;
508 : else
509 2 : seqpersistence = RELPERSISTENCE_UNLOGGED;
510 : }
511 :
512 : /*
513 : * Build a CREATE SEQUENCE command to create the sequence object, and add
514 : * it to the list of things to be done before this CREATE/ALTER TABLE.
515 : */
516 1322 : seqstmt = makeNode(CreateSeqStmt);
517 1322 : seqstmt->for_identity = for_identity;
518 1322 : seqstmt->sequence = makeRangeVar(snamespace, sname, -1);
519 1322 : seqstmt->sequence->relpersistence = seqpersistence;
520 1322 : seqstmt->options = seqoptions;
521 :
522 : /*
523 : * If a sequence data type was specified, add it to the options. Prepend
524 : * to the list rather than append; in case a user supplied their own AS
525 : * clause, the "redundant options" error will point to their occurrence,
526 : * not our synthetic one.
527 : */
528 1322 : if (seqtypid)
529 1310 : seqstmt->options = lcons(makeDefElem("as",
530 1310 : (Node *) makeTypeNameFromOid(seqtypid, -1),
531 : -1),
532 : seqstmt->options);
533 :
534 : /*
535 : * If this is ALTER ADD COLUMN, make sure the sequence will be owned by
536 : * the table's owner. The current user might be someone else (perhaps a
537 : * superuser, or someone who's only a member of the owning role), but the
538 : * SEQUENCE OWNED BY mechanisms will bleat unless table and sequence have
539 : * exactly the same owning role.
540 : */
541 1322 : if (cxt->rel)
542 246 : seqstmt->ownerId = cxt->rel->rd_rel->relowner;
543 : else
544 1076 : seqstmt->ownerId = InvalidOid;
545 :
546 1322 : cxt->blist = lappend(cxt->blist, seqstmt);
547 :
548 : /*
549 : * Store the identity sequence name that we decided on. ALTER TABLE ...
550 : * ADD COLUMN ... IDENTITY needs this so that it can fill the new column
551 : * with values from the sequence, while the association of the sequence
552 : * with the table is not set until after the ALTER TABLE.
553 : */
554 1322 : column->identitySequence = seqstmt->sequence;
555 :
556 : /*
557 : * Build an ALTER SEQUENCE ... OWNED BY command to mark the sequence as
558 : * owned by this column, and add it to the appropriate list of things to
559 : * be done along with this CREATE/ALTER TABLE. In a CREATE or ALTER ADD
560 : * COLUMN, it must be done after the statement because we don't know the
561 : * column's attnum yet. But if we do have the attnum (in AT_AddIdentity),
562 : * we can do the marking immediately, which improves some ALTER TABLE
563 : * behaviors.
564 : */
565 1322 : altseqstmt = makeNode(AlterSeqStmt);
566 1322 : altseqstmt->sequence = makeRangeVar(snamespace, sname, -1);
567 1322 : attnamelist = list_make3(makeString(snamespace),
568 : makeString(cxt->relation->relname),
569 : makeString(column->colname));
570 1322 : altseqstmt->options = list_make1(makeDefElem("owned_by",
571 : (Node *) attnamelist, -1));
572 1322 : altseqstmt->for_identity = for_identity;
573 :
574 1322 : if (col_exists)
575 160 : cxt->blist = lappend(cxt->blist, altseqstmt);
576 : else
577 1162 : cxt->alist = lappend(cxt->alist, altseqstmt);
578 :
579 1322 : if (snamespace_p)
580 860 : *snamespace_p = snamespace;
581 1322 : if (sname_p)
582 860 : *sname_p = sname;
583 1322 : }
584 :
585 : /*
586 : * transformColumnDefinition -
587 : * transform a single ColumnDef within CREATE TABLE
588 : * Also used in ALTER TABLE ADD COLUMN
589 : */
590 : static void
591 68078 : transformColumnDefinition(CreateStmtContext *cxt, ColumnDef *column)
592 : {
593 : bool is_serial;
594 : bool saw_nullable;
595 : bool saw_default;
596 : bool saw_identity;
597 : bool saw_generated;
598 68078 : bool need_notnull = false;
599 68078 : bool disallow_noinherit_notnull = false;
600 68078 : Constraint *notnull_constraint = NULL;
601 :
602 68078 : cxt->columns = lappend(cxt->columns, column);
603 :
604 : /* Check for SERIAL pseudo-types */
605 68078 : is_serial = false;
606 68078 : if (column->typeName
607 67722 : && list_length(column->typeName->names) == 1
608 28930 : && !column->typeName->pct_type)
609 : {
610 28930 : char *typname = strVal(linitial(column->typeName->names));
611 :
612 28930 : if (strcmp(typname, "smallserial") == 0 ||
613 28922 : strcmp(typname, "serial2") == 0)
614 : {
615 14 : is_serial = true;
616 14 : column->typeName->names = NIL;
617 14 : column->typeName->typeOid = INT2OID;
618 : }
619 28916 : else if (strcmp(typname, "serial") == 0 ||
620 28092 : strcmp(typname, "serial4") == 0)
621 : {
622 824 : is_serial = true;
623 824 : column->typeName->names = NIL;
624 824 : column->typeName->typeOid = INT4OID;
625 : }
626 28092 : else if (strcmp(typname, "bigserial") == 0 ||
627 28082 : strcmp(typname, "serial8") == 0)
628 : {
629 22 : is_serial = true;
630 22 : column->typeName->names = NIL;
631 22 : column->typeName->typeOid = INT8OID;
632 : }
633 :
634 : /*
635 : * We have to reject "serial[]" explicitly, because once we've set
636 : * typeid, LookupTypeName won't notice arrayBounds. We don't need any
637 : * special coding for serial(typmod) though.
638 : */
639 28930 : if (is_serial && column->typeName->arrayBounds != NIL)
640 0 : ereport(ERROR,
641 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
642 : errmsg("array of serial is not implemented"),
643 : parser_errposition(cxt->pstate,
644 : column->typeName->location)));
645 : }
646 :
647 : /* Do necessary work on the column type declaration */
648 68078 : if (column->typeName)
649 67722 : transformColumnType(cxt, column);
650 :
651 : /* Special actions for SERIAL pseudo-types */
652 68040 : if (is_serial)
653 : {
654 : char *snamespace;
655 : char *sname;
656 : char *qstring;
657 : A_Const *snamenode;
658 : TypeCast *castnode;
659 : FuncCall *funccallnode;
660 : Constraint *constraint;
661 :
662 860 : generateSerialExtraStmts(cxt, column,
663 860 : column->typeName->typeOid, NIL,
664 : false, false,
665 : &snamespace, &sname);
666 :
667 : /*
668 : * Create appropriate constraints for SERIAL. We do this in full,
669 : * rather than shortcutting, so that we will detect any conflicting
670 : * constraints the user wrote (like a different DEFAULT).
671 : *
672 : * Create an expression tree representing the function call
673 : * nextval('sequencename'). We cannot reduce the raw tree to cooked
674 : * form until after the sequence is created, but there's no need to do
675 : * so.
676 : */
677 860 : qstring = quote_qualified_identifier(snamespace, sname);
678 860 : snamenode = makeNode(A_Const);
679 860 : snamenode->val.node.type = T_String;
680 860 : snamenode->val.sval.sval = qstring;
681 860 : snamenode->location = -1;
682 860 : castnode = makeNode(TypeCast);
683 860 : castnode->typeName = SystemTypeName("regclass");
684 860 : castnode->arg = (Node *) snamenode;
685 860 : castnode->location = -1;
686 860 : funccallnode = makeFuncCall(SystemFuncName("nextval"),
687 860 : list_make1(castnode),
688 : COERCE_EXPLICIT_CALL,
689 : -1);
690 860 : constraint = makeNode(Constraint);
691 860 : constraint->contype = CONSTR_DEFAULT;
692 860 : constraint->location = -1;
693 860 : constraint->raw_expr = (Node *) funccallnode;
694 860 : constraint->cooked_expr = NULL;
695 860 : column->constraints = lappend(column->constraints, constraint);
696 :
697 : /* have a not-null constraint added later */
698 860 : need_notnull = true;
699 860 : disallow_noinherit_notnull = true;
700 : }
701 :
702 : /* Process column constraints, if any... */
703 68040 : transformConstraintAttrs(cxt, column->constraints);
704 :
705 : /*
706 : * First, scan the column's constraints to see if a not-null constraint
707 : * that we add must be prevented from being NO INHERIT. This should be
708 : * enforced only for PRIMARY KEY, not IDENTITY or SERIAL. However, if the
709 : * not-null constraint is specified as a table constraint rather than as a
710 : * column constraint, AddRelationNotNullConstraints would raise an error
711 : * if a NO INHERIT mismatch is found. To avoid inconsistently disallowing
712 : * it in the table constraint case but not the column constraint case, we
713 : * disallow it here as well. Maybe AddRelationNotNullConstraints can be
714 : * improved someday, so that it doesn't complain, and then we can remove
715 : * the restriction for SERIAL and IDENTITY here as well.
716 : */
717 68016 : if (!disallow_noinherit_notnull)
718 : {
719 151814 : foreach_node(Constraint, constraint, column->constraints)
720 : {
721 17502 : switch (constraint->contype)
722 : {
723 5650 : case CONSTR_IDENTITY:
724 : case CONSTR_PRIMARY:
725 5650 : disallow_noinherit_notnull = true;
726 5650 : break;
727 11852 : default:
728 11852 : break;
729 : }
730 : }
731 : }
732 :
733 : /* Now scan them again to do full processing */
734 68016 : saw_nullable = false;
735 68016 : saw_default = false;
736 68016 : saw_identity = false;
737 68016 : saw_generated = false;
738 :
739 154662 : foreach_node(Constraint, constraint, column->constraints)
740 : {
741 18954 : switch (constraint->contype)
742 : {
743 24 : case CONSTR_NULL:
744 24 : if ((saw_nullable && column->is_not_null) || need_notnull)
745 6 : ereport(ERROR,
746 : (errcode(ERRCODE_SYNTAX_ERROR),
747 : errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
748 : column->colname, cxt->relation->relname),
749 : parser_errposition(cxt->pstate,
750 : constraint->location)));
751 18 : column->is_not_null = false;
752 18 : saw_nullable = true;
753 18 : break;
754 :
755 6658 : case CONSTR_NOTNULL:
756 6658 : if (cxt->ispartitioned && constraint->is_no_inherit)
757 6 : ereport(ERROR,
758 : errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
759 : errmsg("not-null constraints on partitioned tables cannot be NO INHERIT"));
760 :
761 : /* Disallow conflicting [NOT] NULL markings */
762 6652 : if (saw_nullable && !column->is_not_null)
763 0 : ereport(ERROR,
764 : (errcode(ERRCODE_SYNTAX_ERROR),
765 : errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
766 : column->colname, cxt->relation->relname),
767 : parser_errposition(cxt->pstate,
768 : constraint->location)));
769 :
770 6652 : if (disallow_noinherit_notnull && constraint->is_no_inherit)
771 30 : ereport(ERROR,
772 : errcode(ERRCODE_SYNTAX_ERROR),
773 : errmsg("conflicting NO INHERIT declarations for not-null constraints on column \"%s\"",
774 : column->colname));
775 :
776 : /*
777 : * If this is the first time we see this column being marked
778 : * not-null, add the constraint entry and keep track of it.
779 : * Also, remove previous markings that we need one.
780 : *
781 : * If this is a redundant not-null specification, just check
782 : * that it doesn't conflict with what was specified earlier.
783 : *
784 : * Any conflicts with table constraints will be further
785 : * checked in AddRelationNotNullConstraints().
786 : */
787 6622 : if (!column->is_not_null)
788 : {
789 6598 : column->is_not_null = true;
790 6598 : saw_nullable = true;
791 6598 : need_notnull = false;
792 :
793 6598 : constraint->keys = list_make1(makeString(column->colname));
794 6598 : notnull_constraint = constraint;
795 6598 : cxt->nnconstraints = lappend(cxt->nnconstraints, constraint);
796 : }
797 24 : else if (notnull_constraint)
798 : {
799 24 : if (constraint->conname &&
800 18 : notnull_constraint->conname &&
801 12 : strcmp(notnull_constraint->conname, constraint->conname) != 0)
802 6 : elog(ERROR, "conflicting not-null constraint names \"%s\" and \"%s\"",
803 : notnull_constraint->conname, constraint->conname);
804 :
805 18 : if (notnull_constraint->is_no_inherit != constraint->is_no_inherit)
806 0 : ereport(ERROR,
807 : errcode(ERRCODE_SYNTAX_ERROR),
808 : errmsg("conflicting NO INHERIT declarations for not-null constraints on column \"%s\"",
809 : column->colname));
810 :
811 18 : if (!notnull_constraint->conname && constraint->conname)
812 6 : notnull_constraint->conname = constraint->conname;
813 : }
814 :
815 6616 : break;
816 :
817 2502 : case CONSTR_DEFAULT:
818 2502 : if (saw_default)
819 0 : ereport(ERROR,
820 : (errcode(ERRCODE_SYNTAX_ERROR),
821 : errmsg("multiple default values specified for column \"%s\" of table \"%s\"",
822 : column->colname, cxt->relation->relname),
823 : parser_errposition(cxt->pstate,
824 : constraint->location)));
825 2502 : column->raw_default = constraint->raw_expr;
826 : Assert(constraint->cooked_expr == NULL);
827 2502 : saw_default = true;
828 2502 : break;
829 :
830 326 : case CONSTR_IDENTITY:
831 : {
832 : Type ctype;
833 : Oid typeOid;
834 :
835 326 : if (cxt->ofType)
836 6 : ereport(ERROR,
837 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
838 : errmsg("identity columns are not supported on typed tables")));
839 320 : if (cxt->partbound)
840 24 : ereport(ERROR,
841 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
842 : errmsg("identity columns are not supported on partitions")));
843 :
844 296 : ctype = typenameType(cxt->pstate, column->typeName, NULL);
845 296 : typeOid = ((Form_pg_type) GETSTRUCT(ctype))->oid;
846 296 : ReleaseSysCache(ctype);
847 :
848 296 : if (saw_identity)
849 6 : ereport(ERROR,
850 : (errcode(ERRCODE_SYNTAX_ERROR),
851 : errmsg("multiple identity specifications for column \"%s\" of table \"%s\"",
852 : column->colname, cxt->relation->relname),
853 : parser_errposition(cxt->pstate,
854 : constraint->location)));
855 :
856 290 : generateSerialExtraStmts(cxt, column,
857 : typeOid, constraint->options,
858 : true, false,
859 : NULL, NULL);
860 :
861 290 : column->identity = constraint->generated_when;
862 290 : saw_identity = true;
863 :
864 : /*
865 : * Identity columns are always NOT NULL, but we may have a
866 : * constraint already.
867 : */
868 290 : if (!saw_nullable)
869 266 : need_notnull = true;
870 24 : else if (!column->is_not_null)
871 6 : ereport(ERROR,
872 : (errcode(ERRCODE_SYNTAX_ERROR),
873 : errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
874 : column->colname, cxt->relation->relname),
875 : parser_errposition(cxt->pstate,
876 : constraint->location)));
877 284 : break;
878 : }
879 :
880 1734 : case CONSTR_GENERATED:
881 1734 : if (cxt->ofType)
882 12 : ereport(ERROR,
883 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
884 : errmsg("generated columns are not supported on typed tables")));
885 1722 : if (saw_generated)
886 12 : ereport(ERROR,
887 : (errcode(ERRCODE_SYNTAX_ERROR),
888 : errmsg("multiple generation clauses specified for column \"%s\" of table \"%s\"",
889 : column->colname, cxt->relation->relname),
890 : parser_errposition(cxt->pstate,
891 : constraint->location)));
892 1710 : column->generated = constraint->generated_kind;
893 1710 : column->raw_default = constraint->raw_expr;
894 : Assert(constraint->cooked_expr == NULL);
895 1710 : saw_generated = true;
896 1710 : break;
897 :
898 500 : case CONSTR_CHECK:
899 500 : cxt->ckconstraints = lappend(cxt->ckconstraints, constraint);
900 500 : break;
901 :
902 5780 : case CONSTR_PRIMARY:
903 5780 : if (saw_nullable && !column->is_not_null)
904 0 : ereport(ERROR,
905 : (errcode(ERRCODE_SYNTAX_ERROR),
906 : errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
907 : column->colname, cxt->relation->relname),
908 : parser_errposition(cxt->pstate,
909 : constraint->location)));
910 5780 : need_notnull = true;
911 :
912 5780 : if (cxt->isforeign)
913 6 : ereport(ERROR,
914 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
915 : errmsg("primary key constraints are not supported on foreign tables"),
916 : parser_errposition(cxt->pstate,
917 : constraint->location)));
918 : /* FALL THRU */
919 :
920 : case CONSTR_UNIQUE:
921 6146 : if (cxt->isforeign)
922 0 : ereport(ERROR,
923 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
924 : errmsg("unique constraints are not supported on foreign tables"),
925 : parser_errposition(cxt->pstate,
926 : constraint->location)));
927 6146 : if (constraint->keys == NIL)
928 6146 : constraint->keys = list_make1(makeString(column->colname));
929 6146 : cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
930 6146 : break;
931 :
932 0 : case CONSTR_EXCLUSION:
933 : /* grammar does not allow EXCLUDE as a column constraint */
934 0 : elog(ERROR, "column exclusion constraints are not supported");
935 : break;
936 :
937 822 : case CONSTR_FOREIGN:
938 822 : if (cxt->isforeign)
939 6 : ereport(ERROR,
940 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
941 : errmsg("foreign key constraints are not supported on foreign tables"),
942 : parser_errposition(cxt->pstate,
943 : constraint->location)));
944 :
945 : /*
946 : * Fill in the current attribute's name and throw it into the
947 : * list of FK constraints to be processed later.
948 : */
949 816 : constraint->fk_attrs = list_make1(makeString(column->colname));
950 816 : cxt->fkconstraints = lappend(cxt->fkconstraints, constraint);
951 816 : break;
952 :
953 236 : case CONSTR_ATTR_DEFERRABLE:
954 : case CONSTR_ATTR_NOT_DEFERRABLE:
955 : case CONSTR_ATTR_DEFERRED:
956 : case CONSTR_ATTR_IMMEDIATE:
957 : case CONSTR_ATTR_ENFORCED:
958 : case CONSTR_ATTR_NOT_ENFORCED:
959 : /* transformConstraintAttrs took care of these */
960 236 : break;
961 :
962 0 : default:
963 0 : elog(ERROR, "unrecognized constraint type: %d",
964 : constraint->contype);
965 : break;
966 : }
967 :
968 18828 : if (saw_default && saw_identity)
969 12 : ereport(ERROR,
970 : (errcode(ERRCODE_SYNTAX_ERROR),
971 : errmsg("both default and identity specified for column \"%s\" of table \"%s\"",
972 : column->colname, cxt->relation->relname),
973 : parser_errposition(cxt->pstate,
974 : constraint->location)));
975 :
976 18816 : if (saw_default && saw_generated)
977 12 : ereport(ERROR,
978 : (errcode(ERRCODE_SYNTAX_ERROR),
979 : errmsg("both default and generation expression specified for column \"%s\" of table \"%s\"",
980 : column->colname, cxt->relation->relname),
981 : parser_errposition(cxt->pstate,
982 : constraint->location)));
983 :
984 18804 : if (saw_identity && saw_generated)
985 12 : ereport(ERROR,
986 : (errcode(ERRCODE_SYNTAX_ERROR),
987 : errmsg("both identity and generation expression specified for column \"%s\" of table \"%s\"",
988 : column->colname, cxt->relation->relname),
989 : parser_errposition(cxt->pstate,
990 : constraint->location)));
991 : }
992 :
993 : /*
994 : * If we need a not-null constraint for PRIMARY KEY, SERIAL or IDENTITY,
995 : * and one was not explicitly specified, add one now.
996 : */
997 67854 : if (need_notnull && !(saw_nullable && column->is_not_null))
998 : {
999 5180 : column->is_not_null = true;
1000 5180 : notnull_constraint = makeNotNullConstraint(makeString(column->colname));
1001 5180 : cxt->nnconstraints = lappend(cxt->nnconstraints, notnull_constraint);
1002 : }
1003 :
1004 : /*
1005 : * If needed, generate ALTER FOREIGN TABLE ALTER COLUMN statement to add
1006 : * per-column foreign data wrapper options to this column after creation.
1007 : */
1008 67854 : if (column->fdwoptions != NIL)
1009 : {
1010 : AlterTableStmt *stmt;
1011 : AlterTableCmd *cmd;
1012 :
1013 160 : cmd = makeNode(AlterTableCmd);
1014 160 : cmd->subtype = AT_AlterColumnGenericOptions;
1015 160 : cmd->name = column->colname;
1016 160 : cmd->def = (Node *) column->fdwoptions;
1017 160 : cmd->behavior = DROP_RESTRICT;
1018 160 : cmd->missing_ok = false;
1019 :
1020 160 : stmt = makeNode(AlterTableStmt);
1021 160 : stmt->relation = cxt->relation;
1022 160 : stmt->cmds = NIL;
1023 160 : stmt->objtype = OBJECT_FOREIGN_TABLE;
1024 160 : stmt->cmds = lappend(stmt->cmds, cmd);
1025 :
1026 160 : cxt->alist = lappend(cxt->alist, stmt);
1027 : }
1028 67854 : }
1029 :
1030 : /*
1031 : * transformTableConstraint
1032 : * transform a Constraint node within CREATE TABLE or ALTER TABLE
1033 : */
1034 : static void
1035 19434 : transformTableConstraint(CreateStmtContext *cxt, Constraint *constraint)
1036 : {
1037 19434 : switch (constraint->contype)
1038 : {
1039 8142 : case CONSTR_PRIMARY:
1040 8142 : if (cxt->isforeign)
1041 6 : ereport(ERROR,
1042 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1043 : errmsg("primary key constraints are not supported on foreign tables"),
1044 : parser_errposition(cxt->pstate,
1045 : constraint->location)));
1046 8136 : cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
1047 8136 : break;
1048 :
1049 5238 : case CONSTR_UNIQUE:
1050 5238 : if (cxt->isforeign)
1051 6 : ereport(ERROR,
1052 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1053 : errmsg("unique constraints are not supported on foreign tables"),
1054 : parser_errposition(cxt->pstate,
1055 : constraint->location)));
1056 5232 : cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
1057 5232 : break;
1058 :
1059 234 : case CONSTR_EXCLUSION:
1060 234 : if (cxt->isforeign)
1061 0 : ereport(ERROR,
1062 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1063 : errmsg("exclusion constraints are not supported on foreign tables"),
1064 : parser_errposition(cxt->pstate,
1065 : constraint->location)));
1066 234 : cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
1067 234 : break;
1068 :
1069 1422 : case CONSTR_CHECK:
1070 1422 : cxt->ckconstraints = lappend(cxt->ckconstraints, constraint);
1071 1422 : break;
1072 :
1073 1090 : case CONSTR_NOTNULL:
1074 1090 : if (cxt->ispartitioned && constraint->is_no_inherit)
1075 6 : ereport(ERROR,
1076 : errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1077 : errmsg("not-null constraints on partitioned tables cannot be NO INHERIT"));
1078 :
1079 1084 : cxt->nnconstraints = lappend(cxt->nnconstraints, constraint);
1080 1084 : break;
1081 :
1082 3308 : case CONSTR_FOREIGN:
1083 3308 : if (cxt->isforeign)
1084 0 : ereport(ERROR,
1085 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1086 : errmsg("foreign key constraints are not supported on foreign tables"),
1087 : parser_errposition(cxt->pstate,
1088 : constraint->location)));
1089 3308 : cxt->fkconstraints = lappend(cxt->fkconstraints, constraint);
1090 3308 : break;
1091 :
1092 0 : case CONSTR_NULL:
1093 : case CONSTR_DEFAULT:
1094 : case CONSTR_ATTR_DEFERRABLE:
1095 : case CONSTR_ATTR_NOT_DEFERRABLE:
1096 : case CONSTR_ATTR_DEFERRED:
1097 : case CONSTR_ATTR_IMMEDIATE:
1098 : case CONSTR_ATTR_ENFORCED:
1099 : case CONSTR_ATTR_NOT_ENFORCED:
1100 0 : elog(ERROR, "invalid context for constraint type %d",
1101 : constraint->contype);
1102 : break;
1103 :
1104 0 : default:
1105 0 : elog(ERROR, "unrecognized constraint type: %d",
1106 : constraint->contype);
1107 : break;
1108 : }
1109 19416 : }
1110 :
1111 : /*
1112 : * transformTableLikeClause
1113 : *
1114 : * Change the LIKE <srctable> portion of a CREATE TABLE statement into
1115 : * column definitions that recreate the user defined column portions of
1116 : * <srctable>. Also, if there are any LIKE options that we can't fully
1117 : * process at this point, add the TableLikeClause to cxt->likeclauses, which
1118 : * will cause utility.c to call expandTableLikeClause() after the new
1119 : * table has been created.
1120 : *
1121 : * Some options are ignored. For example, as foreign tables have no storage,
1122 : * these INCLUDING options have no effect: STORAGE, COMPRESSION, IDENTITY
1123 : * and INDEXES. Similarly, INCLUDING INDEXES is ignored from a view.
1124 : */
1125 : static void
1126 774 : transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_clause)
1127 : {
1128 : AttrNumber parent_attno;
1129 : Relation relation;
1130 : TupleDesc tupleDesc;
1131 : AclResult aclresult;
1132 : char *comment;
1133 : ParseCallbackState pcbstate;
1134 :
1135 774 : setup_parser_errposition_callback(&pcbstate, cxt->pstate,
1136 774 : table_like_clause->relation->location);
1137 :
1138 : /* Open the relation referenced by the LIKE clause */
1139 774 : relation = relation_openrv(table_like_clause->relation, AccessShareLock);
1140 :
1141 768 : if (relation->rd_rel->relkind != RELKIND_RELATION &&
1142 386 : relation->rd_rel->relkind != RELKIND_VIEW &&
1143 374 : relation->rd_rel->relkind != RELKIND_MATVIEW &&
1144 374 : relation->rd_rel->relkind != RELKIND_COMPOSITE_TYPE &&
1145 368 : relation->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
1146 368 : relation->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
1147 6 : ereport(ERROR,
1148 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1149 : errmsg("relation \"%s\" is invalid in LIKE clause",
1150 : RelationGetRelationName(relation)),
1151 : errdetail_relkind_not_supported(relation->rd_rel->relkind)));
1152 :
1153 762 : cancel_parser_errposition_callback(&pcbstate);
1154 :
1155 : /*
1156 : * Check for privileges
1157 : */
1158 762 : if (relation->rd_rel->relkind == RELKIND_COMPOSITE_TYPE)
1159 : {
1160 6 : aclresult = object_aclcheck(TypeRelationId, relation->rd_rel->reltype, GetUserId(),
1161 : ACL_USAGE);
1162 6 : if (aclresult != ACLCHECK_OK)
1163 0 : aclcheck_error(aclresult, OBJECT_TYPE,
1164 0 : RelationGetRelationName(relation));
1165 : }
1166 : else
1167 : {
1168 756 : aclresult = pg_class_aclcheck(RelationGetRelid(relation), GetUserId(),
1169 : ACL_SELECT);
1170 756 : if (aclresult != ACLCHECK_OK)
1171 0 : aclcheck_error(aclresult, get_relkind_objtype(relation->rd_rel->relkind),
1172 0 : RelationGetRelationName(relation));
1173 : }
1174 :
1175 762 : tupleDesc = RelationGetDescr(relation);
1176 :
1177 : /*
1178 : * Insert the copied attributes into the cxt for the new table definition.
1179 : * We must do this now so that they appear in the table in the relative
1180 : * position where the LIKE clause is, as required by SQL99.
1181 : */
1182 2444 : for (parent_attno = 1; parent_attno <= tupleDesc->natts;
1183 1682 : parent_attno++)
1184 : {
1185 1682 : Form_pg_attribute attribute = TupleDescAttr(tupleDesc,
1186 : parent_attno - 1);
1187 : ColumnDef *def;
1188 :
1189 : /*
1190 : * Ignore dropped columns in the parent.
1191 : */
1192 1682 : if (attribute->attisdropped)
1193 24 : continue;
1194 :
1195 : /*
1196 : * Create a new column definition
1197 : */
1198 1658 : def = makeColumnDef(NameStr(attribute->attname), attribute->atttypid,
1199 : attribute->atttypmod, attribute->attcollation);
1200 :
1201 : /*
1202 : * Add to column list
1203 : */
1204 1658 : cxt->columns = lappend(cxt->columns, def);
1205 :
1206 : /*
1207 : * Although we don't transfer the column's default/generation
1208 : * expression now, we need to mark it GENERATED if appropriate.
1209 : */
1210 1658 : if (attribute->atthasdef && attribute->attgenerated &&
1211 78 : (table_like_clause->options & CREATE_TABLE_LIKE_GENERATED))
1212 48 : def->generated = attribute->attgenerated;
1213 :
1214 : /*
1215 : * Copy identity if requested
1216 : */
1217 1658 : if (attribute->attidentity &&
1218 30 : (table_like_clause->options & CREATE_TABLE_LIKE_IDENTITY) &&
1219 18 : !cxt->isforeign)
1220 : {
1221 : Oid seq_relid;
1222 : List *seq_options;
1223 :
1224 : /*
1225 : * find sequence owned by old column; extract sequence parameters;
1226 : * build new create sequence command
1227 : */
1228 12 : seq_relid = getIdentitySequence(relation, attribute->attnum, false);
1229 12 : seq_options = sequence_options(seq_relid);
1230 12 : generateSerialExtraStmts(cxt, def,
1231 : InvalidOid, seq_options,
1232 : true, false,
1233 : NULL, NULL);
1234 12 : def->identity = attribute->attidentity;
1235 : }
1236 :
1237 : /* Likewise, copy storage if requested */
1238 1658 : if ((table_like_clause->options & CREATE_TABLE_LIKE_STORAGE) &&
1239 198 : !cxt->isforeign)
1240 168 : def->storage = attribute->attstorage;
1241 : else
1242 1490 : def->storage = 0;
1243 :
1244 : /* Likewise, copy compression if requested */
1245 1658 : if ((table_like_clause->options & CREATE_TABLE_LIKE_COMPRESSION) != 0 &&
1246 150 : CompressionMethodIsValid(attribute->attcompression) &&
1247 12 : !cxt->isforeign)
1248 6 : def->compression =
1249 6 : pstrdup(GetCompressionMethodName(attribute->attcompression));
1250 : else
1251 1652 : def->compression = NULL;
1252 :
1253 : /* Likewise, copy comment if requested */
1254 1862 : if ((table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS) &&
1255 204 : (comment = GetComment(attribute->attrelid,
1256 : RelationRelationId,
1257 204 : attribute->attnum)) != NULL)
1258 : {
1259 84 : CommentStmt *stmt = makeNode(CommentStmt);
1260 :
1261 84 : stmt->objtype = OBJECT_COLUMN;
1262 84 : stmt->object = (Node *) list_make3(makeString(cxt->relation->schemaname),
1263 : makeString(cxt->relation->relname),
1264 : makeString(def->colname));
1265 84 : stmt->comment = comment;
1266 :
1267 84 : cxt->alist = lappend(cxt->alist, stmt);
1268 : }
1269 : }
1270 :
1271 : /*
1272 : * Reproduce not-null constraints, if any, by copying them. We do this
1273 : * regardless of options given.
1274 : */
1275 762 : if (tupleDesc->constr && tupleDesc->constr->has_not_null)
1276 : {
1277 : List *lst;
1278 :
1279 326 : lst = RelationGetNotNullConstraints(RelationGetRelid(relation), false,
1280 : true);
1281 326 : cxt->nnconstraints = list_concat(cxt->nnconstraints, lst);
1282 :
1283 : /* Copy comments on not-null constraints */
1284 326 : if (table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS)
1285 : {
1286 222 : foreach_node(Constraint, nnconstr, lst)
1287 : {
1288 90 : if ((comment = GetComment(get_relation_constraint_oid(RelationGetRelid(relation),
1289 90 : nnconstr->conname, false),
1290 : ConstraintRelationId,
1291 : 0)) != NULL)
1292 : {
1293 30 : CommentStmt *stmt = makeNode(CommentStmt);
1294 :
1295 30 : stmt->objtype = OBJECT_TABCONSTRAINT;
1296 30 : stmt->object = (Node *) list_make3(makeString(cxt->relation->schemaname),
1297 : makeString(cxt->relation->relname),
1298 : makeString(nnconstr->conname));
1299 30 : stmt->comment = comment;
1300 30 : cxt->alist = lappend(cxt->alist, stmt);
1301 : }
1302 : }
1303 : }
1304 : }
1305 :
1306 : /*
1307 : * We cannot yet deal with defaults, CHECK constraints, indexes, or
1308 : * statistics, since we don't yet know what column numbers the copied
1309 : * columns will have in the finished table. If any of those options are
1310 : * specified, add the LIKE clause to cxt->likeclauses so that
1311 : * expandTableLikeClause will be called after we do know that.
1312 : *
1313 : * In order for this to work, we remember the relation OID so that
1314 : * expandTableLikeClause is certain to open the same table.
1315 : */
1316 762 : if (table_like_clause->options &
1317 : (CREATE_TABLE_LIKE_DEFAULTS |
1318 : CREATE_TABLE_LIKE_GENERATED |
1319 : CREATE_TABLE_LIKE_CONSTRAINTS |
1320 : CREATE_TABLE_LIKE_INDEXES |
1321 : CREATE_TABLE_LIKE_STATISTICS))
1322 : {
1323 194 : table_like_clause->relationOid = RelationGetRelid(relation);
1324 194 : cxt->likeclauses = lappend(cxt->likeclauses, table_like_clause);
1325 : }
1326 :
1327 : /*
1328 : * Close the parent rel, but keep our AccessShareLock on it until xact
1329 : * commit. That will prevent someone else from deleting or ALTERing the
1330 : * parent before we can run expandTableLikeClause.
1331 : */
1332 762 : table_close(relation, NoLock);
1333 762 : }
1334 :
1335 : /*
1336 : * expandTableLikeClause
1337 : *
1338 : * Process LIKE options that require knowing the final column numbers
1339 : * assigned to the new table's columns. This executes after we have
1340 : * run DefineRelation for the new table. It returns a list of utility
1341 : * commands that should be run to generate indexes etc.
1342 : */
1343 : List *
1344 194 : expandTableLikeClause(RangeVar *heapRel, TableLikeClause *table_like_clause)
1345 : {
1346 194 : List *result = NIL;
1347 194 : List *atsubcmds = NIL;
1348 : AttrNumber parent_attno;
1349 : Relation relation;
1350 : Relation childrel;
1351 : TupleDesc tupleDesc;
1352 : TupleConstr *constr;
1353 : AttrMap *attmap;
1354 : char *comment;
1355 :
1356 : /*
1357 : * Open the relation referenced by the LIKE clause. We should still have
1358 : * the table lock obtained by transformTableLikeClause (and this'll throw
1359 : * an assertion failure if not). Hence, no need to recheck privileges
1360 : * etc. We must open the rel by OID not name, to be sure we get the same
1361 : * table.
1362 : */
1363 194 : if (!OidIsValid(table_like_clause->relationOid))
1364 0 : elog(ERROR, "expandTableLikeClause called on untransformed LIKE clause");
1365 :
1366 194 : relation = relation_open(table_like_clause->relationOid, NoLock);
1367 :
1368 194 : tupleDesc = RelationGetDescr(relation);
1369 194 : constr = tupleDesc->constr;
1370 :
1371 : /*
1372 : * Open the newly-created child relation; we have lock on that too.
1373 : */
1374 194 : childrel = relation_openrv(heapRel, NoLock);
1375 :
1376 : /*
1377 : * Construct a map from the LIKE relation's attnos to the child rel's.
1378 : * This re-checks type match etc, although it shouldn't be possible to
1379 : * have a failure since both tables are locked.
1380 : */
1381 194 : attmap = build_attrmap_by_name(RelationGetDescr(childrel),
1382 : tupleDesc,
1383 : false);
1384 :
1385 : /*
1386 : * Process defaults, if required.
1387 : */
1388 194 : if ((table_like_clause->options &
1389 104 : (CREATE_TABLE_LIKE_DEFAULTS | CREATE_TABLE_LIKE_GENERATED)) &&
1390 : constr != NULL)
1391 : {
1392 350 : for (parent_attno = 1; parent_attno <= tupleDesc->natts;
1393 258 : parent_attno++)
1394 : {
1395 258 : Form_pg_attribute attribute = TupleDescAttr(tupleDesc,
1396 : parent_attno - 1);
1397 :
1398 : /*
1399 : * Ignore dropped columns in the parent.
1400 : */
1401 258 : if (attribute->attisdropped)
1402 12 : continue;
1403 :
1404 : /*
1405 : * Copy default, if present and it should be copied. We have
1406 : * separate options for plain default expressions and GENERATED
1407 : * defaults.
1408 : */
1409 338 : if (attribute->atthasdef &&
1410 92 : (attribute->attgenerated ?
1411 54 : (table_like_clause->options & CREATE_TABLE_LIKE_GENERATED) :
1412 38 : (table_like_clause->options & CREATE_TABLE_LIKE_DEFAULTS)))
1413 : {
1414 : Node *this_default;
1415 : AlterTableCmd *atsubcmd;
1416 : bool found_whole_row;
1417 :
1418 80 : this_default = TupleDescGetDefault(tupleDesc, parent_attno);
1419 80 : if (this_default == NULL)
1420 0 : elog(ERROR, "default expression not found for attribute %d of relation \"%s\"",
1421 : parent_attno, RelationGetRelationName(relation));
1422 :
1423 80 : atsubcmd = makeNode(AlterTableCmd);
1424 80 : atsubcmd->subtype = AT_CookedColumnDefault;
1425 80 : atsubcmd->num = attmap->attnums[parent_attno - 1];
1426 80 : atsubcmd->def = map_variable_attnos(this_default,
1427 : 1, 0,
1428 : attmap,
1429 : InvalidOid,
1430 : &found_whole_row);
1431 :
1432 : /*
1433 : * Prevent this for the same reason as for constraints below.
1434 : * Note that defaults cannot contain any vars, so it's OK that
1435 : * the error message refers to generated columns.
1436 : */
1437 80 : if (found_whole_row)
1438 0 : ereport(ERROR,
1439 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1440 : errmsg("cannot convert whole-row table reference"),
1441 : errdetail("Generation expression for column \"%s\" contains a whole-row reference to table \"%s\".",
1442 : NameStr(attribute->attname),
1443 : RelationGetRelationName(relation))));
1444 :
1445 80 : atsubcmds = lappend(atsubcmds, atsubcmd);
1446 : }
1447 : }
1448 : }
1449 :
1450 : /*
1451 : * Copy CHECK constraints if requested, being careful to adjust attribute
1452 : * numbers so they match the child.
1453 : */
1454 194 : if ((table_like_clause->options & CREATE_TABLE_LIKE_CONSTRAINTS) &&
1455 : constr != NULL)
1456 : {
1457 : int ccnum;
1458 :
1459 252 : for (ccnum = 0; ccnum < constr->num_check; ccnum++)
1460 : {
1461 150 : char *ccname = constr->check[ccnum].ccname;
1462 150 : char *ccbin = constr->check[ccnum].ccbin;
1463 150 : bool ccenforced = constr->check[ccnum].ccenforced;
1464 150 : bool ccnoinherit = constr->check[ccnum].ccnoinherit;
1465 : Node *ccbin_node;
1466 : bool found_whole_row;
1467 : Constraint *n;
1468 : AlterTableCmd *atsubcmd;
1469 :
1470 150 : ccbin_node = map_variable_attnos(stringToNode(ccbin),
1471 : 1, 0,
1472 : attmap,
1473 : InvalidOid, &found_whole_row);
1474 :
1475 : /*
1476 : * We reject whole-row variables because the whole point of LIKE
1477 : * is that the new table's rowtype might later diverge from the
1478 : * parent's. So, while translation might be possible right now,
1479 : * it wouldn't be possible to guarantee it would work in future.
1480 : */
1481 150 : if (found_whole_row)
1482 0 : ereport(ERROR,
1483 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1484 : errmsg("cannot convert whole-row table reference"),
1485 : errdetail("Constraint \"%s\" contains a whole-row reference to table \"%s\".",
1486 : ccname,
1487 : RelationGetRelationName(relation))));
1488 :
1489 150 : n = makeNode(Constraint);
1490 150 : n->contype = CONSTR_CHECK;
1491 150 : n->conname = pstrdup(ccname);
1492 150 : n->location = -1;
1493 150 : n->is_enforced = ccenforced;
1494 150 : n->initially_valid = ccenforced; /* sic */
1495 150 : n->is_no_inherit = ccnoinherit;
1496 150 : n->raw_expr = NULL;
1497 150 : n->cooked_expr = nodeToString(ccbin_node);
1498 :
1499 : /* We can skip validation, since the new table should be empty. */
1500 150 : n->skip_validation = true;
1501 :
1502 150 : atsubcmd = makeNode(AlterTableCmd);
1503 150 : atsubcmd->subtype = AT_AddConstraint;
1504 150 : atsubcmd->def = (Node *) n;
1505 150 : atsubcmds = lappend(atsubcmds, atsubcmd);
1506 :
1507 : /* Copy comment on constraint */
1508 264 : if ((table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS) &&
1509 114 : (comment = GetComment(get_relation_constraint_oid(RelationGetRelid(relation),
1510 114 : n->conname, false),
1511 : ConstraintRelationId,
1512 : 0)) != NULL)
1513 : {
1514 30 : CommentStmt *stmt = makeNode(CommentStmt);
1515 :
1516 30 : stmt->objtype = OBJECT_TABCONSTRAINT;
1517 30 : stmt->object = (Node *) list_make3(makeString(heapRel->schemaname),
1518 : makeString(heapRel->relname),
1519 : makeString(n->conname));
1520 30 : stmt->comment = comment;
1521 :
1522 30 : result = lappend(result, stmt);
1523 : }
1524 : }
1525 : }
1526 :
1527 : /*
1528 : * If we generated any ALTER TABLE actions above, wrap them into a single
1529 : * ALTER TABLE command. Stick it at the front of the result, so it runs
1530 : * before any CommentStmts we made above.
1531 : */
1532 194 : if (atsubcmds)
1533 : {
1534 134 : AlterTableStmt *atcmd = makeNode(AlterTableStmt);
1535 :
1536 134 : atcmd->relation = copyObject(heapRel);
1537 134 : atcmd->cmds = atsubcmds;
1538 134 : atcmd->objtype = OBJECT_TABLE;
1539 134 : atcmd->missing_ok = false;
1540 134 : result = lcons(atcmd, result);
1541 : }
1542 :
1543 : /*
1544 : * Process indexes if required.
1545 : */
1546 194 : if ((table_like_clause->options & CREATE_TABLE_LIKE_INDEXES) &&
1547 110 : relation->rd_rel->relhasindex &&
1548 86 : childrel->rd_rel->relkind != RELKIND_FOREIGN_TABLE)
1549 : {
1550 : List *parent_indexes;
1551 : ListCell *l;
1552 :
1553 80 : parent_indexes = RelationGetIndexList(relation);
1554 :
1555 210 : foreach(l, parent_indexes)
1556 : {
1557 130 : Oid parent_index_oid = lfirst_oid(l);
1558 : Relation parent_index;
1559 : IndexStmt *index_stmt;
1560 :
1561 130 : parent_index = index_open(parent_index_oid, AccessShareLock);
1562 :
1563 : /* Build CREATE INDEX statement to recreate the parent_index */
1564 130 : index_stmt = generateClonedIndexStmt(heapRel,
1565 : parent_index,
1566 : attmap,
1567 : NULL);
1568 :
1569 : /* Copy comment on index, if requested */
1570 130 : if (table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS)
1571 : {
1572 72 : comment = GetComment(parent_index_oid, RelationRelationId, 0);
1573 :
1574 : /*
1575 : * We make use of IndexStmt's idxcomment option, so as not to
1576 : * need to know now what name the index will have.
1577 : */
1578 72 : index_stmt->idxcomment = comment;
1579 : }
1580 :
1581 130 : result = lappend(result, index_stmt);
1582 :
1583 130 : index_close(parent_index, AccessShareLock);
1584 : }
1585 : }
1586 :
1587 : /*
1588 : * Process extended statistics if required.
1589 : */
1590 194 : if (table_like_clause->options & CREATE_TABLE_LIKE_STATISTICS)
1591 : {
1592 : List *parent_extstats;
1593 : ListCell *l;
1594 :
1595 60 : parent_extstats = RelationGetStatExtList(relation);
1596 :
1597 108 : foreach(l, parent_extstats)
1598 : {
1599 48 : Oid parent_stat_oid = lfirst_oid(l);
1600 : CreateStatsStmt *stats_stmt;
1601 :
1602 48 : stats_stmt = generateClonedExtStatsStmt(heapRel,
1603 : RelationGetRelid(childrel),
1604 : parent_stat_oid,
1605 : attmap);
1606 :
1607 : /* Copy comment on statistics object, if requested */
1608 48 : if (table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS)
1609 : {
1610 48 : comment = GetComment(parent_stat_oid, StatisticExtRelationId, 0);
1611 :
1612 : /*
1613 : * We make use of CreateStatsStmt's stxcomment option, so as
1614 : * not to need to know now what name the statistics will have.
1615 : */
1616 48 : stats_stmt->stxcomment = comment;
1617 : }
1618 :
1619 48 : result = lappend(result, stats_stmt);
1620 : }
1621 :
1622 60 : list_free(parent_extstats);
1623 : }
1624 :
1625 : /* Done with child rel */
1626 194 : table_close(childrel, NoLock);
1627 :
1628 : /*
1629 : * Close the parent rel, but keep our AccessShareLock on it until xact
1630 : * commit. That will prevent someone else from deleting or ALTERing the
1631 : * parent before the child is committed.
1632 : */
1633 194 : table_close(relation, NoLock);
1634 :
1635 194 : return result;
1636 : }
1637 :
1638 : static void
1639 122 : transformOfType(CreateStmtContext *cxt, TypeName *ofTypename)
1640 : {
1641 : HeapTuple tuple;
1642 : TupleDesc tupdesc;
1643 : int i;
1644 : Oid ofTypeId;
1645 :
1646 : Assert(ofTypename);
1647 :
1648 122 : tuple = typenameType(cxt->pstate, ofTypename, NULL);
1649 116 : check_of_type(tuple);
1650 104 : ofTypeId = ((Form_pg_type) GETSTRUCT(tuple))->oid;
1651 104 : ofTypename->typeOid = ofTypeId; /* cached for later */
1652 :
1653 104 : tupdesc = lookup_rowtype_tupdesc(ofTypeId, -1);
1654 312 : for (i = 0; i < tupdesc->natts; i++)
1655 : {
1656 208 : Form_pg_attribute attr = TupleDescAttr(tupdesc, i);
1657 : ColumnDef *n;
1658 :
1659 208 : if (attr->attisdropped)
1660 0 : continue;
1661 :
1662 208 : n = makeColumnDef(NameStr(attr->attname), attr->atttypid,
1663 : attr->atttypmod, attr->attcollation);
1664 208 : n->is_from_type = true;
1665 :
1666 208 : cxt->columns = lappend(cxt->columns, n);
1667 : }
1668 104 : ReleaseTupleDesc(tupdesc);
1669 :
1670 104 : ReleaseSysCache(tuple);
1671 104 : }
1672 :
1673 : /*
1674 : * Generate an IndexStmt node using information from an already existing index
1675 : * "source_idx".
1676 : *
1677 : * heapRel is stored into the IndexStmt's relation field, but we don't use it
1678 : * otherwise; some callers pass NULL, if they don't need it to be valid.
1679 : * (The target relation might not exist yet, so we mustn't try to access it.)
1680 : *
1681 : * Attribute numbers in expression Vars are adjusted according to attmap.
1682 : *
1683 : * If constraintOid isn't NULL, we store the OID of any constraint associated
1684 : * with the index there.
1685 : *
1686 : * Unlike transformIndexConstraint, we don't make any effort to force primary
1687 : * key columns to be not-null. The larger cloning process this is part of
1688 : * should have cloned their not-null status separately (and DefineIndex will
1689 : * complain if that fails to happen).
1690 : */
1691 : IndexStmt *
1692 2596 : generateClonedIndexStmt(RangeVar *heapRel, Relation source_idx,
1693 : const AttrMap *attmap,
1694 : Oid *constraintOid)
1695 : {
1696 2596 : Oid source_relid = RelationGetRelid(source_idx);
1697 : HeapTuple ht_idxrel;
1698 : HeapTuple ht_idx;
1699 : HeapTuple ht_am;
1700 : Form_pg_class idxrelrec;
1701 : Form_pg_index idxrec;
1702 : Form_pg_am amrec;
1703 : oidvector *indcollation;
1704 : oidvector *indclass;
1705 : IndexStmt *index;
1706 : List *indexprs;
1707 : ListCell *indexpr_item;
1708 : Oid indrelid;
1709 : int keyno;
1710 : Oid keycoltype;
1711 : Datum datum;
1712 : bool isnull;
1713 :
1714 2596 : if (constraintOid)
1715 1632 : *constraintOid = InvalidOid;
1716 :
1717 : /*
1718 : * Fetch pg_class tuple of source index. We can't use the copy in the
1719 : * relcache entry because it doesn't include optional fields.
1720 : */
1721 2596 : ht_idxrel = SearchSysCache1(RELOID, ObjectIdGetDatum(source_relid));
1722 2596 : if (!HeapTupleIsValid(ht_idxrel))
1723 0 : elog(ERROR, "cache lookup failed for relation %u", source_relid);
1724 2596 : idxrelrec = (Form_pg_class) GETSTRUCT(ht_idxrel);
1725 :
1726 : /* Fetch pg_index tuple for source index from relcache entry */
1727 2596 : ht_idx = source_idx->rd_indextuple;
1728 2596 : idxrec = (Form_pg_index) GETSTRUCT(ht_idx);
1729 2596 : indrelid = idxrec->indrelid;
1730 :
1731 : /* Fetch the pg_am tuple of the index' access method */
1732 2596 : ht_am = SearchSysCache1(AMOID, ObjectIdGetDatum(idxrelrec->relam));
1733 2596 : if (!HeapTupleIsValid(ht_am))
1734 0 : elog(ERROR, "cache lookup failed for access method %u",
1735 : idxrelrec->relam);
1736 2596 : amrec = (Form_pg_am) GETSTRUCT(ht_am);
1737 :
1738 : /* Extract indcollation from the pg_index tuple */
1739 2596 : datum = SysCacheGetAttrNotNull(INDEXRELID, ht_idx,
1740 : Anum_pg_index_indcollation);
1741 2596 : indcollation = (oidvector *) DatumGetPointer(datum);
1742 :
1743 : /* Extract indclass from the pg_index tuple */
1744 2596 : datum = SysCacheGetAttrNotNull(INDEXRELID, ht_idx, Anum_pg_index_indclass);
1745 2596 : indclass = (oidvector *) DatumGetPointer(datum);
1746 :
1747 : /* Begin building the IndexStmt */
1748 2596 : index = makeNode(IndexStmt);
1749 2596 : index->relation = heapRel;
1750 2596 : index->accessMethod = pstrdup(NameStr(amrec->amname));
1751 2596 : if (OidIsValid(idxrelrec->reltablespace))
1752 52 : index->tableSpace = get_tablespace_name(idxrelrec->reltablespace);
1753 : else
1754 2544 : index->tableSpace = NULL;
1755 2596 : index->excludeOpNames = NIL;
1756 2596 : index->idxcomment = NULL;
1757 2596 : index->indexOid = InvalidOid;
1758 2596 : index->oldNumber = InvalidRelFileNumber;
1759 2596 : index->oldCreateSubid = InvalidSubTransactionId;
1760 2596 : index->oldFirstRelfilelocatorSubid = InvalidSubTransactionId;
1761 2596 : index->unique = idxrec->indisunique;
1762 2596 : index->nulls_not_distinct = idxrec->indnullsnotdistinct;
1763 2596 : index->primary = idxrec->indisprimary;
1764 2596 : index->iswithoutoverlaps = (idxrec->indisprimary || idxrec->indisunique) && idxrec->indisexclusion;
1765 2596 : index->transformed = true; /* don't need transformIndexStmt */
1766 2596 : index->concurrent = false;
1767 2596 : index->if_not_exists = false;
1768 2596 : index->reset_default_tblspc = false;
1769 :
1770 : /*
1771 : * We don't try to preserve the name of the source index; instead, just
1772 : * let DefineIndex() choose a reasonable name. (If we tried to preserve
1773 : * the name, we'd get duplicate-relation-name failures unless the source
1774 : * table was in a different schema.)
1775 : */
1776 2596 : index->idxname = NULL;
1777 :
1778 : /*
1779 : * If the index is marked PRIMARY or has an exclusion condition, it's
1780 : * certainly from a constraint; else, if it's not marked UNIQUE, it
1781 : * certainly isn't. If it is or might be from a constraint, we have to
1782 : * fetch the pg_constraint record.
1783 : */
1784 2596 : if (index->primary || index->unique || idxrec->indisexclusion)
1785 1480 : {
1786 1480 : Oid constraintId = get_index_constraint(source_relid);
1787 :
1788 1480 : if (OidIsValid(constraintId))
1789 : {
1790 : HeapTuple ht_constr;
1791 : Form_pg_constraint conrec;
1792 :
1793 1430 : if (constraintOid)
1794 1250 : *constraintOid = constraintId;
1795 :
1796 1430 : ht_constr = SearchSysCache1(CONSTROID,
1797 : ObjectIdGetDatum(constraintId));
1798 1430 : if (!HeapTupleIsValid(ht_constr))
1799 0 : elog(ERROR, "cache lookup failed for constraint %u",
1800 : constraintId);
1801 1430 : conrec = (Form_pg_constraint) GETSTRUCT(ht_constr);
1802 :
1803 1430 : index->isconstraint = true;
1804 1430 : index->deferrable = conrec->condeferrable;
1805 1430 : index->initdeferred = conrec->condeferred;
1806 :
1807 : /* If it's an exclusion constraint, we need the operator names */
1808 1430 : if (idxrec->indisexclusion)
1809 : {
1810 : Datum *elems;
1811 : int nElems;
1812 : int i;
1813 :
1814 : Assert(conrec->contype == CONSTRAINT_EXCLUSION ||
1815 : (index->iswithoutoverlaps &&
1816 : (conrec->contype == CONSTRAINT_PRIMARY || conrec->contype == CONSTRAINT_UNIQUE)));
1817 : /* Extract operator OIDs from the pg_constraint tuple */
1818 84 : datum = SysCacheGetAttrNotNull(CONSTROID, ht_constr,
1819 : Anum_pg_constraint_conexclop);
1820 84 : deconstruct_array_builtin(DatumGetArrayTypeP(datum), OIDOID, &elems, NULL, &nElems);
1821 :
1822 250 : for (i = 0; i < nElems; i++)
1823 : {
1824 166 : Oid operid = DatumGetObjectId(elems[i]);
1825 : HeapTuple opertup;
1826 : Form_pg_operator operform;
1827 : char *oprname;
1828 : char *nspname;
1829 : List *namelist;
1830 :
1831 166 : opertup = SearchSysCache1(OPEROID,
1832 : ObjectIdGetDatum(operid));
1833 166 : if (!HeapTupleIsValid(opertup))
1834 0 : elog(ERROR, "cache lookup failed for operator %u",
1835 : operid);
1836 166 : operform = (Form_pg_operator) GETSTRUCT(opertup);
1837 166 : oprname = pstrdup(NameStr(operform->oprname));
1838 : /* For simplicity we always schema-qualify the op name */
1839 166 : nspname = get_namespace_name(operform->oprnamespace);
1840 166 : namelist = list_make2(makeString(nspname),
1841 : makeString(oprname));
1842 166 : index->excludeOpNames = lappend(index->excludeOpNames,
1843 : namelist);
1844 166 : ReleaseSysCache(opertup);
1845 : }
1846 : }
1847 :
1848 1430 : ReleaseSysCache(ht_constr);
1849 : }
1850 : else
1851 50 : index->isconstraint = false;
1852 : }
1853 : else
1854 1116 : index->isconstraint = false;
1855 :
1856 : /* Get the index expressions, if any */
1857 2596 : datum = SysCacheGetAttr(INDEXRELID, ht_idx,
1858 : Anum_pg_index_indexprs, &isnull);
1859 2596 : if (!isnull)
1860 : {
1861 : char *exprsString;
1862 :
1863 166 : exprsString = TextDatumGetCString(datum);
1864 166 : indexprs = (List *) stringToNode(exprsString);
1865 : }
1866 : else
1867 2430 : indexprs = NIL;
1868 :
1869 : /* Build the list of IndexElem */
1870 2596 : index->indexParams = NIL;
1871 2596 : index->indexIncludingParams = NIL;
1872 :
1873 2596 : indexpr_item = list_head(indexprs);
1874 5734 : for (keyno = 0; keyno < idxrec->indnkeyatts; keyno++)
1875 : {
1876 : IndexElem *iparam;
1877 3138 : AttrNumber attnum = idxrec->indkey.values[keyno];
1878 3138 : Form_pg_attribute attr = TupleDescAttr(RelationGetDescr(source_idx),
1879 : keyno);
1880 3138 : int16 opt = source_idx->rd_indoption[keyno];
1881 :
1882 3138 : iparam = makeNode(IndexElem);
1883 :
1884 3138 : if (AttributeNumberIsValid(attnum))
1885 : {
1886 : /* Simple index column */
1887 : char *attname;
1888 :
1889 2972 : attname = get_attname(indrelid, attnum, false);
1890 2972 : keycoltype = get_atttype(indrelid, attnum);
1891 :
1892 2972 : iparam->name = attname;
1893 2972 : iparam->expr = NULL;
1894 : }
1895 : else
1896 : {
1897 : /* Expressional index */
1898 : Node *indexkey;
1899 : bool found_whole_row;
1900 :
1901 166 : if (indexpr_item == NULL)
1902 0 : elog(ERROR, "too few entries in indexprs list");
1903 166 : indexkey = (Node *) lfirst(indexpr_item);
1904 166 : indexpr_item = lnext(indexprs, indexpr_item);
1905 :
1906 : /* Adjust Vars to match new table's column numbering */
1907 166 : indexkey = map_variable_attnos(indexkey,
1908 : 1, 0,
1909 : attmap,
1910 : InvalidOid, &found_whole_row);
1911 :
1912 : /* As in expandTableLikeClause, reject whole-row variables */
1913 166 : if (found_whole_row)
1914 0 : ereport(ERROR,
1915 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1916 : errmsg("cannot convert whole-row table reference"),
1917 : errdetail("Index \"%s\" contains a whole-row table reference.",
1918 : RelationGetRelationName(source_idx))));
1919 :
1920 166 : iparam->name = NULL;
1921 166 : iparam->expr = indexkey;
1922 :
1923 166 : keycoltype = exprType(indexkey);
1924 : }
1925 :
1926 : /* Copy the original index column name */
1927 3138 : iparam->indexcolname = pstrdup(NameStr(attr->attname));
1928 :
1929 : /* Add the collation name, if non-default */
1930 3138 : iparam->collation = get_collation(indcollation->values[keyno], keycoltype);
1931 :
1932 : /* Add the operator class name, if non-default */
1933 3138 : iparam->opclass = get_opclass(indclass->values[keyno], keycoltype);
1934 3138 : iparam->opclassopts =
1935 3138 : untransformRelOptions(get_attoptions(source_relid, keyno + 1));
1936 :
1937 3138 : iparam->ordering = SORTBY_DEFAULT;
1938 3138 : iparam->nulls_ordering = SORTBY_NULLS_DEFAULT;
1939 :
1940 : /* Adjust options if necessary */
1941 3138 : if (source_idx->rd_indam->amcanorder)
1942 : {
1943 : /*
1944 : * If it supports sort ordering, copy DESC and NULLS opts. Don't
1945 : * set non-default settings unnecessarily, though, so as to
1946 : * improve the chance of recognizing equivalence to constraint
1947 : * indexes.
1948 : */
1949 2944 : if (opt & INDOPTION_DESC)
1950 : {
1951 0 : iparam->ordering = SORTBY_DESC;
1952 0 : if ((opt & INDOPTION_NULLS_FIRST) == 0)
1953 0 : iparam->nulls_ordering = SORTBY_NULLS_LAST;
1954 : }
1955 : else
1956 : {
1957 2944 : if (opt & INDOPTION_NULLS_FIRST)
1958 0 : iparam->nulls_ordering = SORTBY_NULLS_FIRST;
1959 : }
1960 : }
1961 :
1962 3138 : index->indexParams = lappend(index->indexParams, iparam);
1963 : }
1964 :
1965 : /* Handle included columns separately */
1966 2614 : for (keyno = idxrec->indnkeyatts; keyno < idxrec->indnatts; keyno++)
1967 : {
1968 : IndexElem *iparam;
1969 18 : AttrNumber attnum = idxrec->indkey.values[keyno];
1970 18 : Form_pg_attribute attr = TupleDescAttr(RelationGetDescr(source_idx),
1971 : keyno);
1972 :
1973 18 : iparam = makeNode(IndexElem);
1974 :
1975 18 : if (AttributeNumberIsValid(attnum))
1976 : {
1977 : /* Simple index column */
1978 : char *attname;
1979 :
1980 18 : attname = get_attname(indrelid, attnum, false);
1981 :
1982 18 : iparam->name = attname;
1983 18 : iparam->expr = NULL;
1984 : }
1985 : else
1986 0 : ereport(ERROR,
1987 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1988 : errmsg("expressions are not supported in included columns")));
1989 :
1990 : /* Copy the original index column name */
1991 18 : iparam->indexcolname = pstrdup(NameStr(attr->attname));
1992 :
1993 18 : index->indexIncludingParams = lappend(index->indexIncludingParams, iparam);
1994 : }
1995 : /* Copy reloptions if any */
1996 2596 : datum = SysCacheGetAttr(RELOID, ht_idxrel,
1997 : Anum_pg_class_reloptions, &isnull);
1998 2596 : if (!isnull)
1999 0 : index->options = untransformRelOptions(datum);
2000 :
2001 : /* If it's a partial index, decompile and append the predicate */
2002 2596 : datum = SysCacheGetAttr(INDEXRELID, ht_idx,
2003 : Anum_pg_index_indpred, &isnull);
2004 2596 : if (!isnull)
2005 : {
2006 : char *pred_str;
2007 : Node *pred_tree;
2008 : bool found_whole_row;
2009 :
2010 : /* Convert text string to node tree */
2011 30 : pred_str = TextDatumGetCString(datum);
2012 30 : pred_tree = (Node *) stringToNode(pred_str);
2013 :
2014 : /* Adjust Vars to match new table's column numbering */
2015 30 : pred_tree = map_variable_attnos(pred_tree,
2016 : 1, 0,
2017 : attmap,
2018 : InvalidOid, &found_whole_row);
2019 :
2020 : /* As in expandTableLikeClause, reject whole-row variables */
2021 30 : if (found_whole_row)
2022 0 : ereport(ERROR,
2023 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2024 : errmsg("cannot convert whole-row table reference"),
2025 : errdetail("Index \"%s\" contains a whole-row table reference.",
2026 : RelationGetRelationName(source_idx))));
2027 :
2028 30 : index->whereClause = pred_tree;
2029 : }
2030 :
2031 : /* Clean up */
2032 2596 : ReleaseSysCache(ht_idxrel);
2033 2596 : ReleaseSysCache(ht_am);
2034 :
2035 2596 : return index;
2036 : }
2037 :
2038 : /*
2039 : * Generate a CreateStatsStmt node using information from an already existing
2040 : * extended statistic "source_statsid", for the rel identified by heapRel and
2041 : * heapRelid.
2042 : *
2043 : * Attribute numbers in expression Vars are adjusted according to attmap.
2044 : */
2045 : static CreateStatsStmt *
2046 48 : generateClonedExtStatsStmt(RangeVar *heapRel, Oid heapRelid,
2047 : Oid source_statsid, const AttrMap *attmap)
2048 : {
2049 : HeapTuple ht_stats;
2050 : Form_pg_statistic_ext statsrec;
2051 : CreateStatsStmt *stats;
2052 48 : List *stat_types = NIL;
2053 48 : List *def_names = NIL;
2054 : bool isnull;
2055 : Datum datum;
2056 : ArrayType *arr;
2057 : char *enabled;
2058 : int i;
2059 :
2060 : Assert(OidIsValid(heapRelid));
2061 : Assert(heapRel != NULL);
2062 :
2063 : /*
2064 : * Fetch pg_statistic_ext tuple of source statistics object.
2065 : */
2066 48 : ht_stats = SearchSysCache1(STATEXTOID, ObjectIdGetDatum(source_statsid));
2067 48 : if (!HeapTupleIsValid(ht_stats))
2068 0 : elog(ERROR, "cache lookup failed for statistics object %u", source_statsid);
2069 48 : statsrec = (Form_pg_statistic_ext) GETSTRUCT(ht_stats);
2070 :
2071 : /* Determine which statistics types exist */
2072 48 : datum = SysCacheGetAttrNotNull(STATEXTOID, ht_stats,
2073 : Anum_pg_statistic_ext_stxkind);
2074 48 : arr = DatumGetArrayTypeP(datum);
2075 48 : if (ARR_NDIM(arr) != 1 ||
2076 48 : ARR_HASNULL(arr) ||
2077 48 : ARR_ELEMTYPE(arr) != CHAROID)
2078 0 : elog(ERROR, "stxkind is not a 1-D char array");
2079 48 : enabled = (char *) ARR_DATA_PTR(arr);
2080 144 : for (i = 0; i < ARR_DIMS(arr)[0]; i++)
2081 : {
2082 96 : if (enabled[i] == STATS_EXT_NDISTINCT)
2083 24 : stat_types = lappend(stat_types, makeString("ndistinct"));
2084 72 : else if (enabled[i] == STATS_EXT_DEPENDENCIES)
2085 24 : stat_types = lappend(stat_types, makeString("dependencies"));
2086 48 : else if (enabled[i] == STATS_EXT_MCV)
2087 24 : stat_types = lappend(stat_types, makeString("mcv"));
2088 24 : else if (enabled[i] == STATS_EXT_EXPRESSIONS)
2089 : /* expression stats are not exposed to users */
2090 24 : continue;
2091 : else
2092 0 : elog(ERROR, "unrecognized statistics kind %c", enabled[i]);
2093 : }
2094 :
2095 : /* Determine which columns the statistics are on */
2096 96 : for (i = 0; i < statsrec->stxkeys.dim1; i++)
2097 : {
2098 48 : StatsElem *selem = makeNode(StatsElem);
2099 48 : AttrNumber attnum = statsrec->stxkeys.values[i];
2100 :
2101 48 : selem->name = get_attname(heapRelid, attnum, false);
2102 48 : selem->expr = NULL;
2103 :
2104 48 : def_names = lappend(def_names, selem);
2105 : }
2106 :
2107 : /*
2108 : * Now handle expressions, if there are any. The order (with respect to
2109 : * regular attributes) does not really matter for extended stats, so we
2110 : * simply append them after simple column references.
2111 : *
2112 : * XXX Some places during build/estimation treat expressions as if they
2113 : * are before attributes, but for the CREATE command that's entirely
2114 : * irrelevant.
2115 : */
2116 48 : datum = SysCacheGetAttr(STATEXTOID, ht_stats,
2117 : Anum_pg_statistic_ext_stxexprs, &isnull);
2118 :
2119 48 : if (!isnull)
2120 : {
2121 : ListCell *lc;
2122 24 : List *exprs = NIL;
2123 : char *exprsString;
2124 :
2125 24 : exprsString = TextDatumGetCString(datum);
2126 24 : exprs = (List *) stringToNode(exprsString);
2127 :
2128 48 : foreach(lc, exprs)
2129 : {
2130 24 : Node *expr = (Node *) lfirst(lc);
2131 24 : StatsElem *selem = makeNode(StatsElem);
2132 : bool found_whole_row;
2133 :
2134 : /* Adjust Vars to match new table's column numbering */
2135 24 : expr = map_variable_attnos(expr,
2136 : 1, 0,
2137 : attmap,
2138 : InvalidOid,
2139 : &found_whole_row);
2140 :
2141 24 : selem->name = NULL;
2142 24 : selem->expr = expr;
2143 :
2144 24 : def_names = lappend(def_names, selem);
2145 : }
2146 :
2147 24 : pfree(exprsString);
2148 : }
2149 :
2150 : /* finally, build the output node */
2151 48 : stats = makeNode(CreateStatsStmt);
2152 48 : stats->defnames = NULL;
2153 48 : stats->stat_types = stat_types;
2154 48 : stats->exprs = def_names;
2155 48 : stats->relations = list_make1(heapRel);
2156 48 : stats->stxcomment = NULL;
2157 48 : stats->transformed = true; /* don't need transformStatsStmt again */
2158 48 : stats->if_not_exists = false;
2159 :
2160 : /* Clean up */
2161 48 : ReleaseSysCache(ht_stats);
2162 :
2163 48 : return stats;
2164 : }
2165 :
2166 : /*
2167 : * get_collation - fetch qualified name of a collation
2168 : *
2169 : * If collation is InvalidOid or is the default for the given actual_datatype,
2170 : * then the return value is NIL.
2171 : */
2172 : static List *
2173 3138 : get_collation(Oid collation, Oid actual_datatype)
2174 : {
2175 : List *result;
2176 : HeapTuple ht_coll;
2177 : Form_pg_collation coll_rec;
2178 : char *nsp_name;
2179 : char *coll_name;
2180 :
2181 3138 : if (!OidIsValid(collation))
2182 2872 : return NIL; /* easy case */
2183 266 : if (collation == get_typcollation(actual_datatype))
2184 244 : return NIL; /* just let it default */
2185 :
2186 22 : ht_coll = SearchSysCache1(COLLOID, ObjectIdGetDatum(collation));
2187 22 : if (!HeapTupleIsValid(ht_coll))
2188 0 : elog(ERROR, "cache lookup failed for collation %u", collation);
2189 22 : coll_rec = (Form_pg_collation) GETSTRUCT(ht_coll);
2190 :
2191 : /* For simplicity, we always schema-qualify the name */
2192 22 : nsp_name = get_namespace_name(coll_rec->collnamespace);
2193 22 : coll_name = pstrdup(NameStr(coll_rec->collname));
2194 22 : result = list_make2(makeString(nsp_name), makeString(coll_name));
2195 :
2196 22 : ReleaseSysCache(ht_coll);
2197 22 : return result;
2198 : }
2199 :
2200 : /*
2201 : * get_opclass - fetch qualified name of an index operator class
2202 : *
2203 : * If the opclass is the default for the given actual_datatype, then
2204 : * the return value is NIL.
2205 : */
2206 : static List *
2207 3138 : get_opclass(Oid opclass, Oid actual_datatype)
2208 : {
2209 3138 : List *result = NIL;
2210 : HeapTuple ht_opc;
2211 : Form_pg_opclass opc_rec;
2212 :
2213 3138 : ht_opc = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclass));
2214 3138 : if (!HeapTupleIsValid(ht_opc))
2215 0 : elog(ERROR, "cache lookup failed for opclass %u", opclass);
2216 3138 : opc_rec = (Form_pg_opclass) GETSTRUCT(ht_opc);
2217 :
2218 3138 : if (GetDefaultOpClass(actual_datatype, opc_rec->opcmethod) != opclass)
2219 : {
2220 : /* For simplicity, we always schema-qualify the name */
2221 24 : char *nsp_name = get_namespace_name(opc_rec->opcnamespace);
2222 24 : char *opc_name = pstrdup(NameStr(opc_rec->opcname));
2223 :
2224 24 : result = list_make2(makeString(nsp_name), makeString(opc_name));
2225 : }
2226 :
2227 3138 : ReleaseSysCache(ht_opc);
2228 3138 : return result;
2229 : }
2230 :
2231 :
2232 : /*
2233 : * transformIndexConstraints
2234 : * Handle UNIQUE, PRIMARY KEY, EXCLUDE constraints, which create indexes.
2235 : * We also merge in any index definitions arising from
2236 : * LIKE ... INCLUDING INDEXES.
2237 : */
2238 : static void
2239 61704 : transformIndexConstraints(CreateStmtContext *cxt)
2240 : {
2241 : IndexStmt *index;
2242 61704 : List *indexlist = NIL;
2243 61704 : List *finalindexlist = NIL;
2244 : ListCell *lc;
2245 :
2246 : /*
2247 : * Run through the constraints that need to generate an index, and do so.
2248 : *
2249 : * For PRIMARY KEY, this queues not-null constraints for each column, if
2250 : * needed.
2251 : */
2252 81344 : foreach(lc, cxt->ixconstraints)
2253 : {
2254 19706 : Constraint *constraint = lfirst_node(Constraint, lc);
2255 :
2256 : Assert(constraint->contype == CONSTR_PRIMARY ||
2257 : constraint->contype == CONSTR_UNIQUE ||
2258 : constraint->contype == CONSTR_EXCLUSION);
2259 :
2260 19706 : index = transformIndexConstraint(constraint, cxt);
2261 :
2262 19640 : indexlist = lappend(indexlist, index);
2263 : }
2264 :
2265 : /*
2266 : * Scan the index list and remove any redundant index specifications. This
2267 : * can happen if, for instance, the user writes UNIQUE PRIMARY KEY. A
2268 : * strict reading of SQL would suggest raising an error instead, but that
2269 : * strikes me as too anal-retentive. - tgl 2001-02-14
2270 : *
2271 : * XXX in ALTER TABLE case, it'd be nice to look for duplicate
2272 : * pre-existing indexes, too.
2273 : */
2274 61638 : if (cxt->pkey != NULL)
2275 : {
2276 : /* Make sure we keep the PKEY index in preference to others... */
2277 13838 : finalindexlist = list_make1(cxt->pkey);
2278 : }
2279 :
2280 81278 : foreach(lc, indexlist)
2281 : {
2282 19640 : bool keep = true;
2283 : ListCell *k;
2284 :
2285 19640 : index = lfirst(lc);
2286 :
2287 : /* if it's pkey, it's already in finalindexlist */
2288 19640 : if (index == cxt->pkey)
2289 13838 : continue;
2290 :
2291 5996 : foreach(k, finalindexlist)
2292 : {
2293 194 : IndexStmt *priorindex = lfirst(k);
2294 :
2295 200 : if (equal(index->indexParams, priorindex->indexParams) &&
2296 12 : equal(index->indexIncludingParams, priorindex->indexIncludingParams) &&
2297 12 : equal(index->whereClause, priorindex->whereClause) &&
2298 6 : equal(index->excludeOpNames, priorindex->excludeOpNames) &&
2299 6 : strcmp(index->accessMethod, priorindex->accessMethod) == 0 &&
2300 6 : index->nulls_not_distinct == priorindex->nulls_not_distinct &&
2301 6 : index->deferrable == priorindex->deferrable &&
2302 0 : index->initdeferred == priorindex->initdeferred)
2303 : {
2304 0 : priorindex->unique |= index->unique;
2305 :
2306 : /*
2307 : * If the prior index is as yet unnamed, and this one is
2308 : * named, then transfer the name to the prior index. This
2309 : * ensures that if we have named and unnamed constraints,
2310 : * we'll use (at least one of) the names for the index.
2311 : */
2312 0 : if (priorindex->idxname == NULL)
2313 0 : priorindex->idxname = index->idxname;
2314 0 : keep = false;
2315 0 : break;
2316 : }
2317 : }
2318 :
2319 5802 : if (keep)
2320 5802 : finalindexlist = lappend(finalindexlist, index);
2321 : }
2322 :
2323 : /*
2324 : * Now append all the IndexStmts to cxt->alist.
2325 : */
2326 61638 : cxt->alist = list_concat(cxt->alist, finalindexlist);
2327 61638 : }
2328 :
2329 : /*
2330 : * transformIndexConstraint
2331 : * Transform one UNIQUE, PRIMARY KEY, or EXCLUDE constraint for
2332 : * transformIndexConstraints. An IndexStmt is returned.
2333 : *
2334 : * For a PRIMARY KEY constraint, we additionally create not-null constraints
2335 : * for columns that don't already have them.
2336 : */
2337 : static IndexStmt *
2338 19706 : transformIndexConstraint(Constraint *constraint, CreateStmtContext *cxt)
2339 : {
2340 : IndexStmt *index;
2341 : ListCell *lc;
2342 :
2343 19706 : index = makeNode(IndexStmt);
2344 :
2345 19706 : index->unique = (constraint->contype != CONSTR_EXCLUSION);
2346 19706 : index->primary = (constraint->contype == CONSTR_PRIMARY);
2347 19706 : if (index->primary)
2348 : {
2349 13868 : if (cxt->pkey != NULL)
2350 0 : ereport(ERROR,
2351 : (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
2352 : errmsg("multiple primary keys for table \"%s\" are not allowed",
2353 : cxt->relation->relname),
2354 : parser_errposition(cxt->pstate, constraint->location)));
2355 13868 : cxt->pkey = index;
2356 :
2357 : /*
2358 : * In ALTER TABLE case, a primary index might already exist, but
2359 : * DefineIndex will check for it.
2360 : */
2361 : }
2362 19706 : index->nulls_not_distinct = constraint->nulls_not_distinct;
2363 19706 : index->isconstraint = true;
2364 19706 : index->iswithoutoverlaps = constraint->without_overlaps;
2365 19706 : index->deferrable = constraint->deferrable;
2366 19706 : index->initdeferred = constraint->initdeferred;
2367 :
2368 19706 : if (constraint->conname != NULL)
2369 1472 : index->idxname = pstrdup(constraint->conname);
2370 : else
2371 18234 : index->idxname = NULL; /* DefineIndex will choose name */
2372 :
2373 19706 : index->relation = cxt->relation;
2374 19706 : index->accessMethod = constraint->access_method ? constraint->access_method : DEFAULT_INDEX_TYPE;
2375 19706 : index->options = constraint->options;
2376 19706 : index->tableSpace = constraint->indexspace;
2377 19706 : index->whereClause = constraint->where_clause;
2378 19706 : index->indexParams = NIL;
2379 19706 : index->indexIncludingParams = NIL;
2380 19706 : index->excludeOpNames = NIL;
2381 19706 : index->idxcomment = NULL;
2382 19706 : index->indexOid = InvalidOid;
2383 19706 : index->oldNumber = InvalidRelFileNumber;
2384 19706 : index->oldCreateSubid = InvalidSubTransactionId;
2385 19706 : index->oldFirstRelfilelocatorSubid = InvalidSubTransactionId;
2386 19706 : index->transformed = false;
2387 19706 : index->concurrent = false;
2388 19706 : index->if_not_exists = false;
2389 19706 : index->reset_default_tblspc = constraint->reset_default_tblspc;
2390 :
2391 : /*
2392 : * If it's ALTER TABLE ADD CONSTRAINT USING INDEX, look up the index and
2393 : * verify it's usable, then extract the implied column name list. (We
2394 : * will not actually need the column name list at runtime, but we need it
2395 : * now to check for duplicate column entries below.)
2396 : */
2397 19706 : if (constraint->indexname != NULL)
2398 : {
2399 10664 : char *index_name = constraint->indexname;
2400 10664 : Relation heap_rel = cxt->rel;
2401 : Oid index_oid;
2402 : Relation index_rel;
2403 : Form_pg_index index_form;
2404 : oidvector *indclass;
2405 : Datum indclassDatum;
2406 : int i;
2407 :
2408 : /* Grammar should not allow this with explicit column list */
2409 : Assert(constraint->keys == NIL);
2410 :
2411 : /* Grammar should only allow PRIMARY and UNIQUE constraints */
2412 : Assert(constraint->contype == CONSTR_PRIMARY ||
2413 : constraint->contype == CONSTR_UNIQUE);
2414 :
2415 : /* Must be ALTER, not CREATE, but grammar doesn't enforce that */
2416 10664 : if (!cxt->isalter)
2417 0 : ereport(ERROR,
2418 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2419 : errmsg("cannot use an existing index in CREATE TABLE"),
2420 : parser_errposition(cxt->pstate, constraint->location)));
2421 :
2422 : /* Look for the index in the same schema as the table */
2423 10664 : index_oid = get_relname_relid(index_name, RelationGetNamespace(heap_rel));
2424 :
2425 10664 : if (!OidIsValid(index_oid))
2426 0 : ereport(ERROR,
2427 : (errcode(ERRCODE_UNDEFINED_OBJECT),
2428 : errmsg("index \"%s\" does not exist", index_name),
2429 : parser_errposition(cxt->pstate, constraint->location)));
2430 :
2431 : /* Open the index (this will throw an error if it is not an index) */
2432 10664 : index_rel = index_open(index_oid, AccessShareLock);
2433 10664 : index_form = index_rel->rd_index;
2434 :
2435 : /* Check that it does not have an associated constraint already */
2436 10664 : if (OidIsValid(get_index_constraint(index_oid)))
2437 0 : ereport(ERROR,
2438 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2439 : errmsg("index \"%s\" is already associated with a constraint",
2440 : index_name),
2441 : parser_errposition(cxt->pstate, constraint->location)));
2442 :
2443 : /* Perform validity checks on the index */
2444 10664 : if (index_form->indrelid != RelationGetRelid(heap_rel))
2445 0 : ereport(ERROR,
2446 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2447 : errmsg("index \"%s\" does not belong to table \"%s\"",
2448 : index_name, RelationGetRelationName(heap_rel)),
2449 : parser_errposition(cxt->pstate, constraint->location)));
2450 :
2451 10664 : if (!index_form->indisvalid)
2452 0 : ereport(ERROR,
2453 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2454 : errmsg("index \"%s\" is not valid", index_name),
2455 : parser_errposition(cxt->pstate, constraint->location)));
2456 :
2457 : /*
2458 : * Today we forbid non-unique indexes, but we could permit GiST
2459 : * indexes whose last entry is a range type and use that to create a
2460 : * WITHOUT OVERLAPS constraint (i.e. a temporal constraint).
2461 : */
2462 10664 : if (!index_form->indisunique)
2463 12 : ereport(ERROR,
2464 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2465 : errmsg("\"%s\" is not a unique index", index_name),
2466 : errdetail("Cannot create a primary key or unique constraint using such an index."),
2467 : parser_errposition(cxt->pstate, constraint->location)));
2468 :
2469 10652 : if (RelationGetIndexExpressions(index_rel) != NIL)
2470 0 : ereport(ERROR,
2471 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2472 : errmsg("index \"%s\" contains expressions", index_name),
2473 : errdetail("Cannot create a primary key or unique constraint using such an index."),
2474 : parser_errposition(cxt->pstate, constraint->location)));
2475 :
2476 10652 : if (RelationGetIndexPredicate(index_rel) != NIL)
2477 0 : ereport(ERROR,
2478 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2479 : errmsg("\"%s\" is a partial index", index_name),
2480 : errdetail("Cannot create a primary key or unique constraint using such an index."),
2481 : parser_errposition(cxt->pstate, constraint->location)));
2482 :
2483 : /*
2484 : * It's probably unsafe to change a deferred index to non-deferred. (A
2485 : * non-constraint index couldn't be deferred anyway, so this case
2486 : * should never occur; no need to sweat, but let's check it.)
2487 : */
2488 10652 : if (!index_form->indimmediate && !constraint->deferrable)
2489 0 : ereport(ERROR,
2490 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2491 : errmsg("\"%s\" is a deferrable index", index_name),
2492 : errdetail("Cannot create a non-deferrable constraint using a deferrable index."),
2493 : parser_errposition(cxt->pstate, constraint->location)));
2494 :
2495 : /*
2496 : * Insist on it being a btree. We must have an index that exactly
2497 : * matches what you'd get from plain ADD CONSTRAINT syntax, else dump
2498 : * and reload will produce a different index (breaking pg_upgrade in
2499 : * particular).
2500 : */
2501 10652 : if (index_rel->rd_rel->relam != get_index_am_oid(DEFAULT_INDEX_TYPE, false))
2502 0 : ereport(ERROR,
2503 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2504 : errmsg("index \"%s\" is not a btree", index_name),
2505 : parser_errposition(cxt->pstate, constraint->location)));
2506 :
2507 : /* Must get indclass the hard way */
2508 10652 : indclassDatum = SysCacheGetAttrNotNull(INDEXRELID,
2509 10652 : index_rel->rd_indextuple,
2510 : Anum_pg_index_indclass);
2511 10652 : indclass = (oidvector *) DatumGetPointer(indclassDatum);
2512 :
2513 28174 : for (i = 0; i < index_form->indnatts; i++)
2514 : {
2515 17534 : int16 attnum = index_form->indkey.values[i];
2516 : const FormData_pg_attribute *attform;
2517 : char *attname;
2518 : Oid defopclass;
2519 :
2520 : /*
2521 : * We shouldn't see attnum == 0 here, since we already rejected
2522 : * expression indexes. If we do, SystemAttributeDefinition will
2523 : * throw an error.
2524 : */
2525 17534 : if (attnum > 0)
2526 : {
2527 : Assert(attnum <= heap_rel->rd_att->natts);
2528 17534 : attform = TupleDescAttr(heap_rel->rd_att, attnum - 1);
2529 : }
2530 : else
2531 0 : attform = SystemAttributeDefinition(attnum);
2532 17534 : attname = pstrdup(NameStr(attform->attname));
2533 :
2534 17534 : if (i < index_form->indnkeyatts)
2535 : {
2536 : /*
2537 : * Insist on default opclass, collation, and sort options.
2538 : * While the index would still work as a constraint with
2539 : * non-default settings, it might not provide exactly the same
2540 : * uniqueness semantics as you'd get from a normally-created
2541 : * constraint; and there's also the dump/reload problem
2542 : * mentioned above.
2543 : */
2544 : Datum attoptions =
2545 17504 : get_attoptions(RelationGetRelid(index_rel), i + 1);
2546 :
2547 17504 : defopclass = GetDefaultOpClass(attform->atttypid,
2548 17504 : index_rel->rd_rel->relam);
2549 17504 : if (indclass->values[i] != defopclass ||
2550 17504 : attform->attcollation != index_rel->rd_indcollation[i] ||
2551 17498 : attoptions != (Datum) 0 ||
2552 17498 : index_rel->rd_indoption[i] != 0)
2553 12 : ereport(ERROR,
2554 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2555 : errmsg("index \"%s\" column number %d does not have default sorting behavior", index_name, i + 1),
2556 : errdetail("Cannot create a primary key or unique constraint using such an index."),
2557 : parser_errposition(cxt->pstate, constraint->location)));
2558 :
2559 : /* If a PK, ensure the columns get not null constraints */
2560 17492 : if (constraint->contype == CONSTR_PRIMARY)
2561 7956 : cxt->nnconstraints =
2562 7956 : lappend(cxt->nnconstraints,
2563 7956 : makeNotNullConstraint(makeString(attname)));
2564 :
2565 17492 : constraint->keys = lappend(constraint->keys, makeString(attname));
2566 : }
2567 : else
2568 30 : constraint->including = lappend(constraint->including, makeString(attname));
2569 : }
2570 :
2571 : /* Close the index relation but keep the lock */
2572 10640 : relation_close(index_rel, NoLock);
2573 :
2574 10640 : index->indexOid = index_oid;
2575 : }
2576 :
2577 : /*
2578 : * If it's an EXCLUDE constraint, the grammar returns a list of pairs of
2579 : * IndexElems and operator names. We have to break that apart into
2580 : * separate lists.
2581 : */
2582 19682 : if (constraint->contype == CONSTR_EXCLUSION)
2583 : {
2584 574 : foreach(lc, constraint->exclusions)
2585 : {
2586 340 : List *pair = (List *) lfirst(lc);
2587 : IndexElem *elem;
2588 : List *opname;
2589 :
2590 : Assert(list_length(pair) == 2);
2591 340 : elem = linitial_node(IndexElem, pair);
2592 340 : opname = lsecond_node(List, pair);
2593 :
2594 340 : index->indexParams = lappend(index->indexParams, elem);
2595 340 : index->excludeOpNames = lappend(index->excludeOpNames, opname);
2596 : }
2597 : }
2598 :
2599 : /*
2600 : * For UNIQUE and PRIMARY KEY, we just have a list of column names.
2601 : *
2602 : * Make sure referenced keys exist. If we are making a PRIMARY KEY index,
2603 : * also make sure they are not-null. For WITHOUT OVERLAPS constraints, we
2604 : * make sure the last part is a range or multirange.
2605 : */
2606 : else
2607 : {
2608 47218 : foreach(lc, constraint->keys)
2609 : {
2610 27800 : char *key = strVal(lfirst(lc));
2611 27800 : bool found = false;
2612 27800 : ColumnDef *column = NULL;
2613 : ListCell *columns;
2614 : IndexElem *iparam;
2615 27800 : Oid typid = InvalidOid;
2616 :
2617 : /* Make sure referenced column exists. */
2618 29504 : foreach(columns, cxt->columns)
2619 : {
2620 10260 : column = lfirst_node(ColumnDef, columns);
2621 10260 : if (strcmp(column->colname, key) == 0)
2622 : {
2623 8556 : found = true;
2624 8556 : break;
2625 : }
2626 : }
2627 27800 : if (!found)
2628 19244 : column = NULL;
2629 :
2630 27800 : if (found)
2631 : {
2632 : /*
2633 : * column is defined in the new table. For CREATE TABLE with
2634 : * a PRIMARY KEY, we can apply the not-null constraint cheaply
2635 : * here. If the not-null constraint already exists, we can
2636 : * (albeit not so cheaply) verify that it's not a NO INHERIT
2637 : * constraint.
2638 : *
2639 : * Note that ALTER TABLE never needs either check, because
2640 : * those constraints have already been added by
2641 : * ATPrepAddPrimaryKey.
2642 : */
2643 8556 : if (constraint->contype == CONSTR_PRIMARY &&
2644 7756 : !cxt->isalter)
2645 : {
2646 7732 : if (column->is_not_null)
2647 : {
2648 12470 : foreach_node(Constraint, nn, cxt->nnconstraints)
2649 : {
2650 6328 : if (strcmp(strVal(linitial(nn->keys)), key) == 0)
2651 : {
2652 6148 : if (nn->is_no_inherit)
2653 6 : ereport(ERROR,
2654 : errcode(ERRCODE_SYNTAX_ERROR),
2655 : errmsg("conflicting NO INHERIT declaration for not-null constraint on column \"%s\"",
2656 : key));
2657 6142 : break;
2658 : }
2659 : }
2660 : }
2661 : else
2662 : {
2663 1584 : column->is_not_null = true;
2664 1584 : cxt->nnconstraints =
2665 1584 : lappend(cxt->nnconstraints,
2666 1584 : makeNotNullConstraint(makeString(key)));
2667 : }
2668 : }
2669 24 : else if (constraint->contype == CONSTR_PRIMARY)
2670 : Assert(column->is_not_null);
2671 : }
2672 19244 : else if (SystemAttributeByName(key) != NULL)
2673 : {
2674 : /*
2675 : * column will be a system column in the new table, so accept
2676 : * it. System columns can't ever be null, so no need to worry
2677 : * about PRIMARY/NOT NULL constraint.
2678 : */
2679 0 : found = true;
2680 : }
2681 19244 : else if (cxt->inhRelations)
2682 : {
2683 : /* try inherited tables */
2684 : ListCell *inher;
2685 :
2686 96 : foreach(inher, cxt->inhRelations)
2687 : {
2688 96 : RangeVar *inh = lfirst_node(RangeVar, inher);
2689 : Relation rel;
2690 : int count;
2691 :
2692 96 : rel = table_openrv(inh, AccessShareLock);
2693 : /* check user requested inheritance from valid relkind */
2694 96 : if (rel->rd_rel->relkind != RELKIND_RELATION &&
2695 0 : rel->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
2696 0 : rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
2697 0 : ereport(ERROR,
2698 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2699 : errmsg("inherited relation \"%s\" is not a table or foreign table",
2700 : inh->relname)));
2701 102 : for (count = 0; count < rel->rd_att->natts; count++)
2702 : {
2703 102 : Form_pg_attribute inhattr = TupleDescAttr(rel->rd_att,
2704 : count);
2705 102 : char *inhname = NameStr(inhattr->attname);
2706 :
2707 102 : if (inhattr->attisdropped)
2708 0 : continue;
2709 102 : if (strcmp(key, inhname) == 0)
2710 : {
2711 96 : found = true;
2712 96 : typid = inhattr->atttypid;
2713 :
2714 96 : if (constraint->contype == CONSTR_PRIMARY)
2715 84 : cxt->nnconstraints =
2716 84 : lappend(cxt->nnconstraints,
2717 84 : makeNotNullConstraint(makeString(pstrdup(inhname))));
2718 96 : break;
2719 : }
2720 : }
2721 96 : table_close(rel, NoLock);
2722 96 : if (found)
2723 96 : break;
2724 : }
2725 : }
2726 :
2727 : /*
2728 : * In the ALTER TABLE case, don't complain about index keys not
2729 : * created in the command; they may well exist already.
2730 : * DefineIndex will complain about them if not.
2731 : */
2732 27794 : if (!found && !cxt->isalter)
2733 12 : ereport(ERROR,
2734 : (errcode(ERRCODE_UNDEFINED_COLUMN),
2735 : errmsg("column \"%s\" named in key does not exist", key),
2736 : parser_errposition(cxt->pstate, constraint->location)));
2737 :
2738 : /* Check for PRIMARY KEY(foo, foo) */
2739 39020 : foreach(columns, index->indexParams)
2740 : {
2741 11238 : iparam = (IndexElem *) lfirst(columns);
2742 11238 : if (iparam->name && strcmp(key, iparam->name) == 0)
2743 : {
2744 0 : if (index->primary)
2745 0 : ereport(ERROR,
2746 : (errcode(ERRCODE_DUPLICATE_COLUMN),
2747 : errmsg("column \"%s\" appears twice in primary key constraint",
2748 : key),
2749 : parser_errposition(cxt->pstate, constraint->location)));
2750 : else
2751 0 : ereport(ERROR,
2752 : (errcode(ERRCODE_DUPLICATE_COLUMN),
2753 : errmsg("column \"%s\" appears twice in unique constraint",
2754 : key),
2755 : parser_errposition(cxt->pstate, constraint->location)));
2756 : }
2757 : }
2758 :
2759 : /*
2760 : * The WITHOUT OVERLAPS part (if any) must be a range or
2761 : * multirange type.
2762 : */
2763 27782 : if (constraint->without_overlaps && lc == list_last_cell(constraint->keys))
2764 : {
2765 578 : if (!found && cxt->isalter)
2766 : {
2767 : /*
2768 : * Look up the column type on existing table. If we can't
2769 : * find it, let things fail in DefineIndex.
2770 : */
2771 166 : Relation rel = cxt->rel;
2772 :
2773 336 : for (int i = 0; i < rel->rd_att->natts; i++)
2774 : {
2775 336 : Form_pg_attribute attr = TupleDescAttr(rel->rd_att, i);
2776 : const char *attname;
2777 :
2778 336 : if (attr->attisdropped)
2779 0 : break;
2780 :
2781 336 : attname = NameStr(attr->attname);
2782 336 : if (strcmp(attname, key) == 0)
2783 : {
2784 166 : found = true;
2785 166 : typid = attr->atttypid;
2786 166 : break;
2787 : }
2788 : }
2789 : }
2790 578 : if (found)
2791 : {
2792 578 : if (!OidIsValid(typid) && column)
2793 406 : typid = typenameTypeId(NULL, column->typeName);
2794 :
2795 578 : if (!OidIsValid(typid) || !(type_is_range(typid) || type_is_multirange(typid)))
2796 12 : ereport(ERROR,
2797 : (errcode(ERRCODE_DATATYPE_MISMATCH),
2798 : errmsg("column \"%s\" in WITHOUT OVERLAPS is not a range or multirange type", key),
2799 : parser_errposition(cxt->pstate, constraint->location)));
2800 : }
2801 : }
2802 :
2803 : /* OK, add it to the index definition */
2804 27770 : iparam = makeNode(IndexElem);
2805 27770 : iparam->name = pstrdup(key);
2806 27770 : iparam->expr = NULL;
2807 27770 : iparam->indexcolname = NULL;
2808 27770 : iparam->collation = NIL;
2809 27770 : iparam->opclass = NIL;
2810 27770 : iparam->opclassopts = NIL;
2811 27770 : iparam->ordering = SORTBY_DEFAULT;
2812 27770 : iparam->nulls_ordering = SORTBY_NULLS_DEFAULT;
2813 27770 : index->indexParams = lappend(index->indexParams, iparam);
2814 : }
2815 :
2816 19418 : if (constraint->without_overlaps)
2817 : {
2818 : /*
2819 : * This enforces that there is at least one equality column
2820 : * besides the WITHOUT OVERLAPS columns. This is per SQL
2821 : * standard. XXX Do we need this?
2822 : */
2823 566 : if (list_length(constraint->keys) < 2)
2824 12 : ereport(ERROR,
2825 : errcode(ERRCODE_SYNTAX_ERROR),
2826 : errmsg("constraint using WITHOUT OVERLAPS needs at least two columns"));
2827 :
2828 : /* WITHOUT OVERLAPS requires a GiST index */
2829 554 : index->accessMethod = "gist";
2830 : }
2831 :
2832 : }
2833 :
2834 : /*
2835 : * Add included columns to index definition. This is much like the
2836 : * simple-column-name-list code above, except that we don't worry about
2837 : * NOT NULL marking; included columns in a primary key should not be
2838 : * forced NOT NULL. We don't complain about duplicate columns, either,
2839 : * though maybe we should?
2840 : */
2841 19948 : foreach(lc, constraint->including)
2842 : {
2843 308 : char *key = strVal(lfirst(lc));
2844 308 : bool found = false;
2845 308 : ColumnDef *column = NULL;
2846 : ListCell *columns;
2847 : IndexElem *iparam;
2848 :
2849 662 : foreach(columns, cxt->columns)
2850 : {
2851 544 : column = lfirst_node(ColumnDef, columns);
2852 544 : if (strcmp(column->colname, key) == 0)
2853 : {
2854 190 : found = true;
2855 190 : break;
2856 : }
2857 : }
2858 :
2859 308 : if (!found)
2860 : {
2861 118 : if (SystemAttributeByName(key) != NULL)
2862 : {
2863 : /*
2864 : * column will be a system column in the new table, so accept
2865 : * it.
2866 : */
2867 0 : found = true;
2868 : }
2869 118 : else if (cxt->inhRelations)
2870 : {
2871 : /* try inherited tables */
2872 : ListCell *inher;
2873 :
2874 0 : foreach(inher, cxt->inhRelations)
2875 : {
2876 0 : RangeVar *inh = lfirst_node(RangeVar, inher);
2877 : Relation rel;
2878 : int count;
2879 :
2880 0 : rel = table_openrv(inh, AccessShareLock);
2881 : /* check user requested inheritance from valid relkind */
2882 0 : if (rel->rd_rel->relkind != RELKIND_RELATION &&
2883 0 : rel->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
2884 0 : rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
2885 0 : ereport(ERROR,
2886 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2887 : errmsg("inherited relation \"%s\" is not a table or foreign table",
2888 : inh->relname)));
2889 0 : for (count = 0; count < rel->rd_att->natts; count++)
2890 : {
2891 0 : Form_pg_attribute inhattr = TupleDescAttr(rel->rd_att,
2892 : count);
2893 0 : char *inhname = NameStr(inhattr->attname);
2894 :
2895 0 : if (inhattr->attisdropped)
2896 0 : continue;
2897 0 : if (strcmp(key, inhname) == 0)
2898 : {
2899 0 : found = true;
2900 0 : break;
2901 : }
2902 : }
2903 0 : table_close(rel, NoLock);
2904 0 : if (found)
2905 0 : break;
2906 : }
2907 : }
2908 : }
2909 :
2910 : /*
2911 : * In the ALTER TABLE case, don't complain about index keys not
2912 : * created in the command; they may well exist already. DefineIndex
2913 : * will complain about them if not.
2914 : */
2915 308 : if (!found && !cxt->isalter)
2916 0 : ereport(ERROR,
2917 : (errcode(ERRCODE_UNDEFINED_COLUMN),
2918 : errmsg("column \"%s\" named in key does not exist", key),
2919 : parser_errposition(cxt->pstate, constraint->location)));
2920 :
2921 : /* OK, add it to the index definition */
2922 308 : iparam = makeNode(IndexElem);
2923 308 : iparam->name = pstrdup(key);
2924 308 : iparam->expr = NULL;
2925 308 : iparam->indexcolname = NULL;
2926 308 : iparam->collation = NIL;
2927 308 : iparam->opclass = NIL;
2928 308 : iparam->opclassopts = NIL;
2929 308 : index->indexIncludingParams = lappend(index->indexIncludingParams, iparam);
2930 : }
2931 :
2932 19640 : return index;
2933 : }
2934 :
2935 : /*
2936 : * transformCheckConstraints
2937 : * handle CHECK constraints
2938 : *
2939 : * Right now, there's nothing to do here when called from ALTER TABLE,
2940 : * but the other constraint-transformation functions are called in both
2941 : * the CREATE TABLE and ALTER TABLE paths, so do the same here, and just
2942 : * don't do anything if we're not authorized to skip validation.
2943 : */
2944 : static void
2945 61638 : transformCheckConstraints(CreateStmtContext *cxt, bool skipValidation)
2946 : {
2947 : ListCell *ckclist;
2948 :
2949 61638 : if (cxt->ckconstraints == NIL)
2950 59864 : return;
2951 :
2952 : /*
2953 : * When creating a new table (but not a foreign table), we can safely skip
2954 : * the validation of check constraints and mark them as valid based on the
2955 : * constraint enforcement flag, since NOT ENFORCED constraints must always
2956 : * be marked as NOT VALID. (This will override any user-supplied NOT VALID
2957 : * flag.)
2958 : */
2959 1774 : if (skipValidation)
2960 : {
2961 1600 : foreach(ckclist, cxt->ckconstraints)
2962 : {
2963 870 : Constraint *constraint = (Constraint *) lfirst(ckclist);
2964 :
2965 870 : constraint->skip_validation = true;
2966 870 : constraint->initially_valid = constraint->is_enforced;
2967 : }
2968 : }
2969 : }
2970 :
2971 : /*
2972 : * transformFKConstraints
2973 : * handle FOREIGN KEY constraints
2974 : */
2975 : static void
2976 61638 : transformFKConstraints(CreateStmtContext *cxt,
2977 : bool skipValidation, bool isAddConstraint)
2978 : {
2979 : ListCell *fkclist;
2980 :
2981 61638 : if (cxt->fkconstraints == NIL)
2982 57582 : return;
2983 :
2984 : /*
2985 : * If CREATE TABLE or adding a column with NULL default, we can safely
2986 : * skip validation of FK constraints, and mark them as valid based on the
2987 : * constraint enforcement flag, since NOT ENFORCED constraints must always
2988 : * be marked as NOT VALID. (This will override any user-supplied NOT VALID
2989 : * flag.)
2990 : */
2991 4056 : if (skipValidation)
2992 : {
2993 2872 : foreach(fkclist, cxt->fkconstraints)
2994 : {
2995 1470 : Constraint *constraint = (Constraint *) lfirst(fkclist);
2996 :
2997 1470 : constraint->skip_validation = true;
2998 1470 : constraint->initially_valid = constraint->is_enforced;
2999 : }
3000 : }
3001 :
3002 : /*
3003 : * For CREATE TABLE or ALTER TABLE ADD COLUMN, gin up an ALTER TABLE ADD
3004 : * CONSTRAINT command to execute after the basic command is complete. (If
3005 : * called from ADD CONSTRAINT, that routine will add the FK constraints to
3006 : * its own subcommand list.)
3007 : *
3008 : * Note: the ADD CONSTRAINT command must also execute after any index
3009 : * creation commands. Thus, this should run after
3010 : * transformIndexConstraints, so that the CREATE INDEX commands are
3011 : * already in cxt->alist. See also the handling of cxt->likeclauses.
3012 : */
3013 4056 : if (!isAddConstraint)
3014 : {
3015 1396 : AlterTableStmt *alterstmt = makeNode(AlterTableStmt);
3016 :
3017 1396 : alterstmt->relation = cxt->relation;
3018 1396 : alterstmt->cmds = NIL;
3019 1396 : alterstmt->objtype = OBJECT_TABLE;
3020 :
3021 2860 : foreach(fkclist, cxt->fkconstraints)
3022 : {
3023 1464 : Constraint *constraint = (Constraint *) lfirst(fkclist);
3024 1464 : AlterTableCmd *altercmd = makeNode(AlterTableCmd);
3025 :
3026 1464 : altercmd->subtype = AT_AddConstraint;
3027 1464 : altercmd->name = NULL;
3028 1464 : altercmd->def = (Node *) constraint;
3029 1464 : alterstmt->cmds = lappend(alterstmt->cmds, altercmd);
3030 : }
3031 :
3032 1396 : cxt->alist = lappend(cxt->alist, alterstmt);
3033 : }
3034 : }
3035 :
3036 : /*
3037 : * transformIndexStmt - parse analysis for CREATE INDEX and ALTER TABLE
3038 : *
3039 : * Note: this is a no-op for an index not using either index expressions or
3040 : * a predicate expression. There are several code paths that create indexes
3041 : * without bothering to call this, because they know they don't have any
3042 : * such expressions to deal with.
3043 : *
3044 : * To avoid race conditions, it's important that this function rely only on
3045 : * the passed-in relid (and not on stmt->relation) to determine the target
3046 : * relation.
3047 : */
3048 : IndexStmt *
3049 26256 : transformIndexStmt(Oid relid, IndexStmt *stmt, const char *queryString)
3050 : {
3051 : ParseState *pstate;
3052 : ParseNamespaceItem *nsitem;
3053 : ListCell *l;
3054 : Relation rel;
3055 :
3056 : /* Nothing to do if statement already transformed. */
3057 26256 : if (stmt->transformed)
3058 130 : return stmt;
3059 :
3060 : /* Set up pstate */
3061 26126 : pstate = make_parsestate(NULL);
3062 26126 : pstate->p_sourcetext = queryString;
3063 :
3064 : /*
3065 : * Put the parent table into the rtable so that the expressions can refer
3066 : * to its fields without qualification. Caller is responsible for locking
3067 : * relation, but we still need to open it.
3068 : */
3069 26126 : rel = relation_open(relid, NoLock);
3070 26126 : nsitem = addRangeTableEntryForRelation(pstate, rel,
3071 : AccessShareLock,
3072 : NULL, false, true);
3073 :
3074 : /* no to join list, yes to namespaces */
3075 26126 : addNSItemToQuery(pstate, nsitem, false, true, true);
3076 :
3077 : /* take care of the where clause */
3078 26126 : if (stmt->whereClause)
3079 : {
3080 392 : stmt->whereClause = transformWhereClause(pstate,
3081 : stmt->whereClause,
3082 : EXPR_KIND_INDEX_PREDICATE,
3083 : "WHERE");
3084 : /* we have to fix its collations too */
3085 392 : assign_expr_collations(pstate, stmt->whereClause);
3086 : }
3087 :
3088 : /* take care of any index expressions */
3089 62372 : foreach(l, stmt->indexParams)
3090 : {
3091 36258 : IndexElem *ielem = (IndexElem *) lfirst(l);
3092 :
3093 36258 : if (ielem->expr)
3094 : {
3095 : /* Extract preliminary index col name before transforming expr */
3096 952 : if (ielem->indexcolname == NULL)
3097 952 : ielem->indexcolname = FigureIndexColname(ielem->expr);
3098 :
3099 : /* Now do parse transformation of the expression */
3100 952 : ielem->expr = transformExpr(pstate, ielem->expr,
3101 : EXPR_KIND_INDEX_EXPRESSION);
3102 :
3103 : /* We have to fix its collations too */
3104 940 : assign_expr_collations(pstate, ielem->expr);
3105 :
3106 : /*
3107 : * transformExpr() should have already rejected subqueries,
3108 : * aggregates, window functions, and SRFs, based on the EXPR_KIND_
3109 : * for an index expression.
3110 : *
3111 : * DefineIndex() will make more checks.
3112 : */
3113 : }
3114 : }
3115 :
3116 : /*
3117 : * Check that only the base rel is mentioned. (This should be dead code
3118 : * now that add_missing_from is history.)
3119 : */
3120 26114 : if (list_length(pstate->p_rtable) != 1)
3121 0 : ereport(ERROR,
3122 : (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
3123 : errmsg("index expressions and predicates can refer only to the table being indexed")));
3124 :
3125 26114 : free_parsestate(pstate);
3126 :
3127 : /* Close relation */
3128 26114 : table_close(rel, NoLock);
3129 :
3130 : /* Mark statement as successfully transformed */
3131 26114 : stmt->transformed = true;
3132 :
3133 26114 : return stmt;
3134 : }
3135 :
3136 : /*
3137 : * transformStatsStmt - parse analysis for CREATE STATISTICS
3138 : *
3139 : * To avoid race conditions, it's important that this function relies only on
3140 : * the passed-in relid (and not on stmt->relation) to determine the target
3141 : * relation.
3142 : */
3143 : CreateStatsStmt *
3144 748 : transformStatsStmt(Oid relid, CreateStatsStmt *stmt, const char *queryString)
3145 : {
3146 : ParseState *pstate;
3147 : ParseNamespaceItem *nsitem;
3148 : ListCell *l;
3149 : Relation rel;
3150 :
3151 : /* Nothing to do if statement already transformed. */
3152 748 : if (stmt->transformed)
3153 48 : return stmt;
3154 :
3155 : /* Set up pstate */
3156 700 : pstate = make_parsestate(NULL);
3157 700 : pstate->p_sourcetext = queryString;
3158 :
3159 : /*
3160 : * Put the parent table into the rtable so that the expressions can refer
3161 : * to its fields without qualification. Caller is responsible for locking
3162 : * relation, but we still need to open it.
3163 : */
3164 700 : rel = relation_open(relid, NoLock);
3165 700 : nsitem = addRangeTableEntryForRelation(pstate, rel,
3166 : AccessShareLock,
3167 : NULL, false, true);
3168 :
3169 : /* no to join list, yes to namespaces */
3170 700 : addNSItemToQuery(pstate, nsitem, false, true, true);
3171 :
3172 : /* take care of any expressions */
3173 2366 : foreach(l, stmt->exprs)
3174 : {
3175 1666 : StatsElem *selem = (StatsElem *) lfirst(l);
3176 :
3177 1666 : if (selem->expr)
3178 : {
3179 : /* Now do parse transformation of the expression */
3180 510 : selem->expr = transformExpr(pstate, selem->expr,
3181 : EXPR_KIND_STATS_EXPRESSION);
3182 :
3183 : /* We have to fix its collations too */
3184 510 : assign_expr_collations(pstate, selem->expr);
3185 : }
3186 : }
3187 :
3188 : /*
3189 : * Check that only the base rel is mentioned. (This should be dead code
3190 : * now that add_missing_from is history.)
3191 : */
3192 700 : if (list_length(pstate->p_rtable) != 1)
3193 0 : ereport(ERROR,
3194 : (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
3195 : errmsg("statistics expressions can refer only to the table being referenced")));
3196 :
3197 700 : free_parsestate(pstate);
3198 :
3199 : /* Close relation */
3200 700 : table_close(rel, NoLock);
3201 :
3202 : /* Mark statement as successfully transformed */
3203 700 : stmt->transformed = true;
3204 :
3205 700 : return stmt;
3206 : }
3207 :
3208 :
3209 : /*
3210 : * transformRuleStmt -
3211 : * transform a CREATE RULE Statement. The action is a list of parse
3212 : * trees which is transformed into a list of query trees, and we also
3213 : * transform the WHERE clause if any.
3214 : *
3215 : * actions and whereClause are output parameters that receive the
3216 : * transformed results.
3217 : */
3218 : void
3219 1092 : transformRuleStmt(RuleStmt *stmt, const char *queryString,
3220 : List **actions, Node **whereClause)
3221 : {
3222 : Relation rel;
3223 : ParseState *pstate;
3224 : ParseNamespaceItem *oldnsitem;
3225 : ParseNamespaceItem *newnsitem;
3226 :
3227 : /*
3228 : * To avoid deadlock, make sure the first thing we do is grab
3229 : * AccessExclusiveLock on the target relation. This will be needed by
3230 : * DefineQueryRewrite(), and we don't want to grab a lesser lock
3231 : * beforehand.
3232 : */
3233 1092 : rel = table_openrv(stmt->relation, AccessExclusiveLock);
3234 :
3235 1092 : if (rel->rd_rel->relkind == RELKIND_MATVIEW)
3236 0 : ereport(ERROR,
3237 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3238 : errmsg("rules on materialized views are not supported")));
3239 :
3240 : /* Set up pstate */
3241 1092 : pstate = make_parsestate(NULL);
3242 1092 : pstate->p_sourcetext = queryString;
3243 :
3244 : /*
3245 : * NOTE: 'OLD' must always have a varno equal to 1 and 'NEW' equal to 2.
3246 : * Set up their ParseNamespaceItems in the main pstate for use in parsing
3247 : * the rule qualification.
3248 : */
3249 1092 : oldnsitem = addRangeTableEntryForRelation(pstate, rel,
3250 : AccessShareLock,
3251 : makeAlias("old", NIL),
3252 : false, false);
3253 1092 : newnsitem = addRangeTableEntryForRelation(pstate, rel,
3254 : AccessShareLock,
3255 : makeAlias("new", NIL),
3256 : false, false);
3257 :
3258 : /*
3259 : * They must be in the namespace too for lookup purposes, but only add the
3260 : * one(s) that are relevant for the current kind of rule. In an UPDATE
3261 : * rule, quals must refer to OLD.field or NEW.field to be unambiguous, but
3262 : * there's no need to be so picky for INSERT & DELETE. We do not add them
3263 : * to the joinlist.
3264 : */
3265 1092 : switch (stmt->event)
3266 : {
3267 18 : case CMD_SELECT:
3268 18 : addNSItemToQuery(pstate, oldnsitem, false, true, true);
3269 18 : break;
3270 432 : case CMD_UPDATE:
3271 432 : addNSItemToQuery(pstate, oldnsitem, false, true, true);
3272 432 : addNSItemToQuery(pstate, newnsitem, false, true, true);
3273 432 : break;
3274 478 : case CMD_INSERT:
3275 478 : addNSItemToQuery(pstate, newnsitem, false, true, true);
3276 478 : break;
3277 164 : case CMD_DELETE:
3278 164 : addNSItemToQuery(pstate, oldnsitem, false, true, true);
3279 164 : break;
3280 0 : default:
3281 0 : elog(ERROR, "unrecognized event type: %d",
3282 : (int) stmt->event);
3283 : break;
3284 : }
3285 :
3286 : /* take care of the where clause */
3287 1092 : *whereClause = transformWhereClause(pstate,
3288 : stmt->whereClause,
3289 : EXPR_KIND_WHERE,
3290 : "WHERE");
3291 : /* we have to fix its collations too */
3292 1092 : assign_expr_collations(pstate, *whereClause);
3293 :
3294 : /* this is probably dead code without add_missing_from: */
3295 1092 : if (list_length(pstate->p_rtable) != 2) /* naughty, naughty... */
3296 0 : ereport(ERROR,
3297 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3298 : errmsg("rule WHERE condition cannot contain references to other relations")));
3299 :
3300 : /*
3301 : * 'instead nothing' rules with a qualification need a query rangetable so
3302 : * the rewrite handler can add the negated rule qualification to the
3303 : * original query. We create a query with the new command type CMD_NOTHING
3304 : * here that is treated specially by the rewrite system.
3305 : */
3306 1092 : if (stmt->actions == NIL)
3307 : {
3308 162 : Query *nothing_qry = makeNode(Query);
3309 :
3310 162 : nothing_qry->commandType = CMD_NOTHING;
3311 162 : nothing_qry->rtable = pstate->p_rtable;
3312 162 : nothing_qry->rteperminfos = pstate->p_rteperminfos;
3313 162 : nothing_qry->jointree = makeFromExpr(NIL, NULL); /* no join wanted */
3314 :
3315 162 : *actions = list_make1(nothing_qry);
3316 : }
3317 : else
3318 : {
3319 : ListCell *l;
3320 930 : List *newactions = NIL;
3321 :
3322 : /*
3323 : * transform each statement, like parse_sub_analyze()
3324 : */
3325 1888 : foreach(l, stmt->actions)
3326 : {
3327 976 : Node *action = (Node *) lfirst(l);
3328 976 : ParseState *sub_pstate = make_parsestate(NULL);
3329 : Query *sub_qry,
3330 : *top_subqry;
3331 : bool has_old,
3332 : has_new;
3333 :
3334 : /*
3335 : * Since outer ParseState isn't parent of inner, have to pass down
3336 : * the query text by hand.
3337 : */
3338 976 : sub_pstate->p_sourcetext = queryString;
3339 :
3340 : /*
3341 : * Set up OLD/NEW in the rtable for this statement. The entries
3342 : * are added only to relnamespace, not varnamespace, because we
3343 : * don't want them to be referred to by unqualified field names
3344 : * nor "*" in the rule actions. We decide later whether to put
3345 : * them in the joinlist.
3346 : */
3347 976 : oldnsitem = addRangeTableEntryForRelation(sub_pstate, rel,
3348 : AccessShareLock,
3349 : makeAlias("old", NIL),
3350 : false, false);
3351 976 : newnsitem = addRangeTableEntryForRelation(sub_pstate, rel,
3352 : AccessShareLock,
3353 : makeAlias("new", NIL),
3354 : false, false);
3355 976 : addNSItemToQuery(sub_pstate, oldnsitem, false, true, false);
3356 976 : addNSItemToQuery(sub_pstate, newnsitem, false, true, false);
3357 :
3358 : /* Transform the rule action statement */
3359 976 : top_subqry = transformStmt(sub_pstate, action);
3360 :
3361 : /*
3362 : * We cannot support utility-statement actions (eg NOTIFY) with
3363 : * nonempty rule WHERE conditions, because there's no way to make
3364 : * the utility action execute conditionally.
3365 : */
3366 964 : if (top_subqry->commandType == CMD_UTILITY &&
3367 40 : *whereClause != NULL)
3368 0 : ereport(ERROR,
3369 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3370 : errmsg("rules with WHERE conditions can only have SELECT, INSERT, UPDATE, or DELETE actions")));
3371 :
3372 : /*
3373 : * If the action is INSERT...SELECT, OLD/NEW have been pushed down
3374 : * into the SELECT, and that's what we need to look at. (Ugly
3375 : * kluge ... try to fix this when we redesign querytrees.)
3376 : */
3377 964 : sub_qry = getInsertSelectQuery(top_subqry, NULL);
3378 :
3379 : /*
3380 : * If the sub_qry is a setop, we cannot attach any qualifications
3381 : * to it, because the planner won't notice them. This could
3382 : * perhaps be relaxed someday, but for now, we may as well reject
3383 : * such a rule immediately.
3384 : */
3385 964 : if (sub_qry->setOperations != NULL && *whereClause != NULL)
3386 0 : ereport(ERROR,
3387 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3388 : errmsg("conditional UNION/INTERSECT/EXCEPT statements are not implemented")));
3389 :
3390 : /*
3391 : * Validate action's use of OLD/NEW, qual too
3392 : */
3393 964 : has_old =
3394 1540 : rangeTableEntry_used((Node *) sub_qry, PRS2_OLD_VARNO, 0) ||
3395 576 : rangeTableEntry_used(*whereClause, PRS2_OLD_VARNO, 0);
3396 964 : has_new =
3397 1286 : rangeTableEntry_used((Node *) sub_qry, PRS2_NEW_VARNO, 0) ||
3398 322 : rangeTableEntry_used(*whereClause, PRS2_NEW_VARNO, 0);
3399 :
3400 964 : switch (stmt->event)
3401 : {
3402 18 : case CMD_SELECT:
3403 18 : if (has_old)
3404 0 : ereport(ERROR,
3405 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3406 : errmsg("ON SELECT rule cannot use OLD")));
3407 18 : if (has_new)
3408 0 : ereport(ERROR,
3409 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3410 : errmsg("ON SELECT rule cannot use NEW")));
3411 18 : break;
3412 344 : case CMD_UPDATE:
3413 : /* both are OK */
3414 344 : break;
3415 434 : case CMD_INSERT:
3416 434 : if (has_old)
3417 0 : ereport(ERROR,
3418 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3419 : errmsg("ON INSERT rule cannot use OLD")));
3420 434 : break;
3421 168 : case CMD_DELETE:
3422 168 : if (has_new)
3423 0 : ereport(ERROR,
3424 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3425 : errmsg("ON DELETE rule cannot use NEW")));
3426 168 : break;
3427 0 : default:
3428 0 : elog(ERROR, "unrecognized event type: %d",
3429 : (int) stmt->event);
3430 : break;
3431 : }
3432 :
3433 : /*
3434 : * OLD/NEW are not allowed in WITH queries, because they would
3435 : * amount to outer references for the WITH, which we disallow.
3436 : * However, they were already in the outer rangetable when we
3437 : * analyzed the query, so we have to check.
3438 : *
3439 : * Note that in the INSERT...SELECT case, we need to examine the
3440 : * CTE lists of both top_subqry and sub_qry.
3441 : *
3442 : * Note that we aren't digging into the body of the query looking
3443 : * for WITHs in nested sub-SELECTs. A WITH down there can
3444 : * legitimately refer to OLD/NEW, because it'd be an
3445 : * indirect-correlated outer reference.
3446 : */
3447 964 : if (rangeTableEntry_used((Node *) top_subqry->cteList,
3448 958 : PRS2_OLD_VARNO, 0) ||
3449 958 : rangeTableEntry_used((Node *) sub_qry->cteList,
3450 : PRS2_OLD_VARNO, 0))
3451 6 : ereport(ERROR,
3452 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3453 : errmsg("cannot refer to OLD within WITH query")));
3454 958 : if (rangeTableEntry_used((Node *) top_subqry->cteList,
3455 958 : PRS2_NEW_VARNO, 0) ||
3456 958 : rangeTableEntry_used((Node *) sub_qry->cteList,
3457 : PRS2_NEW_VARNO, 0))
3458 0 : ereport(ERROR,
3459 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3460 : errmsg("cannot refer to NEW within WITH query")));
3461 :
3462 : /*
3463 : * For efficiency's sake, add OLD to the rule action's jointree
3464 : * only if it was actually referenced in the statement or qual.
3465 : *
3466 : * For INSERT, NEW is not really a relation (only a reference to
3467 : * the to-be-inserted tuple) and should never be added to the
3468 : * jointree.
3469 : *
3470 : * For UPDATE, we treat NEW as being another kind of reference to
3471 : * OLD, because it represents references to *transformed* tuples
3472 : * of the existing relation. It would be wrong to enter NEW
3473 : * separately in the jointree, since that would cause a double
3474 : * join of the updated relation. It's also wrong to fail to make
3475 : * a jointree entry if only NEW and not OLD is mentioned.
3476 : */
3477 958 : if (has_old || (has_new && stmt->event == CMD_UPDATE))
3478 : {
3479 : RangeTblRef *rtr;
3480 :
3481 : /*
3482 : * If sub_qry is a setop, manipulating its jointree will do no
3483 : * good at all, because the jointree is dummy. (This should be
3484 : * a can't-happen case because of prior tests.)
3485 : */
3486 430 : if (sub_qry->setOperations != NULL)
3487 0 : ereport(ERROR,
3488 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3489 : errmsg("conditional UNION/INTERSECT/EXCEPT statements are not implemented")));
3490 : /* hackishly add OLD to the already-built FROM clause */
3491 430 : rtr = makeNode(RangeTblRef);
3492 430 : rtr->rtindex = oldnsitem->p_rtindex;
3493 430 : sub_qry->jointree->fromlist =
3494 430 : lappend(sub_qry->jointree->fromlist, rtr);
3495 : }
3496 :
3497 958 : newactions = lappend(newactions, top_subqry);
3498 :
3499 958 : free_parsestate(sub_pstate);
3500 : }
3501 :
3502 912 : *actions = newactions;
3503 : }
3504 :
3505 1074 : free_parsestate(pstate);
3506 :
3507 : /* Close relation, but keep the exclusive lock */
3508 1074 : table_close(rel, NoLock);
3509 1074 : }
3510 :
3511 :
3512 : /*
3513 : * transformAlterTableStmt -
3514 : * parse analysis for ALTER TABLE
3515 : *
3516 : * Returns the transformed AlterTableStmt. There may be additional actions
3517 : * to be done before and after the transformed statement, which are returned
3518 : * in *beforeStmts and *afterStmts as lists of utility command parsetrees.
3519 : *
3520 : * To avoid race conditions, it's important that this function rely only on
3521 : * the passed-in relid (and not on stmt->relation) to determine the target
3522 : * relation.
3523 : */
3524 : AlterTableStmt *
3525 23596 : transformAlterTableStmt(Oid relid, AlterTableStmt *stmt,
3526 : const char *queryString,
3527 : List **beforeStmts, List **afterStmts)
3528 : {
3529 : Relation rel;
3530 : TupleDesc tupdesc;
3531 : ParseState *pstate;
3532 : CreateStmtContext cxt;
3533 : List *save_alist;
3534 : ListCell *lcmd,
3535 : *l;
3536 23596 : List *newcmds = NIL;
3537 23596 : bool skipValidation = true;
3538 : AlterTableCmd *newcmd;
3539 : ParseNamespaceItem *nsitem;
3540 :
3541 : /* Caller is responsible for locking the relation */
3542 23596 : rel = relation_open(relid, NoLock);
3543 23596 : tupdesc = RelationGetDescr(rel);
3544 :
3545 : /* Set up pstate */
3546 23596 : pstate = make_parsestate(NULL);
3547 23596 : pstate->p_sourcetext = queryString;
3548 23596 : nsitem = addRangeTableEntryForRelation(pstate,
3549 : rel,
3550 : AccessShareLock,
3551 : NULL,
3552 : false,
3553 : true);
3554 23596 : addNSItemToQuery(pstate, nsitem, false, true, true);
3555 :
3556 : /* Set up CreateStmtContext */
3557 23596 : cxt.pstate = pstate;
3558 23596 : if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
3559 : {
3560 180 : cxt.stmtType = "ALTER FOREIGN TABLE";
3561 180 : cxt.isforeign = true;
3562 : }
3563 : else
3564 : {
3565 23416 : cxt.stmtType = "ALTER TABLE";
3566 23416 : cxt.isforeign = false;
3567 : }
3568 23596 : cxt.relation = stmt->relation;
3569 23596 : cxt.rel = rel;
3570 23596 : cxt.inhRelations = NIL;
3571 23596 : cxt.isalter = true;
3572 23596 : cxt.columns = NIL;
3573 23596 : cxt.ckconstraints = NIL;
3574 23596 : cxt.nnconstraints = NIL;
3575 23596 : cxt.fkconstraints = NIL;
3576 23596 : cxt.ixconstraints = NIL;
3577 23596 : cxt.likeclauses = NIL;
3578 23596 : cxt.blist = NIL;
3579 23596 : cxt.alist = NIL;
3580 23596 : cxt.pkey = NULL;
3581 23596 : cxt.ispartitioned = (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE);
3582 23596 : cxt.partbound = NULL;
3583 23596 : cxt.ofType = false;
3584 :
3585 : /*
3586 : * Transform ALTER subcommands that need it (most don't). These largely
3587 : * re-use code from CREATE TABLE.
3588 : */
3589 47150 : foreach(lcmd, stmt->cmds)
3590 : {
3591 23596 : AlterTableCmd *cmd = (AlterTableCmd *) lfirst(lcmd);
3592 :
3593 23596 : switch (cmd->subtype)
3594 : {
3595 2072 : case AT_AddColumn:
3596 : {
3597 2072 : ColumnDef *def = castNode(ColumnDef, cmd->def);
3598 :
3599 2072 : transformColumnDefinition(&cxt, def);
3600 :
3601 : /*
3602 : * If the column has a non-null default, we can't skip
3603 : * validation of foreign keys.
3604 : */
3605 2066 : if (def->raw_default != NULL)
3606 854 : skipValidation = false;
3607 :
3608 : /*
3609 : * All constraints are processed in other ways. Remove the
3610 : * original list
3611 : */
3612 2066 : def->constraints = NIL;
3613 :
3614 2066 : newcmds = lappend(newcmds, cmd);
3615 2066 : break;
3616 : }
3617 :
3618 16602 : case AT_AddConstraint:
3619 :
3620 : /*
3621 : * The original AddConstraint cmd node doesn't go to newcmds
3622 : */
3623 16602 : if (IsA(cmd->def, Constraint))
3624 : {
3625 16602 : transformTableConstraint(&cxt, (Constraint *) cmd->def);
3626 16596 : if (((Constraint *) cmd->def)->contype == CONSTR_FOREIGN)
3627 2654 : skipValidation = false;
3628 : }
3629 : else
3630 0 : elog(ERROR, "unrecognized node type: %d",
3631 : (int) nodeTag(cmd->def));
3632 16596 : break;
3633 :
3634 1318 : case AT_AlterColumnType:
3635 : {
3636 1318 : ColumnDef *def = castNode(ColumnDef, cmd->def);
3637 : AttrNumber attnum;
3638 :
3639 : /*
3640 : * For ALTER COLUMN TYPE, transform the USING clause if
3641 : * one was specified.
3642 : */
3643 1318 : if (def->raw_default)
3644 : {
3645 252 : def->cooked_default =
3646 252 : transformExpr(pstate, def->raw_default,
3647 : EXPR_KIND_ALTER_COL_TRANSFORM);
3648 : }
3649 :
3650 : /*
3651 : * For identity column, create ALTER SEQUENCE command to
3652 : * change the data type of the sequence. Identity sequence
3653 : * is associated with the top level partitioned table.
3654 : * Hence ignore partitions.
3655 : */
3656 1318 : if (!RelationGetForm(rel)->relispartition)
3657 : {
3658 1216 : attnum = get_attnum(relid, cmd->name);
3659 1216 : if (attnum == InvalidAttrNumber)
3660 0 : ereport(ERROR,
3661 : (errcode(ERRCODE_UNDEFINED_COLUMN),
3662 : errmsg("column \"%s\" of relation \"%s\" does not exist",
3663 : cmd->name, RelationGetRelationName(rel))));
3664 :
3665 1216 : if (attnum > 0 &&
3666 1210 : TupleDescAttr(tupdesc, attnum - 1)->attidentity)
3667 : {
3668 36 : Oid seq_relid = getIdentitySequence(rel, attnum, false);
3669 36 : Oid typeOid = typenameTypeId(pstate, def->typeName);
3670 36 : AlterSeqStmt *altseqstmt = makeNode(AlterSeqStmt);
3671 :
3672 : altseqstmt->sequence
3673 36 : = makeRangeVar(get_namespace_name(get_rel_namespace(seq_relid)),
3674 : get_rel_name(seq_relid),
3675 : -1);
3676 36 : altseqstmt->options = list_make1(makeDefElem("as",
3677 : (Node *) makeTypeNameFromOid(typeOid, -1),
3678 : -1));
3679 36 : altseqstmt->for_identity = true;
3680 36 : cxt.blist = lappend(cxt.blist, altseqstmt);
3681 : }
3682 : }
3683 :
3684 1318 : newcmds = lappend(newcmds, cmd);
3685 1318 : break;
3686 : }
3687 :
3688 166 : case AT_AddIdentity:
3689 : {
3690 166 : Constraint *def = castNode(Constraint, cmd->def);
3691 166 : ColumnDef *newdef = makeNode(ColumnDef);
3692 : AttrNumber attnum;
3693 :
3694 166 : newdef->colname = cmd->name;
3695 166 : newdef->identity = def->generated_when;
3696 166 : cmd->def = (Node *) newdef;
3697 :
3698 166 : attnum = get_attnum(relid, cmd->name);
3699 166 : if (attnum == InvalidAttrNumber)
3700 6 : ereport(ERROR,
3701 : (errcode(ERRCODE_UNDEFINED_COLUMN),
3702 : errmsg("column \"%s\" of relation \"%s\" does not exist",
3703 : cmd->name, RelationGetRelationName(rel))));
3704 :
3705 160 : generateSerialExtraStmts(&cxt, newdef,
3706 : get_atttype(relid, attnum),
3707 : def->options, true, true,
3708 : NULL, NULL);
3709 :
3710 160 : newcmds = lappend(newcmds, cmd);
3711 160 : break;
3712 : }
3713 :
3714 62 : case AT_SetIdentity:
3715 : {
3716 : /*
3717 : * Create an ALTER SEQUENCE statement for the internal
3718 : * sequence of the identity column.
3719 : */
3720 : ListCell *lc;
3721 62 : List *newseqopts = NIL;
3722 62 : List *newdef = NIL;
3723 : AttrNumber attnum;
3724 : Oid seq_relid;
3725 :
3726 : /*
3727 : * Split options into those handled by ALTER SEQUENCE and
3728 : * those for ALTER TABLE proper.
3729 : */
3730 184 : foreach(lc, castNode(List, cmd->def))
3731 : {
3732 122 : DefElem *def = lfirst_node(DefElem, lc);
3733 :
3734 122 : if (strcmp(def->defname, "generated") == 0)
3735 44 : newdef = lappend(newdef, def);
3736 : else
3737 78 : newseqopts = lappend(newseqopts, def);
3738 : }
3739 :
3740 62 : attnum = get_attnum(relid, cmd->name);
3741 62 : if (attnum == InvalidAttrNumber)
3742 0 : ereport(ERROR,
3743 : (errcode(ERRCODE_UNDEFINED_COLUMN),
3744 : errmsg("column \"%s\" of relation \"%s\" does not exist",
3745 : cmd->name, RelationGetRelationName(rel))));
3746 :
3747 62 : seq_relid = getIdentitySequence(rel, attnum, true);
3748 :
3749 62 : if (seq_relid)
3750 : {
3751 : AlterSeqStmt *seqstmt;
3752 :
3753 50 : seqstmt = makeNode(AlterSeqStmt);
3754 50 : seqstmt->sequence = makeRangeVar(get_namespace_name(get_rel_namespace(seq_relid)),
3755 : get_rel_name(seq_relid), -1);
3756 50 : seqstmt->options = newseqopts;
3757 50 : seqstmt->for_identity = true;
3758 50 : seqstmt->missing_ok = false;
3759 :
3760 50 : cxt.blist = lappend(cxt.blist, seqstmt);
3761 : }
3762 :
3763 : /*
3764 : * If column was not an identity column, we just let the
3765 : * ALTER TABLE command error out later. (There are cases
3766 : * this fails to cover, but we'll need to restructure
3767 : * where creation of the sequence dependency linkage
3768 : * happens before we can fix it.)
3769 : */
3770 :
3771 62 : cmd->def = (Node *) newdef;
3772 62 : newcmds = lappend(newcmds, cmd);
3773 62 : break;
3774 : }
3775 :
3776 3376 : case AT_AttachPartition:
3777 : case AT_DetachPartition:
3778 : {
3779 3376 : PartitionCmd *partcmd = (PartitionCmd *) cmd->def;
3780 :
3781 3376 : transformPartitionCmd(&cxt, partcmd);
3782 : /* assign transformed value of the partition bound */
3783 3352 : partcmd->bound = cxt.partbound;
3784 : }
3785 :
3786 3352 : newcmds = lappend(newcmds, cmd);
3787 3352 : break;
3788 :
3789 0 : default:
3790 :
3791 : /*
3792 : * Currently, we shouldn't actually get here for subcommand
3793 : * types that don't require transformation; but if we do, just
3794 : * emit them unchanged.
3795 : */
3796 0 : newcmds = lappend(newcmds, cmd);
3797 0 : break;
3798 : }
3799 : }
3800 :
3801 : /*
3802 : * Transfer anything we already have in cxt.alist into save_alist, to keep
3803 : * it separate from the output of transformIndexConstraints.
3804 : */
3805 23554 : save_alist = cxt.alist;
3806 23554 : cxt.alist = NIL;
3807 :
3808 : /* Postprocess constraints */
3809 23554 : transformIndexConstraints(&cxt);
3810 23530 : transformFKConstraints(&cxt, skipValidation, true);
3811 23530 : transformCheckConstraints(&cxt, false);
3812 :
3813 : /*
3814 : * Push any index-creation commands into the ALTER, so that they can be
3815 : * scheduled nicely by tablecmds.c. Note that tablecmds.c assumes that
3816 : * the IndexStmt attached to an AT_AddIndex or AT_AddIndexConstraint
3817 : * subcommand has already been through transformIndexStmt.
3818 : */
3819 35600 : foreach(l, cxt.alist)
3820 : {
3821 12070 : Node *istmt = (Node *) lfirst(l);
3822 :
3823 : /*
3824 : * We assume here that cxt.alist contains only IndexStmts generated
3825 : * from primary key constraints.
3826 : */
3827 12070 : if (IsA(istmt, IndexStmt))
3828 : {
3829 12070 : IndexStmt *idxstmt = (IndexStmt *) istmt;
3830 :
3831 12070 : idxstmt = transformIndexStmt(relid, idxstmt, queryString);
3832 12070 : newcmd = makeNode(AlterTableCmd);
3833 12070 : newcmd->subtype = OidIsValid(idxstmt->indexOid) ? AT_AddIndexConstraint : AT_AddIndex;
3834 12070 : newcmd->def = (Node *) idxstmt;
3835 12070 : newcmds = lappend(newcmds, newcmd);
3836 : }
3837 : else
3838 0 : elog(ERROR, "unexpected stmt type %d", (int) nodeTag(istmt));
3839 : }
3840 23530 : cxt.alist = NIL;
3841 :
3842 : /* Append any CHECK, NOT NULL or FK constraints to the commands list */
3843 48082 : foreach_node(Constraint, def, cxt.ckconstraints)
3844 : {
3845 1022 : newcmd = makeNode(AlterTableCmd);
3846 1022 : newcmd->subtype = AT_AddConstraint;
3847 1022 : newcmd->def = (Node *) def;
3848 1022 : newcmds = lappend(newcmds, newcmd);
3849 : }
3850 56226 : foreach_node(Constraint, def, cxt.nnconstraints)
3851 : {
3852 9166 : newcmd = makeNode(AlterTableCmd);
3853 9166 : newcmd->subtype = AT_AddConstraint;
3854 9166 : newcmd->def = (Node *) def;
3855 9166 : newcmds = lappend(newcmds, newcmd);
3856 : }
3857 49720 : foreach_node(Constraint, def, cxt.fkconstraints)
3858 : {
3859 2660 : newcmd = makeNode(AlterTableCmd);
3860 2660 : newcmd->subtype = AT_AddConstraint;
3861 2660 : newcmd->def = (Node *) def;
3862 2660 : newcmds = lappend(newcmds, newcmd);
3863 : }
3864 :
3865 : /* Close rel */
3866 23530 : relation_close(rel, NoLock);
3867 :
3868 : /*
3869 : * Output results.
3870 : */
3871 23530 : stmt->cmds = newcmds;
3872 :
3873 23530 : *beforeStmts = cxt.blist;
3874 23530 : *afterStmts = list_concat(cxt.alist, save_alist);
3875 :
3876 23530 : return stmt;
3877 : }
3878 :
3879 :
3880 : /*
3881 : * Preprocess a list of column constraint clauses
3882 : * to attach constraint attributes to their primary constraint nodes
3883 : * and detect inconsistent/misplaced constraint attributes.
3884 : *
3885 : * NOTE: currently, attributes are only supported for FOREIGN KEY, UNIQUE,
3886 : * EXCLUSION, and PRIMARY KEY constraints, but someday they ought to be
3887 : * supported for other constraint types.
3888 : */
3889 : static void
3890 68040 : transformConstraintAttrs(CreateStmtContext *cxt, List *constraintList)
3891 : {
3892 68040 : Constraint *lastprimarycon = NULL;
3893 68040 : bool saw_deferrability = false;
3894 68040 : bool saw_initially = false;
3895 68040 : bool saw_enforced = false;
3896 : ListCell *clist;
3897 :
3898 : #define SUPPORTS_ATTRS(node) \
3899 : ((node) != NULL && \
3900 : ((node)->contype == CONSTR_PRIMARY || \
3901 : (node)->contype == CONSTR_UNIQUE || \
3902 : (node)->contype == CONSTR_EXCLUSION || \
3903 : (node)->contype == CONSTR_FOREIGN))
3904 :
3905 87060 : foreach(clist, constraintList)
3906 : {
3907 19044 : Constraint *con = (Constraint *) lfirst(clist);
3908 :
3909 19044 : if (!IsA(con, Constraint))
3910 0 : elog(ERROR, "unrecognized node type: %d",
3911 : (int) nodeTag(con));
3912 19044 : switch (con->contype)
3913 : {
3914 94 : case CONSTR_ATTR_DEFERRABLE:
3915 94 : if (!SUPPORTS_ATTRS(lastprimarycon))
3916 0 : ereport(ERROR,
3917 : (errcode(ERRCODE_SYNTAX_ERROR),
3918 : errmsg("misplaced DEFERRABLE clause"),
3919 : parser_errposition(cxt->pstate, con->location)));
3920 94 : if (saw_deferrability)
3921 0 : ereport(ERROR,
3922 : (errcode(ERRCODE_SYNTAX_ERROR),
3923 : errmsg("multiple DEFERRABLE/NOT DEFERRABLE clauses not allowed"),
3924 : parser_errposition(cxt->pstate, con->location)));
3925 94 : saw_deferrability = true;
3926 94 : lastprimarycon->deferrable = true;
3927 94 : break;
3928 :
3929 0 : case CONSTR_ATTR_NOT_DEFERRABLE:
3930 0 : if (!SUPPORTS_ATTRS(lastprimarycon))
3931 0 : ereport(ERROR,
3932 : (errcode(ERRCODE_SYNTAX_ERROR),
3933 : errmsg("misplaced NOT DEFERRABLE clause"),
3934 : parser_errposition(cxt->pstate, con->location)));
3935 0 : if (saw_deferrability)
3936 0 : ereport(ERROR,
3937 : (errcode(ERRCODE_SYNTAX_ERROR),
3938 : errmsg("multiple DEFERRABLE/NOT DEFERRABLE clauses not allowed"),
3939 : parser_errposition(cxt->pstate, con->location)));
3940 0 : saw_deferrability = true;
3941 0 : lastprimarycon->deferrable = false;
3942 0 : if (saw_initially &&
3943 0 : lastprimarycon->initdeferred)
3944 0 : ereport(ERROR,
3945 : (errcode(ERRCODE_SYNTAX_ERROR),
3946 : errmsg("constraint declared INITIALLY DEFERRED must be DEFERRABLE"),
3947 : parser_errposition(cxt->pstate, con->location)));
3948 0 : break;
3949 :
3950 76 : case CONSTR_ATTR_DEFERRED:
3951 76 : if (!SUPPORTS_ATTRS(lastprimarycon))
3952 0 : ereport(ERROR,
3953 : (errcode(ERRCODE_SYNTAX_ERROR),
3954 : errmsg("misplaced INITIALLY DEFERRED clause"),
3955 : parser_errposition(cxt->pstate, con->location)));
3956 76 : if (saw_initially)
3957 0 : ereport(ERROR,
3958 : (errcode(ERRCODE_SYNTAX_ERROR),
3959 : errmsg("multiple INITIALLY IMMEDIATE/DEFERRED clauses not allowed"),
3960 : parser_errposition(cxt->pstate, con->location)));
3961 76 : saw_initially = true;
3962 76 : lastprimarycon->initdeferred = true;
3963 :
3964 : /*
3965 : * If only INITIALLY DEFERRED appears, assume DEFERRABLE
3966 : */
3967 76 : if (!saw_deferrability)
3968 26 : lastprimarycon->deferrable = true;
3969 50 : else if (!lastprimarycon->deferrable)
3970 0 : ereport(ERROR,
3971 : (errcode(ERRCODE_SYNTAX_ERROR),
3972 : errmsg("constraint declared INITIALLY DEFERRED must be DEFERRABLE"),
3973 : parser_errposition(cxt->pstate, con->location)));
3974 76 : break;
3975 :
3976 6 : case CONSTR_ATTR_IMMEDIATE:
3977 6 : if (!SUPPORTS_ATTRS(lastprimarycon))
3978 0 : ereport(ERROR,
3979 : (errcode(ERRCODE_SYNTAX_ERROR),
3980 : errmsg("misplaced INITIALLY IMMEDIATE clause"),
3981 : parser_errposition(cxt->pstate, con->location)));
3982 6 : if (saw_initially)
3983 0 : ereport(ERROR,
3984 : (errcode(ERRCODE_SYNTAX_ERROR),
3985 : errmsg("multiple INITIALLY IMMEDIATE/DEFERRED clauses not allowed"),
3986 : parser_errposition(cxt->pstate, con->location)));
3987 6 : saw_initially = true;
3988 6 : lastprimarycon->initdeferred = false;
3989 6 : break;
3990 :
3991 36 : case CONSTR_ATTR_ENFORCED:
3992 36 : if (lastprimarycon == NULL ||
3993 36 : (lastprimarycon->contype != CONSTR_CHECK &&
3994 12 : lastprimarycon->contype != CONSTR_FOREIGN))
3995 6 : ereport(ERROR,
3996 : (errcode(ERRCODE_SYNTAX_ERROR),
3997 : errmsg("misplaced ENFORCED clause"),
3998 : parser_errposition(cxt->pstate, con->location)));
3999 30 : if (saw_enforced)
4000 6 : ereport(ERROR,
4001 : (errcode(ERRCODE_SYNTAX_ERROR),
4002 : errmsg("multiple ENFORCED/NOT ENFORCED clauses not allowed"),
4003 : parser_errposition(cxt->pstate, con->location)));
4004 24 : saw_enforced = true;
4005 24 : lastprimarycon->is_enforced = true;
4006 24 : break;
4007 :
4008 60 : case CONSTR_ATTR_NOT_ENFORCED:
4009 60 : if (lastprimarycon == NULL ||
4010 60 : (lastprimarycon->contype != CONSTR_CHECK &&
4011 18 : lastprimarycon->contype != CONSTR_FOREIGN))
4012 6 : ereport(ERROR,
4013 : (errcode(ERRCODE_SYNTAX_ERROR),
4014 : errmsg("misplaced NOT ENFORCED clause"),
4015 : parser_errposition(cxt->pstate, con->location)));
4016 54 : if (saw_enforced)
4017 6 : ereport(ERROR,
4018 : (errcode(ERRCODE_SYNTAX_ERROR),
4019 : errmsg("multiple ENFORCED/NOT ENFORCED clauses not allowed"),
4020 : parser_errposition(cxt->pstate, con->location)));
4021 48 : saw_enforced = true;
4022 48 : lastprimarycon->is_enforced = false;
4023 :
4024 : /* A NOT ENFORCED constraint must be marked as invalid. */
4025 48 : lastprimarycon->skip_validation = true;
4026 48 : lastprimarycon->initially_valid = false;
4027 48 : break;
4028 :
4029 18772 : default:
4030 : /* Otherwise it's not an attribute */
4031 18772 : lastprimarycon = con;
4032 : /* reset flags for new primary node */
4033 18772 : saw_deferrability = false;
4034 18772 : saw_initially = false;
4035 18772 : saw_enforced = false;
4036 18772 : break;
4037 : }
4038 : }
4039 68016 : }
4040 :
4041 : /*
4042 : * Special handling of type definition for a column
4043 : */
4044 : static void
4045 67722 : transformColumnType(CreateStmtContext *cxt, ColumnDef *column)
4046 : {
4047 : /*
4048 : * All we really need to do here is verify that the type is valid,
4049 : * including any collation spec that might be present.
4050 : */
4051 67722 : Type ctype = typenameType(cxt->pstate, column->typeName, NULL);
4052 :
4053 67708 : if (column->collClause)
4054 : {
4055 520 : Form_pg_type typtup = (Form_pg_type) GETSTRUCT(ctype);
4056 :
4057 520 : LookupCollation(cxt->pstate,
4058 520 : column->collClause->collname,
4059 520 : column->collClause->location);
4060 : /* Complain if COLLATE is applied to an uncollatable type */
4061 508 : if (!OidIsValid(typtup->typcollation))
4062 12 : ereport(ERROR,
4063 : (errcode(ERRCODE_DATATYPE_MISMATCH),
4064 : errmsg("collations are not supported by type %s",
4065 : format_type_be(typtup->oid)),
4066 : parser_errposition(cxt->pstate,
4067 : column->collClause->location)));
4068 : }
4069 :
4070 67684 : ReleaseSysCache(ctype);
4071 67684 : }
4072 :
4073 :
4074 : /*
4075 : * transformCreateSchemaStmtElements -
4076 : * analyzes the elements of a CREATE SCHEMA statement
4077 : *
4078 : * Split the schema element list from a CREATE SCHEMA statement into
4079 : * individual commands and place them in the result list in an order
4080 : * such that there are no forward references (e.g. GRANT to a table
4081 : * created later in the list). Note that the logic we use for determining
4082 : * forward references is presently quite incomplete.
4083 : *
4084 : * "schemaName" is the name of the schema that will be used for the creation
4085 : * of the objects listed, that may be compiled from the schema name defined
4086 : * in the statement or a role specification.
4087 : *
4088 : * SQL also allows constraints to make forward references, so thumb through
4089 : * the table columns and move forward references to a posterior alter-table
4090 : * command.
4091 : *
4092 : * The result is a list of parse nodes that still need to be analyzed ---
4093 : * but we can't analyze the later commands until we've executed the earlier
4094 : * ones, because of possible inter-object references.
4095 : *
4096 : * Note: this breaks the rules a little bit by modifying schema-name fields
4097 : * within passed-in structs. However, the transformation would be the same
4098 : * if done over, so it should be all right to scribble on the input to this
4099 : * extent.
4100 : */
4101 : List *
4102 1028 : transformCreateSchemaStmtElements(List *schemaElts, const char *schemaName)
4103 : {
4104 : CreateSchemaStmtContext cxt;
4105 : List *result;
4106 : ListCell *elements;
4107 :
4108 1028 : cxt.schemaname = schemaName;
4109 1028 : cxt.sequences = NIL;
4110 1028 : cxt.tables = NIL;
4111 1028 : cxt.views = NIL;
4112 1028 : cxt.indexes = NIL;
4113 1028 : cxt.triggers = NIL;
4114 1028 : cxt.grants = NIL;
4115 :
4116 : /*
4117 : * Run through each schema element in the schema element list. Separate
4118 : * statements by type, and do preliminary analysis.
4119 : */
4120 1496 : foreach(elements, schemaElts)
4121 : {
4122 558 : Node *element = lfirst(elements);
4123 :
4124 558 : switch (nodeTag(element))
4125 : {
4126 18 : case T_CreateSeqStmt:
4127 : {
4128 18 : CreateSeqStmt *elp = (CreateSeqStmt *) element;
4129 :
4130 18 : setSchemaName(cxt.schemaname, &elp->sequence->schemaname);
4131 0 : cxt.sequences = lappend(cxt.sequences, element);
4132 : }
4133 0 : break;
4134 :
4135 446 : case T_CreateStmt:
4136 : {
4137 446 : CreateStmt *elp = (CreateStmt *) element;
4138 :
4139 446 : setSchemaName(cxt.schemaname, &elp->relation->schemaname);
4140 :
4141 : /*
4142 : * XXX todo: deal with constraints
4143 : */
4144 428 : cxt.tables = lappend(cxt.tables, element);
4145 : }
4146 428 : break;
4147 :
4148 44 : case T_ViewStmt:
4149 : {
4150 44 : ViewStmt *elp = (ViewStmt *) element;
4151 :
4152 44 : setSchemaName(cxt.schemaname, &elp->view->schemaname);
4153 :
4154 : /*
4155 : * XXX todo: deal with references between views
4156 : */
4157 26 : cxt.views = lappend(cxt.views, element);
4158 : }
4159 26 : break;
4160 :
4161 32 : case T_IndexStmt:
4162 : {
4163 32 : IndexStmt *elp = (IndexStmt *) element;
4164 :
4165 32 : setSchemaName(cxt.schemaname, &elp->relation->schemaname);
4166 14 : cxt.indexes = lappend(cxt.indexes, element);
4167 : }
4168 14 : break;
4169 :
4170 18 : case T_CreateTrigStmt:
4171 : {
4172 18 : CreateTrigStmt *elp = (CreateTrigStmt *) element;
4173 :
4174 18 : setSchemaName(cxt.schemaname, &elp->relation->schemaname);
4175 0 : cxt.triggers = lappend(cxt.triggers, element);
4176 : }
4177 0 : break;
4178 :
4179 0 : case T_GrantStmt:
4180 0 : cxt.grants = lappend(cxt.grants, element);
4181 0 : break;
4182 :
4183 0 : default:
4184 0 : elog(ERROR, "unrecognized node type: %d",
4185 : (int) nodeTag(element));
4186 : }
4187 : }
4188 :
4189 938 : result = NIL;
4190 938 : result = list_concat(result, cxt.sequences);
4191 938 : result = list_concat(result, cxt.tables);
4192 938 : result = list_concat(result, cxt.views);
4193 938 : result = list_concat(result, cxt.indexes);
4194 938 : result = list_concat(result, cxt.triggers);
4195 938 : result = list_concat(result, cxt.grants);
4196 :
4197 938 : return result;
4198 : }
4199 :
4200 : /*
4201 : * setSchemaName
4202 : * Set or check schema name in an element of a CREATE SCHEMA command
4203 : */
4204 : static void
4205 558 : setSchemaName(const char *context_schema, char **stmt_schema_name)
4206 : {
4207 558 : if (*stmt_schema_name == NULL)
4208 450 : *stmt_schema_name = unconstify(char *, context_schema);
4209 108 : else if (strcmp(context_schema, *stmt_schema_name) != 0)
4210 90 : ereport(ERROR,
4211 : (errcode(ERRCODE_INVALID_SCHEMA_DEFINITION),
4212 : errmsg("CREATE specifies a schema (%s) "
4213 : "different from the one being created (%s)",
4214 : *stmt_schema_name, context_schema)));
4215 468 : }
4216 :
4217 : /*
4218 : * transformPartitionCmd
4219 : * Analyze the ATTACH/DETACH PARTITION command
4220 : *
4221 : * In case of the ATTACH PARTITION command, cxt->partbound is set to the
4222 : * transformed value of cmd->bound.
4223 : */
4224 : static void
4225 3376 : transformPartitionCmd(CreateStmtContext *cxt, PartitionCmd *cmd)
4226 : {
4227 3376 : Relation parentRel = cxt->rel;
4228 :
4229 3376 : switch (parentRel->rd_rel->relkind)
4230 : {
4231 2990 : case RELKIND_PARTITIONED_TABLE:
4232 : /* transform the partition bound, if any */
4233 : Assert(RelationGetPartitionKey(parentRel) != NULL);
4234 2990 : if (cmd->bound != NULL)
4235 2412 : cxt->partbound = transformPartitionBound(cxt->pstate, parentRel,
4236 : cmd->bound);
4237 2972 : break;
4238 386 : case RELKIND_PARTITIONED_INDEX:
4239 :
4240 : /*
4241 : * A partitioned index cannot have a partition bound set. ALTER
4242 : * INDEX prevents that with its grammar, but not ALTER TABLE.
4243 : */
4244 386 : if (cmd->bound != NULL)
4245 6 : ereport(ERROR,
4246 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
4247 : errmsg("\"%s\" is not a partitioned table",
4248 : RelationGetRelationName(parentRel))));
4249 380 : break;
4250 0 : case RELKIND_RELATION:
4251 : /* the table must be partitioned */
4252 0 : ereport(ERROR,
4253 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
4254 : errmsg("table \"%s\" is not partitioned",
4255 : RelationGetRelationName(parentRel))));
4256 : break;
4257 0 : case RELKIND_INDEX:
4258 : /* the index must be partitioned */
4259 0 : ereport(ERROR,
4260 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
4261 : errmsg("index \"%s\" is not partitioned",
4262 : RelationGetRelationName(parentRel))));
4263 : break;
4264 0 : default:
4265 : /* parser shouldn't let this case through */
4266 0 : elog(ERROR, "\"%s\" is not a partitioned table or index",
4267 : RelationGetRelationName(parentRel));
4268 : break;
4269 : }
4270 3352 : }
4271 :
4272 : /*
4273 : * transformPartitionBound
4274 : *
4275 : * Transform a partition bound specification
4276 : */
4277 : PartitionBoundSpec *
4278 10386 : transformPartitionBound(ParseState *pstate, Relation parent,
4279 : PartitionBoundSpec *spec)
4280 : {
4281 : PartitionBoundSpec *result_spec;
4282 10386 : PartitionKey key = RelationGetPartitionKey(parent);
4283 10386 : char strategy = get_partition_strategy(key);
4284 10386 : int partnatts = get_partition_natts(key);
4285 10386 : List *partexprs = get_partition_exprs(key);
4286 :
4287 : /* Avoid scribbling on input */
4288 10386 : result_spec = copyObject(spec);
4289 :
4290 10386 : if (spec->is_default)
4291 : {
4292 : /*
4293 : * Hash partitioning does not support a default partition; there's no
4294 : * use case for it (since the set of partitions to create is perfectly
4295 : * defined), and if users do get into it accidentally, it's hard to
4296 : * back out from it afterwards.
4297 : */
4298 574 : if (strategy == PARTITION_STRATEGY_HASH)
4299 6 : ereport(ERROR,
4300 : (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4301 : errmsg("a hash-partitioned table may not have a default partition")));
4302 :
4303 : /*
4304 : * In case of the default partition, parser had no way to identify the
4305 : * partition strategy. Assign the parent's strategy to the default
4306 : * partition bound spec.
4307 : */
4308 568 : result_spec->strategy = strategy;
4309 :
4310 568 : return result_spec;
4311 : }
4312 :
4313 9812 : if (strategy == PARTITION_STRATEGY_HASH)
4314 : {
4315 714 : if (spec->strategy != PARTITION_STRATEGY_HASH)
4316 12 : ereport(ERROR,
4317 : (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4318 : errmsg("invalid bound specification for a hash partition"),
4319 : parser_errposition(pstate, exprLocation((Node *) spec))));
4320 :
4321 702 : if (spec->modulus <= 0)
4322 12 : ereport(ERROR,
4323 : (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4324 : errmsg("modulus for hash partition must be an integer value greater than zero")));
4325 :
4326 : Assert(spec->remainder >= 0);
4327 :
4328 690 : if (spec->remainder >= spec->modulus)
4329 12 : ereport(ERROR,
4330 : (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4331 : errmsg("remainder for hash partition must be less than modulus")));
4332 : }
4333 9098 : else if (strategy == PARTITION_STRATEGY_LIST)
4334 : {
4335 : ListCell *cell;
4336 : char *colname;
4337 : Oid coltype;
4338 : int32 coltypmod;
4339 : Oid partcollation;
4340 :
4341 4938 : if (spec->strategy != PARTITION_STRATEGY_LIST)
4342 18 : ereport(ERROR,
4343 : (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4344 : errmsg("invalid bound specification for a list partition"),
4345 : parser_errposition(pstate, exprLocation((Node *) spec))));
4346 :
4347 : /* Get the only column's name in case we need to output an error */
4348 4920 : if (key->partattrs[0] != 0)
4349 4788 : colname = get_attname(RelationGetRelid(parent),
4350 4788 : key->partattrs[0], false);
4351 : else
4352 132 : colname = deparse_expression((Node *) linitial(partexprs),
4353 132 : deparse_context_for(RelationGetRelationName(parent),
4354 : RelationGetRelid(parent)),
4355 : false, false);
4356 : /* Need its type data too */
4357 4920 : coltype = get_partition_col_typid(key, 0);
4358 4920 : coltypmod = get_partition_col_typmod(key, 0);
4359 4920 : partcollation = get_partition_col_collation(key, 0);
4360 :
4361 4920 : result_spec->listdatums = NIL;
4362 12128 : foreach(cell, spec->listdatums)
4363 : {
4364 7268 : Node *expr = lfirst(cell);
4365 : Const *value;
4366 : ListCell *cell2;
4367 : bool duplicate;
4368 :
4369 7268 : value = transformPartitionBoundValue(pstate, expr,
4370 : colname, coltype, coltypmod,
4371 : partcollation);
4372 :
4373 : /* Don't add to the result if the value is a duplicate */
4374 7208 : duplicate = false;
4375 12428 : foreach(cell2, result_spec->listdatums)
4376 : {
4377 5220 : Const *value2 = lfirst_node(Const, cell2);
4378 :
4379 5220 : if (equal(value, value2))
4380 : {
4381 0 : duplicate = true;
4382 0 : break;
4383 : }
4384 : }
4385 7208 : if (duplicate)
4386 0 : continue;
4387 :
4388 7208 : result_spec->listdatums = lappend(result_spec->listdatums,
4389 : value);
4390 : }
4391 : }
4392 4160 : else if (strategy == PARTITION_STRATEGY_RANGE)
4393 : {
4394 4160 : if (spec->strategy != PARTITION_STRATEGY_RANGE)
4395 18 : ereport(ERROR,
4396 : (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4397 : errmsg("invalid bound specification for a range partition"),
4398 : parser_errposition(pstate, exprLocation((Node *) spec))));
4399 :
4400 4142 : if (list_length(spec->lowerdatums) != partnatts)
4401 6 : ereport(ERROR,
4402 : (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4403 : errmsg("FROM must specify exactly one value per partitioning column")));
4404 4136 : if (list_length(spec->upperdatums) != partnatts)
4405 6 : ereport(ERROR,
4406 : (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4407 : errmsg("TO must specify exactly one value per partitioning column")));
4408 :
4409 : /*
4410 : * Convert raw parse nodes into PartitionRangeDatum nodes and perform
4411 : * any necessary validation.
4412 : */
4413 4064 : result_spec->lowerdatums =
4414 4130 : transformPartitionRangeBounds(pstate, spec->lowerdatums,
4415 : parent);
4416 4058 : result_spec->upperdatums =
4417 4064 : transformPartitionRangeBounds(pstate, spec->upperdatums,
4418 : parent);
4419 : }
4420 : else
4421 0 : elog(ERROR, "unexpected partition strategy: %d", (int) strategy);
4422 :
4423 9596 : return result_spec;
4424 : }
4425 :
4426 : /*
4427 : * transformPartitionRangeBounds
4428 : * This converts the expressions for range partition bounds from the raw
4429 : * grammar representation to PartitionRangeDatum structs
4430 : */
4431 : static List *
4432 8194 : transformPartitionRangeBounds(ParseState *pstate, List *blist,
4433 : Relation parent)
4434 : {
4435 8194 : List *result = NIL;
4436 8194 : PartitionKey key = RelationGetPartitionKey(parent);
4437 8194 : List *partexprs = get_partition_exprs(key);
4438 : ListCell *lc;
4439 : int i,
4440 : j;
4441 :
4442 8194 : i = j = 0;
4443 18346 : foreach(lc, blist)
4444 : {
4445 10206 : Node *expr = lfirst(lc);
4446 10206 : PartitionRangeDatum *prd = NULL;
4447 :
4448 : /*
4449 : * Infinite range bounds -- "minvalue" and "maxvalue" -- get passed in
4450 : * as ColumnRefs.
4451 : */
4452 10206 : if (IsA(expr, ColumnRef))
4453 : {
4454 752 : ColumnRef *cref = (ColumnRef *) expr;
4455 752 : char *cname = NULL;
4456 :
4457 : /*
4458 : * There should be a single field named either "minvalue" or
4459 : * "maxvalue".
4460 : */
4461 752 : if (list_length(cref->fields) == 1 &&
4462 746 : IsA(linitial(cref->fields), String))
4463 746 : cname = strVal(linitial(cref->fields));
4464 :
4465 752 : if (cname == NULL)
4466 : {
4467 : /*
4468 : * ColumnRef is not in the desired single-field-name form. For
4469 : * consistency between all partition strategies, let the
4470 : * expression transformation report any errors rather than
4471 : * doing it ourselves.
4472 : */
4473 : }
4474 746 : else if (strcmp("minvalue", cname) == 0)
4475 : {
4476 380 : prd = makeNode(PartitionRangeDatum);
4477 380 : prd->kind = PARTITION_RANGE_DATUM_MINVALUE;
4478 380 : prd->value = NULL;
4479 : }
4480 366 : else if (strcmp("maxvalue", cname) == 0)
4481 : {
4482 354 : prd = makeNode(PartitionRangeDatum);
4483 354 : prd->kind = PARTITION_RANGE_DATUM_MAXVALUE;
4484 354 : prd->value = NULL;
4485 : }
4486 : }
4487 :
4488 10206 : if (prd == NULL)
4489 : {
4490 : char *colname;
4491 : Oid coltype;
4492 : int32 coltypmod;
4493 : Oid partcollation;
4494 : Const *value;
4495 :
4496 : /* Get the column's name in case we need to output an error */
4497 9472 : if (key->partattrs[i] != 0)
4498 8654 : colname = get_attname(RelationGetRelid(parent),
4499 8654 : key->partattrs[i], false);
4500 : else
4501 : {
4502 818 : colname = deparse_expression((Node *) list_nth(partexprs, j),
4503 818 : deparse_context_for(RelationGetRelationName(parent),
4504 : RelationGetRelid(parent)),
4505 : false, false);
4506 818 : ++j;
4507 : }
4508 :
4509 : /* Need its type data too */
4510 9472 : coltype = get_partition_col_typid(key, i);
4511 9472 : coltypmod = get_partition_col_typmod(key, i);
4512 9472 : partcollation = get_partition_col_collation(key, i);
4513 :
4514 9472 : value = transformPartitionBoundValue(pstate, expr,
4515 : colname,
4516 : coltype, coltypmod,
4517 : partcollation);
4518 9424 : if (value->constisnull)
4519 6 : ereport(ERROR,
4520 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
4521 : errmsg("cannot specify NULL in range bound")));
4522 9418 : prd = makeNode(PartitionRangeDatum);
4523 9418 : prd->kind = PARTITION_RANGE_DATUM_VALUE;
4524 9418 : prd->value = (Node *) value;
4525 9418 : ++i;
4526 : }
4527 :
4528 10152 : prd->location = exprLocation(expr);
4529 :
4530 10152 : result = lappend(result, prd);
4531 : }
4532 :
4533 : /*
4534 : * Once we see MINVALUE or MAXVALUE for one column, the remaining columns
4535 : * must be the same.
4536 : */
4537 8140 : validateInfiniteBounds(pstate, result);
4538 :
4539 8122 : return result;
4540 : }
4541 :
4542 : /*
4543 : * validateInfiniteBounds
4544 : *
4545 : * Check that a MAXVALUE or MINVALUE specification in a partition bound is
4546 : * followed only by more of the same.
4547 : */
4548 : static void
4549 8140 : validateInfiniteBounds(ParseState *pstate, List *blist)
4550 : {
4551 : ListCell *lc;
4552 8140 : PartitionRangeDatumKind kind = PARTITION_RANGE_DATUM_VALUE;
4553 :
4554 18268 : foreach(lc, blist)
4555 : {
4556 10146 : PartitionRangeDatum *prd = lfirst_node(PartitionRangeDatum, lc);
4557 :
4558 10146 : if (kind == prd->kind)
4559 9604 : continue;
4560 :
4561 542 : switch (kind)
4562 : {
4563 524 : case PARTITION_RANGE_DATUM_VALUE:
4564 524 : kind = prd->kind;
4565 524 : break;
4566 :
4567 6 : case PARTITION_RANGE_DATUM_MAXVALUE:
4568 6 : ereport(ERROR,
4569 : (errcode(ERRCODE_DATATYPE_MISMATCH),
4570 : errmsg("every bound following MAXVALUE must also be MAXVALUE"),
4571 : parser_errposition(pstate, exprLocation((Node *) prd))));
4572 : break;
4573 :
4574 12 : case PARTITION_RANGE_DATUM_MINVALUE:
4575 12 : ereport(ERROR,
4576 : (errcode(ERRCODE_DATATYPE_MISMATCH),
4577 : errmsg("every bound following MINVALUE must also be MINVALUE"),
4578 : parser_errposition(pstate, exprLocation((Node *) prd))));
4579 : break;
4580 : }
4581 : }
4582 8122 : }
4583 :
4584 : /*
4585 : * Transform one entry in a partition bound spec, producing a constant.
4586 : */
4587 : static Const *
4588 16740 : transformPartitionBoundValue(ParseState *pstate, Node *val,
4589 : const char *colName, Oid colType, int32 colTypmod,
4590 : Oid partCollation)
4591 : {
4592 : Node *value;
4593 :
4594 : /* Transform raw parsetree */
4595 16740 : value = transformExpr(pstate, val, EXPR_KIND_PARTITION_BOUND);
4596 :
4597 : /*
4598 : * transformExpr() should have already rejected column references,
4599 : * subqueries, aggregates, window functions, and SRFs, based on the
4600 : * EXPR_KIND_ of a partition bound expression.
4601 : */
4602 : Assert(!contain_var_clause(value));
4603 :
4604 : /*
4605 : * Coerce to the correct type. This might cause an explicit coercion step
4606 : * to be added on top of the expression, which must be evaluated before
4607 : * returning the result to the caller.
4608 : */
4609 16638 : value = coerce_to_target_type(pstate,
4610 : value, exprType(value),
4611 : colType,
4612 : colTypmod,
4613 : COERCION_ASSIGNMENT,
4614 : COERCE_IMPLICIT_CAST,
4615 : -1);
4616 :
4617 16638 : if (value == NULL)
4618 6 : ereport(ERROR,
4619 : (errcode(ERRCODE_DATATYPE_MISMATCH),
4620 : errmsg("specified value cannot be cast to type %s for column \"%s\"",
4621 : format_type_be(colType), colName),
4622 : parser_errposition(pstate, exprLocation(val))));
4623 :
4624 : /*
4625 : * Evaluate the expression, if needed, assigning the partition key's data
4626 : * type and collation to the resulting Const node.
4627 : */
4628 16632 : if (!IsA(value, Const))
4629 : {
4630 546 : assign_expr_collations(pstate, value);
4631 546 : value = (Node *) expression_planner((Expr *) value);
4632 546 : value = (Node *) evaluate_expr((Expr *) value, colType, colTypmod,
4633 : partCollation);
4634 546 : if (!IsA(value, Const))
4635 0 : elog(ERROR, "could not evaluate partition bound expression");
4636 : }
4637 : else
4638 : {
4639 : /*
4640 : * If the expression is already a Const, as is often the case, we can
4641 : * skip the rather expensive steps above. But we still have to insert
4642 : * the right collation, since coerce_to_target_type doesn't handle
4643 : * that.
4644 : */
4645 16086 : ((Const *) value)->constcollid = partCollation;
4646 : }
4647 :
4648 : /*
4649 : * Attach original expression's parse location to the Const, so that
4650 : * that's what will be reported for any later errors related to this
4651 : * partition bound.
4652 : */
4653 16632 : ((Const *) value)->location = exprLocation(val);
4654 :
4655 16632 : return (Const *) value;
4656 : }
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