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parse_utilcmd.c
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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) 1996-2026, 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/attmap.h"
27#include "access/htup_details.h"
28#include "access/relation.h"
29#include "access/reloptions.h"
30#include "access/table.h"
31#include "access/toast_compression.h"
32#include "catalog/dependency.h"
33#include "catalog/heap.h"
34#include "catalog/index.h"
35#include "catalog/namespace.h"
36#include "catalog/partition.h"
37#include "catalog/pg_am.h"
38#include "catalog/pg_collation.h"
39#include "catalog/pg_constraint.h"
40#include "catalog/pg_opclass.h"
41#include "catalog/pg_operator.h"
42#include "catalog/pg_statistic_ext.h"
43#include "catalog/pg_type.h"
44#include "commands/comment.h"
45#include "commands/defrem.h"
46#include "commands/sequence.h"
47#include "commands/tablecmds.h"
48#include "commands/tablespace.h"
49#include "miscadmin.h"
50#include "nodes/makefuncs.h"
51#include "nodes/nodeFuncs.h"
52#include "optimizer/optimizer.h"
53#include "parser/analyze.h"
54#include "parser/parse_clause.h"
55#include "parser/parse_coerce.h"
56#include "parser/parse_collate.h"
57#include "parser/parse_expr.h"
58#include "parser/parse_relation.h"
59#include "parser/parse_target.h"
60#include "parser/parse_type.h"
61#include "parser/parse_utilcmd.h"
62#include "parser/parser.h"
63#include "partitioning/partbounds.h"
64#include "partitioning/partdesc.h"
65#include "rewrite/rewriteManip.h"
66#include "utils/acl.h"
67#include "utils/builtins.h"
68#include "utils/lsyscache.h"
69#include "utils/partcache.h"
70#include "utils/rel.h"
71#include "utils/ruleutils.h"
72#include "utils/syscache.h"
73#include "utils/typcache.h"
74
75
76/* State shared by transformCreateStmt and its subroutines */
77typedef struct
78{
79 ParseState *pstate; /* overall parser state */
80 const char *stmtType; /* "CREATE [FOREIGN] TABLE" or "ALTER TABLE" */
81 RangeVar *relation; /* relation to create */
82 Relation rel; /* opened/locked rel, if ALTER */
83 List *inhRelations; /* relations to inherit from */
84 bool isforeign; /* true if CREATE/ALTER FOREIGN TABLE */
85 bool isalter; /* true if altering existing table */
86 List *columns; /* ColumnDef items */
87 List *ckconstraints; /* CHECK constraints */
88 List *nnconstraints; /* NOT NULL constraints */
89 List *fkconstraints; /* FOREIGN KEY constraints */
90 List *ixconstraints; /* index-creating constraints */
91 List *likeclauses; /* LIKE clauses that need post-processing */
92 List *blist; /* "before list" of things to do before
93 * creating the table */
94 List *alist; /* "after list" of things to do after creating
95 * the table */
96 IndexStmt *pkey; /* PRIMARY KEY index, if any */
97 bool ispartitioned; /* true if table is partitioned */
98 PartitionBoundSpec *partbound; /* transformed FOR VALUES */
99 bool ofType; /* true if statement contains OF typename */
100} CreateStmtContext;
101
102
103static void transformColumnDefinition(CreateStmtContext *cxt,
104 ColumnDef *column);
105static void transformTableConstraint(CreateStmtContext *cxt,
106 Constraint *constraint);
107static void transformTableLikeClause(CreateStmtContext *cxt,
108 TableLikeClause *table_like_clause);
109static void transformOfType(CreateStmtContext *cxt,
110 TypeName *ofTypename);
111static CreateStatsStmt *generateClonedExtStatsStmt(RangeVar *heapRel,
112 Oid heapRelid,
113 Oid source_statsid,
114 const AttrMap *attmap);
115static List *get_collation(Oid collation, Oid actual_datatype);
116static List *get_opclass(Oid opclass, Oid actual_datatype);
117static void transformIndexConstraints(CreateStmtContext *cxt);
118static IndexStmt *transformIndexConstraint(Constraint *constraint,
119 CreateStmtContext *cxt);
120static void transformFKConstraints(CreateStmtContext *cxt,
121 bool skipValidation,
122 bool isAddConstraint);
123static void transformCheckConstraints(CreateStmtContext *cxt,
124 bool skipValidation);
125static void transformConstraintAttrs(ParseState *pstate,
126 List *constraintList);
127static void transformColumnType(CreateStmtContext *cxt, ColumnDef *column);
128static void checkSchemaNameRV(ParseState *pstate, const char *context_schema,
129 RangeVar *relation);
130static void checkSchemaNameList(const char *context_schema,
131 List *qualified_name);
132static CreateStmt *transformCreateSchemaCreateTable(ParseState *pstate,
133 CreateStmt *stmt,
134 List **fk_elements);
135static void transformPartitionCmd(CreateStmtContext *cxt, PartitionBoundSpec *bound);
136static List *transformPartitionRangeBounds(ParseState *pstate, List *blist,
137 Relation parent);
138static void validateInfiniteBounds(ParseState *pstate, List *blist);
139static Const *transformPartitionBoundValue(ParseState *pstate, Node *val,
140 const char *colName, Oid colType, int32 colTypmod,
141 Oid partCollation);
142
143
144/*
145 * transformCreateStmt -
146 * parse analysis for CREATE TABLE
147 *
148 * Returns a List of utility commands to be done in sequence. One of these
149 * will be the transformed CreateStmt, but there may be additional actions
150 * to be done before and after the actual DefineRelation() call.
151 * In addition to normal utility commands such as AlterTableStmt and
152 * IndexStmt, the result list may contain TableLikeClause(s), representing
153 * the need to perform additional parse analysis after DefineRelation().
154 *
155 * SQL allows constraints to be scattered all over, so thumb through
156 * the columns and collect all constraints into one place.
157 * If there are any implied indices (e.g. UNIQUE or PRIMARY KEY)
158 * then expand those into multiple IndexStmt blocks.
159 * - thomas 1997-12-02
160 */
161List *
162transformCreateStmt(CreateStmt *stmt, const char *queryString)
163{
164 ParseState *pstate;
165 CreateStmtContext cxt;
166 List *result;
167 List *save_alist;
168 ListCell *elements;
169 Oid namespaceid;
170 Oid existing_relid;
171 ParseCallbackState pcbstate;
172
173 /* Set up pstate */
174 pstate = make_parsestate(NULL);
175 pstate->p_sourcetext = queryString;
176
177 /*
178 * Look up the creation namespace. This also checks permissions on the
179 * target namespace, locks it against concurrent drops, checks for a
180 * preexisting relation in that namespace with the same name, and updates
181 * stmt->relation->relpersistence if the selected namespace is temporary.
182 */
183 setup_parser_errposition_callback(&pcbstate, pstate,
184 stmt->relation->location);
185 namespaceid =
186 RangeVarGetAndCheckCreationNamespace(stmt->relation, NoLock,
187 &existing_relid);
188 cancel_parser_errposition_callback(&pcbstate);
189
190 /*
191 * If the relation already exists and the user specified "IF NOT EXISTS",
192 * bail out with a NOTICE.
193 */
194 if (stmt->if_not_exists && OidIsValid(existing_relid))
195 {
196 /*
197 * If we are in an extension script, insist that the pre-existing
198 * object be a member of the extension, to avoid security risks.
199 */
200 ObjectAddress address;
201
202 ObjectAddressSet(address, RelationRelationId, existing_relid);
203 checkMembershipInCurrentExtension(&address);
204
205 /* OK to skip */
206 ereport(NOTICE,
207 (errcode(ERRCODE_DUPLICATE_TABLE),
208 errmsg("relation \"%s\" already exists, skipping",
209 stmt->relation->relname)));
210 return NIL;
211 }
212
213 /*
214 * If the target relation name isn't schema-qualified, make it so. This
215 * prevents some corner cases in which added-on rewritten commands might
216 * think they should apply to other relations that have the same name and
217 * are earlier in the search path. But a local temp table is effectively
218 * specified to be in pg_temp, so no need for anything extra in that case.
219 */
220 if (stmt->relation->schemaname == NULL
221 && stmt->relation->relpersistence != RELPERSISTENCE_TEMP)
222 stmt->relation->schemaname = get_namespace_name(namespaceid);
223
224 /* Set up CreateStmtContext */
225 cxt.pstate = pstate;
226 if (IsA(stmt, CreateForeignTableStmt))
227 {
228 cxt.stmtType = "CREATE FOREIGN TABLE";
229 cxt.isforeign = true;
230 }
231 else
232 {
233 cxt.stmtType = "CREATE TABLE";
234 cxt.isforeign = false;
235 }
236 cxt.relation = stmt->relation;
237 cxt.rel = NULL;
238 cxt.inhRelations = stmt->inhRelations;
239 cxt.isalter = false;
240 cxt.columns = NIL;
241 cxt.ckconstraints = NIL;
242 cxt.nnconstraints = NIL;
243 cxt.fkconstraints = NIL;
244 cxt.ixconstraints = NIL;
245 cxt.likeclauses = NIL;
246 cxt.blist = NIL;
247 cxt.alist = NIL;
248 cxt.pkey = NULL;
249 cxt.ispartitioned = stmt->partspec != NULL;
250 cxt.partbound = stmt->partbound;
251 cxt.ofType = (stmt->ofTypename != NULL);
252
253 Assert(!stmt->ofTypename || !stmt->inhRelations); /* grammar enforces */
254
255 if (stmt->ofTypename)
256 transformOfType(&cxt, stmt->ofTypename);
257
258 if (stmt->partspec)
259 {
260 if (stmt->inhRelations && !stmt->partbound)
261 ereport(ERROR,
262 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
263 errmsg("cannot create partitioned table as inheritance child")));
264 }
265
266 /*
267 * Run through each primary element in the table creation clause. Separate
268 * column defs from constraints, and do preliminary analysis.
269 */
270 foreach(elements, stmt->tableElts)
271 {
272 Node *element = lfirst(elements);
273
274 switch (nodeTag(element))
275 {
276 case T_ColumnDef:
277 transformColumnDefinition(&cxt, (ColumnDef *) element);
278 break;
279
280 case T_Constraint:
281 transformTableConstraint(&cxt, (Constraint *) element);
282 break;
283
284 case T_TableLikeClause:
285 transformTableLikeClause(&cxt, (TableLikeClause *) element);
286 break;
287
288 default:
289 elog(ERROR, "unrecognized node type: %d",
290 (int) nodeTag(element));
291 break;
292 }
293 }
294
295 /*
296 * Transfer anything we already have in cxt.alist into save_alist, to keep
297 * it separate from the output of transformIndexConstraints. (This may
298 * not be necessary anymore, but we'll keep doing it to preserve the
299 * historical order of execution of the alist commands.)
300 */
301 save_alist = cxt.alist;
302 cxt.alist = NIL;
303
304 Assert(stmt->constraints == NIL);
305
306 /*
307 * Before processing index constraints, which could include a primary key,
308 * we must scan all not-null constraints to propagate the is_not_null flag
309 * to each corresponding ColumnDef. This is necessary because table-level
310 * not-null constraints have not been marked in each ColumnDef, and the PK
311 * processing code needs to know whether one constraint has already been
312 * declared in order not to declare a redundant one.
313 */
314 foreach_node(Constraint, nn, cxt.nnconstraints)
315 {
316 char *colname = strVal(linitial(nn->keys));
317
318 foreach_node(ColumnDef, cd, cxt.columns)
319 {
320 /* not our column? */
321 if (strcmp(cd->colname, colname) != 0)
322 continue;
323 /* Already marked not-null? Nothing to do */
324 if (cd->is_not_null)
325 break;
326 /* Bingo, we're done for this constraint */
327 cd->is_not_null = true;
328 break;
329 }
330 }
331
332 /*
333 * Postprocess constraints that give rise to index definitions.
334 */
335 transformIndexConstraints(&cxt);
336
337 /*
338 * Re-consideration of LIKE clauses should happen after creation of
339 * indexes, but before creation of foreign keys. This order is critical
340 * because a LIKE clause may attempt to create a primary key. If there's
341 * also a pkey in the main CREATE TABLE list, creation of that will not
342 * check for a duplicate at runtime (since index_check_primary_key()
343 * expects that we rejected dups here). Creation of the LIKE-generated
344 * pkey behaves like ALTER TABLE ADD, so it will check, but obviously that
345 * only works if it happens second. On the other hand, we want to make
346 * pkeys before foreign key constraints, in case the user tries to make a
347 * self-referential FK.
348 */
349 cxt.alist = list_concat(cxt.alist, cxt.likeclauses);
350
351 /*
352 * Postprocess foreign-key constraints.
353 */
354 transformFKConstraints(&cxt, true, false);
355
356 /*
357 * Postprocess check constraints.
358 *
359 * For regular tables all constraints can be marked valid immediately,
360 * because the table is new therefore empty. Not so for foreign tables.
361 */
362 transformCheckConstraints(&cxt, !cxt.isforeign);
363
364 /*
365 * Output results.
366 */
367 stmt->tableElts = cxt.columns;
368 stmt->constraints = cxt.ckconstraints;
369 stmt->nnconstraints = cxt.nnconstraints;
370
371 result = lappend(cxt.blist, stmt);
372 result = list_concat(result, cxt.alist);
373 result = list_concat(result, save_alist);
374
375 return result;
376}
377
378/*
379 * generateSerialExtraStmts
380 * Generate CREATE SEQUENCE and ALTER SEQUENCE ... OWNED BY statements
381 * to create the sequence for a serial or identity column.
382 *
383 * This includes determining the name the sequence will have. The caller
384 * can ask to get back the name components by passing non-null pointers
385 * for snamespace_p and sname_p.
386 */
387static void
388generateSerialExtraStmts(CreateStmtContext *cxt, ColumnDef *column,
389 Oid seqtypid, List *seqoptions,
390 bool for_identity, bool col_exists,
391 char **snamespace_p, char **sname_p)
392{
393 ListCell *option;
394 DefElem *nameEl = NULL;
395 DefElem *loggedEl = NULL;
396 Oid snamespaceid;
397 char *snamespace;
398 char *sname;
399 char seqpersistence;
400 CreateSeqStmt *seqstmt;
401 AlterSeqStmt *altseqstmt;
402 List *attnamelist;
403
404 /* Make a copy of this as we may end up modifying it in the code below */
405 seqoptions = list_copy(seqoptions);
406
407 /*
408 * Check for non-SQL-standard options (not supported within CREATE
409 * SEQUENCE, because they'd be redundant), and remove them from the
410 * seqoptions list if found.
411 */
412 foreach(option, seqoptions)
413 {
414 DefElem *defel = lfirst_node(DefElem, option);
415
416 if (strcmp(defel->defname, "sequence_name") == 0)
417 {
418 if (nameEl)
419 errorConflictingDefElem(defel, cxt->pstate);
420 nameEl = defel;
421 seqoptions = foreach_delete_current(seqoptions, option);
422 }
423 else if (strcmp(defel->defname, "logged") == 0 ||
424 strcmp(defel->defname, "unlogged") == 0)
425 {
426 if (loggedEl)
427 errorConflictingDefElem(defel, cxt->pstate);
428 loggedEl = defel;
429 seqoptions = foreach_delete_current(seqoptions, option);
430 }
431 }
432
433 /*
434 * Determine namespace and name to use for the sequence.
435 */
436 if (nameEl)
437 {
438 /* Use specified name */
439 RangeVar *rv = makeRangeVarFromNameList(castNode(List, nameEl->arg));
440
441 snamespace = rv->schemaname;
442 if (!snamespace)
443 {
444 /* Given unqualified SEQUENCE NAME, select namespace */
445 if (cxt->rel)
446 snamespaceid = RelationGetNamespace(cxt->rel);
447 else
448 snamespaceid = RangeVarGetCreationNamespace(cxt->relation);
449 snamespace = get_namespace_name(snamespaceid);
450 }
451 sname = rv->relname;
452 }
453 else
454 {
455 /*
456 * Generate a name.
457 *
458 * Although we use ChooseRelationName, it's not guaranteed that the
459 * selected sequence name won't conflict; given sufficiently long
460 * field names, two different serial columns in the same table could
461 * be assigned the same sequence name, and we'd not notice since we
462 * aren't creating the sequence quite yet. In practice this seems
463 * quite unlikely to be a problem, especially since few people would
464 * need two serial columns in one table.
465 */
466 if (cxt->rel)
467 snamespaceid = RelationGetNamespace(cxt->rel);
468 else
469 {
470 snamespaceid = RangeVarGetCreationNamespace(cxt->relation);
471 RangeVarAdjustRelationPersistence(cxt->relation, snamespaceid);
472 }
473 snamespace = get_namespace_name(snamespaceid);
474 sname = ChooseRelationName(cxt->relation->relname,
475 column->colname,
476 "seq",
477 snamespaceid,
478 false);
479 }
480
481 ereport(DEBUG1,
482 (errmsg_internal("%s will create implicit sequence \"%s\" for serial column \"%s.%s\"",
483 cxt->stmtType, sname,
484 cxt->relation->relname, column->colname)));
485
486 /*
487 * Determine the persistence of the sequence. By default we copy the
488 * persistence of the table, but if LOGGED or UNLOGGED was specified, use
489 * that (as long as the table isn't TEMP).
490 *
491 * For CREATE TABLE, we get the persistence from cxt->relation, which
492 * comes from the CreateStmt in progress. For ALTER TABLE, the parser
493 * won't set cxt->relation->relpersistence, but we have cxt->rel as the
494 * existing table, so we copy the persistence from there.
495 */
496 seqpersistence = cxt->rel ? cxt->rel->rd_rel->relpersistence : cxt->relation->relpersistence;
497 if (loggedEl)
498 {
499 if (seqpersistence == RELPERSISTENCE_TEMP)
500 ereport(ERROR,
501 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
502 errmsg("cannot set logged status of a temporary sequence"),
503 parser_errposition(cxt->pstate, loggedEl->location)));
504 else if (strcmp(loggedEl->defname, "logged") == 0)
505 seqpersistence = RELPERSISTENCE_PERMANENT;
506 else
507 seqpersistence = RELPERSISTENCE_UNLOGGED;
508 }
509
510 /*
511 * Build a CREATE SEQUENCE command to create the sequence object, and add
512 * it to the list of things to be done before this CREATE/ALTER TABLE.
513 */
514 seqstmt = makeNode(CreateSeqStmt);
515 seqstmt->for_identity = for_identity;
516 seqstmt->sequence = makeRangeVar(snamespace, sname, -1);
517 seqstmt->sequence->relpersistence = seqpersistence;
518 seqstmt->options = seqoptions;
519
520 /*
521 * If a sequence data type was specified, add it to the options. Prepend
522 * to the list rather than append; in case a user supplied their own AS
523 * clause, the "redundant options" error will point to their occurrence,
524 * not our synthetic one.
525 */
526 if (seqtypid)
527 seqstmt->options = lcons(makeDefElem("as",
528 (Node *) makeTypeNameFromOid(seqtypid, -1),
529 -1),
530 seqstmt->options);
531
532 /*
533 * If this is ALTER ADD COLUMN, make sure the sequence will be owned by
534 * the table's owner. The current user might be someone else (perhaps a
535 * superuser, or someone who's only a member of the owning role), but the
536 * SEQUENCE OWNED BY mechanisms will bleat unless table and sequence have
537 * exactly the same owning role.
538 */
539 if (cxt->rel)
540 seqstmt->ownerId = cxt->rel->rd_rel->relowner;
541 else
542 seqstmt->ownerId = InvalidOid;
543
544 cxt->blist = lappend(cxt->blist, seqstmt);
545
546 /*
547 * Store the identity sequence name that we decided on. ALTER TABLE ...
548 * ADD COLUMN ... IDENTITY needs this so that it can fill the new column
549 * with values from the sequence, while the association of the sequence
550 * with the table is not set until after the ALTER TABLE.
551 */
552 column->identitySequence = seqstmt->sequence;
553
554 /*
555 * Build an ALTER SEQUENCE ... OWNED BY command to mark the sequence as
556 * owned by this column, and add it to the appropriate list of things to
557 * be done along with this CREATE/ALTER TABLE. In a CREATE or ALTER ADD
558 * COLUMN, it must be done after the statement because we don't know the
559 * column's attnum yet. But if we do have the attnum (in AT_AddIdentity),
560 * we can do the marking immediately, which improves some ALTER TABLE
561 * behaviors.
562 */
563 altseqstmt = makeNode(AlterSeqStmt);
564 altseqstmt->sequence = makeRangeVar(snamespace, sname, -1);
565 attnamelist = list_make3(makeString(snamespace),
566 makeString(cxt->relation->relname),
567 makeString(column->colname));
568 altseqstmt->options = list_make1(makeDefElem("owned_by",
569 (Node *) attnamelist, -1));
570 altseqstmt->for_identity = for_identity;
571
572 if (col_exists)
573 cxt->blist = lappend(cxt->blist, altseqstmt);
574 else
575 cxt->alist = lappend(cxt->alist, altseqstmt);
576
577 if (snamespace_p)
578 *snamespace_p = snamespace;
579 if (sname_p)
580 *sname_p = sname;
581}
582
583/*
584 * transformColumnDefinition -
585 * transform a single ColumnDef within CREATE TABLE
586 * Also used in ALTER TABLE ADD COLUMN
587 */
588static void
589transformColumnDefinition(CreateStmtContext *cxt, ColumnDef *column)
590{
591 bool is_serial;
592 bool saw_nullable;
593 bool saw_default;
594 bool saw_identity;
595 bool saw_generated;
596 bool need_notnull = false;
597 bool disallow_noinherit_notnull = false;
598 Constraint *notnull_constraint = NULL;
599
600 cxt->columns = lappend(cxt->columns, column);
601
602 /* Check for SERIAL pseudo-types */
603 is_serial = false;
604 if (column->typeName
605 && list_length(column->typeName->names) == 1
606 && !column->typeName->pct_type)
607 {
608 char *typname = strVal(linitial(column->typeName->names));
609
610 if (strcmp(typname, "smallserial") == 0 ||
611 strcmp(typname, "serial2") == 0)
612 {
613 is_serial = true;
614 column->typeName->names = NIL;
615 column->typeName->typeOid = INT2OID;
616 }
617 else if (strcmp(typname, "serial") == 0 ||
618 strcmp(typname, "serial4") == 0)
619 {
620 is_serial = true;
621 column->typeName->names = NIL;
622 column->typeName->typeOid = INT4OID;
623 }
624 else if (strcmp(typname, "bigserial") == 0 ||
625 strcmp(typname, "serial8") == 0)
626 {
627 is_serial = true;
628 column->typeName->names = NIL;
629 column->typeName->typeOid = INT8OID;
630 }
631
632 /*
633 * We have to reject "serial[]" explicitly, because once we've set
634 * typeid, LookupTypeName won't notice arrayBounds. We don't need any
635 * special coding for serial(typmod) though.
636 */
637 if (is_serial && column->typeName->arrayBounds != NIL)
638 ereport(ERROR,
639 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
640 errmsg("array of serial is not implemented"),
641 parser_errposition(cxt->pstate,
642 column->typeName->location)));
643 }
644
645 /* Do necessary work on the column type declaration */
646 if (column->typeName)
647 transformColumnType(cxt, column);
648
649 /* Special actions for SERIAL pseudo-types */
650 if (is_serial)
651 {
652 char *snamespace;
653 char *sname;
654 char *qstring;
655 A_Const *snamenode;
656 TypeCast *castnode;
657 FuncCall *funccallnode;
658 Constraint *constraint;
659
660 generateSerialExtraStmts(cxt, column,
661 column->typeName->typeOid, NIL,
662 false, false,
663 &snamespace, &sname);
664
665 /*
666 * Create appropriate constraints for SERIAL. We do this in full,
667 * rather than shortcutting, so that we will detect any conflicting
668 * constraints the user wrote (like a different DEFAULT).
669 *
670 * Create an expression tree representing the function call
671 * nextval('sequencename'). We cannot reduce the raw tree to cooked
672 * form until after the sequence is created, but there's no need to do
673 * so.
674 */
675 qstring = quote_qualified_identifier(snamespace, sname);
676 snamenode = makeNode(A_Const);
677 snamenode->val.node.type = T_String;
678 snamenode->val.sval.sval = qstring;
679 snamenode->location = -1;
680 castnode = makeNode(TypeCast);
681 castnode->typeName = SystemTypeName("regclass");
682 castnode->arg = (Node *) snamenode;
683 castnode->location = -1;
684 funccallnode = makeFuncCall(SystemFuncName("nextval"),
685 list_make1(castnode),
686 COERCE_EXPLICIT_CALL,
687 -1);
688 constraint = makeNode(Constraint);
689 constraint->contype = CONSTR_DEFAULT;
690 constraint->location = -1;
691 constraint->raw_expr = (Node *) funccallnode;
692 constraint->cooked_expr = NULL;
693 column->constraints = lappend(column->constraints, constraint);
694
695 /* have a not-null constraint added later */
696 need_notnull = true;
697 disallow_noinherit_notnull = true;
698 }
699
700 /* Process column constraints, if any... */
701 transformConstraintAttrs(cxt->pstate, column->constraints);
702
703 /*
704 * First, scan the column's constraints to see if a not-null constraint
705 * that we add must be prevented from being NO INHERIT. This should be
706 * enforced only for PRIMARY KEY, not IDENTITY or SERIAL. However, if the
707 * not-null constraint is specified as a table constraint rather than as a
708 * column constraint, AddRelationNotNullConstraints would raise an error
709 * if a NO INHERIT mismatch is found. To avoid inconsistently disallowing
710 * it in the table constraint case but not the column constraint case, we
711 * disallow it here as well. Maybe AddRelationNotNullConstraints can be
712 * improved someday, so that it doesn't complain, and then we can remove
713 * the restriction for SERIAL and IDENTITY here as well.
714 */
715 if (!disallow_noinherit_notnull)
716 {
717 foreach_node(Constraint, constraint, column->constraints)
718 {
719 switch (constraint->contype)
720 {
721 case CONSTR_IDENTITY:
722 case CONSTR_PRIMARY:
723 disallow_noinherit_notnull = true;
724 break;
725 default:
726 break;
727 }
728 }
729 }
730
731 /* Now scan them again to do full processing */
732 saw_nullable = false;
733 saw_default = false;
734 saw_identity = false;
735 saw_generated = false;
736
737 foreach_node(Constraint, constraint, column->constraints)
738 {
739 switch (constraint->contype)
740 {
741 case CONSTR_NULL:
742 if ((saw_nullable && column->is_not_null) || need_notnull)
743 ereport(ERROR,
744 (errcode(ERRCODE_SYNTAX_ERROR),
745 errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
746 column->colname, cxt->relation->relname),
747 parser_errposition(cxt->pstate,
748 constraint->location)));
749 column->is_not_null = false;
750 saw_nullable = true;
751 break;
752
753 case CONSTR_NOTNULL:
754 if (cxt->ispartitioned && constraint->is_no_inherit)
755 ereport(ERROR,
756 errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
757 errmsg("not-null constraints on partitioned tables cannot be NO INHERIT"));
758
759 /* Disallow conflicting [NOT] NULL markings */
760 if (saw_nullable && !column->is_not_null)
761 ereport(ERROR,
762 (errcode(ERRCODE_SYNTAX_ERROR),
763 errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
764 column->colname, cxt->relation->relname),
765 parser_errposition(cxt->pstate,
766 constraint->location)));
767
768 if (disallow_noinherit_notnull && constraint->is_no_inherit)
769 ereport(ERROR,
770 errcode(ERRCODE_SYNTAX_ERROR),
771 errmsg("conflicting NO INHERIT declarations for not-null constraints on column \"%s\"",
772 column->colname));
773
774 /*
775 * If this is the first time we see this column being marked
776 * not-null, add the constraint entry and keep track of it.
777 * Also, remove previous markings that we need one.
778 *
779 * If this is a redundant not-null specification, just check
780 * that it doesn't conflict with what was specified earlier.
781 *
782 * Any conflicts with table constraints will be further
783 * checked in AddRelationNotNullConstraints().
784 */
785 if (!column->is_not_null)
786 {
787 column->is_not_null = true;
788 saw_nullable = true;
789 need_notnull = false;
790
791 constraint->keys = list_make1(makeString(column->colname));
792 notnull_constraint = constraint;
793 cxt->nnconstraints = lappend(cxt->nnconstraints, constraint);
794 }
795 else if (notnull_constraint)
796 {
797 if (constraint->conname &&
798 notnull_constraint->conname &&
799 strcmp(notnull_constraint->conname, constraint->conname) != 0)
800 elog(ERROR, "conflicting not-null constraint names \"%s\" and \"%s\"",
801 notnull_constraint->conname, constraint->conname);
802
803 if (notnull_constraint->is_no_inherit != constraint->is_no_inherit)
804 ereport(ERROR,
805 errcode(ERRCODE_SYNTAX_ERROR),
806 errmsg("conflicting NO INHERIT declarations for not-null constraints on column \"%s\"",
807 column->colname));
808
809 if (!notnull_constraint->conname && constraint->conname)
810 notnull_constraint->conname = constraint->conname;
811 }
812
813 break;
814
815 case CONSTR_DEFAULT:
816 if (saw_default)
817 ereport(ERROR,
818 (errcode(ERRCODE_SYNTAX_ERROR),
819 errmsg("multiple default values specified for column \"%s\" of table \"%s\"",
820 column->colname, cxt->relation->relname),
821 parser_errposition(cxt->pstate,
822 constraint->location)));
823 column->raw_default = constraint->raw_expr;
824 Assert(constraint->cooked_expr == NULL);
825 saw_default = true;
826 break;
827
828 case CONSTR_IDENTITY:
829 {
830 Type ctype;
831 Oid typeOid;
832
833 if (cxt->ofType)
834 ereport(ERROR,
835 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
836 errmsg("identity columns are not supported on typed tables")));
837 if (cxt->partbound)
838 ereport(ERROR,
839 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
840 errmsg("identity columns are not supported on partitions")));
841
842 ctype = typenameType(cxt->pstate, column->typeName, NULL);
843 typeOid = ((Form_pg_type) GETSTRUCT(ctype))->oid;
844 ReleaseSysCache(ctype);
845
846 if (saw_identity)
847 ereport(ERROR,
848 (errcode(ERRCODE_SYNTAX_ERROR),
849 errmsg("multiple identity specifications for column \"%s\" of table \"%s\"",
850 column->colname, cxt->relation->relname),
851 parser_errposition(cxt->pstate,
852 constraint->location)));
853
854 generateSerialExtraStmts(cxt, column,
855 typeOid, constraint->options,
856 true, false,
857 NULL, NULL);
858
859 column->identity = constraint->generated_when;
860 saw_identity = true;
861
862 /*
863 * Identity columns are always NOT NULL, but we may have a
864 * constraint already.
865 */
866 if (!saw_nullable)
867 need_notnull = true;
868 else if (!column->is_not_null)
869 ereport(ERROR,
870 (errcode(ERRCODE_SYNTAX_ERROR),
871 errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
872 column->colname, cxt->relation->relname),
873 parser_errposition(cxt->pstate,
874 constraint->location)));
875 break;
876 }
877
878 case CONSTR_GENERATED:
879 if (cxt->ofType)
880 ereport(ERROR,
881 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
882 errmsg("generated columns are not supported on typed tables")));
883 if (saw_generated)
884 ereport(ERROR,
885 (errcode(ERRCODE_SYNTAX_ERROR),
886 errmsg("multiple generation clauses specified for column \"%s\" of table \"%s\"",
887 column->colname, cxt->relation->relname),
888 parser_errposition(cxt->pstate,
889 constraint->location)));
890 column->generated = constraint->generated_kind;
891 column->raw_default = constraint->raw_expr;
892 Assert(constraint->cooked_expr == NULL);
893 saw_generated = true;
894 break;
895
896 case CONSTR_CHECK:
897 cxt->ckconstraints = lappend(cxt->ckconstraints, constraint);
898 break;
899
900 case CONSTR_PRIMARY:
901 if (saw_nullable && !column->is_not_null)
902 ereport(ERROR,
903 (errcode(ERRCODE_SYNTAX_ERROR),
904 errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
905 column->colname, cxt->relation->relname),
906 parser_errposition(cxt->pstate,
907 constraint->location)));
908 need_notnull = true;
909
910 if (cxt->isforeign)
911 ereport(ERROR,
912 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
913 errmsg("primary key constraints are not supported on foreign tables"),
914 parser_errposition(cxt->pstate,
915 constraint->location)));
916 pg_fallthrough;
917
918 case CONSTR_UNIQUE:
919 if (cxt->isforeign)
920 ereport(ERROR,
921 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
922 errmsg("unique constraints are not supported on foreign tables"),
923 parser_errposition(cxt->pstate,
924 constraint->location)));
925 if (constraint->keys == NIL)
926 constraint->keys = list_make1(makeString(column->colname));
927 cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
928 break;
929
930 case CONSTR_EXCLUSION:
931 /* grammar does not allow EXCLUDE as a column constraint */
932 elog(ERROR, "column exclusion constraints are not supported");
933 break;
934
935 case CONSTR_FOREIGN:
936 if (cxt->isforeign)
937 ereport(ERROR,
938 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
939 errmsg("foreign key constraints are not supported on foreign tables"),
940 parser_errposition(cxt->pstate,
941 constraint->location)));
942
943 /*
944 * Fill in the current attribute's name and throw it into the
945 * list of FK constraints to be processed later.
946 */
947 constraint->fk_attrs = list_make1(makeString(column->colname));
948 cxt->fkconstraints = lappend(cxt->fkconstraints, constraint);
949 break;
950
951 case CONSTR_ATTR_DEFERRABLE:
952 case CONSTR_ATTR_NOT_DEFERRABLE:
953 case CONSTR_ATTR_DEFERRED:
954 case CONSTR_ATTR_IMMEDIATE:
955 case CONSTR_ATTR_ENFORCED:
956 case CONSTR_ATTR_NOT_ENFORCED:
957 /* transformConstraintAttrs took care of these */
958 break;
959
960 default:
961 elog(ERROR, "unrecognized constraint type: %d",
962 constraint->contype);
963 break;
964 }
965
966 if (saw_default && saw_identity)
967 ereport(ERROR,
968 (errcode(ERRCODE_SYNTAX_ERROR),
969 errmsg("both default and identity specified for column \"%s\" of table \"%s\"",
970 column->colname, cxt->relation->relname),
971 parser_errposition(cxt->pstate,
972 constraint->location)));
973
974 if (saw_default && saw_generated)
975 ereport(ERROR,
976 (errcode(ERRCODE_SYNTAX_ERROR),
977 errmsg("both default and generation expression specified for column \"%s\" of table \"%s\"",
978 column->colname, cxt->relation->relname),
979 parser_errposition(cxt->pstate,
980 constraint->location)));
981
982 if (saw_identity && saw_generated)
983 ereport(ERROR,
984 (errcode(ERRCODE_SYNTAX_ERROR),
985 errmsg("both identity and generation expression specified for column \"%s\" of table \"%s\"",
986 column->colname, cxt->relation->relname),
987 parser_errposition(cxt->pstate,
988 constraint->location)));
989 }
990
991 /*
992 * If we need a not-null constraint for PRIMARY KEY, SERIAL or IDENTITY,
993 * and one was not explicitly specified, add one now.
994 */
995 if (need_notnull && !(saw_nullable && column->is_not_null))
996 {
997 column->is_not_null = true;
998 notnull_constraint = makeNotNullConstraint(makeString(column->colname));
999 cxt->nnconstraints = lappend(cxt->nnconstraints, notnull_constraint);
1000 }
1001
1002 /*
1003 * If needed, generate ALTER FOREIGN TABLE ALTER COLUMN statement to add
1004 * per-column foreign data wrapper options to this column after creation.
1005 */
1006 if (column->fdwoptions != NIL)
1007 {
1008 AlterTableStmt *stmt;
1009 AlterTableCmd *cmd;
1010
1011 cmd = makeNode(AlterTableCmd);
1012 cmd->subtype = AT_AlterColumnGenericOptions;
1013 cmd->name = column->colname;
1014 cmd->def = (Node *) column->fdwoptions;
1015 cmd->behavior = DROP_RESTRICT;
1016 cmd->missing_ok = false;
1017
1018 stmt = makeNode(AlterTableStmt);
1019 stmt->relation = cxt->relation;
1020 stmt->cmds = NIL;
1021 stmt->objtype = OBJECT_FOREIGN_TABLE;
1022 stmt->cmds = lappend(stmt->cmds, cmd);
1023
1024 cxt->alist = lappend(cxt->alist, stmt);
1025 }
1026}
1027
1028/*
1029 * transformTableConstraint
1030 * transform a Constraint node within CREATE TABLE or ALTER TABLE
1031 */
1032static void
1033transformTableConstraint(CreateStmtContext *cxt, Constraint *constraint)
1034{
1035 switch (constraint->contype)
1036 {
1037 case CONSTR_PRIMARY:
1038 if (cxt->isforeign)
1039 ereport(ERROR,
1040 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1041 errmsg("primary key constraints are not supported on foreign tables"),
1042 parser_errposition(cxt->pstate,
1043 constraint->location)));
1044 cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
1045 break;
1046
1047 case CONSTR_UNIQUE:
1048 if (cxt->isforeign)
1049 ereport(ERROR,
1050 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1051 errmsg("unique constraints are not supported on foreign tables"),
1052 parser_errposition(cxt->pstate,
1053 constraint->location)));
1054 cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
1055 break;
1056
1057 case CONSTR_EXCLUSION:
1058 if (cxt->isforeign)
1059 ereport(ERROR,
1060 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1061 errmsg("exclusion constraints are not supported on foreign tables"),
1062 parser_errposition(cxt->pstate,
1063 constraint->location)));
1064 cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
1065 break;
1066
1067 case CONSTR_CHECK:
1068 cxt->ckconstraints = lappend(cxt->ckconstraints, constraint);
1069 break;
1070
1071 case CONSTR_NOTNULL:
1072 if (cxt->ispartitioned && constraint->is_no_inherit)
1073 ereport(ERROR,
1074 errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1075 errmsg("not-null constraints on partitioned tables cannot be NO INHERIT"));
1076
1077 cxt->nnconstraints = lappend(cxt->nnconstraints, constraint);
1078 break;
1079
1080 case CONSTR_FOREIGN:
1081 if (cxt->isforeign)
1082 ereport(ERROR,
1083 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1084 errmsg("foreign key constraints are not supported on foreign tables"),
1085 parser_errposition(cxt->pstate,
1086 constraint->location)));
1087 cxt->fkconstraints = lappend(cxt->fkconstraints, constraint);
1088 break;
1089
1090 case CONSTR_NULL:
1091 case CONSTR_DEFAULT:
1092 case CONSTR_ATTR_DEFERRABLE:
1093 case CONSTR_ATTR_NOT_DEFERRABLE:
1094 case CONSTR_ATTR_DEFERRED:
1095 case CONSTR_ATTR_IMMEDIATE:
1096 case CONSTR_ATTR_ENFORCED:
1097 case CONSTR_ATTR_NOT_ENFORCED:
1098 elog(ERROR, "invalid context for constraint type %d",
1099 constraint->contype);
1100 break;
1101
1102 default:
1103 elog(ERROR, "unrecognized constraint type: %d",
1104 constraint->contype);
1105 break;
1106 }
1107}
1108
1109/*
1110 * transformTableLikeClause
1111 *
1112 * Change the LIKE <srctable> portion of a CREATE TABLE statement into
1113 * column definitions that recreate the user defined column portions of
1114 * <srctable>. Also, if there are any LIKE options that we can't fully
1115 * process at this point, add the TableLikeClause to cxt->likeclauses, which
1116 * will cause utility.c to call expandTableLikeClause() after the new
1117 * table has been created.
1118 *
1119 * Some options are ignored. For example, as foreign tables have no storage,
1120 * these INCLUDING options have no effect: STORAGE, COMPRESSION, IDENTITY
1121 * and INDEXES. Similarly, INCLUDING INDEXES is ignored from a view.
1122 */
1123static void
1124transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_clause)
1125{
1126 AttrNumber parent_attno;
1127 Relation relation;
1128 TupleDesc tupleDesc;
1129 AclResult aclresult;
1130 char *comment;
1131 ParseCallbackState pcbstate;
1132
1133 setup_parser_errposition_callback(&pcbstate, cxt->pstate,
1134 table_like_clause->relation->location);
1135
1136 /* Open the relation referenced by the LIKE clause */
1137 relation = relation_openrv(table_like_clause->relation, AccessShareLock);
1138
1139 if (relation->rd_rel->relkind != RELKIND_RELATION &&
1140 relation->rd_rel->relkind != RELKIND_VIEW &&
1141 relation->rd_rel->relkind != RELKIND_MATVIEW &&
1142 relation->rd_rel->relkind != RELKIND_COMPOSITE_TYPE &&
1143 relation->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
1144 relation->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
1145 ereport(ERROR,
1146 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1147 errmsg("relation \"%s\" is invalid in LIKE clause",
1148 RelationGetRelationName(relation)),
1149 errdetail_relkind_not_supported(relation->rd_rel->relkind)));
1150
1151 cancel_parser_errposition_callback(&pcbstate);
1152
1153 /*
1154 * Check for privileges
1155 */
1156 if (relation->rd_rel->relkind == RELKIND_COMPOSITE_TYPE)
1157 {
1158 aclresult = object_aclcheck(TypeRelationId, relation->rd_rel->reltype, GetUserId(),
1159 ACL_USAGE);
1160 if (aclresult != ACLCHECK_OK)
1161 aclcheck_error(aclresult, OBJECT_TYPE,
1162 RelationGetRelationName(relation));
1163 }
1164 else
1165 {
1166 aclresult = pg_class_aclcheck(RelationGetRelid(relation), GetUserId(),
1167 ACL_SELECT);
1168 if (aclresult != ACLCHECK_OK)
1169 aclcheck_error(aclresult, get_relkind_objtype(relation->rd_rel->relkind),
1170 RelationGetRelationName(relation));
1171 }
1172
1173 tupleDesc = RelationGetDescr(relation);
1174
1175 /*
1176 * Insert the copied attributes into the cxt for the new table definition.
1177 * We must do this now so that they appear in the table in the relative
1178 * position where the LIKE clause is, as required by SQL99.
1179 */
1180 for (parent_attno = 1; parent_attno <= tupleDesc->natts;
1181 parent_attno++)
1182 {
1183 Form_pg_attribute attribute = TupleDescAttr(tupleDesc,
1184 parent_attno - 1);
1185 ColumnDef *def;
1186
1187 /*
1188 * Ignore dropped columns in the parent.
1189 */
1190 if (attribute->attisdropped)
1191 continue;
1192
1193 /*
1194 * Create a new column definition
1195 */
1196 def = makeColumnDef(NameStr(attribute->attname), attribute->atttypid,
1197 attribute->atttypmod, attribute->attcollation);
1198
1199 /*
1200 * Add to column list
1201 */
1202 cxt->columns = lappend(cxt->columns, def);
1203
1204 /*
1205 * Although we don't transfer the column's default/generation
1206 * expression now, we need to mark it GENERATED if appropriate.
1207 */
1208 if (attribute->atthasdef && attribute->attgenerated &&
1209 (table_like_clause->options & CREATE_TABLE_LIKE_GENERATED))
1210 def->generated = attribute->attgenerated;
1211
1212 /*
1213 * Copy identity if requested
1214 */
1215 if (attribute->attidentity &&
1216 (table_like_clause->options & CREATE_TABLE_LIKE_IDENTITY) &&
1217 !cxt->isforeign)
1218 {
1219 Oid seq_relid;
1220 List *seq_options;
1221
1222 /*
1223 * find sequence owned by old column; extract sequence parameters;
1224 * build new create sequence command
1225 */
1226 seq_relid = getIdentitySequence(relation, attribute->attnum, false);
1227 seq_options = sequence_options(seq_relid);
1228 generateSerialExtraStmts(cxt, def,
1229 InvalidOid, seq_options,
1230 true, false,
1231 NULL, NULL);
1232 def->identity = attribute->attidentity;
1233 }
1234
1235 /* Likewise, copy storage if requested */
1236 if ((table_like_clause->options & CREATE_TABLE_LIKE_STORAGE) &&
1237 !cxt->isforeign)
1238 def->storage = attribute->attstorage;
1239 else
1240 def->storage = 0;
1241
1242 /* Likewise, copy compression if requested */
1243 if ((table_like_clause->options & CREATE_TABLE_LIKE_COMPRESSION) != 0 &&
1244 CompressionMethodIsValid(attribute->attcompression) &&
1245 !cxt->isforeign)
1246 def->compression =
1247 pstrdup(GetCompressionMethodName(attribute->attcompression));
1248 else
1249 def->compression = NULL;
1250
1251 /* Likewise, copy comment if requested */
1252 if ((table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS) &&
1253 (comment = GetComment(attribute->attrelid,
1254 RelationRelationId,
1255 attribute->attnum)) != NULL)
1256 {
1257 CommentStmt *stmt = makeNode(CommentStmt);
1258
1259 stmt->objtype = OBJECT_COLUMN;
1260 stmt->object = (Node *) list_make3(makeString(cxt->relation->schemaname),
1261 makeString(cxt->relation->relname),
1262 makeString(def->colname));
1263 stmt->comment = comment;
1264
1265 cxt->alist = lappend(cxt->alist, stmt);
1266 }
1267 }
1268
1269 /*
1270 * Reproduce not-null constraints, if any, by copying them. We do this
1271 * regardless of options given.
1272 */
1273 if (tupleDesc->constr && tupleDesc->constr->has_not_null)
1274 {
1275 List *lst;
1276
1277 lst = RelationGetNotNullConstraints(RelationGetRelid(relation), false,
1278 true);
1279 cxt->nnconstraints = list_concat(cxt->nnconstraints, lst);
1280
1281 /* Copy comments on not-null constraints */
1282 if (table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS)
1283 {
1284 foreach_node(Constraint, nnconstr, lst)
1285 {
1286 if ((comment = GetComment(get_relation_constraint_oid(RelationGetRelid(relation),
1287 nnconstr->conname, false),
1288 ConstraintRelationId,
1289 0)) != NULL)
1290 {
1291 CommentStmt *stmt = makeNode(CommentStmt);
1292
1293 stmt->objtype = OBJECT_TABCONSTRAINT;
1294 stmt->object = (Node *) list_make3(makeString(cxt->relation->schemaname),
1295 makeString(cxt->relation->relname),
1296 makeString(nnconstr->conname));
1297 stmt->comment = comment;
1298 cxt->alist = lappend(cxt->alist, stmt);
1299 }
1300 }
1301 }
1302 }
1303
1304 /*
1305 * We cannot yet deal with defaults, CHECK constraints, indexes, or
1306 * statistics, since we don't yet know what column numbers the copied
1307 * columns will have in the finished table. If any of those options are
1308 * specified, add the LIKE clause to cxt->likeclauses so that
1309 * expandTableLikeClause will be called after we do know that.
1310 *
1311 * In order for this to work, we remember the relation OID so that
1312 * expandTableLikeClause is certain to open the same table.
1313 */
1314 if (table_like_clause->options &
1315 (CREATE_TABLE_LIKE_DEFAULTS |
1316 CREATE_TABLE_LIKE_GENERATED |
1317 CREATE_TABLE_LIKE_CONSTRAINTS |
1318 CREATE_TABLE_LIKE_INDEXES |
1319 CREATE_TABLE_LIKE_STATISTICS))
1320 {
1321 table_like_clause->relationOid = RelationGetRelid(relation);
1322 cxt->likeclauses = lappend(cxt->likeclauses, table_like_clause);
1323 }
1324
1325 /*
1326 * Close the parent rel, but keep our AccessShareLock on it until xact
1327 * commit. That will prevent someone else from deleting or ALTERing the
1328 * parent before we can run expandTableLikeClause.
1329 */
1330 table_close(relation, NoLock);
1331}
1332
1333/*
1334 * expandTableLikeClause
1335 *
1336 * Process LIKE options that require knowing the final column numbers
1337 * assigned to the new table's columns. This executes after we have
1338 * run DefineRelation for the new table. It returns a list of utility
1339 * commands that should be run to generate indexes etc.
1340 */
1341List *
1342expandTableLikeClause(RangeVar *heapRel, TableLikeClause *table_like_clause)
1343{
1344 List *result = NIL;
1345 List *atsubcmds = NIL;
1346 AttrNumber parent_attno;
1347 Relation relation;
1348 Relation childrel;
1349 TupleDesc tupleDesc;
1350 TupleConstr *constr;
1351 AttrMap *attmap;
1352 char *comment;
1353
1354 /*
1355 * Open the relation referenced by the LIKE clause. We should still have
1356 * the table lock obtained by transformTableLikeClause (and this'll throw
1357 * an assertion failure if not). Hence, no need to recheck privileges
1358 * etc. We must open the rel by OID not name, to be sure we get the same
1359 * table.
1360 */
1361 if (!OidIsValid(table_like_clause->relationOid))
1362 elog(ERROR, "expandTableLikeClause called on untransformed LIKE clause");
1363
1364 relation = relation_open(table_like_clause->relationOid, NoLock);
1365
1366 tupleDesc = RelationGetDescr(relation);
1367 constr = tupleDesc->constr;
1368
1369 /*
1370 * Open the newly-created child relation; we have lock on that too.
1371 */
1372 childrel = relation_openrv(heapRel, NoLock);
1373
1374 /*
1375 * Construct a map from the LIKE relation's attnos to the child rel's.
1376 * This re-checks type match etc, although it shouldn't be possible to
1377 * have a failure since both tables are locked.
1378 */
1379 attmap = build_attrmap_by_name(RelationGetDescr(childrel),
1380 tupleDesc,
1381 false);
1382
1383 /*
1384 * Process defaults, if required.
1385 */
1386 if ((table_like_clause->options &
1387 (CREATE_TABLE_LIKE_DEFAULTS | CREATE_TABLE_LIKE_GENERATED)) &&
1388 constr != NULL)
1389 {
1390 for (parent_attno = 1; parent_attno <= tupleDesc->natts;
1391 parent_attno++)
1392 {
1393 Form_pg_attribute attribute = TupleDescAttr(tupleDesc,
1394 parent_attno - 1);
1395
1396 /*
1397 * Ignore dropped columns in the parent.
1398 */
1399 if (attribute->attisdropped)
1400 continue;
1401
1402 /*
1403 * Copy default, if present and it should be copied. We have
1404 * separate options for plain default expressions and GENERATED
1405 * defaults.
1406 */
1407 if (attribute->atthasdef &&
1408 (attribute->attgenerated ?
1409 (table_like_clause->options & CREATE_TABLE_LIKE_GENERATED) :
1410 (table_like_clause->options & CREATE_TABLE_LIKE_DEFAULTS)))
1411 {
1412 Node *this_default;
1413 AlterTableCmd *atsubcmd;
1414 bool found_whole_row;
1415
1416 this_default = TupleDescGetDefault(tupleDesc, parent_attno);
1417 if (this_default == NULL)
1418 elog(ERROR, "default expression not found for attribute %d of relation \"%s\"",
1419 parent_attno, RelationGetRelationName(relation));
1420
1421 atsubcmd = makeNode(AlterTableCmd);
1422 atsubcmd->subtype = AT_CookedColumnDefault;
1423 atsubcmd->num = attmap->attnums[parent_attno - 1];
1424 atsubcmd->def = map_variable_attnos(this_default,
1425 1, 0,
1426 attmap,
1427 InvalidOid,
1428 &found_whole_row);
1429
1430 /*
1431 * Prevent this for the same reason as for constraints below.
1432 * Note that defaults cannot contain any vars, so it's OK that
1433 * the error message refers to generated columns.
1434 */
1435 if (found_whole_row)
1436 ereport(ERROR,
1437 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1438 errmsg("cannot convert whole-row table reference"),
1439 errdetail("Generation expression for column \"%s\" contains a whole-row reference to table \"%s\".",
1440 NameStr(attribute->attname),
1441 RelationGetRelationName(relation))));
1442
1443 atsubcmds = lappend(atsubcmds, atsubcmd);
1444 }
1445 }
1446 }
1447
1448 /*
1449 * Copy CHECK constraints if requested, being careful to adjust attribute
1450 * numbers so they match the child.
1451 */
1452 if ((table_like_clause->options & CREATE_TABLE_LIKE_CONSTRAINTS) &&
1453 constr != NULL)
1454 {
1455 int ccnum;
1456
1457 for (ccnum = 0; ccnum < constr->num_check; ccnum++)
1458 {
1459 char *ccname = constr->check[ccnum].ccname;
1460 char *ccbin = constr->check[ccnum].ccbin;
1461 bool ccenforced = constr->check[ccnum].ccenforced;
1462 bool ccnoinherit = constr->check[ccnum].ccnoinherit;
1463 Node *ccbin_node;
1464 bool found_whole_row;
1465 Constraint *n;
1466 AlterTableCmd *atsubcmd;
1467
1468 ccbin_node = map_variable_attnos(stringToNode(ccbin),
1469 1, 0,
1470 attmap,
1471 InvalidOid, &found_whole_row);
1472
1473 /*
1474 * We reject whole-row variables because the whole point of LIKE
1475 * is that the new table's rowtype might later diverge from the
1476 * parent's. So, while translation might be possible right now,
1477 * it wouldn't be possible to guarantee it would work in future.
1478 */
1479 if (found_whole_row)
1480 ereport(ERROR,
1481 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1482 errmsg("cannot convert whole-row table reference"),
1483 errdetail("Constraint \"%s\" contains a whole-row reference to table \"%s\".",
1484 ccname,
1485 RelationGetRelationName(relation))));
1486
1487 n = makeNode(Constraint);
1488 n->contype = CONSTR_CHECK;
1489 n->conname = pstrdup(ccname);
1490 n->location = -1;
1491 n->is_enforced = ccenforced;
1492 n->initially_valid = ccenforced; /* sic */
1493 n->is_no_inherit = ccnoinherit;
1494 n->raw_expr = NULL;
1495 n->cooked_expr = nodeToString(ccbin_node);
1496
1497 /* We can skip validation, since the new table should be empty. */
1498 n->skip_validation = true;
1499
1500 atsubcmd = makeNode(AlterTableCmd);
1501 atsubcmd->subtype = AT_AddConstraint;
1502 atsubcmd->def = (Node *) n;
1503 atsubcmds = lappend(atsubcmds, atsubcmd);
1504
1505 /* Copy comment on constraint */
1506 if ((table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS) &&
1507 (comment = GetComment(get_relation_constraint_oid(RelationGetRelid(relation),
1508 n->conname, false),
1509 ConstraintRelationId,
1510 0)) != NULL)
1511 {
1512 CommentStmt *stmt = makeNode(CommentStmt);
1513
1514 stmt->objtype = OBJECT_TABCONSTRAINT;
1515 stmt->object = (Node *) list_make3(makeString(heapRel->schemaname),
1516 makeString(heapRel->relname),
1517 makeString(n->conname));
1518 stmt->comment = comment;
1519
1520 result = lappend(result, stmt);
1521 }
1522 }
1523 }
1524
1525 /*
1526 * If we generated any ALTER TABLE actions above, wrap them into a single
1527 * ALTER TABLE command. Stick it at the front of the result, so it runs
1528 * before any CommentStmts we made above.
1529 */
1530 if (atsubcmds)
1531 {
1532 AlterTableStmt *atcmd = makeNode(AlterTableStmt);
1533
1534 atcmd->relation = copyObject(heapRel);
1535 atcmd->cmds = atsubcmds;
1536 atcmd->objtype = OBJECT_TABLE;
1537 atcmd->missing_ok = false;
1538 result = lcons(atcmd, result);
1539 }
1540
1541 /*
1542 * Process indexes if required.
1543 */
1544 if ((table_like_clause->options & CREATE_TABLE_LIKE_INDEXES) &&
1545 relation->rd_rel->relhasindex &&
1546 childrel->rd_rel->relkind != RELKIND_FOREIGN_TABLE)
1547 {
1548 List *parent_indexes;
1549 ListCell *l;
1550
1551 parent_indexes = RelationGetIndexList(relation);
1552
1553 foreach(l, parent_indexes)
1554 {
1555 Oid parent_index_oid = lfirst_oid(l);
1556 Relation parent_index;
1557 IndexStmt *index_stmt;
1558
1559 parent_index = index_open(parent_index_oid, AccessShareLock);
1560
1561 /* Build CREATE INDEX statement to recreate the parent_index */
1562 index_stmt = generateClonedIndexStmt(heapRel,
1563 parent_index,
1564 attmap,
1565 NULL);
1566
1567 /* Copy comment on index, if requested */
1568 if (table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS)
1569 {
1570 comment = GetComment(parent_index_oid, RelationRelationId, 0);
1571
1572 /*
1573 * We make use of IndexStmt's idxcomment option, so as not to
1574 * need to know now what name the index will have.
1575 */
1576 index_stmt->idxcomment = comment;
1577 }
1578
1579 result = lappend(result, index_stmt);
1580
1581 index_close(parent_index, AccessShareLock);
1582 }
1583 }
1584
1585 /*
1586 * Process extended statistics if required.
1587 */
1588 if (table_like_clause->options & CREATE_TABLE_LIKE_STATISTICS)
1589 {
1590 List *parent_extstats;
1591 ListCell *l;
1592
1593 parent_extstats = RelationGetStatExtList(relation);
1594
1595 foreach(l, parent_extstats)
1596 {
1597 Oid parent_stat_oid = lfirst_oid(l);
1598 CreateStatsStmt *stats_stmt;
1599
1600 stats_stmt = generateClonedExtStatsStmt(heapRel,
1601 RelationGetRelid(childrel),
1602 parent_stat_oid,
1603 attmap);
1604
1605 /* Copy comment on statistics object, if requested */
1606 if (table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS)
1607 {
1608 comment = GetComment(parent_stat_oid, StatisticExtRelationId, 0);
1609
1610 /*
1611 * We make use of CreateStatsStmt's stxcomment option, so as
1612 * not to need to know now what name the statistics will have.
1613 */
1614 stats_stmt->stxcomment = comment;
1615 }
1616
1617 result = lappend(result, stats_stmt);
1618 }
1619
1620 list_free(parent_extstats);
1621 }
1622
1623 /* Done with child rel */
1624 table_close(childrel, NoLock);
1625
1626 /*
1627 * Close the parent rel, but keep our AccessShareLock on it until xact
1628 * commit. That will prevent someone else from deleting or ALTERing the
1629 * parent before the child is committed.
1630 */
1631 table_close(relation, NoLock);
1632
1633 return result;
1634}
1635
1636static void
1637transformOfType(CreateStmtContext *cxt, TypeName *ofTypename)
1638{
1639 HeapTuple tuple;
1640 TupleDesc tupdesc;
1641 int i;
1642 Oid ofTypeId;
1643
1644 Assert(ofTypename);
1645
1646 tuple = typenameType(cxt->pstate, ofTypename, NULL);
1647 check_of_type(tuple);
1648 ofTypeId = ((Form_pg_type) GETSTRUCT(tuple))->oid;
1649 ofTypename->typeOid = ofTypeId; /* cached for later */
1650
1651 tupdesc = lookup_rowtype_tupdesc(ofTypeId, -1);
1652 for (i = 0; i < tupdesc->natts; i++)
1653 {
1654 Form_pg_attribute attr = TupleDescAttr(tupdesc, i);
1655 ColumnDef *n;
1656
1657 if (attr->attisdropped)
1658 continue;
1659
1660 n = makeColumnDef(NameStr(attr->attname), attr->atttypid,
1661 attr->atttypmod, attr->attcollation);
1662 n->is_from_type = true;
1663
1664 cxt->columns = lappend(cxt->columns, n);
1665 }
1666 ReleaseTupleDesc(tupdesc);
1667
1668 ReleaseSysCache(tuple);
1669}
1670
1671/*
1672 * Generate an IndexStmt node using information from an already existing index
1673 * "source_idx".
1674 *
1675 * heapRel is stored into the IndexStmt's relation field, but we don't use it
1676 * otherwise; some callers pass NULL, if they don't need it to be valid.
1677 * (The target relation might not exist yet, so we mustn't try to access it.)
1678 *
1679 * Attribute numbers in expression Vars are adjusted according to attmap.
1680 *
1681 * If constraintOid isn't NULL, we store the OID of any constraint associated
1682 * with the index there.
1683 *
1684 * Unlike transformIndexConstraint, we don't make any effort to force primary
1685 * key columns to be not-null. The larger cloning process this is part of
1686 * should have cloned their not-null status separately (and DefineIndex will
1687 * complain if that fails to happen).
1688 */
1689IndexStmt *
1690generateClonedIndexStmt(RangeVar *heapRel, Relation source_idx,
1691 const AttrMap *attmap,
1692 Oid *constraintOid)
1693{
1694 Oid source_relid = RelationGetRelid(source_idx);
1695 HeapTuple ht_idxrel;
1696 HeapTuple ht_idx;
1697 HeapTuple ht_am;
1698 Form_pg_class idxrelrec;
1699 Form_pg_index idxrec;
1700 Form_pg_am amrec;
1701 oidvector *indcollation;
1702 oidvector *indclass;
1703 IndexStmt *index;
1704 List *indexprs;
1705 ListCell *indexpr_item;
1706 Oid indrelid;
1707 int keyno;
1708 Oid keycoltype;
1709 Datum datum;
1710 bool isnull;
1711
1712 if (constraintOid)
1713 *constraintOid = InvalidOid;
1714
1715 /*
1716 * Fetch pg_class tuple of source index. We can't use the copy in the
1717 * relcache entry because it doesn't include optional fields.
1718 */
1719 ht_idxrel = SearchSysCache1(RELOID, ObjectIdGetDatum(source_relid));
1720 if (!HeapTupleIsValid(ht_idxrel))
1721 elog(ERROR, "cache lookup failed for relation %u", source_relid);
1722 idxrelrec = (Form_pg_class) GETSTRUCT(ht_idxrel);
1723
1724 /* Fetch pg_index tuple for source index from relcache entry */
1725 ht_idx = source_idx->rd_indextuple;
1726 idxrec = (Form_pg_index) GETSTRUCT(ht_idx);
1727 indrelid = idxrec->indrelid;
1728
1729 /* Fetch the pg_am tuple of the index' access method */
1730 ht_am = SearchSysCache1(AMOID, ObjectIdGetDatum(idxrelrec->relam));
1731 if (!HeapTupleIsValid(ht_am))
1732 elog(ERROR, "cache lookup failed for access method %u",
1733 idxrelrec->relam);
1734 amrec = (Form_pg_am) GETSTRUCT(ht_am);
1735
1736 /* Extract indcollation from the pg_index tuple */
1737 datum = SysCacheGetAttrNotNull(INDEXRELID, ht_idx,
1738 Anum_pg_index_indcollation);
1739 indcollation = (oidvector *) DatumGetPointer(datum);
1740
1741 /* Extract indclass from the pg_index tuple */
1742 datum = SysCacheGetAttrNotNull(INDEXRELID, ht_idx, Anum_pg_index_indclass);
1743 indclass = (oidvector *) DatumGetPointer(datum);
1744
1745 /* Begin building the IndexStmt */
1746 index = makeNode(IndexStmt);
1747 index->relation = heapRel;
1748 index->accessMethod = pstrdup(NameStr(amrec->amname));
1749 if (OidIsValid(idxrelrec->reltablespace))
1750 index->tableSpace = get_tablespace_name(idxrelrec->reltablespace);
1751 else
1752 index->tableSpace = NULL;
1753 index->excludeOpNames = NIL;
1754 index->idxcomment = NULL;
1755 index->indexOid = InvalidOid;
1756 index->oldNumber = InvalidRelFileNumber;
1757 index->oldCreateSubid = InvalidSubTransactionId;
1758 index->oldFirstRelfilelocatorSubid = InvalidSubTransactionId;
1759 index->unique = idxrec->indisunique;
1760 index->nulls_not_distinct = idxrec->indnullsnotdistinct;
1761 index->primary = idxrec->indisprimary;
1762 index->iswithoutoverlaps = (idxrec->indisprimary || idxrec->indisunique) && idxrec->indisexclusion;
1763 index->transformed = true; /* don't need transformIndexStmt */
1764 index->concurrent = false;
1765 index->if_not_exists = false;
1766 index->reset_default_tblspc = false;
1767
1768 /*
1769 * We don't try to preserve the name of the source index; instead, just
1770 * let DefineIndex() choose a reasonable name. (If we tried to preserve
1771 * the name, we'd get duplicate-relation-name failures unless the source
1772 * table was in a different schema.)
1773 */
1774 index->idxname = NULL;
1775
1776 /*
1777 * If the index is marked PRIMARY or has an exclusion condition, it's
1778 * certainly from a constraint; else, if it's not marked UNIQUE, it
1779 * certainly isn't. If it is or might be from a constraint, we have to
1780 * fetch the pg_constraint record.
1781 */
1782 if (index->primary || index->unique || idxrec->indisexclusion)
1783 {
1784 Oid constraintId = get_index_constraint(source_relid);
1785
1786 if (OidIsValid(constraintId))
1787 {
1788 HeapTuple ht_constr;
1789 Form_pg_constraint conrec;
1790
1791 if (constraintOid)
1792 *constraintOid = constraintId;
1793
1794 ht_constr = SearchSysCache1(CONSTROID,
1795 ObjectIdGetDatum(constraintId));
1796 if (!HeapTupleIsValid(ht_constr))
1797 elog(ERROR, "cache lookup failed for constraint %u",
1798 constraintId);
1799 conrec = (Form_pg_constraint) GETSTRUCT(ht_constr);
1800
1801 index->isconstraint = true;
1802 index->deferrable = conrec->condeferrable;
1803 index->initdeferred = conrec->condeferred;
1804
1805 /* If it's an exclusion constraint, we need the operator names */
1806 if (idxrec->indisexclusion)
1807 {
1808 Datum *elems;
1809 int nElems;
1810 int i;
1811
1812 Assert(conrec->contype == CONSTRAINT_EXCLUSION ||
1813 (index->iswithoutoverlaps &&
1814 (conrec->contype == CONSTRAINT_PRIMARY || conrec->contype == CONSTRAINT_UNIQUE)));
1815 /* Extract operator OIDs from the pg_constraint tuple */
1816 datum = SysCacheGetAttrNotNull(CONSTROID, ht_constr,
1817 Anum_pg_constraint_conexclop);
1818 deconstruct_array_builtin(DatumGetArrayTypeP(datum), OIDOID, &elems, NULL, &nElems);
1819
1820 for (i = 0; i < nElems; i++)
1821 {
1822 Oid operid = DatumGetObjectId(elems[i]);
1823 HeapTuple opertup;
1824 Form_pg_operator operform;
1825 char *oprname;
1826 char *nspname;
1827 List *namelist;
1828
1829 opertup = SearchSysCache1(OPEROID,
1830 ObjectIdGetDatum(operid));
1831 if (!HeapTupleIsValid(opertup))
1832 elog(ERROR, "cache lookup failed for operator %u",
1833 operid);
1834 operform = (Form_pg_operator) GETSTRUCT(opertup);
1835 oprname = pstrdup(NameStr(operform->oprname));
1836 /* For simplicity we always schema-qualify the op name */
1837 nspname = get_namespace_name(operform->oprnamespace);
1838 namelist = list_make2(makeString(nspname),
1839 makeString(oprname));
1840 index->excludeOpNames = lappend(index->excludeOpNames,
1841 namelist);
1842 ReleaseSysCache(opertup);
1843 }
1844 }
1845
1846 ReleaseSysCache(ht_constr);
1847 }
1848 else
1849 index->isconstraint = false;
1850 }
1851 else
1852 index->isconstraint = false;
1853
1854 /* Get the index expressions, if any */
1855 datum = SysCacheGetAttr(INDEXRELID, ht_idx,
1856 Anum_pg_index_indexprs, &isnull);
1857 if (!isnull)
1858 {
1859 char *exprsString;
1860
1861 exprsString = TextDatumGetCString(datum);
1862 indexprs = (List *) stringToNode(exprsString);
1863 }
1864 else
1865 indexprs = NIL;
1866
1867 /* Build the list of IndexElem */
1868 index->indexParams = NIL;
1869 index->indexIncludingParams = NIL;
1870
1871 indexpr_item = list_head(indexprs);
1872 for (keyno = 0; keyno < idxrec->indnkeyatts; keyno++)
1873 {
1874 IndexElem *iparam;
1875 AttrNumber attnum = idxrec->indkey.values[keyno];
1876 Form_pg_attribute attr = TupleDescAttr(RelationGetDescr(source_idx),
1877 keyno);
1878 int16 opt = source_idx->rd_indoption[keyno];
1879
1880 iparam = makeNode(IndexElem);
1881
1882 if (AttributeNumberIsValid(attnum))
1883 {
1884 /* Simple index column */
1885 char *attname;
1886
1887 attname = get_attname(indrelid, attnum, false);
1888 keycoltype = get_atttype(indrelid, attnum);
1889
1890 iparam->name = attname;
1891 iparam->expr = NULL;
1892 }
1893 else
1894 {
1895 /* Expressional index */
1896 Node *indexkey;
1897 bool found_whole_row;
1898
1899 if (indexpr_item == NULL)
1900 elog(ERROR, "too few entries in indexprs list");
1901 indexkey = (Node *) lfirst(indexpr_item);
1902 indexpr_item = lnext(indexprs, indexpr_item);
1903
1904 /* Adjust Vars to match new table's column numbering */
1905 indexkey = map_variable_attnos(indexkey,
1906 1, 0,
1907 attmap,
1908 InvalidOid, &found_whole_row);
1909
1910 /* As in expandTableLikeClause, reject whole-row variables */
1911 if (found_whole_row)
1912 ereport(ERROR,
1913 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1914 errmsg("cannot convert whole-row table reference"),
1915 errdetail("Index \"%s\" contains a whole-row table reference.",
1916 RelationGetRelationName(source_idx))));
1917
1918 iparam->name = NULL;
1919 iparam->expr = indexkey;
1920
1921 keycoltype = exprType(indexkey);
1922 }
1923
1924 /* Copy the original index column name */
1925 iparam->indexcolname = pstrdup(NameStr(attr->attname));
1926
1927 /* Add the collation name, if non-default */
1928 iparam->collation = get_collation(indcollation->values[keyno], keycoltype);
1929
1930 /* Add the operator class name, if non-default */
1931 iparam->opclass = get_opclass(indclass->values[keyno], keycoltype);
1932 iparam->opclassopts =
1933 untransformRelOptions(get_attoptions(source_relid, keyno + 1));
1934
1935 iparam->ordering = SORTBY_DEFAULT;
1936 iparam->nulls_ordering = SORTBY_NULLS_DEFAULT;
1937
1938 /* Adjust options if necessary */
1939 if (source_idx->rd_indam->amcanorder)
1940 {
1941 /*
1942 * If it supports sort ordering, copy DESC and NULLS opts. Don't
1943 * set non-default settings unnecessarily, though, so as to
1944 * improve the chance of recognizing equivalence to constraint
1945 * indexes.
1946 */
1947 if (opt & INDOPTION_DESC)
1948 {
1949 iparam->ordering = SORTBY_DESC;
1950 if ((opt & INDOPTION_NULLS_FIRST) == 0)
1951 iparam->nulls_ordering = SORTBY_NULLS_LAST;
1952 }
1953 else
1954 {
1955 if (opt & INDOPTION_NULLS_FIRST)
1956 iparam->nulls_ordering = SORTBY_NULLS_FIRST;
1957 }
1958 }
1959
1960 iparam->location = -1;
1961
1962 index->indexParams = lappend(index->indexParams, iparam);
1963 }
1964
1965 /* Handle included columns separately */
1966 for (keyno = idxrec->indnkeyatts; keyno < idxrec->indnatts; keyno++)
1967 {
1968 IndexElem *iparam;
1969 AttrNumber attnum = idxrec->indkey.values[keyno];
1970 Form_pg_attribute attr = TupleDescAttr(RelationGetDescr(source_idx),
1971 keyno);
1972
1973 iparam = makeNode(IndexElem);
1974
1975 if (AttributeNumberIsValid(attnum))
1976 {
1977 /* Simple index column */
1978 char *attname;
1979
1980 attname = get_attname(indrelid, attnum, false);
1981
1982 iparam->name = attname;
1983 iparam->expr = NULL;
1984 }
1985 else
1986 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 iparam->indexcolname = pstrdup(NameStr(attr->attname));
1992
1993 iparam->location = -1;
1994
1995 index->indexIncludingParams = lappend(index->indexIncludingParams, iparam);
1996 }
1997 /* Copy reloptions if any */
1998 datum = SysCacheGetAttr(RELOID, ht_idxrel,
1999 Anum_pg_class_reloptions, &isnull);
2000 if (!isnull)
2001 index->options = untransformRelOptions(datum);
2002
2003 /* If it's a partial index, decompile and append the predicate */
2004 datum = SysCacheGetAttr(INDEXRELID, ht_idx,
2005 Anum_pg_index_indpred, &isnull);
2006 if (!isnull)
2007 {
2008 char *pred_str;
2009 Node *pred_tree;
2010 bool found_whole_row;
2011
2012 /* Convert text string to node tree */
2013 pred_str = TextDatumGetCString(datum);
2014 pred_tree = (Node *) stringToNode(pred_str);
2015
2016 /* Adjust Vars to match new table's column numbering */
2017 pred_tree = map_variable_attnos(pred_tree,
2018 1, 0,
2019 attmap,
2020 InvalidOid, &found_whole_row);
2021
2022 /* As in expandTableLikeClause, reject whole-row variables */
2023 if (found_whole_row)
2024 ereport(ERROR,
2025 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2026 errmsg("cannot convert whole-row table reference"),
2027 errdetail("Index \"%s\" contains a whole-row table reference.",
2028 RelationGetRelationName(source_idx))));
2029
2030 index->whereClause = pred_tree;
2031 }
2032
2033 /* Clean up */
2034 ReleaseSysCache(ht_idxrel);
2035 ReleaseSysCache(ht_am);
2036
2037 return index;
2038}
2039
2040/*
2041 * Generate a CreateStatsStmt node using information from an already existing
2042 * extended statistic "source_statsid", for the rel identified by heapRel and
2043 * heapRelid.
2044 *
2045 * stxkeys in the source statistic holds attribute numbers from the parent
2046 * relation. Those attnums, along with the attribute numbers referenced by
2047 * Vars inside the expression tree, are remapped to the new relation's
2048 * numbering according to attmap.
2049 */
2050static CreateStatsStmt *
2051generateClonedExtStatsStmt(RangeVar *heapRel, Oid heapRelid,
2052 Oid source_statsid, const AttrMap *attmap)
2053{
2054 HeapTuple ht_stats;
2055 Form_pg_statistic_ext statsrec;
2056 CreateStatsStmt *stats;
2057 List *stat_types = NIL;
2058 List *def_names = NIL;
2059 bool isnull;
2060 Datum datum;
2061 ArrayType *arr;
2062 char *enabled;
2063 int i;
2064
2065 Assert(OidIsValid(heapRelid));
2066 Assert(heapRel != NULL);
2067
2068 /*
2069 * Fetch pg_statistic_ext tuple of source statistics object.
2070 */
2071 ht_stats = SearchSysCache1(STATEXTOID, ObjectIdGetDatum(source_statsid));
2072 if (!HeapTupleIsValid(ht_stats))
2073 elog(ERROR, "cache lookup failed for statistics object %u", source_statsid);
2074 statsrec = (Form_pg_statistic_ext) GETSTRUCT(ht_stats);
2075
2076 /* Determine which statistics types exist */
2077 datum = SysCacheGetAttrNotNull(STATEXTOID, ht_stats,
2078 Anum_pg_statistic_ext_stxkind);
2079 arr = DatumGetArrayTypeP(datum);
2080 if (ARR_NDIM(arr) != 1 ||
2081 ARR_HASNULL(arr) ||
2082 ARR_ELEMTYPE(arr) != CHAROID)
2083 elog(ERROR, "stxkind is not a 1-D char array");
2084 enabled = (char *) ARR_DATA_PTR(arr);
2085 for (i = 0; i < ARR_DIMS(arr)[0]; i++)
2086 {
2087 if (enabled[i] == STATS_EXT_NDISTINCT)
2088 stat_types = lappend(stat_types, makeString("ndistinct"));
2089 else if (enabled[i] == STATS_EXT_DEPENDENCIES)
2090 stat_types = lappend(stat_types, makeString("dependencies"));
2091 else if (enabled[i] == STATS_EXT_MCV)
2092 stat_types = lappend(stat_types, makeString("mcv"));
2093 else if (enabled[i] == STATS_EXT_EXPRESSIONS)
2094 /* expression stats are not exposed to users */
2095 continue;
2096 else
2097 elog(ERROR, "unrecognized statistics kind %c", enabled[i]);
2098 }
2099
2100 /* Determine which columns the statistics are on */
2101 for (i = 0; i < statsrec->stxkeys.dim1; i++)
2102 {
2103 StatsElem *selem = makeNode(StatsElem);
2104 AttrNumber attnum = statsrec->stxkeys.values[i];
2105
2106 selem->name =
2107 get_attname(heapRelid, attmap->attnums[attnum - 1], false);
2108 selem->expr = NULL;
2109
2110 def_names = lappend(def_names, selem);
2111 }
2112
2113 /*
2114 * Now handle expressions, if there are any. The order (with respect to
2115 * regular attributes) does not really matter for extended stats, so we
2116 * simply append them after simple column references.
2117 *
2118 * XXX Some places during build/estimation treat expressions as if they
2119 * are before attributes, but for the CREATE command that's entirely
2120 * irrelevant.
2121 */
2122 datum = SysCacheGetAttr(STATEXTOID, ht_stats,
2123 Anum_pg_statistic_ext_stxexprs, &isnull);
2124
2125 if (!isnull)
2126 {
2127 ListCell *lc;
2128 List *exprs = NIL;
2129 char *exprsString;
2130
2131 exprsString = TextDatumGetCString(datum);
2132 exprs = (List *) stringToNode(exprsString);
2133
2134 foreach(lc, exprs)
2135 {
2136 Node *expr = (Node *) lfirst(lc);
2137 StatsElem *selem = makeNode(StatsElem);
2138 bool found_whole_row;
2139
2140 /* Adjust Vars to match new table's column numbering */
2141 expr = map_variable_attnos(expr,
2142 1, 0,
2143 attmap,
2144 InvalidOid,
2145 &found_whole_row);
2146
2147 selem->name = NULL;
2148 selem->expr = expr;
2149
2150 def_names = lappend(def_names, selem);
2151 }
2152
2153 pfree(exprsString);
2154 }
2155
2156 /* finally, build the output node */
2157 stats = makeNode(CreateStatsStmt);
2158 stats->defnames = NULL;
2159 stats->stat_types = stat_types;
2160 stats->exprs = def_names;
2161 stats->relations = list_make1(heapRel);
2162 stats->stxcomment = NULL;
2163 stats->transformed = true; /* don't need transformStatsStmt again */
2164 stats->if_not_exists = false;
2165
2166 /* Clean up */
2167 ReleaseSysCache(ht_stats);
2168
2169 return stats;
2170}
2171
2172/*
2173 * get_collation - fetch qualified name of a collation
2174 *
2175 * If collation is InvalidOid or is the default for the given actual_datatype,
2176 * then the return value is NIL.
2177 */
2178static List *
2179get_collation(Oid collation, Oid actual_datatype)
2180{
2181 List *result;
2182 HeapTuple ht_coll;
2183 Form_pg_collation coll_rec;
2184 char *nsp_name;
2185 char *coll_name;
2186
2187 if (!OidIsValid(collation))
2188 return NIL; /* easy case */
2189 if (collation == get_typcollation(actual_datatype))
2190 return NIL; /* just let it default */
2191
2192 ht_coll = SearchSysCache1(COLLOID, ObjectIdGetDatum(collation));
2193 if (!HeapTupleIsValid(ht_coll))
2194 elog(ERROR, "cache lookup failed for collation %u", collation);
2195 coll_rec = (Form_pg_collation) GETSTRUCT(ht_coll);
2196
2197 /* For simplicity, we always schema-qualify the name */
2198 nsp_name = get_namespace_name(coll_rec->collnamespace);
2199 coll_name = pstrdup(NameStr(coll_rec->collname));
2200 result = list_make2(makeString(nsp_name), makeString(coll_name));
2201
2202 ReleaseSysCache(ht_coll);
2203 return result;
2204}
2205
2206/*
2207 * get_opclass - fetch qualified name of an index operator class
2208 *
2209 * If the opclass is the default for the given actual_datatype, then
2210 * the return value is NIL.
2211 */
2212static List *
2213get_opclass(Oid opclass, Oid actual_datatype)
2214{
2215 List *result = NIL;
2216 HeapTuple ht_opc;
2217 Form_pg_opclass opc_rec;
2218
2219 ht_opc = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclass));
2220 if (!HeapTupleIsValid(ht_opc))
2221 elog(ERROR, "cache lookup failed for opclass %u", opclass);
2222 opc_rec = (Form_pg_opclass) GETSTRUCT(ht_opc);
2223
2224 if (GetDefaultOpClass(actual_datatype, opc_rec->opcmethod) != opclass)
2225 {
2226 /* For simplicity, we always schema-qualify the name */
2227 char *nsp_name = get_namespace_name(opc_rec->opcnamespace);
2228 char *opc_name = pstrdup(NameStr(opc_rec->opcname));
2229
2230 result = list_make2(makeString(nsp_name), makeString(opc_name));
2231 }
2232
2233 ReleaseSysCache(ht_opc);
2234 return result;
2235}
2236
2237
2238/*
2239 * transformIndexConstraints
2240 * Handle UNIQUE, PRIMARY KEY, EXCLUDE constraints, which create indexes.
2241 * We also merge in any index definitions arising from
2242 * LIKE ... INCLUDING INDEXES.
2243 */
2244static void
2245transformIndexConstraints(CreateStmtContext *cxt)
2246{
2247 IndexStmt *index;
2248 List *indexlist = NIL;
2249 List *finalindexlist = NIL;
2250 ListCell *lc;
2251
2252 /*
2253 * Run through the constraints that need to generate an index, and do so.
2254 *
2255 * For PRIMARY KEY, this queues not-null constraints for each column, if
2256 * needed.
2257 */
2258 foreach(lc, cxt->ixconstraints)
2259 {
2260 Constraint *constraint = lfirst_node(Constraint, lc);
2261
2262 Assert(constraint->contype == CONSTR_PRIMARY ||
2263 constraint->contype == CONSTR_UNIQUE ||
2264 constraint->contype == CONSTR_EXCLUSION);
2265
2266 index = transformIndexConstraint(constraint, cxt);
2267
2268 indexlist = lappend(indexlist, index);
2269 }
2270
2271 /*
2272 * Scan the index list and remove any redundant index specifications. This
2273 * can happen if, for instance, the user writes UNIQUE PRIMARY KEY. A
2274 * strict reading of SQL would suggest raising an error instead, but that
2275 * strikes me as too anal-retentive. - tgl 2001-02-14
2276 *
2277 * XXX in ALTER TABLE case, it'd be nice to look for duplicate
2278 * pre-existing indexes, too.
2279 */
2280 if (cxt->pkey != NULL)
2281 {
2282 /* Make sure we keep the PKEY index in preference to others... */
2283 finalindexlist = list_make1(cxt->pkey);
2284 }
2285
2286 foreach(lc, indexlist)
2287 {
2288 bool keep = true;
2289 ListCell *k;
2290
2291 index = lfirst(lc);
2292
2293 /* if it's pkey, it's already in finalindexlist */
2294 if (index == cxt->pkey)
2295 continue;
2296
2297 foreach(k, finalindexlist)
2298 {
2299 IndexStmt *priorindex = lfirst(k);
2300
2301 if (equal(index->indexParams, priorindex->indexParams) &&
2302 equal(index->indexIncludingParams, priorindex->indexIncludingParams) &&
2303 equal(index->whereClause, priorindex->whereClause) &&
2304 equal(index->excludeOpNames, priorindex->excludeOpNames) &&
2305 strcmp(index->accessMethod, priorindex->accessMethod) == 0 &&
2306 index->nulls_not_distinct == priorindex->nulls_not_distinct &&
2307 index->deferrable == priorindex->deferrable &&
2308 index->initdeferred == priorindex->initdeferred)
2309 {
2310 priorindex->unique |= index->unique;
2311
2312 /*
2313 * If the prior index is as yet unnamed, and this one is
2314 * named, then transfer the name to the prior index. This
2315 * ensures that if we have named and unnamed constraints,
2316 * we'll use (at least one of) the names for the index.
2317 */
2318 if (priorindex->idxname == NULL)
2319 priorindex->idxname = index->idxname;
2320 keep = false;
2321 break;
2322 }
2323 }
2324
2325 if (keep)
2326 finalindexlist = lappend(finalindexlist, index);
2327 }
2328
2329 /*
2330 * Now append all the IndexStmts to cxt->alist.
2331 */
2332 cxt->alist = list_concat(cxt->alist, finalindexlist);
2333}
2334
2335/*
2336 * transformIndexConstraint
2337 * Transform one UNIQUE, PRIMARY KEY, or EXCLUDE constraint for
2338 * transformIndexConstraints. An IndexStmt is returned.
2339 *
2340 * For a PRIMARY KEY constraint, we additionally create not-null constraints
2341 * for columns that don't already have them.
2342 */
2343static IndexStmt *
2344transformIndexConstraint(Constraint *constraint, CreateStmtContext *cxt)
2345{
2346 IndexStmt *index;
2347 ListCell *lc;
2348
2349 index = makeNode(IndexStmt);
2350
2351 index->unique = (constraint->contype != CONSTR_EXCLUSION);
2352 index->primary = (constraint->contype == CONSTR_PRIMARY);
2353 if (index->primary)
2354 {
2355 if (cxt->pkey != NULL)
2356 ereport(ERROR,
2357 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
2358 errmsg("multiple primary keys for table \"%s\" are not allowed",
2359 cxt->relation->relname),
2360 parser_errposition(cxt->pstate, constraint->location)));
2361 cxt->pkey = index;
2362
2363 /*
2364 * In ALTER TABLE case, a primary index might already exist, but
2365 * DefineIndex will check for it.
2366 */
2367 }
2368 index->nulls_not_distinct = constraint->nulls_not_distinct;
2369 index->isconstraint = true;
2370 index->iswithoutoverlaps = constraint->without_overlaps;
2371 index->deferrable = constraint->deferrable;
2372 index->initdeferred = constraint->initdeferred;
2373
2374 if (constraint->conname != NULL)
2375 index->idxname = pstrdup(constraint->conname);
2376 else
2377 index->idxname = NULL; /* DefineIndex will choose name */
2378
2379 index->relation = cxt->relation;
2380 index->accessMethod = constraint->access_method ? constraint->access_method : DEFAULT_INDEX_TYPE;
2381 index->options = constraint->options;
2382 index->tableSpace = constraint->indexspace;
2383 index->whereClause = constraint->where_clause;
2384 index->indexParams = NIL;
2385 index->indexIncludingParams = NIL;
2386 index->excludeOpNames = NIL;
2387 index->idxcomment = NULL;
2388 index->indexOid = InvalidOid;
2389 index->oldNumber = InvalidRelFileNumber;
2390 index->oldCreateSubid = InvalidSubTransactionId;
2391 index->oldFirstRelfilelocatorSubid = InvalidSubTransactionId;
2392 index->transformed = false;
2393 index->concurrent = false;
2394 index->if_not_exists = false;
2395 index->reset_default_tblspc = constraint->reset_default_tblspc;
2396
2397 /*
2398 * If it's ALTER TABLE ADD CONSTRAINT USING INDEX, look up the index and
2399 * verify it's usable, then extract the implied column name list. (We
2400 * will not actually need the column name list at runtime, but we need it
2401 * now to check for duplicate column entries below.)
2402 */
2403 if (constraint->indexname != NULL)
2404 {
2405 char *index_name = constraint->indexname;
2406 Relation heap_rel = cxt->rel;
2407 Oid index_oid;
2408 Relation index_rel;
2409 Form_pg_index index_form;
2410 oidvector *indclass;
2411 Datum indclassDatum;
2412 int i;
2413
2414 /* Grammar should not allow this with explicit column list */
2415 Assert(constraint->keys == NIL);
2416
2417 /* Grammar should only allow PRIMARY and UNIQUE constraints */
2418 Assert(constraint->contype == CONSTR_PRIMARY ||
2419 constraint->contype == CONSTR_UNIQUE);
2420
2421 /* Must be ALTER, not CREATE, but grammar doesn't enforce that */
2422 if (!cxt->isalter)
2423 ereport(ERROR,
2424 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2425 errmsg("cannot use an existing index in CREATE TABLE"),
2426 parser_errposition(cxt->pstate, constraint->location)));
2427
2428 /* Look for the index in the same schema as the table */
2429 index_oid = get_relname_relid(index_name, RelationGetNamespace(heap_rel));
2430
2431 if (!OidIsValid(index_oid))
2432 ereport(ERROR,
2433 (errcode(ERRCODE_UNDEFINED_OBJECT),
2434 errmsg("index \"%s\" does not exist", index_name),
2435 parser_errposition(cxt->pstate, constraint->location)));
2436
2437 /* Open the index (this will throw an error if it is not an index) */
2438 index_rel = index_open(index_oid, AccessShareLock);
2439 index_form = index_rel->rd_index;
2440
2441 /* Check that it does not have an associated constraint already */
2442 if (OidIsValid(get_index_constraint(index_oid)))
2443 ereport(ERROR,
2444 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2445 errmsg("index \"%s\" is already associated with a constraint",
2446 index_name),
2447 parser_errposition(cxt->pstate, constraint->location)));
2448
2449 /* Perform validity checks on the index */
2450 if (index_form->indrelid != RelationGetRelid(heap_rel))
2451 ereport(ERROR,
2452 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2453 errmsg("index \"%s\" does not belong to table \"%s\"",
2454 index_name, RelationGetRelationName(heap_rel)),
2455 parser_errposition(cxt->pstate, constraint->location)));
2456
2457 if (!index_form->indisvalid)
2458 ereport(ERROR,
2459 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
2460 errmsg("index \"%s\" is not valid", index_name),
2461 parser_errposition(cxt->pstate, constraint->location)));
2462
2463 /*
2464 * Today we forbid non-unique indexes, but we could permit GiST
2465 * indexes whose last entry is a range type and use that to create a
2466 * WITHOUT OVERLAPS constraint (i.e. a temporal constraint).
2467 */
2468 if (!index_form->indisunique)
2469 ereport(ERROR,
2470 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2471 errmsg("\"%s\" is not a unique index", index_name),
2472 errdetail("Cannot create a primary key or unique constraint using such an index."),
2473 parser_errposition(cxt->pstate, constraint->location)));
2474
2475 if (RelationGetIndexExpressions(index_rel) != NIL)
2476 ereport(ERROR,
2477 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2478 errmsg("index \"%s\" contains expressions", index_name),
2479 errdetail("Cannot create a primary key or unique constraint using such an index."),
2480 parser_errposition(cxt->pstate, constraint->location)));
2481
2482 if (RelationGetIndexPredicate(index_rel) != NIL)
2483 ereport(ERROR,
2484 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2485 errmsg("\"%s\" is a partial index", index_name),
2486 errdetail("Cannot create a primary key or unique constraint using such an index."),
2487 parser_errposition(cxt->pstate, constraint->location)));
2488
2489 /*
2490 * It's probably unsafe to change a deferred index to non-deferred. (A
2491 * non-constraint index couldn't be deferred anyway, so this case
2492 * should never occur; no need to sweat, but let's check it.)
2493 */
2494 if (!index_form->indimmediate && !constraint->deferrable)
2495 ereport(ERROR,
2496 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2497 errmsg("\"%s\" is a deferrable index", index_name),
2498 errdetail("Cannot create a non-deferrable constraint using a deferrable index."),
2499 parser_errposition(cxt->pstate, constraint->location)));
2500
2501 /*
2502 * Insist on it being a btree. We must have an index that exactly
2503 * matches what you'd get from plain ADD CONSTRAINT syntax, else dump
2504 * and reload will produce a different index (breaking pg_upgrade in
2505 * particular).
2506 */
2507 if (index_rel->rd_rel->relam != get_index_am_oid(DEFAULT_INDEX_TYPE, false))
2508 ereport(ERROR,
2509 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2510 errmsg("index \"%s\" is not a btree", index_name),
2511 parser_errposition(cxt->pstate, constraint->location)));
2512
2513 /* Must get indclass the hard way */
2514 indclassDatum = SysCacheGetAttrNotNull(INDEXRELID,
2515 index_rel->rd_indextuple,
2516 Anum_pg_index_indclass);
2517 indclass = (oidvector *) DatumGetPointer(indclassDatum);
2518
2519 for (i = 0; i < index_form->indnatts; i++)
2520 {
2521 int16 attnum = index_form->indkey.values[i];
2522 const FormData_pg_attribute *attform;
2523 char *attname;
2524 Oid defopclass;
2525
2526 /*
2527 * We shouldn't see attnum == 0 here, since we already rejected
2528 * expression indexes. If we do, SystemAttributeDefinition will
2529 * throw an error.
2530 */
2531 if (attnum > 0)
2532 {
2533 Assert(attnum <= heap_rel->rd_att->natts);
2534 attform = TupleDescAttr(heap_rel->rd_att, attnum - 1);
2535 }
2536 else
2537 attform = SystemAttributeDefinition(attnum);
2538 attname = pstrdup(NameStr(attform->attname));
2539
2540 if (i < index_form->indnkeyatts)
2541 {
2542 /*
2543 * Insist on default opclass, collation, and sort options.
2544 * While the index would still work as a constraint with
2545 * non-default settings, it might not provide exactly the same
2546 * uniqueness semantics as you'd get from a normally-created
2547 * constraint; and there's also the dump/reload problem
2548 * mentioned above.
2549 */
2550 Datum attoptions =
2551 get_attoptions(RelationGetRelid(index_rel), i + 1);
2552
2553 defopclass = GetDefaultOpClass(attform->atttypid,
2554 index_rel->rd_rel->relam);
2555 if (indclass->values[i] != defopclass ||
2556 attform->attcollation != index_rel->rd_indcollation[i] ||
2557 attoptions != (Datum) 0 ||
2558 index_rel->rd_indoption[i] != 0)
2559 ereport(ERROR,
2560 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2561 errmsg("index \"%s\" column number %d does not have default sorting behavior", index_name, i + 1),
2562 errdetail("Cannot create a primary key or unique constraint using such an index."),
2563 parser_errposition(cxt->pstate, constraint->location)));
2564
2565 /* If a PK, ensure the columns get not null constraints */
2566 if (constraint->contype == CONSTR_PRIMARY)
2567 cxt->nnconstraints =
2568 lappend(cxt->nnconstraints,
2569 makeNotNullConstraint(makeString(attname)));
2570
2571 constraint->keys = lappend(constraint->keys, makeString(attname));
2572 }
2573 else
2574 constraint->including = lappend(constraint->including, makeString(attname));
2575 }
2576
2577 /* Close the index relation but keep the lock */
2578 index_close(index_rel, NoLock);
2579
2580 index->indexOid = index_oid;
2581 }
2582
2583 /*
2584 * If it's an EXCLUDE constraint, the grammar returns a list of pairs of
2585 * IndexElems and operator names. We have to break that apart into
2586 * separate lists.
2587 */
2588 if (constraint->contype == CONSTR_EXCLUSION)
2589 {
2590 foreach(lc, constraint->exclusions)
2591 {
2592 List *pair = (List *) lfirst(lc);
2593 IndexElem *elem;
2594 List *opname;
2595
2596 Assert(list_length(pair) == 2);
2597 elem = linitial_node(IndexElem, pair);
2598 opname = lsecond_node(List, pair);
2599
2600 index->indexParams = lappend(index->indexParams, elem);
2601 index->excludeOpNames = lappend(index->excludeOpNames, opname);
2602 }
2603 }
2604
2605 /*
2606 * For UNIQUE and PRIMARY KEY, we just have a list of column names.
2607 *
2608 * Make sure referenced keys exist. If we are making a PRIMARY KEY index,
2609 * also make sure they are not-null. For WITHOUT OVERLAPS constraints, we
2610 * make sure the last part is a range or multirange.
2611 */
2612 else
2613 {
2614 foreach(lc, constraint->keys)
2615 {
2616 char *key = strVal(lfirst(lc));
2617 bool found = false;
2618 ColumnDef *column = NULL;
2619 ListCell *columns;
2620 IndexElem *iparam;
2621 Oid typid = InvalidOid;
2622
2623 /* Make sure referenced column exists. */
2624 foreach(columns, cxt->columns)
2625 {
2626 column = lfirst_node(ColumnDef, columns);
2627 if (strcmp(column->colname, key) == 0)
2628 {
2629 found = true;
2630 break;
2631 }
2632 }
2633 if (!found)
2634 column = NULL;
2635
2636 if (found)
2637 {
2638 /*
2639 * column is defined in the new table. For CREATE TABLE with
2640 * a PRIMARY KEY, we can apply the not-null constraint cheaply
2641 * here. If the not-null constraint already exists, we can
2642 * (albeit not so cheaply) verify that it's not a NO INHERIT
2643 * constraint.
2644 *
2645 * Note that ALTER TABLE never needs either check, because
2646 * those constraints have already been added by
2647 * ATPrepAddPrimaryKey.
2648 */
2649 if (constraint->contype == CONSTR_PRIMARY &&
2650 !cxt->isalter)
2651 {
2652 if (column->is_not_null)
2653 {
2654 foreach_node(Constraint, nn, cxt->nnconstraints)
2655 {
2656 if (strcmp(strVal(linitial(nn->keys)), key) == 0)
2657 {
2658 if (nn->is_no_inherit)
2659 ereport(ERROR,
2660 errcode(ERRCODE_SYNTAX_ERROR),
2661 errmsg("conflicting NO INHERIT declaration for not-null constraint on column \"%s\"",
2662 key));
2663 break;
2664 }
2665 }
2666 }
2667 else
2668 {
2669 column->is_not_null = true;
2670 cxt->nnconstraints =
2671 lappend(cxt->nnconstraints,
2672 makeNotNullConstraint(makeString(key)));
2673 }
2674 }
2675 else if (constraint->contype == CONSTR_PRIMARY)
2676 Assert(column->is_not_null);
2677 }
2678 else if (SystemAttributeByName(key) != NULL)
2679 {
2680 /*
2681 * column will be a system column in the new table, so accept
2682 * it. System columns can't ever be null, so no need to worry
2683 * about PRIMARY/NOT NULL constraint.
2684 */
2685 found = true;
2686 }
2687 else if (cxt->inhRelations)
2688 {
2689 /* try inherited tables */
2690 ListCell *inher;
2691
2692 foreach(inher, cxt->inhRelations)
2693 {
2694 RangeVar *inh = lfirst_node(RangeVar, inher);
2695 Relation rel;
2696 int count;
2697
2698 rel = table_openrv(inh, AccessShareLock);
2699 /* check user requested inheritance from valid relkind */
2700 if (rel->rd_rel->relkind != RELKIND_RELATION &&
2701 rel->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
2702 rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
2703 ereport(ERROR,
2704 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2705 errmsg("inherited relation \"%s\" is not a table or foreign table",
2706 inh->relname)));
2707 for (count = 0; count < rel->rd_att->natts; count++)
2708 {
2709 Form_pg_attribute inhattr = TupleDescAttr(rel->rd_att,
2710 count);
2711 char *inhname = NameStr(inhattr->attname);
2712
2713 if (inhattr->attisdropped)
2714 continue;
2715 if (strcmp(key, inhname) == 0)
2716 {
2717 found = true;
2718 typid = inhattr->atttypid;
2719
2720 if (constraint->contype == CONSTR_PRIMARY)
2721 cxt->nnconstraints =
2722 lappend(cxt->nnconstraints,
2723 makeNotNullConstraint(makeString(pstrdup(inhname))));
2724 break;
2725 }
2726 }
2727 table_close(rel, NoLock);
2728 if (found)
2729 break;
2730 }
2731 }
2732
2733 /*
2734 * In the ALTER TABLE case, don't complain about index keys not
2735 * created in the command; they may well exist already.
2736 * DefineIndex will complain about them if not.
2737 */
2738 if (!found && !cxt->isalter)
2739 ereport(ERROR,
2740 (errcode(ERRCODE_UNDEFINED_COLUMN),
2741 errmsg("column \"%s\" named in key does not exist", key),
2742 parser_errposition(cxt->pstate, constraint->location)));
2743
2744 /* Check for PRIMARY KEY(foo, foo) */
2745 foreach(columns, index->indexParams)
2746 {
2747 iparam = (IndexElem *) lfirst(columns);
2748 if (iparam->name && strcmp(key, iparam->name) == 0)
2749 {
2750 if (index->primary)
2751 ereport(ERROR,
2752 (errcode(ERRCODE_DUPLICATE_COLUMN),
2753 errmsg("column \"%s\" appears twice in primary key constraint",
2754 key),
2755 parser_errposition(cxt->pstate, constraint->location)));
2756 else
2757 ereport(ERROR,
2758 (errcode(ERRCODE_DUPLICATE_COLUMN),
2759 errmsg("column \"%s\" appears twice in unique constraint",
2760 key),
2761 parser_errposition(cxt->pstate, constraint->location)));
2762 }
2763 }
2764
2765 /*
2766 * The WITHOUT OVERLAPS part (if any) must be a range or
2767 * multirange type, or a domain over such a type.
2768 */
2769 if (constraint->without_overlaps && lc == list_last_cell(constraint->keys))
2770 {
2771 if (!found && cxt->isalter)
2772 {
2773 /*
2774 * Look up the column type on existing table. If we can't
2775 * find it, let things fail in DefineIndex.
2776 */
2777 Relation rel = cxt->rel;
2778
2779 for (int i = 0; i < rel->rd_att->natts; i++)
2780 {
2781 Form_pg_attribute attr = TupleDescAttr(rel->rd_att, i);
2782 const char *attname;
2783
2784 if (attr->attisdropped)
2785 continue;
2786 attname = NameStr(attr->attname);
2787 if (strcmp(attname, key) == 0)
2788 {
2789 found = true;
2790 typid = attr->atttypid;
2791 break;
2792 }
2793 }
2794 }
2795 if (found)
2796 {
2797 /* Look up column type if we didn't already */
2798 if (!OidIsValid(typid) && column)
2799 typid = typenameTypeId(cxt->pstate,
2800 column->typeName);
2801 /* Look through any domain */
2802 if (OidIsValid(typid))
2803 typid = getBaseType(typid);
2804 /* Complain if not range/multirange */
2805 if (!OidIsValid(typid) ||
2806 !(type_is_range(typid) || type_is_multirange(typid)))
2807 ereport(ERROR,
2808 (errcode(ERRCODE_DATATYPE_MISMATCH),
2809 errmsg("column \"%s\" in WITHOUT OVERLAPS is not a range or multirange type", key),
2810 parser_errposition(cxt->pstate, constraint->location)));
2811 }
2812 }
2813
2814 /* OK, add it to the index definition */
2815 iparam = makeNode(IndexElem);
2816 iparam->name = pstrdup(key);
2817 iparam->expr = NULL;
2818 iparam->indexcolname = NULL;
2819 iparam->collation = NIL;
2820 iparam->opclass = NIL;
2821 iparam->opclassopts = NIL;
2822 iparam->ordering = SORTBY_DEFAULT;
2823 iparam->nulls_ordering = SORTBY_NULLS_DEFAULT;
2824 iparam->location = -1;
2825 index->indexParams = lappend(index->indexParams, iparam);
2826 }
2827
2828 if (constraint->without_overlaps)
2829 {
2830 /*
2831 * This enforces that there is at least one equality column
2832 * besides the WITHOUT OVERLAPS columns. This is per SQL
2833 * standard. XXX Do we need this?
2834 */
2835 if (list_length(constraint->keys) < 2)
2836 ereport(ERROR,
2837 errcode(ERRCODE_SYNTAX_ERROR),
2838 errmsg("constraint using WITHOUT OVERLAPS needs at least two columns"));
2839
2840 /* WITHOUT OVERLAPS requires a GiST index */
2841 index->accessMethod = "gist";
2842 }
2843
2844 }
2845
2846 /*
2847 * Add included columns to index definition. This is much like the
2848 * simple-column-name-list code above, except that we don't worry about
2849 * NOT NULL marking; included columns in a primary key should not be
2850 * forced NOT NULL. We don't complain about duplicate columns, either,
2851 * though maybe we should?
2852 */
2853 foreach(lc, constraint->including)
2854 {
2855 char *key = strVal(lfirst(lc));
2856 bool found = false;
2857 ColumnDef *column = NULL;
2858 ListCell *columns;
2859 IndexElem *iparam;
2860
2861 foreach(columns, cxt->columns)
2862 {
2863 column = lfirst_node(ColumnDef, columns);
2864 if (strcmp(column->colname, key) == 0)
2865 {
2866 found = true;
2867 break;
2868 }
2869 }
2870
2871 if (!found)
2872 {
2873 if (SystemAttributeByName(key) != NULL)
2874 {
2875 /*
2876 * column will be a system column in the new table, so accept
2877 * it.
2878 */
2879 found = true;
2880 }
2881 else if (cxt->inhRelations)
2882 {
2883 /* try inherited tables */
2884 ListCell *inher;
2885
2886 foreach(inher, cxt->inhRelations)
2887 {
2888 RangeVar *inh = lfirst_node(RangeVar, inher);
2889 Relation rel;
2890 int count;
2891
2892 rel = table_openrv(inh, AccessShareLock);
2893 /* check user requested inheritance from valid relkind */
2894 if (rel->rd_rel->relkind != RELKIND_RELATION &&
2895 rel->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
2896 rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
2897 ereport(ERROR,
2898 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2899 errmsg("inherited relation \"%s\" is not a table or foreign table",
2900 inh->relname)));
2901 for (count = 0; count < rel->rd_att->natts; count++)
2902 {
2903 Form_pg_attribute inhattr = TupleDescAttr(rel->rd_att,
2904 count);
2905 char *inhname = NameStr(inhattr->attname);
2906
2907 if (inhattr->attisdropped)
2908 continue;
2909 if (strcmp(key, inhname) == 0)
2910 {
2911 found = true;
2912 break;
2913 }
2914 }
2915 table_close(rel, NoLock);
2916 if (found)
2917 break;
2918 }
2919 }
2920 }
2921
2922 /*
2923 * In the ALTER TABLE case, don't complain about index keys not
2924 * created in the command; they may well exist already. DefineIndex
2925 * will complain about them if not.
2926 */
2927 if (!found && !cxt->isalter)
2928 ereport(ERROR,
2929 (errcode(ERRCODE_UNDEFINED_COLUMN),
2930 errmsg("column \"%s\" named in key does not exist", key),
2931 parser_errposition(cxt->pstate, constraint->location)));
2932
2933 /* OK, add it to the index definition */
2934 iparam = makeNode(IndexElem);
2935 iparam->name = pstrdup(key);
2936 iparam->expr = NULL;
2937 iparam->indexcolname = NULL;
2938 iparam->collation = NIL;
2939 iparam->opclass = NIL;
2940 iparam->opclassopts = NIL;
2941 iparam->location = -1;
2942 index->indexIncludingParams = lappend(index->indexIncludingParams, iparam);
2943 }
2944
2945 return index;
2946}
2947
2948/*
2949 * transformCheckConstraints
2950 * handle CHECK constraints
2951 *
2952 * Right now, there's nothing to do here when called from ALTER TABLE,
2953 * but the other constraint-transformation functions are called in both
2954 * the CREATE TABLE and ALTER TABLE paths, so do the same here, and just
2955 * don't do anything if we're not authorized to skip validation.
2956 */
2957static void
2958transformCheckConstraints(CreateStmtContext *cxt, bool skipValidation)
2959{
2960 ListCell *ckclist;
2961
2962 if (cxt->ckconstraints == NIL)
2963 return;
2964
2965 /*
2966 * When creating a new table (but not a foreign table), we can safely skip
2967 * the validation of check constraints and mark them as valid based on the
2968 * constraint enforcement flag, since NOT ENFORCED constraints must always
2969 * be marked as NOT VALID. (This will override any user-supplied NOT VALID
2970 * flag.)
2971 */
2972 if (skipValidation)
2973 {
2974 foreach(ckclist, cxt->ckconstraints)
2975 {
2976 Constraint *constraint = (Constraint *) lfirst(ckclist);
2977
2978 constraint->skip_validation = true;
2979 constraint->initially_valid = constraint->is_enforced;
2980 }
2981 }
2982}
2983
2984/*
2985 * transformFKConstraints
2986 * handle FOREIGN KEY constraints
2987 */
2988static void
2989transformFKConstraints(CreateStmtContext *cxt,
2990 bool skipValidation, bool isAddConstraint)
2991{
2992 ListCell *fkclist;
2993
2994 if (cxt->fkconstraints == NIL)
2995 return;
2996
2997 /*
2998 * If CREATE TABLE or adding a column with NULL default, we can safely
2999 * skip validation of FK constraints, and mark them as valid based on the
3000 * constraint enforcement flag, since NOT ENFORCED constraints must always
3001 * be marked as NOT VALID. (This will override any user-supplied NOT VALID
3002 * flag.)
3003 */
3004 if (skipValidation)
3005 {
3006 foreach(fkclist, cxt->fkconstraints)
3007 {
3008 Constraint *constraint = (Constraint *) lfirst(fkclist);
3009
3010 constraint->skip_validation = true;
3011 constraint->initially_valid = constraint->is_enforced;
3012 }
3013 }
3014
3015 /*
3016 * For CREATE TABLE or ALTER TABLE ADD COLUMN, gin up an ALTER TABLE ADD
3017 * CONSTRAINT command to execute after the basic command is complete. (If
3018 * called from ADD CONSTRAINT, that routine will add the FK constraints to
3019 * its own subcommand list.)
3020 *
3021 * Note: the ADD CONSTRAINT command must also execute after any index
3022 * creation commands. Thus, this should run after
3023 * transformIndexConstraints, so that the CREATE INDEX commands are
3024 * already in cxt->alist. See also the handling of cxt->likeclauses.
3025 */
3026 if (!isAddConstraint)
3027 {
3028 AlterTableStmt *alterstmt = makeNode(AlterTableStmt);
3029
3030 alterstmt->relation = cxt->relation;
3031 alterstmt->cmds = NIL;
3032 alterstmt->objtype = OBJECT_TABLE;
3033
3034 foreach(fkclist, cxt->fkconstraints)
3035 {
3036 Constraint *constraint = (Constraint *) lfirst(fkclist);
3037 AlterTableCmd *altercmd = makeNode(AlterTableCmd);
3038
3039 altercmd->subtype = AT_AddConstraint;
3040 altercmd->name = NULL;
3041 altercmd->def = (Node *) constraint;
3042 alterstmt->cmds = lappend(alterstmt->cmds, altercmd);
3043 }
3044
3045 cxt->alist = lappend(cxt->alist, alterstmt);
3046 }
3047}
3048
3049/*
3050 * transformIndexStmt - parse analysis for CREATE INDEX and ALTER TABLE
3051 *
3052 * Note: this is a no-op for an index not using either index expressions or
3053 * a predicate expression. There are several code paths that create indexes
3054 * without bothering to call this, because they know they don't have any
3055 * such expressions to deal with.
3056 *
3057 * To avoid race conditions, it's important that this function rely only on
3058 * the passed-in relid (and not on stmt->relation) to determine the target
3059 * relation.
3060 */
3061IndexStmt *
3062transformIndexStmt(Oid relid, IndexStmt *stmt, const char *queryString)
3063{
3064 ParseState *pstate;
3065 ParseNamespaceItem *nsitem;
3066 ListCell *l;
3067 Relation rel;
3068
3069 /* Nothing to do if statement already transformed. */
3070 if (stmt->transformed)
3071 return stmt;
3072
3073 /* Set up pstate */
3074 pstate = make_parsestate(NULL);
3075 pstate->p_sourcetext = queryString;
3076
3077 /*
3078 * Put the parent table into the rtable so that the expressions can refer
3079 * to its fields without qualification. Caller is responsible for locking
3080 * relation, but we still need to open it.
3081 */
3082 rel = relation_open(relid, NoLock);
3083 nsitem = addRangeTableEntryForRelation(pstate, rel,
3084 AccessShareLock,
3085 NULL, false, true);
3086
3087 /* no to join list, yes to namespaces */
3088 addNSItemToQuery(pstate, nsitem, false, true, true);
3089
3090 /* take care of the where clause */
3091 if (stmt->whereClause)
3092 {
3093 stmt->whereClause = transformWhereClause(pstate,
3094 stmt->whereClause,
3095 EXPR_KIND_INDEX_PREDICATE,
3096 "WHERE");
3097 /* we have to fix its collations too */
3098 assign_expr_collations(pstate, stmt->whereClause);
3099 }
3100
3101 /* take care of any index expressions */
3102 foreach(l, stmt->indexParams)
3103 {
3104 IndexElem *ielem = (IndexElem *) lfirst(l);
3105
3106 if (ielem->expr)
3107 {
3108 /* Extract preliminary index col name before transforming expr */
3109 if (ielem->indexcolname == NULL)
3110 ielem->indexcolname = FigureIndexColname(ielem->expr);
3111
3112 /* Now do parse transformation of the expression */
3113 ielem->expr = transformExpr(pstate, ielem->expr,
3114 EXPR_KIND_INDEX_EXPRESSION);
3115
3116 /* We have to fix its collations too */
3117 assign_expr_collations(pstate, ielem->expr);
3118
3119 /*
3120 * transformExpr() should have already rejected subqueries,
3121 * aggregates, window functions, and SRFs, based on the EXPR_KIND_
3122 * for an index expression.
3123 *
3124 * DefineIndex() will make more checks.
3125 */
3126 }
3127 }
3128
3129 /*
3130 * Check that only the base rel is mentioned. (This should be dead code
3131 * now that add_missing_from is history.)
3132 */
3133 if (list_length(pstate->p_rtable) != 1)
3134 ereport(ERROR,
3135 (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
3136 errmsg("index expressions and predicates can refer only to the table being indexed")));
3137
3138 free_parsestate(pstate);
3139
3140 /* Close relation */
3141 table_close(rel, NoLock);
3142
3143 /* Mark statement as successfully transformed */
3144 stmt->transformed = true;
3145
3146 return stmt;
3147}
3148
3149/*
3150 * transformStatsStmt - parse analysis for CREATE STATISTICS
3151 *
3152 * To avoid race conditions, it's important that this function relies only on
3153 * the passed-in relid (and not on stmt->relation) to determine the target
3154 * relation.
3155 */
3156CreateStatsStmt *
3157transformStatsStmt(Oid relid, CreateStatsStmt *stmt, const char *queryString)
3158{
3159 ParseState *pstate;
3160 ParseNamespaceItem *nsitem;
3161 ListCell *l;
3162 Relation rel;
3163
3164 /* Nothing to do if statement already transformed. */
3165 if (stmt->transformed)
3166 return stmt;
3167
3168 /* Set up pstate */
3169 pstate = make_parsestate(NULL);
3170 pstate->p_sourcetext = queryString;
3171
3172 /*
3173 * Put the parent table into the rtable so that the expressions can refer
3174 * to its fields without qualification. Caller is responsible for locking
3175 * relation, but we still need to open it.
3176 */
3177 rel = relation_open(relid, NoLock);
3178 nsitem = addRangeTableEntryForRelation(pstate, rel,
3179 AccessShareLock,
3180 NULL, false, true);
3181
3182 /* no to join list, yes to namespaces */
3183 addNSItemToQuery(pstate, nsitem, false, true, true);
3184
3185 /* take care of any expressions */
3186 foreach(l, stmt->exprs)
3187 {
3188 StatsElem *selem = (StatsElem *) lfirst(l);
3189
3190 if (selem->expr)
3191 {
3192 /* Now do parse transformation of the expression */
3193 selem->expr = transformExpr(pstate, selem->expr,
3194 EXPR_KIND_STATS_EXPRESSION);
3195
3196 /* We have to fix its collations too */
3197 assign_expr_collations(pstate, selem->expr);
3198 }
3199 }
3200
3201 /*
3202 * Check that only the base rel is mentioned. (This should be dead code
3203 * now that add_missing_from is history.)
3204 */
3205 if (list_length(pstate->p_rtable) != 1)
3206 ereport(ERROR,
3207 (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
3208 errmsg("statistics expressions can refer only to the table being referenced")));
3209
3210 free_parsestate(pstate);
3211
3212 /* Close relation */
3213 table_close(rel, NoLock);
3214
3215 /* Mark statement as successfully transformed */
3216 stmt->transformed = true;
3217
3218 return stmt;
3219}
3220
3221
3222/*
3223 * transformRuleStmt -
3224 * transform a CREATE RULE Statement. The action is a list of parse
3225 * trees which is transformed into a list of query trees, and we also
3226 * transform the WHERE clause if any.
3227 *
3228 * actions and whereClause are output parameters that receive the
3229 * transformed results.
3230 */
3231void
3232transformRuleStmt(RuleStmt *stmt, const char *queryString,
3233 List **actions, Node **whereClause)
3234{
3235 Relation rel;
3236 ParseState *pstate;
3237 ParseNamespaceItem *oldnsitem;
3238 ParseNamespaceItem *newnsitem;
3239
3240 /*
3241 * To avoid deadlock, make sure the first thing we do is grab
3242 * AccessExclusiveLock on the target relation. This will be needed by
3243 * DefineQueryRewrite(), and we don't want to grab a lesser lock
3244 * beforehand.
3245 */
3246 rel = table_openrv(stmt->relation, AccessExclusiveLock);
3247
3248 if (rel->rd_rel->relkind == RELKIND_MATVIEW)
3249 ereport(ERROR,
3250 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3251 errmsg("rules on materialized views are not supported")));
3252
3253 /* Set up pstate */
3254 pstate = make_parsestate(NULL);
3255 pstate->p_sourcetext = queryString;
3256
3257 /*
3258 * NOTE: 'OLD' must always have a varno equal to 1 and 'NEW' equal to 2.
3259 * Set up their ParseNamespaceItems in the main pstate for use in parsing
3260 * the rule qualification.
3261 */
3262 oldnsitem = addRangeTableEntryForRelation(pstate, rel,
3263 AccessShareLock,
3264 makeAlias("old", NIL),
3265 false, false);
3266 newnsitem = addRangeTableEntryForRelation(pstate, rel,
3267 AccessShareLock,
3268 makeAlias("new", NIL),
3269 false, false);
3270
3271 /*
3272 * They must be in the namespace too for lookup purposes, but only add the
3273 * one(s) that are relevant for the current kind of rule. In an UPDATE
3274 * rule, quals must refer to OLD.field or NEW.field to be unambiguous, but
3275 * there's no need to be so picky for INSERT & DELETE. We do not add them
3276 * to the joinlist.
3277 */
3278 switch (stmt->event)
3279 {
3280 case CMD_SELECT:
3281 addNSItemToQuery(pstate, oldnsitem, false, true, true);
3282 break;
3283 case CMD_UPDATE:
3284 addNSItemToQuery(pstate, oldnsitem, false, true, true);
3285 addNSItemToQuery(pstate, newnsitem, false, true, true);
3286 break;
3287 case CMD_INSERT:
3288 addNSItemToQuery(pstate, newnsitem, false, true, true);
3289 break;
3290 case CMD_DELETE:
3291 addNSItemToQuery(pstate, oldnsitem, false, true, true);
3292 break;
3293 default:
3294 elog(ERROR, "unrecognized event type: %d",
3295 (int) stmt->event);
3296 break;
3297 }
3298
3299 /* take care of the where clause */
3300 *whereClause = transformWhereClause(pstate,
3301 stmt->whereClause,
3302 EXPR_KIND_WHERE,
3303 "WHERE");
3304 /* we have to fix its collations too */
3305 assign_expr_collations(pstate, *whereClause);
3306
3307 /* this is probably dead code without add_missing_from: */
3308 if (list_length(pstate->p_rtable) != 2) /* naughty, naughty... */
3309 ereport(ERROR,
3310 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3311 errmsg("rule WHERE condition cannot contain references to other relations")));
3312
3313 /*
3314 * 'instead nothing' rules with a qualification need a query rangetable so
3315 * the rewrite handler can add the negated rule qualification to the
3316 * original query. We create a query with the new command type CMD_NOTHING
3317 * here that is treated specially by the rewrite system.
3318 */
3319 if (stmt->actions == NIL)
3320 {
3321 Query *nothing_qry = makeNode(Query);
3322
3323 nothing_qry->commandType = CMD_NOTHING;
3324 nothing_qry->rtable = pstate->p_rtable;
3325 nothing_qry->rteperminfos = pstate->p_rteperminfos;
3326 nothing_qry->jointree = makeFromExpr(NIL, NULL); /* no join wanted */
3327
3328 *actions = list_make1(nothing_qry);
3329 }
3330 else
3331 {
3332 ListCell *l;
3333 List *newactions = NIL;
3334
3335 /*
3336 * transform each statement, like parse_sub_analyze()
3337 */
3338 foreach(l, stmt->actions)
3339 {
3340 Node *action = (Node *) lfirst(l);
3341 ParseState *sub_pstate = make_parsestate(NULL);
3342 Query *sub_qry,
3343 *top_subqry;
3344 bool has_old,
3345 has_new;
3346
3347 /*
3348 * Since outer ParseState isn't parent of inner, have to pass down
3349 * the query text by hand.
3350 */
3351 sub_pstate->p_sourcetext = queryString;
3352
3353 /*
3354 * Set up OLD/NEW in the rtable for this statement. The entries
3355 * are added only to relnamespace, not varnamespace, because we
3356 * don't want them to be referred to by unqualified field names
3357 * nor "*" in the rule actions. We decide later whether to put
3358 * them in the joinlist.
3359 */
3360 oldnsitem = addRangeTableEntryForRelation(sub_pstate, rel,
3361 AccessShareLock,
3362 makeAlias("old", NIL),
3363 false, false);
3364 newnsitem = addRangeTableEntryForRelation(sub_pstate, rel,
3365 AccessShareLock,
3366 makeAlias("new", NIL),
3367 false, false);
3368 addNSItemToQuery(sub_pstate, oldnsitem, false, true, false);
3369 addNSItemToQuery(sub_pstate, newnsitem, false, true, false);
3370
3371 /* Transform the rule action statement */
3372 top_subqry = transformStmt(sub_pstate, action);
3373
3374 /*
3375 * We cannot support utility-statement actions (eg NOTIFY) with
3376 * nonempty rule WHERE conditions, because there's no way to make
3377 * the utility action execute conditionally.
3378 */
3379 if (top_subqry->commandType == CMD_UTILITY &&
3380 *whereClause != NULL)
3381 ereport(ERROR,
3382 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3383 errmsg("rules with WHERE conditions can only have SELECT, INSERT, UPDATE, or DELETE actions")));
3384
3385 /*
3386 * If the action is INSERT...SELECT, OLD/NEW have been pushed down
3387 * into the SELECT, and that's what we need to look at. (Ugly
3388 * kluge ... try to fix this when we redesign querytrees.)
3389 */
3390 sub_qry = getInsertSelectQuery(top_subqry, NULL);
3391
3392 /*
3393 * If the sub_qry is a setop, we cannot attach any qualifications
3394 * to it, because the planner won't notice them. This could
3395 * perhaps be relaxed someday, but for now, we may as well reject
3396 * such a rule immediately.
3397 */
3398 if (sub_qry->setOperations != NULL && *whereClause != NULL)
3399 ereport(ERROR,
3400 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3401 errmsg("conditional UNION/INTERSECT/EXCEPT statements are not implemented")));
3402
3403 /*
3404 * Validate action's use of OLD/NEW, qual too
3405 */
3406 has_old =
3407 rangeTableEntry_used((Node *) sub_qry, PRS2_OLD_VARNO, 0) ||
3408 rangeTableEntry_used(*whereClause, PRS2_OLD_VARNO, 0);
3409 has_new =
3410 rangeTableEntry_used((Node *) sub_qry, PRS2_NEW_VARNO, 0) ||
3411 rangeTableEntry_used(*whereClause, PRS2_NEW_VARNO, 0);
3412
3413 switch (stmt->event)
3414 {
3415 case CMD_SELECT:
3416 if (has_old)
3417 ereport(ERROR,
3418 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3419 errmsg("ON SELECT rule cannot use OLD")));
3420 if (has_new)
3421 ereport(ERROR,
3422 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3423 errmsg("ON SELECT rule cannot use NEW")));
3424 break;
3425 case CMD_UPDATE:
3426 /* both are OK */
3427 break;
3428 case CMD_INSERT:
3429 if (has_old)
3430 ereport(ERROR,
3431 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3432 errmsg("ON INSERT rule cannot use OLD")));
3433 break;
3434 case CMD_DELETE:
3435 if (has_new)
3436 ereport(ERROR,
3437 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3438 errmsg("ON DELETE rule cannot use NEW")));
3439 break;
3440 default:
3441 elog(ERROR, "unrecognized event type: %d",
3442 (int) stmt->event);
3443 break;
3444 }
3445
3446 /*
3447 * OLD/NEW are not allowed in WITH queries, because they would
3448 * amount to outer references for the WITH, which we disallow.
3449 * However, they were already in the outer rangetable when we
3450 * analyzed the query, so we have to check.
3451 *
3452 * Note that in the INSERT...SELECT case, we need to examine the
3453 * CTE lists of both top_subqry and sub_qry.
3454 *
3455 * Note that we aren't digging into the body of the query looking
3456 * for WITHs in nested sub-SELECTs. A WITH down there can
3457 * legitimately refer to OLD/NEW, because it'd be an
3458 * indirect-correlated outer reference.
3459 */
3460 if (rangeTableEntry_used((Node *) top_subqry->cteList,
3461 PRS2_OLD_VARNO, 0) ||
3462 rangeTableEntry_used((Node *) sub_qry->cteList,
3463 PRS2_OLD_VARNO, 0))
3464 ereport(ERROR,
3465 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3466 errmsg("cannot refer to OLD within WITH query")));
3467 if (rangeTableEntry_used((Node *) top_subqry->cteList,
3468 PRS2_NEW_VARNO, 0) ||
3469 rangeTableEntry_used((Node *) sub_qry->cteList,
3470 PRS2_NEW_VARNO, 0))
3471 ereport(ERROR,
3472 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3473 errmsg("cannot refer to NEW within WITH query")));
3474
3475 /*
3476 * For efficiency's sake, add OLD to the rule action's jointree
3477 * only if it was actually referenced in the statement or qual.
3478 *
3479 * For INSERT, NEW is not really a relation (only a reference to
3480 * the to-be-inserted tuple) and should never be added to the
3481 * jointree.
3482 *
3483 * For UPDATE, we treat NEW as being another kind of reference to
3484 * OLD, because it represents references to *transformed* tuples
3485 * of the existing relation. It would be wrong to enter NEW
3486 * separately in the jointree, since that would cause a double
3487 * join of the updated relation. It's also wrong to fail to make
3488 * a jointree entry if only NEW and not OLD is mentioned.
3489 */
3490 if (has_old || (has_new && stmt->event == CMD_UPDATE))
3491 {
3492 RangeTblRef *rtr;
3493
3494 /*
3495 * If sub_qry is a setop, manipulating its jointree will do no
3496 * good at all, because the jointree is dummy. (This should be
3497 * a can't-happen case because of prior tests.)
3498 */
3499 if (sub_qry->setOperations != NULL)
3500 ereport(ERROR,
3501 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3502 errmsg("conditional UNION/INTERSECT/EXCEPT statements are not implemented")));
3503 /* hackishly add OLD to the already-built FROM clause */
3504 rtr = makeNode(RangeTblRef);
3505 rtr->rtindex = oldnsitem->p_rtindex;
3506 sub_qry->jointree->fromlist =
3507 lappend(sub_qry->jointree->fromlist, rtr);
3508 }
3509
3510 newactions = lappend(newactions, top_subqry);
3511
3512 free_parsestate(sub_pstate);
3513 }
3514
3515 *actions = newactions;
3516 }
3517
3518 free_parsestate(pstate);
3519
3520 /* Close relation, but keep the exclusive lock */
3521 table_close(rel, NoLock);
3522}
3523
3524
3525/*
3526 * checkPartition
3527 * Check whether partRelOid is a leaf partition of the parent table (rel).
3528 * isMerge: true indicates the operation is "ALTER TABLE ... MERGE PARTITIONS";
3529 * false indicates the operation is "ALTER TABLE ... SPLIT PARTITION".
3530 */
3531static void
3532checkPartition(Relation rel, Oid partRelOid, bool isMerge)
3533{
3534 Relation partRel;
3535
3536 partRel = table_open(partRelOid, NoLock);
3537
3538 if (partRel->rd_rel->relkind != RELKIND_RELATION)
3539 ereport(ERROR,
3540 errcode(ERRCODE_WRONG_OBJECT_TYPE),
3541 errmsg("\"%s\" is not a table", RelationGetRelationName(partRel)),
3542 isMerge
3543 ? errhint("ALTER TABLE ... MERGE PARTITIONS can only merge partitions don't have sub-partitions.")
3544 : errhint("ALTER TABLE ... SPLIT PARTITION can only split partitions don't have sub-partitions."));
3545
3546 if (!partRel->rd_rel->relispartition)
3547 ereport(ERROR,
3548 errcode(ERRCODE_WRONG_OBJECT_TYPE),
3549 errmsg("\"%s\" is not a partition of partitioned table \"%s\"",
3550 RelationGetRelationName(partRel), RelationGetRelationName(rel)),
3551 isMerge
3552 ? errhint("ALTER TABLE ... MERGE PARTITIONS can only merge partitions don't have sub-partitions.")
3553 : errhint("ALTER TABLE ... SPLIT PARTITION can only split partitions don't have sub-partitions."));
3554
3555 if (get_partition_parent(partRelOid, false) != RelationGetRelid(rel))
3556 ereport(ERROR,
3557 errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
3558 errmsg("relation \"%s\" is not a partition of relation \"%s\"",
3559 RelationGetRelationName(partRel), RelationGetRelationName(rel)),
3560 isMerge
3561 ? errhint("ALTER TABLE ... MERGE PARTITIONS can only merge partitions don't have sub-partitions.")
3562 : errhint("ALTER TABLE ... SPLIT PARTITION can only split partitions don't have sub-partitions."));
3563
3564 table_close(partRel, NoLock);
3565}
3566
3567/*
3568 * transformPartitionCmdForSplit -
3569 * analyze the ALTER TABLE ... SPLIT PARTITION command
3570 *
3571 * For each new partition, sps->bound is set to the transformed value of bound.
3572 * Does checks for bounds of new partitions.
3573 */
3574static void
3575transformPartitionCmdForSplit(CreateStmtContext *cxt, PartitionCmd *partcmd)
3576{
3577 Relation parent = cxt->rel;
3578 PartitionKey key;
3579 char strategy;
3580 Oid splitPartOid;
3581 Oid defaultPartOid;
3582 int default_index = -1;
3583 bool isSplitPartDefault;
3584 ListCell *listptr,
3585 *listptr2;
3586 List *splitlist;
3587
3588 splitlist = partcmd->partlist;
3589 key = RelationGetPartitionKey(parent);
3590 strategy = get_partition_strategy(key);
3591 defaultPartOid = get_default_oid_from_partdesc(RelationGetPartitionDesc(parent, true));
3592
3593 /* Transform partition bounds for all partitions in the list: */
3594 foreach_node(SinglePartitionSpec, sps, splitlist)
3595 {
3596 cxt->partbound = NULL;
3597 transformPartitionCmd(cxt, sps->bound);
3598 /* Assign the transformed value of the partition bound. */
3599 sps->bound = cxt->partbound;
3600 }
3601
3602 /*
3603 * Open and lock the partition, check ownership along the way. We need to
3604 * use AccessExclusiveLock here because this split partition will be
3605 * detached, then dropped in ATExecSplitPartition.
3606 */
3607 splitPartOid = RangeVarGetRelidExtended(partcmd->name, AccessExclusiveLock,
3608 0, RangeVarCallbackOwnsRelation,
3609 NULL);
3610
3611 checkPartition(parent, splitPartOid, false);
3612
3613 switch (strategy)
3614 {
3615 case PARTITION_STRATEGY_LIST:
3616 case PARTITION_STRATEGY_RANGE:
3617 {
3618 foreach_node(SinglePartitionSpec, sps, splitlist)
3619 {
3620 if (sps->bound->is_default)
3621 {
3622 if (default_index != -1)
3623 ereport(ERROR,
3624 errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3625 errmsg("DEFAULT partition should be one"),
3626 parser_errposition(cxt->pstate, sps->name->location));
3627
3628 default_index = foreach_current_index(sps);
3629 }
3630 }
3631 }
3632 break;
3633
3634 case PARTITION_STRATEGY_HASH:
3635 ereport(ERROR,
3636 errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3637 errmsg("partition of hash-partitioned table cannot be split"));
3638 break;
3639
3640 default:
3641 elog(ERROR, "unexpected partition strategy: %d",
3642 (int) key->strategy);
3643 break;
3644 }
3645
3646 /* isSplitPartDefault: is the being split partition a DEFAULT partition? */
3647 isSplitPartDefault = (defaultPartOid == splitPartOid);
3648
3649 if (isSplitPartDefault && default_index == -1)
3650 ereport(ERROR,
3651 errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3652 errmsg("can not split DEFAULT partition \"%s\"",
3653 get_rel_name(splitPartOid)),
3654 errhint("To split DEFAULT partition one of the new partition must be DEFAULT."),
3655 parser_errposition(cxt->pstate, ((SinglePartitionSpec *) linitial(splitlist))->name->location));
3656
3657 /*
3658 * If the partition being split is not the DEFAULT partition, but the
3659 * DEFAULT partition exists, then none of the resulting split partitions
3660 * can be the DEFAULT.
3661 */
3662 if (!isSplitPartDefault && (default_index != -1) && OidIsValid(defaultPartOid))
3663 {
3664 SinglePartitionSpec *spsDef =
3665 (SinglePartitionSpec *) list_nth(splitlist, default_index);
3666
3667 ereport(ERROR,
3668 errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3669 errmsg("can not split non-DEFAULT partition \"%s\"",
3670 get_rel_name(splitPartOid)),
3671 errmsg("new partition cannot be DEFAULT because DEFAULT partition \"%s\" already exists",
3672 get_rel_name(defaultPartOid)),
3673 parser_errposition(cxt->pstate, spsDef->name->location));
3674 }
3675
3676 foreach(listptr, splitlist)
3677 {
3678 Oid nspid;
3679 SinglePartitionSpec *sps = (SinglePartitionSpec *) lfirst(listptr);
3680 RangeVar *name = sps->name;
3681
3682 nspid = RangeVarGetCreationNamespace(sps->name);
3683
3684 /* Partitions in the list should have different names. */
3685 for_each_cell(listptr2, splitlist, lnext(splitlist, listptr))
3686 {
3687 Oid nspid2;
3688 SinglePartitionSpec *sps2 = (SinglePartitionSpec *) lfirst(listptr2);
3689 RangeVar *name2 = sps2->name;
3690
3691 if (equal(name, name2))
3692 ereport(ERROR,
3693 errcode(ERRCODE_DUPLICATE_TABLE),
3694 errmsg("partition with name \"%s\" is already used", name->relname),
3695 parser_errposition(cxt->pstate, name2->location));
3696
3697 nspid2 = RangeVarGetCreationNamespace(sps2->name);
3698
3699 if (nspid2 == nspid && strcmp(name->relname, name2->relname) == 0)
3700 ereport(ERROR,
3701 errcode(ERRCODE_DUPLICATE_TABLE),
3702 errmsg("partition with name \"%s\" is already used", name->relname),
3703 parser_errposition(cxt->pstate, name2->location));
3704 }
3705 }
3706
3707 /* Then we should check partitions with transformed bounds. */
3708 check_partitions_for_split(parent, splitPartOid, splitlist, cxt->pstate);
3709}
3710
3711
3712/*
3713 * transformPartitionCmdForMerge -
3714 * analyze the ALTER TABLE ... MERGE PARTITIONS command
3715 *
3716 * Does simple checks for merged partitions. Calculates bound of the resulting
3717 * partition.
3718 */
3719static void
3720transformPartitionCmdForMerge(CreateStmtContext *cxt, PartitionCmd *partcmd)
3721{
3722 Oid defaultPartOid;
3723 Oid partOid;
3724 Relation parent = cxt->rel;
3725 PartitionKey key;
3726 char strategy;
3727 ListCell *listptr,
3728 *listptr2;
3729 bool isDefaultPart = false;
3730 List *partOids = NIL;
3731
3732 key = RelationGetPartitionKey(parent);
3733 strategy = get_partition_strategy(key);
3734
3735 if (strategy == PARTITION_STRATEGY_HASH)
3736 ereport(ERROR,
3737 errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3738 errmsg("partition of hash-partitioned table cannot be merged"));
3739
3740 /* Does the partitioned table (parent) have a default partition? */
3741 defaultPartOid = get_default_oid_from_partdesc(RelationGetPartitionDesc(parent, true));
3742
3743 foreach(listptr, partcmd->partlist)
3744 {
3745 RangeVar *name = (RangeVar *) lfirst(listptr);
3746
3747 /* Partitions in the list should have different names. */
3748 for_each_cell(listptr2, partcmd->partlist, lnext(partcmd->partlist, listptr))
3749 {
3750 RangeVar *name2 = (RangeVar *) lfirst(listptr2);
3751
3752 if (equal(name, name2))
3753 ereport(ERROR,
3754 errcode(ERRCODE_DUPLICATE_TABLE),
3755 errmsg("partition with name \"%s\" is already used", name->relname),
3756 parser_errposition(cxt->pstate, name2->location));
3757 }
3758
3759 /*
3760 * Search the DEFAULT partition in the list. Open and lock partitions
3761 * before calculating the boundary for resulting partition, we also
3762 * check for ownership along the way. We need to use
3763 * AccessExclusiveLock here, because these merged partitions will be
3764 * detached and then dropped in ATExecMergePartitions.
3765 */
3766 partOid = RangeVarGetRelidExtended(name, AccessExclusiveLock, 0,
3767 RangeVarCallbackOwnsRelation,
3768 NULL);
3769 /* Is the current partition a DEFAULT partition? */
3770 if (partOid == defaultPartOid)
3771 isDefaultPart = true;
3772
3773 /*
3774 * Extended check because the same partition can have different names
3775 * (for example, "part_name" and "public.part_name").
3776 */
3777 foreach(listptr2, partOids)
3778 {
3779 Oid curOid = lfirst_oid(listptr2);
3780
3781 if (curOid == partOid)
3782 ereport(ERROR,
3783 errcode(ERRCODE_DUPLICATE_TABLE),
3784 errmsg("partition with name \"%s\" is already used", name->relname),
3785 parser_errposition(cxt->pstate, name->location));
3786 }
3787
3788 checkPartition(parent, partOid, true);
3789
3790 partOids = lappend_oid(partOids, partOid);
3791 }
3792
3793 /* Allocate the bound of the resulting partition. */
3794 Assert(partcmd->bound == NULL);
3795 partcmd->bound = makeNode(PartitionBoundSpec);
3796
3797 /* Fill the partition bound. */
3798 partcmd->bound->strategy = strategy;
3799 partcmd->bound->location = -1;
3800 partcmd->bound->is_default = isDefaultPart;
3801 if (!isDefaultPart)
3802 calculate_partition_bound_for_merge(parent, partcmd->partlist,
3803 partOids, partcmd->bound,
3804 cxt->pstate);
3805}
3806
3807/*
3808 * transformAlterTableStmt -
3809 * parse analysis for ALTER TABLE
3810 *
3811 * Returns the transformed AlterTableStmt. There may be additional actions
3812 * to be done before and after the transformed statement, which are returned
3813 * in *beforeStmts and *afterStmts as lists of utility command parsetrees.
3814 *
3815 * To avoid race conditions, it's important that this function rely only on
3816 * the passed-in relid (and not on stmt->relation) to determine the target
3817 * relation.
3818 */
3819AlterTableStmt *
3820transformAlterTableStmt(Oid relid, AlterTableStmt *stmt,
3821 const char *queryString,
3822 List **beforeStmts, List **afterStmts)
3823{
3824 Relation rel;
3825 TupleDesc tupdesc;
3826 ParseState *pstate;
3827 CreateStmtContext cxt;
3828 List *save_alist;
3829 ListCell *lcmd,
3830 *l;
3831 List *newcmds = NIL;
3832 bool skipValidation = true;
3833 AlterTableCmd *newcmd;
3834 ParseNamespaceItem *nsitem;
3835
3836 /* Caller is responsible for locking the relation */
3837 rel = relation_open(relid, NoLock);
3838 tupdesc = RelationGetDescr(rel);
3839
3840 /* Set up pstate */
3841 pstate = make_parsestate(NULL);
3842 pstate->p_sourcetext = queryString;
3843 nsitem = addRangeTableEntryForRelation(pstate,
3844 rel,
3845 AccessShareLock,
3846 NULL,
3847 false,
3848 true);
3849 addNSItemToQuery(pstate, nsitem, false, true, true);
3850
3851 /* Set up CreateStmtContext */
3852 cxt.pstate = pstate;
3853 if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
3854 {
3855 cxt.stmtType = "ALTER FOREIGN TABLE";
3856 cxt.isforeign = true;
3857 }
3858 else
3859 {
3860 cxt.stmtType = "ALTER TABLE";
3861 cxt.isforeign = false;
3862 }
3863 cxt.relation = stmt->relation;
3864 cxt.rel = rel;
3865 cxt.inhRelations = NIL;
3866 cxt.isalter = true;
3867 cxt.columns = NIL;
3868 cxt.ckconstraints = NIL;
3869 cxt.nnconstraints = NIL;
3870 cxt.fkconstraints = NIL;
3871 cxt.ixconstraints = NIL;
3872 cxt.likeclauses = NIL;
3873 cxt.blist = NIL;
3874 cxt.alist = NIL;
3875 cxt.pkey = NULL;
3876 cxt.ispartitioned = (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE);
3877 cxt.partbound = NULL;
3878 cxt.ofType = false;
3879
3880 /*
3881 * Transform ALTER subcommands that need it (most don't). These largely
3882 * re-use code from CREATE TABLE.
3883 */
3884 foreach(lcmd, stmt->cmds)
3885 {
3886 AlterTableCmd *cmd = (AlterTableCmd *) lfirst(lcmd);
3887
3888 switch (cmd->subtype)
3889 {
3890 case AT_AddColumn:
3891 {
3892 ColumnDef *def = castNode(ColumnDef, cmd->def);
3893
3894 transformColumnDefinition(&cxt, def);
3895
3896 /*
3897 * If the column has a non-null default, we can't skip
3898 * validation of foreign keys.
3899 */
3900 if (def->raw_default != NULL)
3901 skipValidation = false;
3902
3903 /*
3904 * All constraints are processed in other ways. Remove the
3905 * original list
3906 */
3907 def->constraints = NIL;
3908
3909 newcmds = lappend(newcmds, cmd);
3910 break;
3911 }
3912
3913 case AT_AddConstraint:
3914
3915 /*
3916 * The original AddConstraint cmd node doesn't go to newcmds
3917 */
3918 if (IsA(cmd->def, Constraint))
3919 {
3920 transformTableConstraint(&cxt, (Constraint *) cmd->def);
3921 if (((Constraint *) cmd->def)->contype == CONSTR_FOREIGN)
3922 skipValidation = false;
3923 }
3924 else
3925 elog(ERROR, "unrecognized node type: %d",
3926 (int) nodeTag(cmd->def));
3927 break;
3928
3929 case AT_AlterColumnType:
3930 {
3931 ColumnDef *def = castNode(ColumnDef, cmd->def);
3932 AttrNumber attnum;
3933
3934 /*
3935 * For ALTER COLUMN TYPE, transform the USING clause if
3936 * one was specified.
3937 */
3938 if (def->raw_default)
3939 {
3940 def->cooked_default =
3941 transformExpr(pstate, def->raw_default,
3942 EXPR_KIND_ALTER_COL_TRANSFORM);
3943 }
3944
3945 /*
3946 * For identity column, create ALTER SEQUENCE command to
3947 * change the data type of the sequence. Identity sequence
3948 * is associated with the top level partitioned table.
3949 * Hence ignore partitions.
3950 */
3951 if (!RelationGetForm(rel)->relispartition)
3952 {
3953 attnum = get_attnum(relid, cmd->name);
3954 if (attnum == InvalidAttrNumber)
3955 ereport(ERROR,
3956 (errcode(ERRCODE_UNDEFINED_COLUMN),
3957 errmsg("column \"%s\" of relation \"%s\" does not exist",
3958 cmd->name, RelationGetRelationName(rel))));
3959
3960 if (attnum > 0 &&
3961 TupleDescAttr(tupdesc, attnum - 1)->attidentity)
3962 {
3963 Oid seq_relid = getIdentitySequence(rel, attnum, false);
3964 Oid typeOid = typenameTypeId(pstate, def->typeName);
3965 AlterSeqStmt *altseqstmt = makeNode(AlterSeqStmt);
3966
3967 altseqstmt->sequence
3968 = makeRangeVar(get_namespace_name(get_rel_namespace(seq_relid)),
3969 get_rel_name(seq_relid),
3970 -1);
3971 altseqstmt->options = list_make1(makeDefElem("as",
3972 (Node *) makeTypeNameFromOid(typeOid, -1),
3973 -1));
3974 altseqstmt->for_identity = true;
3975 cxt.blist = lappend(cxt.blist, altseqstmt);
3976 }
3977 }
3978
3979 newcmds = lappend(newcmds, cmd);
3980 break;
3981 }
3982
3983 case AT_AddIdentity:
3984 {
3985 Constraint *def = castNode(Constraint, cmd->def);
3986 ColumnDef *newdef = makeNode(ColumnDef);
3987 AttrNumber attnum;
3988
3989 newdef->colname = cmd->name;
3990 newdef->identity = def->generated_when;
3991 cmd->def = (Node *) newdef;
3992
3993 attnum = get_attnum(relid, cmd->name);
3994 if (attnum == InvalidAttrNumber)
3995 ereport(ERROR,
3996 (errcode(ERRCODE_UNDEFINED_COLUMN),
3997 errmsg("column \"%s\" of relation \"%s\" does not exist",
3998 cmd->name, RelationGetRelationName(rel))));
3999
4000 generateSerialExtraStmts(&cxt, newdef,
4001 get_atttype(relid, attnum),
4002 def->options, true, true,
4003 NULL, NULL);
4004
4005 newcmds = lappend(newcmds, cmd);
4006 break;
4007 }
4008
4009 case AT_SetIdentity:
4010 {
4011 /*
4012 * Create an ALTER SEQUENCE statement for the internal
4013 * sequence of the identity column.
4014 */
4015 ListCell *lc;
4016 List *newseqopts = NIL;
4017 List *newdef = NIL;
4018 AttrNumber attnum;
4019 Oid seq_relid;
4020
4021 /*
4022 * Split options into those handled by ALTER SEQUENCE and
4023 * those for ALTER TABLE proper.
4024 */
4025 foreach(lc, castNode(List, cmd->def))
4026 {
4027 DefElem *def = lfirst_node(DefElem, lc);
4028
4029 if (strcmp(def->defname, "generated") == 0)
4030 newdef = lappend(newdef, def);
4031 else
4032 newseqopts = lappend(newseqopts, def);
4033 }
4034
4035 attnum = get_attnum(relid, cmd->name);
4036 if (attnum == InvalidAttrNumber)
4037 ereport(ERROR,
4038 (errcode(ERRCODE_UNDEFINED_COLUMN),
4039 errmsg("column \"%s\" of relation \"%s\" does not exist",
4040 cmd->name, RelationGetRelationName(rel))));
4041
4042 seq_relid = getIdentitySequence(rel, attnum, true);
4043
4044 if (seq_relid)
4045 {
4046 AlterSeqStmt *seqstmt;
4047
4048 seqstmt = makeNode(AlterSeqStmt);
4049 seqstmt->sequence = makeRangeVar(get_namespace_name(get_rel_namespace(seq_relid)),
4050 get_rel_name(seq_relid), -1);
4051 seqstmt->options = newseqopts;
4052 seqstmt->for_identity = true;
4053 seqstmt->missing_ok = false;
4054
4055 cxt.blist = lappend(cxt.blist, seqstmt);
4056 }
4057
4058 /*
4059 * If column was not an identity column, we just let the
4060 * ALTER TABLE command error out later. (There are cases
4061 * this fails to cover, but we'll need to restructure
4062 * where creation of the sequence dependency linkage
4063 * happens before we can fix it.)
4064 */
4065
4066 cmd->def = (Node *) newdef;
4067 newcmds = lappend(newcmds, cmd);
4068 break;
4069 }
4070
4071 case AT_AttachPartition:
4072 case AT_DetachPartition:
4073 {
4074 PartitionCmd *partcmd = (PartitionCmd *) cmd->def;
4075
4076 transformPartitionCmd(&cxt, partcmd->bound);
4077 /* assign the transformed value of the partition bound */
4078 partcmd->bound = cxt.partbound;
4079 }
4080
4081 newcmds = lappend(newcmds, cmd);
4082 break;
4083
4084 case AT_MergePartitions:
4085 {
4086 PartitionCmd *partcmd = (PartitionCmd *) cmd->def;
4087
4088 if (list_length(partcmd->partlist) < 2)
4089 ereport(ERROR,
4090 errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
4091 errmsg("list of partitions to be merged should include at least two partitions"));
4092
4093 transformPartitionCmdForMerge(&cxt, partcmd);
4094 newcmds = lappend(newcmds, cmd);
4095 break;
4096 }
4097
4098 case AT_SplitPartition:
4099 {
4100 PartitionCmd *partcmd = (PartitionCmd *) cmd->def;
4101
4102 if (list_length(partcmd->partlist) < 2)
4103 ereport(ERROR,
4104 errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
4105 errmsg("list of new partitions should contain at least two partitions"));
4106
4107 transformPartitionCmdForSplit(&cxt, partcmd);
4108 newcmds = lappend(newcmds, cmd);
4109 break;
4110 }
4111
4112 default:
4113
4114 /*
4115 * Currently, we shouldn't actually get here for the
4116 * subcommand types that don't require transformation; but if
4117 * we do, just emit them unchanged.
4118 */
4119 newcmds = lappend(newcmds, cmd);
4120 break;
4121 }
4122 }
4123
4124 /*
4125 * Transfer anything we already have in cxt.alist into save_alist, to keep
4126 * it separate from the output of transformIndexConstraints.
4127 */
4128 save_alist = cxt.alist;
4129 cxt.alist = NIL;
4130
4131 /* Postprocess constraints */
4132 transformIndexConstraints(&cxt);
4133 transformFKConstraints(&cxt, skipValidation, true);
4134 transformCheckConstraints(&cxt, false);
4135
4136 /*
4137 * Push any index-creation commands into the ALTER, so that they can be
4138 * scheduled nicely by tablecmds.c. Note that tablecmds.c assumes that
4139 * the IndexStmt attached to an AT_AddIndex or AT_AddIndexConstraint
4140 * subcommand has already been through transformIndexStmt.
4141 */
4142 foreach(l, cxt.alist)
4143 {
4144 Node *istmt = (Node *) lfirst(l);
4145
4146 /*
4147 * We assume here that cxt.alist contains only IndexStmts generated
4148 * from primary key constraints.
4149 */
4150 if (IsA(istmt, IndexStmt))
4151 {
4152 IndexStmt *idxstmt = (IndexStmt *) istmt;
4153
4154 idxstmt = transformIndexStmt(relid, idxstmt, queryString);
4155 newcmd = makeNode(AlterTableCmd);
4156 newcmd->subtype = OidIsValid(idxstmt->indexOid) ? AT_AddIndexConstraint : AT_AddIndex;
4157 newcmd->def = (Node *) idxstmt;
4158 newcmds = lappend(newcmds, newcmd);
4159 }
4160 else
4161 elog(ERROR, "unexpected stmt type %d", (int) nodeTag(istmt));
4162 }
4163 cxt.alist = NIL;
4164
4165 /* Append any CHECK, NOT NULL or FK constraints to the commands list */
4166 foreach_node(Constraint, def, cxt.ckconstraints)
4167 {
4168 newcmd = makeNode(AlterTableCmd);
4169 newcmd->subtype = AT_AddConstraint;
4170 newcmd->def = (Node *) def;
4171 newcmds = lappend(newcmds, newcmd);
4172 }
4173 foreach_node(Constraint, def, cxt.nnconstraints)
4174 {
4175 newcmd = makeNode(AlterTableCmd);
4176 newcmd->subtype = AT_AddConstraint;
4177 newcmd->def = (Node *) def;
4178 newcmds = lappend(newcmds, newcmd);
4179 }
4180 foreach_node(Constraint, def, cxt.fkconstraints)
4181 {
4182 newcmd = makeNode(AlterTableCmd);
4183 newcmd->subtype = AT_AddConstraint;
4184 newcmd->def = (Node *) def;
4185 newcmds = lappend(newcmds, newcmd);
4186 }
4187
4188 /* Close rel */
4189 relation_close(rel, NoLock);
4190
4191 /*
4192 * Output results.
4193 */
4194 stmt->cmds = newcmds;
4195
4196 *beforeStmts = cxt.blist;
4197 *afterStmts = list_concat(cxt.alist, save_alist);
4198
4199 return stmt;
4200}
4201
4202
4203/*
4204 * Preprocess a list of column constraint clauses
4205 * to attach constraint attributes to their primary constraint nodes
4206 * and detect inconsistent/misplaced constraint attributes.
4207 *
4208 * NOTE: currently, attributes are only supported for FOREIGN KEY, UNIQUE,
4209 * EXCLUSION, and PRIMARY KEY constraints, but someday they ought to be
4210 * supported for other constraint types.
4211 *
4212 * NOTE: this must be idempotent in non-error cases; see
4213 * transformCreateSchemaCreateTable.
4214 */
4215static void
4216transformConstraintAttrs(ParseState *pstate, List *constraintList)
4217{
4218 Constraint *lastprimarycon = NULL;
4219 bool saw_deferrability = false;
4220 bool saw_initially = false;
4221 bool saw_enforced = false;
4222 ListCell *clist;
4223
4224#define SUPPORTS_ATTRS(node) \
4225 ((node) != NULL && \
4226 ((node)->contype == CONSTR_PRIMARY || \
4227 (node)->contype == CONSTR_UNIQUE || \
4228 (node)->contype == CONSTR_EXCLUSION || \
4229 (node)->contype == CONSTR_FOREIGN))
4230
4231 foreach(clist, constraintList)
4232 {
4233 Constraint *con = (Constraint *) lfirst(clist);
4234
4235 if (!IsA(con, Constraint))
4236 elog(ERROR, "unrecognized node type: %d",
4237 (int) nodeTag(con));
4238 switch (con->contype)
4239 {
4240 case CONSTR_ATTR_DEFERRABLE:
4241 if (!SUPPORTS_ATTRS(lastprimarycon))
4242 ereport(ERROR,
4243 (errcode(ERRCODE_SYNTAX_ERROR),
4244 errmsg("misplaced DEFERRABLE clause"),
4245 parser_errposition(pstate, con->location)));
4246 if (saw_deferrability)
4247 ereport(ERROR,
4248 (errcode(ERRCODE_SYNTAX_ERROR),
4249 errmsg("multiple DEFERRABLE/NOT DEFERRABLE clauses not allowed"),
4250 parser_errposition(pstate, con->location)));
4251 saw_deferrability = true;
4252 lastprimarycon->deferrable = true;
4253 break;
4254
4255 case CONSTR_ATTR_NOT_DEFERRABLE:
4256 if (!SUPPORTS_ATTRS(lastprimarycon))
4257 ereport(ERROR,
4258 (errcode(ERRCODE_SYNTAX_ERROR),
4259 errmsg("misplaced NOT DEFERRABLE clause"),
4260 parser_errposition(pstate, con->location)));
4261 if (saw_deferrability)
4262 ereport(ERROR,
4263 (errcode(ERRCODE_SYNTAX_ERROR),
4264 errmsg("multiple DEFERRABLE/NOT DEFERRABLE clauses not allowed"),
4265 parser_errposition(pstate, con->location)));
4266 saw_deferrability = true;
4267 lastprimarycon->deferrable = false;
4268 if (saw_initially &&
4269 lastprimarycon->initdeferred)
4270 ereport(ERROR,
4271 (errcode(ERRCODE_SYNTAX_ERROR),
4272 errmsg("constraint declared INITIALLY DEFERRED must be DEFERRABLE"),
4273 parser_errposition(pstate, con->location)));
4274 break;
4275
4276 case CONSTR_ATTR_DEFERRED:
4277 if (!SUPPORTS_ATTRS(lastprimarycon))
4278 ereport(ERROR,
4279 (errcode(ERRCODE_SYNTAX_ERROR),
4280 errmsg("misplaced INITIALLY DEFERRED clause"),
4281 parser_errposition(pstate, con->location)));
4282 if (saw_initially)
4283 ereport(ERROR,
4284 (errcode(ERRCODE_SYNTAX_ERROR),
4285 errmsg("multiple INITIALLY IMMEDIATE/DEFERRED clauses not allowed"),
4286 parser_errposition(pstate, con->location)));
4287 saw_initially = true;
4288 lastprimarycon->initdeferred = true;
4289
4290 /*
4291 * If only INITIALLY DEFERRED appears, assume DEFERRABLE
4292 */
4293 if (!saw_deferrability)
4294 lastprimarycon->deferrable = true;
4295 else if (!lastprimarycon->deferrable)
4296 ereport(ERROR,
4297 (errcode(ERRCODE_SYNTAX_ERROR),
4298 errmsg("constraint declared INITIALLY DEFERRED must be DEFERRABLE"),
4299 parser_errposition(pstate, con->location)));
4300 break;
4301
4302 case CONSTR_ATTR_IMMEDIATE:
4303 if (!SUPPORTS_ATTRS(lastprimarycon))
4304 ereport(ERROR,
4305 (errcode(ERRCODE_SYNTAX_ERROR),
4306 errmsg("misplaced INITIALLY IMMEDIATE clause"),
4307 parser_errposition(pstate, con->location)));
4308 if (saw_initially)
4309 ereport(ERROR,
4310 (errcode(ERRCODE_SYNTAX_ERROR),
4311 errmsg("multiple INITIALLY IMMEDIATE/DEFERRED clauses not allowed"),
4312 parser_errposition(pstate, con->location)));
4313 saw_initially = true;
4314 lastprimarycon->initdeferred = false;
4315 break;
4316
4317 case CONSTR_ATTR_ENFORCED:
4318 if (lastprimarycon == NULL ||
4319 (lastprimarycon->contype != CONSTR_CHECK &&
4320 lastprimarycon->contype != CONSTR_FOREIGN))
4321 ereport(ERROR,
4322 (errcode(ERRCODE_SYNTAX_ERROR),
4323 errmsg("misplaced ENFORCED clause"),
4324 parser_errposition(pstate, con->location)));
4325 if (saw_enforced)
4326 ereport(ERROR,
4327 (errcode(ERRCODE_SYNTAX_ERROR),
4328 errmsg("multiple ENFORCED/NOT ENFORCED clauses not allowed"),
4329 parser_errposition(pstate, con->location)));
4330 saw_enforced = true;
4331 lastprimarycon->is_enforced = true;
4332 break;
4333
4334 case CONSTR_ATTR_NOT_ENFORCED:
4335 if (lastprimarycon == NULL ||
4336 (lastprimarycon->contype != CONSTR_CHECK &&
4337 lastprimarycon->contype != CONSTR_FOREIGN))
4338 ereport(ERROR,
4339 (errcode(ERRCODE_SYNTAX_ERROR),
4340 errmsg("misplaced NOT ENFORCED clause"),
4341 parser_errposition(pstate, con->location)));
4342 if (saw_enforced)
4343 ereport(ERROR,
4344 (errcode(ERRCODE_SYNTAX_ERROR),
4345 errmsg("multiple ENFORCED/NOT ENFORCED clauses not allowed"),
4346 parser_errposition(pstate, con->location)));
4347 saw_enforced = true;
4348 lastprimarycon->is_enforced = false;
4349
4350 /* A NOT ENFORCED constraint must be marked as invalid. */
4351 lastprimarycon->skip_validation = true;
4352 lastprimarycon->initially_valid = false;
4353 break;
4354
4355 default:
4356 /* Otherwise it's not an attribute */
4357 lastprimarycon = con;
4358 /* reset flags for new primary node */
4359 saw_deferrability = false;
4360 saw_initially = false;
4361 saw_enforced = false;
4362 break;
4363 }
4364 }
4365}
4366
4367/*
4368 * Special handling of type definition for a column
4369 */
4370static void
4371transformColumnType(CreateStmtContext *cxt, ColumnDef *column)
4372{
4373 /*
4374 * All we really need to do here is verify that the type is valid,
4375 * including any collation spec that might be present.
4376 */
4377 Type ctype = typenameType(cxt->pstate, column->typeName, NULL);
4378
4379 if (column->collClause)
4380 {
4381 Form_pg_type typtup = (Form_pg_type) GETSTRUCT(ctype);
4382
4383 LookupCollation(cxt->pstate,
4384 column->collClause->collname,
4385 column->collClause->location);
4386 /* Complain if COLLATE is applied to an uncollatable type */
4387 if (!OidIsValid(typtup->typcollation))
4388 ereport(ERROR,
4389 (errcode(ERRCODE_DATATYPE_MISMATCH),
4390 errmsg("collations are not supported by type %s",
4391 format_type_be(typtup->oid)),
4392 parser_errposition(cxt->pstate,
4393 column->collClause->location)));
4394 }
4395
4396 ReleaseSysCache(ctype);
4397}
4398
4399
4400/*
4401 * transformCreateSchemaStmtElements -
4402 * analyzes the elements of a CREATE SCHEMA statement
4403 *
4404 * This presently has two responsibilities. We verify that no subcommands are
4405 * trying to create objects outside the new schema. We also pull out any
4406 * foreign-key constraint clauses embedded in CREATE TABLE subcommands, and
4407 * convert them to ALTER TABLE ADD CONSTRAINT commands appended to the list.
4408 * This supports forward references in foreign keys, which is required by the
4409 * SQL standard.
4410 *
4411 * We used to try to re-order the commands in a way that would work even if
4412 * the user-written order would not, but that's too hard (perhaps impossible)
4413 * to do correctly with not-yet-parse-analyzed commands. Now we'll just
4414 * execute the elements in the order given, except for foreign keys.
4415 *
4416 * "schemaName" is the name of the schema that will be used for the creation
4417 * of the objects listed. It may be obtained from the schema name defined
4418 * in the statement or a role specification.
4419 *
4420 * The result is a list of parse nodes that still need to be analyzed ---
4421 * but we can't analyze the later commands until we've executed the earlier
4422 * ones, because of possible inter-object references.
4423 *
4424 * Note it's important that we not modify the input data structure. We create
4425 * a new result List, and we copy any CREATE TABLE subcommands that we might
4426 * modify.
4427 */
4428List *
4429transformCreateSchemaStmtElements(ParseState *pstate, List *schemaElts,
4430 const char *schemaName)
4431{
4432 List *elements = NIL;
4433 List *fk_elements = NIL;
4434 ListCell *lc;
4435
4436 /*
4437 * Run through each schema element in the schema element list. Check
4438 * target schema names, and collect the list of actions to be done.
4439 */
4440 foreach(lc, schemaElts)
4441 {
4442 Node *element = lfirst(lc);
4443
4444 switch (nodeTag(element))
4445 {
4446 case T_CreateSeqStmt:
4447 {
4448 CreateSeqStmt *elp = (CreateSeqStmt *) element;
4449
4450 checkSchemaNameRV(pstate, schemaName, elp->sequence);
4451 elements = lappend(elements, element);
4452 }
4453 break;
4454
4455 case T_CreateStmt:
4456 {
4457 CreateStmt *elp = (CreateStmt *) element;
4458
4459 checkSchemaNameRV(pstate, schemaName, elp->relation);
4460 /* Pull out any foreign key clauses, add to fk_elements */
4461 elp = transformCreateSchemaCreateTable(pstate,
4462 elp,
4463 &fk_elements);
4464 elements = lappend(elements, elp);
4465 }
4466 break;
4467
4468 case T_ViewStmt:
4469 {
4470 ViewStmt *elp = (ViewStmt *) element;
4471
4472 checkSchemaNameRV(pstate, schemaName, elp->view);
4473 elements = lappend(elements, element);
4474 }
4475 break;
4476
4477 case T_IndexStmt:
4478 {
4479 IndexStmt *elp = (IndexStmt *) element;
4480
4481 checkSchemaNameRV(pstate, schemaName, elp->relation);
4482 elements = lappend(elements, element);
4483 }
4484 break;
4485
4486 case T_CreateTrigStmt:
4487 {
4488 CreateTrigStmt *elp = (CreateTrigStmt *) element;
4489
4490 checkSchemaNameRV(pstate, schemaName, elp->relation);
4491 elements = lappend(elements, element);
4492 }
4493 break;
4494
4495 case T_CreateDomainStmt:
4496 {
4497 CreateDomainStmt *elp = (CreateDomainStmt *) element;
4498
4499 checkSchemaNameList(schemaName, elp->domainname);
4500 elements = lappend(elements, element);
4501 }
4502 break;
4503
4504 case T_CreateFunctionStmt:
4505 {
4506 CreateFunctionStmt *elp = (CreateFunctionStmt *) element;
4507
4508 checkSchemaNameList(schemaName, elp->funcname);
4509 elements = lappend(elements, element);
4510 }
4511 break;
4512
4513 /*
4514 * CREATE TYPE can produce a DefineStmt, but also
4515 * CreateEnumStmt, CreateRangeStmt, and CompositeTypeStmt.
4516 * Allowing DefineStmt also provides support for several other
4517 * commands: currently, CREATE AGGREGATE, CREATE COLLATION,
4518 * CREATE OPERATOR, and text search objects.
4519 */
4520
4521 case T_DefineStmt:
4522 {
4523 DefineStmt *elp = (DefineStmt *) element;
4524
4525 checkSchemaNameList(schemaName, elp->defnames);
4526 elements = lappend(elements, element);
4527 }
4528 break;
4529
4530 case T_CreateEnumStmt:
4531 {
4532 CreateEnumStmt *elp = (CreateEnumStmt *) element;
4533
4534 checkSchemaNameList(schemaName, elp->typeName);
4535 elements = lappend(elements, element);
4536 }
4537 break;
4538
4539 case T_CreateRangeStmt:
4540 {
4541 CreateRangeStmt *elp = (CreateRangeStmt *) element;
4542
4543 checkSchemaNameList(schemaName, elp->typeName);
4544 elements = lappend(elements, element);
4545 }
4546 break;
4547
4548 case T_CompositeTypeStmt:
4549 {
4550 CompositeTypeStmt *elp = (CompositeTypeStmt *) element;
4551
4552 checkSchemaNameRV(pstate, schemaName, elp->typevar);
4553 elements = lappend(elements, element);
4554 }
4555 break;
4556
4557 case T_GrantStmt:
4558 elements = lappend(elements, element);
4559 break;
4560
4561 default:
4562 elog(ERROR, "unrecognized node type: %d",
4563 (int) nodeTag(element));
4564 }
4565 }
4566
4567 return list_concat(elements, fk_elements);
4568}
4569
4570/*
4571 * checkSchemaNameRV
4572 * Check schema name in an element of a CREATE SCHEMA command,
4573 * where the element's name is given by a RangeVar
4574 *
4575 * It's okay if the command doesn't specify a target schema name, because
4576 * CreateSchemaCommand will set up the default creation schema to be the
4577 * new schema. But if a target schema name is given, it had better match.
4578 * We also have to check that the command doesn't say CREATE TEMP, since
4579 * that would likewise put the object into the wrong schema.
4580 */
4581static void
4582checkSchemaNameRV(ParseState *pstate, const char *context_schema,
4583 RangeVar *relation)
4584{
4585 if (relation->schemaname != NULL &&
4586 strcmp(context_schema, relation->schemaname) != 0)
4587 ereport(ERROR,
4588 (errcode(ERRCODE_INVALID_SCHEMA_DEFINITION),
4589 errmsg("CREATE specifies a schema (%s) "
4590 "different from the one being created (%s)",
4591 relation->schemaname, context_schema),
4592 parser_errposition(pstate, relation->location)));
4593
4594 if (relation->relpersistence == RELPERSISTENCE_TEMP)
4595 {
4596 /* spell this error the same as in RangeVarAdjustRelationPersistence */
4597 ereport(ERROR,
4598 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4599 errmsg("cannot create temporary relation in non-temporary schema"),
4600 parser_errposition(pstate, relation->location)));
4601 }
4602}
4603
4604/*
4605 * checkSchemaNameList
4606 * Check schema name in an element of a CREATE SCHEMA command,
4607 * where the element's name is given by a List
4608 *
4609 * Much as above, but we don't have to worry about TEMP.
4610 * Sadly, this also means we don't have a parse location to report.
4611 */
4612static void
4613checkSchemaNameList(const char *context_schema, List *qualified_name)
4614{
4615 char *obj_schema;
4616 char *obj_name;
4617
4618 DeconstructQualifiedName(qualified_name, &obj_schema, &obj_name);
4619 if (obj_schema != NULL &&
4620 strcmp(context_schema, obj_schema) != 0)
4621 ereport(ERROR,
4622 (errcode(ERRCODE_INVALID_SCHEMA_DEFINITION),
4623 errmsg("CREATE specifies a schema (%s) "
4624 "different from the one being created (%s)",
4625 obj_schema, context_schema)));
4626}
4627
4628/*
4629 * transformCreateSchemaCreateTable
4630 * Process one CreateStmt for transformCreateSchemaStmtElements.
4631 *
4632 * We remove any foreign-key clauses in the statement and convert them into
4633 * ALTER TABLE commands, which we append to *fk_elements.
4634 */
4635static CreateStmt *
4636transformCreateSchemaCreateTable(ParseState *pstate,
4637 CreateStmt *stmt,
4638 List **fk_elements)
4639{
4640 CreateStmt *newstmt;
4641 List *newElts = NIL;
4642 ListCell *lc;
4643
4644 /*
4645 * Flat-copy the CreateStmt node, allowing us to replace its tableElts
4646 * list without damaging the input data structure. Most sub-nodes will be
4647 * shared with the input, though.
4648 */
4649 newstmt = makeNode(CreateStmt);
4650 memcpy(newstmt, stmt, sizeof(CreateStmt));
4651
4652 /* Scan for foreign-key constraints */
4653 foreach(lc, stmt->tableElts)
4654 {
4655 Node *element = lfirst(lc);
4656 AlterTableStmt *alterstmt;
4657 AlterTableCmd *altercmd;
4658
4659 if (IsA(element, Constraint))
4660 {
4661 Constraint *constr = (Constraint *) element;
4662
4663 if (constr->contype != CONSTR_FOREIGN)
4664 {
4665 /* Other constraint types pass through unchanged */
4666 newElts = lappend(newElts, constr);
4667 continue;
4668 }
4669
4670 /* Make it into an ALTER TABLE ADD CONSTRAINT command */
4671 altercmd = makeNode(AlterTableCmd);
4672 altercmd->subtype = AT_AddConstraint;
4673 altercmd->name = NULL;
4674 altercmd->def = (Node *) copyObject(constr);
4675
4676 alterstmt = makeNode(AlterTableStmt);
4677 alterstmt->relation = copyObject(stmt->relation);
4678 alterstmt->cmds = list_make1(altercmd);
4679 alterstmt->objtype = OBJECT_TABLE;
4680
4681 *fk_elements = lappend(*fk_elements, alterstmt);
4682 }
4683 else if (IsA(element, ColumnDef))
4684 {
4685 ColumnDef *entry = (ColumnDef *) element;
4686 ColumnDef *newentry;
4687 List *entryconstraints;
4688 bool afterFK = false;
4689
4690 /*
4691 * We must preprocess the list of column constraints to attach
4692 * attributes such as DEFERRED to the appropriate constraint node.
4693 * Do this on a copy. (But execution of the CreateStmt will run
4694 * transformConstraintAttrs on the copy, so we are nonetheless
4695 * relying on transformConstraintAttrs to be idempotent.)
4696 */
4697 entryconstraints = copyObject(entry->constraints);
4698 transformConstraintAttrs(pstate, entryconstraints);
4699
4700 /* Scan the column constraints ... */
4701 foreach_node(Constraint, colconstr, entryconstraints)
4702 {
4703 switch (colconstr->contype)
4704 {
4705 case CONSTR_FOREIGN:
4706 /* colconstr is already a copy, OK to modify */
4707 colconstr->fk_attrs = list_make1(makeString(entry->colname));
4708
4709 /* Make it into an ALTER TABLE ADD CONSTRAINT command */
4710 altercmd = makeNode(AlterTableCmd);
4711 altercmd->subtype = AT_AddConstraint;
4712 altercmd->name = NULL;
4713 altercmd->def = (Node *) colconstr;
4714
4715 alterstmt = makeNode(AlterTableStmt);
4716 alterstmt->relation = copyObject(stmt->relation);
4717 alterstmt->cmds = list_make1(altercmd);
4718 alterstmt->objtype = OBJECT_TABLE;
4719
4720 *fk_elements = lappend(*fk_elements, alterstmt);
4721
4722 /* Remove the Constraint node from entryconstraints */
4723 entryconstraints =
4724 foreach_delete_current(entryconstraints, colconstr);
4725
4726 /*
4727 * Immediately-following attribute constraints should
4728 * be dropped, too.
4729 */
4730 afterFK = true;
4731 break;
4732
4733 /*
4734 * Column constraint lists separate a Constraint node
4735 * from its attributes (e.g. NOT ENFORCED); so a
4736 * column-level foreign key constraint may be
4737 * represented by multiple Constraint nodes. After
4738 * transformConstraintAttrs, the foreign key
4739 * Constraint node contains all required information,
4740 * making it okay to put into *fk_elements as a
4741 * stand-alone Constraint. But since we removed the
4742 * foreign key Constraint node from entryconstraints,
4743 * we must remove any dependent attribute nodes too,
4744 * else the later re-execution of
4745 * transformConstraintAttrs will misbehave.
4746 */
4747 case CONSTR_ATTR_DEFERRABLE:
4748 case CONSTR_ATTR_NOT_DEFERRABLE:
4749 case CONSTR_ATTR_DEFERRED:
4750 case CONSTR_ATTR_IMMEDIATE:
4751 case CONSTR_ATTR_ENFORCED:
4752 case CONSTR_ATTR_NOT_ENFORCED:
4753 if (afterFK)
4754 entryconstraints =
4755 foreach_delete_current(entryconstraints,
4756 colconstr);
4757 break;
4758
4759 default:
4760 /* Any following constraint attributes are unrelated */
4761 afterFK = false;
4762 break;
4763 }
4764 }
4765
4766 /* Now make a modified ColumnDef to put into newElts */
4767 newentry = makeNode(ColumnDef);
4768 memcpy(newentry, entry, sizeof(ColumnDef));
4769 newentry->constraints = entryconstraints;
4770 newElts = lappend(newElts, newentry);
4771 }
4772 else
4773 {
4774 /* Other node types pass through unchanged */
4775 newElts = lappend(newElts, element);
4776 }
4777 }
4778
4779 newstmt->tableElts = newElts;
4780 return newstmt;
4781}
4782
4783/*
4784 * transformPartitionCmd
4785 * Analyze the ATTACH/DETACH/SPLIT PARTITION command
4786 *
4787 * In case of the ATTACH/SPLIT PARTITION command, cxt->partbound is set to the
4788 * transformed value of bound.
4789 */
4790static void
4791transformPartitionCmd(CreateStmtContext *cxt, PartitionBoundSpec *bound)
4792{
4793 Relation parentRel = cxt->rel;
4794
4795 switch (parentRel->rd_rel->relkind)
4796 {
4797 case RELKIND_PARTITIONED_TABLE:
4798 /* transform the partition bound, if any */
4799 Assert(RelationGetPartitionKey(parentRel) != NULL);
4800 if (bound != NULL)
4801 cxt->partbound = transformPartitionBound(cxt->pstate, parentRel,
4802 bound);
4803 break;
4804 case RELKIND_PARTITIONED_INDEX:
4805
4806 /*
4807 * A partitioned index cannot have a partition bound set. ALTER
4808 * INDEX prevents that with its grammar, but not ALTER TABLE.
4809 */
4810 if (bound != NULL)
4811 ereport(ERROR,
4812 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
4813 errmsg("\"%s\" is not a partitioned table",
4814 RelationGetRelationName(parentRel))));
4815 break;
4816 case RELKIND_RELATION:
4817 /* the table must be partitioned */
4818 ereport(ERROR,
4819 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
4820 errmsg("table \"%s\" is not partitioned",
4821 RelationGetRelationName(parentRel))));
4822 break;
4823 case RELKIND_INDEX:
4824 /* the index must be partitioned */
4825 ereport(ERROR,
4826 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
4827 errmsg("index \"%s\" is not partitioned",
4828 RelationGetRelationName(parentRel))));
4829 break;
4830 default:
4831 /* parser shouldn't let this case through */
4832 elog(ERROR, "\"%s\" is not a partitioned table or index",
4833 RelationGetRelationName(parentRel));
4834 break;
4835 }
4836}
4837
4838/*
4839 * transformPartitionBound
4840 *
4841 * Transform a partition bound specification
4842 */
4843PartitionBoundSpec *
4844transformPartitionBound(ParseState *pstate, Relation parent,
4845 PartitionBoundSpec *spec)
4846{
4847 PartitionBoundSpec *result_spec;
4848 PartitionKey key = RelationGetPartitionKey(parent);
4849 char strategy = get_partition_strategy(key);
4850 int partnatts = get_partition_natts(key);
4851 List *partexprs = get_partition_exprs(key);
4852
4853 /* Avoid scribbling on input */
4854 result_spec = copyObject(spec);
4855
4856 if (spec->is_default)
4857 {
4858 /*
4859 * Hash partitioning does not support a default partition; there's no
4860 * use case for it (since the set of partitions to create is perfectly
4861 * defined), and if users do get into it accidentally, it's hard to
4862 * back out from it afterwards.
4863 */
4864 if (strategy == PARTITION_STRATEGY_HASH)
4865 ereport(ERROR,
4866 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4867 errmsg("a hash-partitioned table may not have a default partition")));
4868
4869 /*
4870 * In case of the default partition, parser had no way to identify the
4871 * partition strategy. Assign the parent's strategy to the default
4872 * partition bound spec.
4873 */
4874 result_spec->strategy = strategy;
4875
4876 return result_spec;
4877 }
4878
4879 if (strategy == PARTITION_STRATEGY_HASH)
4880 {
4881 if (spec->strategy != PARTITION_STRATEGY_HASH)
4882 ereport(ERROR,
4883 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4884 errmsg("invalid bound specification for a hash partition"),
4885 parser_errposition(pstate, exprLocation((Node *) spec))));
4886
4887 if (spec->modulus <= 0)
4888 ereport(ERROR,
4889 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4890 errmsg("modulus for hash partition must be an integer value greater than zero")));
4891
4892 Assert(spec->remainder >= 0);
4893
4894 if (spec->remainder >= spec->modulus)
4895 ereport(ERROR,
4896 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4897 errmsg("remainder for hash partition must be less than modulus")));
4898 }
4899 else if (strategy == PARTITION_STRATEGY_LIST)
4900 {
4901 ListCell *cell;
4902 char *colname;
4903 Oid coltype;
4904 int32 coltypmod;
4905 Oid partcollation;
4906
4907 if (spec->strategy != PARTITION_STRATEGY_LIST)
4908 ereport(ERROR,
4909 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4910 errmsg("invalid bound specification for a list partition"),
4911 parser_errposition(pstate, exprLocation((Node *) spec))));
4912
4913 /* Get the only column's name in case we need to output an error */
4914 if (key->partattrs[0] != 0)
4915 colname = get_attname(RelationGetRelid(parent),
4916 key->partattrs[0], false);
4917 else
4918 colname = deparse_expression((Node *) linitial(partexprs),
4919 deparse_context_for(RelationGetRelationName(parent),
4920 RelationGetRelid(parent)),
4921 false, false);
4922 /* Need its type data too */
4923 coltype = get_partition_col_typid(key, 0);
4924 coltypmod = get_partition_col_typmod(key, 0);
4925 partcollation = get_partition_col_collation(key, 0);
4926
4927 result_spec->listdatums = NIL;
4928 foreach(cell, spec->listdatums)
4929 {
4930 Node *expr = lfirst(cell);
4931 Const *value;
4932 ListCell *cell2;
4933 bool duplicate;
4934
4935 value = transformPartitionBoundValue(pstate, expr,
4936 colname, coltype, coltypmod,
4937 partcollation);
4938
4939 /* Don't add to the result if the value is a duplicate */
4940 duplicate = false;
4941 foreach(cell2, result_spec->listdatums)
4942 {
4943 Const *value2 = lfirst_node(Const, cell2);
4944
4945 if (equal(value, value2))
4946 {
4947 duplicate = true;
4948 break;
4949 }
4950 }
4951 if (duplicate)
4952 continue;
4953
4954 result_spec->listdatums = lappend(result_spec->listdatums,
4955 value);
4956 }
4957 }
4958 else if (strategy == PARTITION_STRATEGY_RANGE)
4959 {
4960 if (spec->strategy != PARTITION_STRATEGY_RANGE)
4961 ereport(ERROR,
4962 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4963 errmsg("invalid bound specification for a range partition"),
4964 parser_errposition(pstate, exprLocation((Node *) spec))));
4965
4966 if (list_length(spec->lowerdatums) != partnatts)
4967 ereport(ERROR,
4968 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4969 errmsg("FROM must specify exactly one value per partitioning column")));
4970 if (list_length(spec->upperdatums) != partnatts)
4971 ereport(ERROR,
4972 (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
4973 errmsg("TO must specify exactly one value per partitioning column")));
4974
4975 /*
4976 * Convert raw parse nodes into PartitionRangeDatum nodes and perform
4977 * any necessary validation.
4978 */
4979 result_spec->lowerdatums =
4980 transformPartitionRangeBounds(pstate, spec->lowerdatums,
4981 parent);
4982 result_spec->upperdatums =
4983 transformPartitionRangeBounds(pstate, spec->upperdatums,
4984 parent);
4985 }
4986 else
4987 elog(ERROR, "unexpected partition strategy: %d", (int) strategy);
4988
4989 return result_spec;
4990}
4991
4992/*
4993 * transformPartitionRangeBounds
4994 * This converts the expressions for range partition bounds from the raw
4995 * grammar representation to PartitionRangeDatum structs
4996 */
4997static List *
4998transformPartitionRangeBounds(ParseState *pstate, List *blist,
4999 Relation parent)
5000{
5001 List *result = NIL;
5002 PartitionKey key = RelationGetPartitionKey(parent);
5003 List *partexprs = get_partition_exprs(key);
5004 ListCell *lc;
5005 int i,
5006 j;
5007
5008 j = 0;
5009 foreach(lc, blist)
5010 {
5011 Node *expr = lfirst(lc);
5012 PartitionRangeDatum *prd = NULL;
5013
5014 i = foreach_current_index(lc);
5015
5016 /*
5017 * Infinite range bounds -- "minvalue" and "maxvalue" -- get passed in
5018 * as ColumnRefs.
5019 */
5020 if (IsA(expr, ColumnRef))
5021 {
5022 ColumnRef *cref = (ColumnRef *) expr;
5023 char *cname = NULL;
5024
5025 /*
5026 * There should be a single field named either "minvalue" or
5027 * "maxvalue".
5028 */
5029 if (list_length(cref->fields) == 1 &&
5030 IsA(linitial(cref->fields), String))
5031 cname = strVal(linitial(cref->fields));
5032
5033 if (cname == NULL)
5034 {
5035 /*
5036 * ColumnRef is not in the desired single-field-name form. For
5037 * consistency between all partition strategies, let the
5038 * expression transformation report any errors rather than
5039 * doing it ourselves.
5040 */
5041 }
5042 else if (strcmp("minvalue", cname) == 0)
5043 {
5044 prd = makeNode(PartitionRangeDatum);
5045 prd->kind = PARTITION_RANGE_DATUM_MINVALUE;
5046 prd->value = NULL;
5047 }
5048 else if (strcmp("maxvalue", cname) == 0)
5049 {
5050 prd = makeNode(PartitionRangeDatum);
5051 prd->kind = PARTITION_RANGE_DATUM_MAXVALUE;
5052 prd->value = NULL;
5053 }
5054 }
5055
5056 if (prd == NULL)
5057 {
5058 char *colname;
5059 Oid coltype;
5060 int32 coltypmod;
5061 Oid partcollation;
5062 Const *value;
5063
5064 /* Get the column's name in case we need to output an error */
5065 if (key->partattrs[i] != 0)
5066 colname = get_attname(RelationGetRelid(parent),
5067 key->partattrs[i], false);
5068 else
5069 {
5070 colname = deparse_expression((Node *) list_nth(partexprs, j),
5071 deparse_context_for(RelationGetRelationName(parent),
5072 RelationGetRelid(parent)),
5073 false, false);
5074 ++j;
5075 }
5076
5077 /* Need its type data too */
5078 coltype = get_partition_col_typid(key, i);
5079 coltypmod = get_partition_col_typmod(key, i);
5080 partcollation = get_partition_col_collation(key, i);
5081
5082 value = transformPartitionBoundValue(pstate, expr,
5083 colname,
5084 coltype, coltypmod,
5085 partcollation);
5086 if (value->constisnull)
5087 ereport(ERROR,
5088 (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
5089 errmsg("cannot specify NULL in range bound")));
5090 prd = makeNode(PartitionRangeDatum);
5091 prd->kind = PARTITION_RANGE_DATUM_VALUE;
5092 prd->value = (Node *) value;
5093 }
5094
5095 prd->location = exprLocation(expr);
5096
5097 result = lappend(result, prd);
5098 }
5099
5100 /*
5101 * Once we see MINVALUE or MAXVALUE for one column, the remaining columns
5102 * must be the same.
5103 */
5104 validateInfiniteBounds(pstate, result);
5105
5106 return result;
5107}
5108
5109/*
5110 * validateInfiniteBounds
5111 *
5112 * Check that a MAXVALUE or MINVALUE specification in a partition bound is
5113 * followed only by more of the same.
5114 */
5115static void
5116validateInfiniteBounds(ParseState *pstate, List *blist)
5117{
5118 ListCell *lc;
5119 PartitionRangeDatumKind kind = PARTITION_RANGE_DATUM_VALUE;
5120
5121 foreach(lc, blist)
5122 {
5123 PartitionRangeDatum *prd = lfirst_node(PartitionRangeDatum, lc);
5124
5125 if (kind == prd->kind)
5126 continue;
5127
5128 switch (kind)
5129 {
5130 case PARTITION_RANGE_DATUM_VALUE:
5131 kind = prd->kind;
5132 break;
5133
5134 case PARTITION_RANGE_DATUM_MAXVALUE:
5135 ereport(ERROR,
5136 (errcode(ERRCODE_DATATYPE_MISMATCH),
5137 errmsg("every bound following MAXVALUE must also be MAXVALUE"),
5138 parser_errposition(pstate, exprLocation((Node *) prd))));
5139 break;
5140
5141 case PARTITION_RANGE_DATUM_MINVALUE:
5142 ereport(ERROR,
5143 (errcode(ERRCODE_DATATYPE_MISMATCH),
5144 errmsg("every bound following MINVALUE must also be MINVALUE"),
5145 parser_errposition(pstate, exprLocation((Node *) prd))));
5146 break;
5147 }
5148 }
5149}
5150
5151/*
5152 * Transform one entry in a partition bound spec, producing a constant.
5153 */
5154static Const *
5155transformPartitionBoundValue(ParseState *pstate, Node *val,
5156 const char *colName, Oid colType, int32 colTypmod,
5157 Oid partCollation)
5158{
5159 Node *value;
5160
5161 /* Transform raw parsetree */
5162 value = transformExpr(pstate, val, EXPR_KIND_PARTITION_BOUND);
5163
5164 /*
5165 * transformExpr() should have already rejected column references,
5166 * subqueries, aggregates, window functions, and SRFs, based on the
5167 * EXPR_KIND_ of a partition bound expression.
5168 */
5169 Assert(!contain_var_clause(value));
5170
5171 /*
5172 * Coerce to the correct type. This might cause an explicit coercion step
5173 * to be added on top of the expression, which must be evaluated before
5174 * returning the result to the caller.
5175 */
5176 value = coerce_to_target_type(pstate,
5177 value, exprType(value),
5178 colType,
5179 colTypmod,
5180 COERCION_ASSIGNMENT,
5181 COERCE_IMPLICIT_CAST,
5182 -1);
5183
5184 if (value == NULL)
5185 ereport(ERROR,
5186 (errcode(ERRCODE_DATATYPE_MISMATCH),
5187 errmsg("specified value cannot be cast to type %s for column \"%s\"",
5188 format_type_be(colType), colName),
5189 parser_errposition(pstate, exprLocation(val))));
5190
5191 /*
5192 * Evaluate the expression, if needed, assigning the partition key's data
5193 * type and collation to the resulting Const node.
5194 */
5195 if (!IsA(value, Const))
5196 {
5197 assign_expr_collations(pstate, value);
5198 value = (Node *) expression_planner((Expr *) value);
5199 value = (Node *) evaluate_expr((Expr *) value, colType, colTypmod,
5200 partCollation);
5201 if (!IsA(value, Const))
5202 elog(ERROR, "could not evaluate partition bound expression");
5203 }
5204 else
5205 {
5206 /*
5207 * If the expression is already a Const, as is often the case, we can
5208 * skip the rather expensive steps above. But we still have to insert
5209 * the right collation, since coerce_to_target_type doesn't handle
5210 * that.
5211 */
5212 ((Const *) value)->constcollid = partCollation;
5213 }
5214
5215 /*
5216 * Attach original expression's parse location to the Const, so that
5217 * that's what will be reported for any later errors related to this
5218 * partition bound.
5219 */
5220 ((Const *) value)->location = exprLocation(val);
5221
5222 return (Const *) value;
5223}
AclResult
AclResult
Definition acl.h:183
ACLCHECK_OK
@ ACLCHECK_OK
Definition acl.h:184
aclcheck_error
void aclcheck_error(AclResult aclerr, ObjectType objtype, const char *objectname)
Definition aclchk.c:2672
object_aclcheck
AclResult object_aclcheck(Oid classid, Oid objectid, Oid roleid, AclMode mode)
Definition aclchk.c:3879
pg_class_aclcheck
AclResult pg_class_aclcheck(Oid table_oid, Oid roleid, AclMode mode)
Definition aclchk.c:4082
get_index_am_oid
Oid get_index_am_oid(const char *amname, bool missing_ok)
Definition amcmds.c:163
ARR_NDIM
#define ARR_NDIM(a)
Definition array.h:290
ARR_DATA_PTR
#define ARR_DATA_PTR(a)
Definition array.h:322
DatumGetArrayTypeP
#define DatumGetArrayTypeP(X)
Definition array.h:261
ARR_ELEMTYPE
#define ARR_ELEMTYPE(a)
Definition array.h:292
ARR_DIMS
#define ARR_DIMS(a)
Definition array.h:294
ARR_HASNULL
#define ARR_HASNULL(a)
Definition array.h:291
deconstruct_array_builtin
void deconstruct_array_builtin(const ArrayType *array, Oid elmtype, Datum **elemsp, bool **nullsp, int *nelemsp)
Definition arrayfuncs.c:3705
build_attrmap_by_name
AttrMap * build_attrmap_by_name(TupleDesc indesc, TupleDesc outdesc, bool missing_ok)
Definition attmap.c:175
AttrNumber
int16 AttrNumber
Definition attnum.h:21
AttributeNumberIsValid
#define AttributeNumberIsValid(attributeNumber)
Definition attnum.h:34
InvalidAttrNumber
#define InvalidAttrNumber
Definition attnum.h:23
get_tablespace_name
char * get_tablespace_name(Oid spc_oid)
Definition tablespace.c:1486
TextDatumGetCString
#define TextDatumGetCString(d)
Definition builtins.h:99
NameStr
#define NameStr(name)
Definition c.h:835
InvalidSubTransactionId
#define InvalidSubTransactionId
Definition c.h:742
Assert
#define Assert(condition)
Definition c.h:943
int16
int16_t int16
Definition c.h:619
int32
int32_t int32
Definition c.h:620
pg_fallthrough
#define pg_fallthrough
Definition c.h:161
OidIsValid
#define OidIsValid(objectId)
Definition c.h:858
result
uint32 result
Definition checksum_block_internal.h:18
memcpy
memcpy(sums, checksumBaseOffsets, sizeof(checksumBaseOffsets))
evaluate_expr
Expr * evaluate_expr(Expr *expr, Oid result_type, int32 result_typmod, Oid result_collation)
Definition clauses.c:5711
nspid
int nspid
Definition collationcmds.c:701
sequence_options
List * sequence_options(Oid relid)
Definition sequence.c:1712
GetComment
char * GetComment(Oid oid, Oid classoid, int32 subid)
Definition comment.c:420
errorConflictingDefElem
void errorConflictingDefElem(DefElem *defel, ParseState *pstate)
Definition define.c:370
errcode
int errcode(int sqlerrcode)
Definition elog.c:875
errhint
int errhint(const char *fmt,...) pg_attribute_printf(1
errdetail
int errdetail(const char *fmt,...) pg_attribute_printf(1
errmsg_internal
int int errmsg_internal(const char *fmt,...) pg_attribute_printf(1
DEBUG1
#define DEBUG1
Definition elog.h:31
ERROR
#define ERROR
Definition elog.h:40
elog
#define elog(elevel,...)
Definition elog.h:228
NOTICE
#define NOTICE
Definition elog.h:36
ereport
#define ereport(elevel,...)
Definition elog.h:152
equal
bool equal(const void *a, const void *b)
Definition equalfuncs.c:223
format_type_be
char * format_type_be(Oid type_oid)
Definition format_type.c:343
SystemAttributeByName
const FormData_pg_attribute * SystemAttributeByName(const char *attname)
Definition heap.c:248
SystemAttributeDefinition
const FormData_pg_attribute * SystemAttributeDefinition(AttrNumber attno)
Definition heap.c:236
HeapTupleIsValid
#define HeapTupleIsValid(tuple)
Definition htup.h:78
htup_details.h
GETSTRUCT
static void * GETSTRUCT(const HeapTupleData *tuple)
Definition htup_details.h:714
stmt
#define stmt
Definition indent_codes.h:59
comment
#define comment
Definition indent_codes.h:49
DEFAULT_INDEX_TYPE
#define DEFAULT_INDEX_TYPE
Definition index.h:27
index_close
void index_close(Relation relation, LOCKMODE lockmode)
Definition indexam.c:178
index_open
Relation index_open(Oid relationId, LOCKMODE lockmode)
Definition indexam.c:134
ChooseRelationName
char * ChooseRelationName(const char *name1, const char *name2, const char *label, Oid namespaceid, bool isconstraint)
Definition indexcmds.c:2634
GetDefaultOpClass
Oid GetDefaultOpClass(Oid type_id, Oid am_id)
Definition indexcmds.c:2371
val
long val
Definition informix.c:689
value
static struct @177 value
j
int j
Definition isn.c:78
i
int i
Definition isn.c:77
lappend
List * lappend(List *list, void *datum)
Definition list.c:339
list_concat
List * list_concat(List *list1, const List *list2)
Definition list.c:561
list_copy
List * list_copy(const List *oldlist)
Definition list.c:1573
lappend_oid
List * lappend_oid(List *list, Oid datum)
Definition list.c:375
lcons
List * lcons(void *datum, List *list)
Definition list.c:495
list_free
void list_free(List *list)
Definition list.c:1546
NoLock
#define NoLock
Definition lockdefs.h:34
AccessExclusiveLock
#define AccessExclusiveLock
Definition lockdefs.h:43
AccessShareLock
#define AccessShareLock
Definition lockdefs.h:36
get_rel_name
char * get_rel_name(Oid relid)
Definition lsyscache.c:2121
get_attnum
AttrNumber get_attnum(Oid relid, const char *attname)
Definition lsyscache.c:977
type_is_range
bool type_is_range(Oid typid)
Definition lsyscache.c:2883
get_attoptions
Datum get_attoptions(Oid relid, int16 attnum)
Definition lsyscache.c:1089
get_rel_namespace
Oid get_rel_namespace(Oid relid)
Definition lsyscache.c:2145
get_typcollation
Oid get_typcollation(Oid typid)
Definition lsyscache.c:3251
get_attname
char * get_attname(Oid relid, AttrNumber attnum, bool missing_ok)
Definition lsyscache.c:946
getBaseType
Oid getBaseType(Oid typid)
Definition lsyscache.c:2716
get_namespace_name
char * get_namespace_name(Oid nspid)
Definition lsyscache.c:3561
get_atttype
Oid get_atttype(Oid relid, AttrNumber attnum)
Definition lsyscache.c:1032
get_relname_relid
Oid get_relname_relid(const char *relname, Oid relnamespace)
Definition lsyscache.c:2078
type_is_multirange
bool type_is_multirange(Oid typid)
Definition lsyscache.c:2893
makeAlias
Alias * makeAlias(const char *aliasname, List *colnames)
Definition makefuncs.c:438
makeDefElem
DefElem * makeDefElem(char *name, Node *arg, int location)
Definition makefuncs.c:637
makeFromExpr
FromExpr * makeFromExpr(List *fromlist, Node *quals)
Definition makefuncs.c:336
makeColumnDef
ColumnDef * makeColumnDef(const char *colname, Oid typeOid, int32 typmod, Oid collOid)
Definition makefuncs.c:565
makeRangeVar
RangeVar * makeRangeVar(char *schemaname, char *relname, int location)
Definition makefuncs.c:473
makeFuncCall
FuncCall * makeFuncCall(List *name, List *args, CoercionForm funcformat, int location)
Definition makefuncs.c:676
makeNotNullConstraint
Constraint * makeNotNullConstraint(String *colname)
Definition makefuncs.c:493
makeTypeNameFromOid
TypeName * makeTypeNameFromOid(Oid typeOid, int32 typmod)
Definition makefuncs.c:547
pstrdup
char * pstrdup(const char *in)
Definition mcxt.c:1781
pfree
void pfree(void *pointer)
Definition mcxt.c:1616
GetUserId
Oid GetUserId(void)
Definition miscinit.c:470
RangeVarGetAndCheckCreationNamespace
Oid RangeVarGetAndCheckCreationNamespace(RangeVar *relation, LOCKMODE lockmode, Oid *existing_relation_id)
Definition namespace.c:740
RangeVarAdjustRelationPersistence
void RangeVarAdjustRelationPersistence(RangeVar *newRelation, Oid nspid)
Definition namespace.c:847
DeconstructQualifiedName
void DeconstructQualifiedName(const List *names, char **nspname_p, char **objname_p)
Definition namespace.c:3373
RangeVarGetCreationNamespace
Oid RangeVarGetCreationNamespace(const RangeVar *newRelation)
Definition namespace.c:655
makeRangeVarFromNameList
RangeVar * makeRangeVarFromNameList(const List *names)
Definition namespace.c:3626
RangeVarGetRelidExtended
Oid RangeVarGetRelidExtended(const RangeVar *relation, LOCKMODE lockmode, uint32 flags, RangeVarGetRelidCallback callback, void *callback_arg)
Definition namespace.c:442
exprType
Oid exprType(const Node *expr)
Definition nodeFuncs.c:42
exprLocation
int exprLocation(const Node *expr)
Definition nodeFuncs.c:1392
IsA
#define IsA(nodeptr, _type_)
Definition nodes.h:164
copyObject
#define copyObject(obj)
Definition nodes.h:232
nodeTag
#define nodeTag(nodeptr)
Definition nodes.h:139
CMD_UTILITY
@ CMD_UTILITY
Definition nodes.h:280
CMD_INSERT
@ CMD_INSERT
Definition nodes.h:277
CMD_DELETE
@ CMD_DELETE
Definition nodes.h:278
CMD_UPDATE
@ CMD_UPDATE
Definition nodes.h:276
CMD_SELECT
@ CMD_SELECT
Definition nodes.h:275
CMD_NOTHING
@ CMD_NOTHING
Definition nodes.h:282
makeNode
#define makeNode(_type_)
Definition nodes.h:161
castNode
#define castNode(_type_, nodeptr)
Definition nodes.h:182
errmsg
static char * errmsg
Definition oauth_hook_client.c:61
get_relkind_objtype
ObjectType get_relkind_objtype(char relkind)
Definition objectaddress.c:6519
ObjectAddressSet
#define ObjectAddressSet(addr, class_id, object_id)
Definition objectaddress.h:41
nodeToString
char * nodeToString(const void *obj)
Definition outfuncs.c:811
transformWhereClause
Node * transformWhereClause(ParseState *pstate, Node *clause, ParseExprKind exprKind, const char *constructName)
Definition parse_clause.c:1996
parse_clause.h
coerce_to_target_type
Node * coerce_to_target_type(ParseState *pstate, Node *expr, Oid exprtype, Oid targettype, int32 targettypmod, CoercionContext ccontext, CoercionForm cformat, int location)
Definition parse_coerce.c:79
parse_coerce.h
assign_expr_collations
void assign_expr_collations(ParseState *pstate, Node *expr)
Definition parse_collate.c:177
parse_collate.h
transformExpr
Node * transformExpr(ParseState *pstate, Node *expr, ParseExprKind exprKind)
Definition parse_expr.c:121
parse_expr.h
cancel_parser_errposition_callback
void cancel_parser_errposition_callback(ParseCallbackState *pcbstate)
Definition parse_node.c:156
free_parsestate
void free_parsestate(ParseState *pstate)
Definition parse_node.c:72
parser_errposition
int parser_errposition(ParseState *pstate, int location)
Definition parse_node.c:106
setup_parser_errposition_callback
void setup_parser_errposition_callback(ParseCallbackState *pcbstate, ParseState *pstate, int location)
Definition parse_node.c:140
make_parsestate
ParseState * make_parsestate(ParseState *parentParseState)
Definition parse_node.c:39
EXPR_KIND_STATS_EXPRESSION
@ EXPR_KIND_STATS_EXPRESSION
Definition parse_node.h:75
EXPR_KIND_INDEX_EXPRESSION
@ EXPR_KIND_INDEX_EXPRESSION
Definition parse_node.h:73
EXPR_KIND_PARTITION_BOUND
@ EXPR_KIND_PARTITION_BOUND
Definition parse_node.h:80
EXPR_KIND_INDEX_PREDICATE
@ EXPR_KIND_INDEX_PREDICATE
Definition parse_node.h:74
EXPR_KIND_ALTER_COL_TRANSFORM
@ EXPR_KIND_ALTER_COL_TRANSFORM
Definition parse_node.h:76
EXPR_KIND_WHERE
@ EXPR_KIND_WHERE
Definition parse_node.h:46
addNSItemToQuery
void addNSItemToQuery(ParseState *pstate, ParseNamespaceItem *nsitem, bool addToJoinList, bool addToRelNameSpace, bool addToVarNameSpace)
Definition parse_relation.c:2793
addRangeTableEntryForRelation
ParseNamespaceItem * addRangeTableEntryForRelation(ParseState *pstate, Relation rel, LOCKMODE lockmode, Alias *alias, bool inh, bool inFromCl)
Definition parse_relation.c:1572
parse_relation.h
FigureIndexColname
char * FigureIndexColname(Node *node)
Definition parse_target.c:1738
parse_target.h
LookupCollation
Oid LookupCollation(ParseState *pstate, List *collnames, int location)
Definition parse_type.c:515
typenameType
Type typenameType(ParseState *pstate, const TypeName *typeName, int32 *typmod_p)
Definition parse_type.c:264
typenameTypeId
Oid typenameTypeId(ParseState *pstate, const TypeName *typeName)
Definition parse_type.c:291
parse_type.h
generateSerialExtraStmts
static void generateSerialExtraStmts(CreateStmtContext *cxt, ColumnDef *column, Oid seqtypid, List *seqoptions, bool for_identity, bool col_exists, char **snamespace_p, char **sname_p)
Definition parse_utilcmd.c:388
transformCreateStmt
List * transformCreateStmt(CreateStmt *stmt, const char *queryString)
Definition parse_utilcmd.c:162
transformIndexStmt
IndexStmt * transformIndexStmt(Oid relid, IndexStmt *stmt, const char *queryString)
Definition parse_utilcmd.c:3062
transformCreateSchemaStmtElements
List * transformCreateSchemaStmtElements(ParseState *pstate, List *schemaElts, const char *schemaName)
Definition parse_utilcmd.c:4429
transformColumnType
static void transformColumnType(CreateStmtContext *cxt, ColumnDef *column)
Definition parse_utilcmd.c:4371
transformColumnDefinition
static void transformColumnDefinition(CreateStmtContext *cxt, ColumnDef *column)
Definition parse_utilcmd.c:589
transformCreateSchemaCreateTable
static CreateStmt * transformCreateSchemaCreateTable(ParseState *pstate, CreateStmt *stmt, List **fk_elements)
Definition parse_utilcmd.c:4636
transformRuleStmt
void transformRuleStmt(RuleStmt *stmt, const char *queryString, List **actions, Node **whereClause)
Definition parse_utilcmd.c:3232
transformConstraintAttrs
static void transformConstraintAttrs(ParseState *pstate, List *constraintList)
Definition parse_utilcmd.c:4216
transformIndexConstraints
static void transformIndexConstraints(CreateStmtContext *cxt)
Definition parse_utilcmd.c:2245
get_collation
static List * get_collation(Oid collation, Oid actual_datatype)
Definition parse_utilcmd.c:2179
transformIndexConstraint
static IndexStmt * transformIndexConstraint(Constraint *constraint, CreateStmtContext *cxt)
Definition parse_utilcmd.c:2344
checkSchemaNameRV
static void checkSchemaNameRV(ParseState *pstate, const char *context_schema, RangeVar *relation)
Definition parse_utilcmd.c:4582
transformAlterTableStmt
AlterTableStmt * transformAlterTableStmt(Oid relid, AlterTableStmt *stmt, const char *queryString, List **beforeStmts, List **afterStmts)
Definition parse_utilcmd.c:3820
transformTableLikeClause
static void transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_clause)
Definition parse_utilcmd.c:1124
expandTableLikeClause
List * expandTableLikeClause(RangeVar *heapRel, TableLikeClause *table_like_clause)
Definition parse_utilcmd.c:1342
transformPartitionCmdForSplit
static void transformPartitionCmdForSplit(CreateStmtContext *cxt, PartitionCmd *partcmd)
Definition parse_utilcmd.c:3575
transformTableConstraint
static void transformTableConstraint(CreateStmtContext *cxt, Constraint *constraint)
Definition parse_utilcmd.c:1033
get_opclass
static List * get_opclass(Oid opclass, Oid actual_datatype)
Definition parse_utilcmd.c:2213
transformPartitionCmdForMerge
static void transformPartitionCmdForMerge(CreateStmtContext *cxt, PartitionCmd *partcmd)
Definition parse_utilcmd.c:3720
checkPartition
static void checkPartition(Relation rel, Oid partRelOid, bool isMerge)
Definition parse_utilcmd.c:3532
transformPartitionRangeBounds
static List * transformPartitionRangeBounds(ParseState *pstate, List *blist, Relation parent)
Definition parse_utilcmd.c:4998
transformStatsStmt
CreateStatsStmt * transformStatsStmt(Oid relid, CreateStatsStmt *stmt, const char *queryString)
Definition parse_utilcmd.c:3157
validateInfiniteBounds
static void validateInfiniteBounds(ParseState *pstate, List *blist)
Definition parse_utilcmd.c:5116
transformPartitionCmd
static void transformPartitionCmd(CreateStmtContext *cxt, PartitionBoundSpec *bound)
Definition parse_utilcmd.c:4791
transformPartitionBoundValue
static Const * transformPartitionBoundValue(ParseState *pstate, Node *val, const char *colName, Oid colType, int32 colTypmod, Oid partCollation)
Definition parse_utilcmd.c:5155
transformCheckConstraints
static void transformCheckConstraints(CreateStmtContext *cxt, bool skipValidation)
Definition parse_utilcmd.c:2958
transformOfType
static void transformOfType(CreateStmtContext *cxt, TypeName *ofTypename)
Definition parse_utilcmd.c:1637
generateClonedExtStatsStmt
static CreateStatsStmt * generateClonedExtStatsStmt(RangeVar *heapRel, Oid heapRelid, Oid source_statsid, const AttrMap *attmap)
Definition parse_utilcmd.c:2051
transformPartitionBound
PartitionBoundSpec * transformPartitionBound(ParseState *pstate, Relation parent, PartitionBoundSpec *spec)
Definition parse_utilcmd.c:4844
transformFKConstraints
static void transformFKConstraints(CreateStmtContext *cxt, bool skipValidation, bool isAddConstraint)
Definition parse_utilcmd.c:2989
generateClonedIndexStmt
IndexStmt * generateClonedIndexStmt(RangeVar *heapRel, Relation source_idx, const AttrMap *attmap, Oid *constraintOid)
Definition parse_utilcmd.c:1690
checkSchemaNameList
static void checkSchemaNameList(const char *context_schema, List *qualified_name)
Definition parse_utilcmd.c:4613
SUPPORTS_ATTRS
#define SUPPORTS_ATTRS(node)
parse_utilcmd.h
SORTBY_NULLS_DEFAULT
@ SORTBY_NULLS_DEFAULT
Definition parsenodes.h:54
SORTBY_NULLS_LAST
@ SORTBY_NULLS_LAST
Definition parsenodes.h:56
SORTBY_NULLS_FIRST
@ SORTBY_NULLS_FIRST
Definition parsenodes.h:55
ACL_USAGE
#define ACL_USAGE
Definition parsenodes.h:84
PARTITION_STRATEGY_HASH
@ PARTITION_STRATEGY_HASH
Definition parsenodes.h:919
PARTITION_STRATEGY_LIST
@ PARTITION_STRATEGY_LIST
Definition parsenodes.h:917
PARTITION_STRATEGY_RANGE
@ PARTITION_STRATEGY_RANGE
Definition parsenodes.h:918
CONSTR_ATTR_ENFORCED
@ CONSTR_ATTR_ENFORCED
Definition parsenodes.h:2923
CONSTR_FOREIGN
@ CONSTR_FOREIGN
Definition parsenodes.h:2918
CONSTR_ATTR_DEFERRED
@ CONSTR_ATTR_DEFERRED
Definition parsenodes.h:2921
CONSTR_IDENTITY
@ CONSTR_IDENTITY
Definition parsenodes.h:2912
CONSTR_UNIQUE
@ CONSTR_UNIQUE
Definition parsenodes.h:2916
CONSTR_ATTR_NOT_DEFERRABLE
@ CONSTR_ATTR_NOT_DEFERRABLE
Definition parsenodes.h:2920
CONSTR_DEFAULT
@ CONSTR_DEFAULT
Definition parsenodes.h:2911
CONSTR_NOTNULL
@ CONSTR_NOTNULL
Definition parsenodes.h:2910
CONSTR_ATTR_IMMEDIATE
@ CONSTR_ATTR_IMMEDIATE
Definition parsenodes.h:2922
CONSTR_CHECK
@ CONSTR_CHECK
Definition parsenodes.h:2914
CONSTR_NULL
@ CONSTR_NULL
Definition parsenodes.h:2908
CONSTR_GENERATED
@ CONSTR_GENERATED
Definition parsenodes.h:2913
CONSTR_EXCLUSION
@ CONSTR_EXCLUSION
Definition parsenodes.h:2917
CONSTR_ATTR_DEFERRABLE
@ CONSTR_ATTR_DEFERRABLE
Definition parsenodes.h:2919
CONSTR_ATTR_NOT_ENFORCED
@ CONSTR_ATTR_NOT_ENFORCED
Definition parsenodes.h:2924
CONSTR_PRIMARY
@ CONSTR_PRIMARY
Definition parsenodes.h:2915
PartitionRangeDatumKind
PartitionRangeDatumKind
Definition parsenodes.h:968
PARTITION_RANGE_DATUM_MAXVALUE
@ PARTITION_RANGE_DATUM_MAXVALUE
Definition parsenodes.h:971
PARTITION_RANGE_DATUM_VALUE
@ PARTITION_RANGE_DATUM_VALUE
Definition parsenodes.h:970
PARTITION_RANGE_DATUM_MINVALUE
@ PARTITION_RANGE_DATUM_MINVALUE
Definition parsenodes.h:969
DROP_RESTRICT
@ DROP_RESTRICT
Definition parsenodes.h:2505
OBJECT_FOREIGN_TABLE
@ OBJECT_FOREIGN_TABLE
Definition parsenodes.h:2449
OBJECT_COLUMN
@ OBJECT_COLUMN
Definition parsenodes.h:2437
OBJECT_TABLE
@ OBJECT_TABLE
Definition parsenodes.h:2473
OBJECT_TYPE
@ OBJECT_TYPE
Definition parsenodes.h:2481
OBJECT_TABCONSTRAINT
@ OBJECT_TABCONSTRAINT
Definition parsenodes.h:2472
AT_AddIndexConstraint
@ AT_AddIndexConstraint
Definition parsenodes.h:2545
AT_MergePartitions
@ AT_MergePartitions
Definition parsenodes.h:2587
AT_SetIdentity
@ AT_SetIdentity
Definition parsenodes.h:2589
AT_AddIndex
@ AT_AddIndex
Definition parsenodes.h:2538
AT_AddIdentity
@ AT_AddIdentity
Definition parsenodes.h:2588
AT_AlterColumnType
@ AT_AlterColumnType
Definition parsenodes.h:2548
AT_AlterColumnGenericOptions
@ AT_AlterColumnGenericOptions
Definition parsenodes.h:2549
AT_DetachPartition
@ AT_DetachPartition
Definition parsenodes.h:2584
AT_AttachPartition
@ AT_AttachPartition
Definition parsenodes.h:2583
AT_AddConstraint
@ AT_AddConstraint
Definition parsenodes.h:2540
AT_CookedColumnDefault
@ AT_CookedColumnDefault
Definition parsenodes.h:2527
AT_SplitPartition
@ AT_SplitPartition
Definition parsenodes.h:2586
AT_AddColumn
@ AT_AddColumn
Definition parsenodes.h:2524
ACL_SELECT
#define ACL_SELECT
Definition parsenodes.h:77
SORTBY_DESC
@ SORTBY_DESC
Definition parsenodes.h:48
SORTBY_DEFAULT
@ SORTBY_DEFAULT
Definition parsenodes.h:46
CREATE_TABLE_LIKE_COMMENTS
@ CREATE_TABLE_LIKE_COMMENTS
Definition parsenodes.h:805
CREATE_TABLE_LIKE_GENERATED
@ CREATE_TABLE_LIKE_GENERATED
Definition parsenodes.h:809
CREATE_TABLE_LIKE_IDENTITY
@ CREATE_TABLE_LIKE_IDENTITY
Definition parsenodes.h:810
CREATE_TABLE_LIKE_COMPRESSION
@ CREATE_TABLE_LIKE_COMPRESSION
Definition parsenodes.h:806
CREATE_TABLE_LIKE_STORAGE
@ CREATE_TABLE_LIKE_STORAGE
Definition parsenodes.h:813
CREATE_TABLE_LIKE_INDEXES
@ CREATE_TABLE_LIKE_INDEXES
Definition parsenodes.h:811
CREATE_TABLE_LIKE_DEFAULTS
@ CREATE_TABLE_LIKE_DEFAULTS
Definition parsenodes.h:808
CREATE_TABLE_LIKE_STATISTICS
@ CREATE_TABLE_LIKE_STATISTICS
Definition parsenodes.h:812
CREATE_TABLE_LIKE_CONSTRAINTS
@ CREATE_TABLE_LIKE_CONSTRAINTS
Definition parsenodes.h:807
transformStmt
Query * transformStmt(ParseState *pstate, Node *parseTree)
Definition analyze.c:334
SystemFuncName
List * SystemFuncName(char *name)
SystemTypeName
TypeName * SystemTypeName(char *name)
check_partitions_for_split
void check_partitions_for_split(Relation parent, Oid splitPartOid, List *partlist, ParseState *pstate)
Definition partbounds.c:5724
calculate_partition_bound_for_merge
void calculate_partition_bound_for_merge(Relation parent, List *partNames, List *partOids, PartitionBoundSpec *spec, ParseState *pstate)
Definition partbounds.c:5099
RelationGetPartitionKey
PartitionKey RelationGetPartitionKey(Relation rel)
Definition partcache.c:51
get_partition_strategy
static int get_partition_strategy(PartitionKey key)
Definition partcache.h:59
get_partition_col_typmod
static int32 get_partition_col_typmod(PartitionKey key, int col)
Definition partcache.h:92
get_partition_natts
static int get_partition_natts(PartitionKey key)
Definition partcache.h:65
get_partition_col_typid
static Oid get_partition_col_typid(PartitionKey key, int col)
Definition partcache.h:86
get_partition_exprs
static List * get_partition_exprs(PartitionKey key)
Definition partcache.h:71
get_partition_col_collation
static Oid get_partition_col_collation(PartitionKey key, int col)
Definition partcache.h:98
RelationGetPartitionDesc
PartitionDesc RelationGetPartitionDesc(Relation rel, bool omit_detached)
Definition partdesc.c:71
get_default_oid_from_partdesc
Oid get_default_oid_from_partdesc(PartitionDesc partdesc)
Definition partdesc.c:501
get_partition_parent
Oid get_partition_parent(Oid relid, bool even_if_detached)
Definition partition.c:53
pg_am.h
Form_pg_am
END_CATALOG_STRUCT typedef FormData_pg_am * Form_pg_am
Definition pg_am.h:52
FormData_pg_attribute
FormData_pg_attribute
Definition pg_attribute.h:188
attname
NameData attname
Definition pg_attribute.h:43
attnum
int16 attnum
Definition pg_attribute.h:76
Form_pg_attribute
FormData_pg_attribute * Form_pg_attribute
Definition pg_attribute.h:206
errdetail_relkind_not_supported
int errdetail_relkind_not_supported(char relkind)
Definition pg_class.c:24
Form_pg_class
FormData_pg_class * Form_pg_class
Definition pg_class.h:160
pg_collation.h
Form_pg_collation
END_CATALOG_STRUCT typedef FormData_pg_collation * Form_pg_collation
Definition pg_collation.h:62
RelationGetNotNullConstraints
List * RelationGetNotNullConstraints(Oid relid, bool cooked, bool include_noinh)
Definition pg_constraint.c:834
get_relation_constraint_oid
Oid get_relation_constraint_oid(Oid relid, const char *conname, bool missing_ok)
Definition pg_constraint.c:1200
pg_constraint.h
Form_pg_constraint
END_CATALOG_STRUCT typedef FormData_pg_constraint * Form_pg_constraint
Definition pg_constraint.h:179
checkMembershipInCurrentExtension
void checkMembershipInCurrentExtension(const ObjectAddress *object)
Definition pg_depend.c:260
getIdentitySequence
Oid getIdentitySequence(Relation rel, AttrNumber attnum, bool missing_ok)
Definition pg_depend.c:1018
get_index_constraint
Oid get_index_constraint(Oid indexId)
Definition pg_depend.c:1061
Form_pg_index
END_CATALOG_STRUCT typedef FormData_pg_index * Form_pg_index
Definition pg_index.h:74
lfirst
#define lfirst(lc)
Definition pg_list.h:172
lfirst_node
#define lfirst_node(type, lc)
Definition pg_list.h:176
list_length
static int list_length(const List *l)
Definition pg_list.h:152
linitial_node
#define linitial_node(type, l)
Definition pg_list.h:181
NIL
#define NIL
Definition pg_list.h:68
lsecond_node
#define lsecond_node(type, l)
Definition pg_list.h:186
foreach_current_index
#define foreach_current_index(var_or_cell)
Definition pg_list.h:435
foreach_delete_current
#define foreach_delete_current(lst, var_or_cell)
Definition pg_list.h:423
list_make1
#define list_make1(x1)
Definition pg_list.h:244
for_each_cell
#define for_each_cell(cell, lst, initcell)
Definition pg_list.h:470
list_nth
static void * list_nth(const List *list, int n)
Definition pg_list.h:331
linitial
#define linitial(l)
Definition pg_list.h:178
list_make3
#define list_make3(x1, x2, x3)
Definition pg_list.h:248
foreach_node
#define foreach_node(type, var, lst)
Definition pg_list.h:528
list_head
static ListCell * list_head(const List *l)
Definition pg_list.h:128
lnext
static ListCell * lnext(const List *l, const ListCell *c)
Definition pg_list.h:375
lfirst_oid
#define lfirst_oid(lc)
Definition pg_list.h:174
list_make2
#define list_make2(x1, x2)
Definition pg_list.h:246
list_last_cell
static ListCell * list_last_cell(const List *list)
Definition pg_list.h:320
pg_opclass.h
Form_pg_opclass
END_CATALOG_STRUCT typedef FormData_pg_opclass * Form_pg_opclass
Definition pg_opclass.h:87
pg_operator.h
Form_pg_operator
END_CATALOG_STRUCT typedef FormData_pg_operator * Form_pg_operator
Definition pg_operator.h:87
pg_statistic_ext.h
Form_pg_statistic_ext
END_CATALOG_STRUCT typedef FormData_pg_statistic_ext * Form_pg_statistic_ext
Definition pg_statistic_ext.h:73
pg_type.h
Form_pg_type
END_CATALOG_STRUCT typedef FormData_pg_type * Form_pg_type
Definition pg_type.h:265
typname
NameData typname
Definition pg_type.h:43
expression_planner
Expr * expression_planner(Expr *expr)
Definition planner.c:6839
DatumGetObjectId
static Oid DatumGetObjectId(Datum X)
Definition postgres.h:242
ObjectIdGetDatum
static Datum ObjectIdGetDatum(Oid X)
Definition postgres.h:252
Datum
uint64_t Datum
Definition postgres.h:70
DatumGetPointer
static Pointer DatumGetPointer(Datum X)
Definition postgres.h:332
InvalidOid
#define InvalidOid
Definition postgres_ext.h:37
Oid
unsigned int Oid
Definition postgres_ext.h:32
fb
static int fb(int x)
Definition preproc-init.c:92
PRS2_OLD_VARNO
#define PRS2_OLD_VARNO
Definition primnodes.h:251
PRS2_NEW_VARNO
#define PRS2_NEW_VARNO
Definition primnodes.h:252
COERCE_IMPLICIT_CAST
@ COERCE_IMPLICIT_CAST
Definition primnodes.h:769
COERCE_EXPLICIT_CALL
@ COERCE_EXPLICIT_CALL
Definition primnodes.h:767
COERCION_ASSIGNMENT
@ COERCION_ASSIGNMENT
Definition primnodes.h:748
stringToNode
void * stringToNode(const char *str)
Definition read.c:90
element
static chr element(struct vars *v, const chr *startp, const chr *endp)
Definition regc_locale.c:376
RelationGetForm
#define RelationGetForm(relation)
Definition rel.h:510
RelationGetRelid
#define RelationGetRelid(relation)
Definition rel.h:516
RelationGetDescr
#define RelationGetDescr(relation)
Definition rel.h:542
RelationGetRelationName
#define RelationGetRelationName(relation)
Definition rel.h:550
RelationGetNamespace
#define RelationGetNamespace(relation)
Definition rel.h:557
RelationGetIndexList
List * RelationGetIndexList(Relation relation)
Definition relcache.c:4827
RelationGetIndexPredicate
List * RelationGetIndexPredicate(Relation relation)
Definition relcache.c:5201
RelationGetStatExtList
List * RelationGetStatExtList(Relation relation)
Definition relcache.c:4968
RelationGetIndexExpressions
List * RelationGetIndexExpressions(Relation relation)
Definition relcache.c:5088
untransformRelOptions
List * untransformRelOptions(Datum options)
Definition reloptions.c:1450
InvalidRelFileNumber
#define InvalidRelFileNumber
Definition relpath.h:26
rangeTableEntry_used
bool rangeTableEntry_used(Node *node, int rt_index, int sublevels_up)
Definition rewriteManip.c:1070
getInsertSelectQuery
Query * getInsertSelectQuery(Query *parsetree, Query ***subquery_ptr)
Definition rewriteManip.c:1102
map_variable_attnos
Node * map_variable_attnos(Node *node, int target_varno, int sublevels_up, const AttrMap *attno_map, Oid to_rowtype, bool *found_whole_row)
Definition rewriteManip.c:1695
quote_qualified_identifier
char * quote_qualified_identifier(const char *qualifier, const char *ident)
Definition ruleutils.c:13760
deparse_context_for
List * deparse_context_for(const char *aliasname, Oid relid)
Definition ruleutils.c:4070
deparse_expression
char * deparse_expression(Node *expr, List *dpcontext, bool forceprefix, bool showimplicit)
Definition ruleutils.c:4007
relation_close
void relation_close(Relation relation, LOCKMODE lockmode)
Definition relation.c:206
relation_openrv
Relation relation_openrv(const RangeVar *relation, LOCKMODE lockmode)
Definition relation.c:138
relation_open
Relation relation_open(Oid relationId, LOCKMODE lockmode)
Definition relation.c:48
A_Const
Definition parsenodes.h:386
AlterTableCmd::behavior
DropBehavior behavior
Definition parsenodes.h:2605
AlterTableCmd::subtype
AlterTableType subtype
Definition parsenodes.h:2597
ColumnDef::identity
char identity
Definition parsenodes.h:781
ColumnDef::constraints
List * constraints
Definition parsenodes.h:787
ColumnDef::cooked_default
Node * cooked_default
Definition parsenodes.h:780
ColumnDef::colname
char * colname
Definition parsenodes.h:770
ColumnDef::typeName
TypeName * typeName
Definition parsenodes.h:771
ColumnDef::generated
char generated
Definition parsenodes.h:784
ColumnDef::is_from_type
bool is_from_type
Definition parsenodes.h:776
ColumnDef::raw_default
Node * raw_default
Definition parsenodes.h:779
ColumnDef::storage
char storage
Definition parsenodes.h:777
ColumnDef::compression
char * compression
Definition parsenodes.h:772
ConstrCheck::ccname
char * ccname
Definition tupdesc.h:30
ConstrCheck::ccenforced
bool ccenforced
Definition tupdesc.h:32
ConstrCheck::ccnoinherit
bool ccnoinherit
Definition tupdesc.h:34
ConstrCheck::ccbin
char * ccbin
Definition tupdesc.h:31
Constraint::initdeferred
bool initdeferred
Definition parsenodes.h:2945
Constraint::exclusions
List * exclusions
Definition parsenodes.h:2962
Constraint::location
ParseLoc location
Definition parsenodes.h:2986
Constraint::reset_default_tblspc
bool reset_default_tblspc
Definition parsenodes.h:2967
Constraint::keys
List * keys
Definition parsenodes.h:2957
Constraint::where_clause
Node * where_clause
Definition parsenodes.h:2970
Constraint::indexname
char * indexname
Definition parsenodes.h:2965
Constraint::indexspace
char * indexspace
Definition parsenodes.h:2966
Constraint::contype
ConstrType contype
Definition parsenodes.h:2942
Constraint::access_method
char * access_method
Definition parsenodes.h:2969
Constraint::is_no_inherit
bool is_no_inherit
Definition parsenodes.h:2949
Constraint::options
List * options
Definition parsenodes.h:2964
Constraint::is_enforced
bool is_enforced
Definition parsenodes.h:2946
Constraint::nulls_not_distinct
bool nulls_not_distinct
Definition parsenodes.h:2956
Constraint::cooked_expr
char * cooked_expr
Definition parsenodes.h:2952
Constraint::initially_valid
bool initially_valid
Definition parsenodes.h:2948
Constraint::skip_validation
bool skip_validation
Definition parsenodes.h:2947
Constraint::without_overlaps
bool without_overlaps
Definition parsenodes.h:2959
Constraint::deferrable
bool deferrable
Definition parsenodes.h:2944
Constraint::raw_expr
Node * raw_expr
Definition parsenodes.h:2950
Constraint::conname
char * conname
Definition parsenodes.h:2943
Constraint::generated_when
char generated_when
Definition parsenodes.h:2954
Constraint::including
List * including
Definition parsenodes.h:2960
CreateStmtContext::stmtType
const char * stmtType
Definition parse_utilcmd.c:80
CreateStmtContext::relation
RangeVar * relation
Definition parse_utilcmd.c:81
CreateStmtContext::pstate
ParseState * pstate
Definition parse_utilcmd.c:79
CreateStmtContext::partbound
PartitionBoundSpec * partbound
Definition parse_utilcmd.c:98
DefElem::defname
char * defname
Definition parsenodes.h:860
IndexElem::indexcolname
char * indexcolname
Definition parsenodes.h:829
List
Definition pg_list.h:54
Node
Definition nodes.h:135
ParseState::p_sourcetext
const char * p_sourcetext
Definition parse_node.h:214
ParseState::p_rteperminfos
List * p_rteperminfos
Definition parse_node.h:216
ParseState::p_rtable
List * p_rtable
Definition parse_node.h:215
RangeVar::relname
char * relname
Definition primnodes.h:84
RangeVar::relpersistence
char relpersistence
Definition primnodes.h:90
RangeVar::location
ParseLoc location
Definition primnodes.h:96
RangeVar::schemaname
char * schemaname
Definition primnodes.h:81
RelationData::rd_att
TupleDesc rd_att
Definition rel.h:112
RelationData::rd_rel
Form_pg_class rd_rel
Definition rel.h:111
StatsElem::expr
Node * expr
Definition parsenodes.h:3651
String
Definition value.h:64
TupleConstr::check
ConstrCheck * check
Definition tupdesc.h:41
TupleConstr::num_check
uint16 num_check
Definition tupdesc.h:44
TypeName::typeOid
Oid typeOid
Definition parsenodes.h:289
index
Definition type.h:96
oidvector
Definition c.h:815
ReleaseSysCache
void ReleaseSysCache(HeapTuple tuple)
Definition syscache.c:265
SysCacheGetAttrNotNull
Datum SysCacheGetAttrNotNull(SysCacheIdentifier cacheId, HeapTuple tup, AttrNumber attributeNumber)
Definition syscache.c:626
SearchSysCache1
HeapTuple SearchSysCache1(SysCacheIdentifier cacheId, Datum key1)
Definition syscache.c:221
SysCacheGetAttr
Datum SysCacheGetAttr(SysCacheIdentifier cacheId, HeapTuple tup, AttrNumber attributeNumber, bool *isNull)
Definition syscache.c:596
table_close
void table_close(Relation relation, LOCKMODE lockmode)
Definition table.c:126
table_open
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition table.c:40
table_openrv
Relation table_openrv(const RangeVar *relation, LOCKMODE lockmode)
Definition table.c:83
check_of_type
void check_of_type(HeapTuple typetuple)
Definition tablecmds.c:7233
RangeVarCallbackOwnsRelation
void RangeVarCallbackOwnsRelation(const RangeVar *relation, Oid relId, Oid oldRelId, void *arg)
Definition tablecmds.c:19818
GetCompressionMethodName
const char * GetCompressionMethodName(char method)
Definition toast_compression.c:304
toast_compression.h
CompressionMethodIsValid
#define CompressionMethodIsValid(cm)
Definition toast_compression.h:53
TupleDescGetDefault
Node * TupleDescGetDefault(TupleDesc tupdesc, AttrNumber attnum)
Definition tupdesc.c:1152
ReleaseTupleDesc
#define ReleaseTupleDesc(tupdesc)
Definition tupdesc.h:240
TupleDescAttr
static FormData_pg_attribute * TupleDescAttr(TupleDesc tupdesc, int i)
Definition tupdesc.h:178
lookup_rowtype_tupdesc
TupleDesc lookup_rowtype_tupdesc(Oid type_id, int32 typmod)
Definition typcache.c:1947
makeString
String * makeString(char *str)
Definition value.c:63
strVal
#define strVal(v)
Definition value.h:82
contain_var_clause
bool contain_var_clause(Node *node)
Definition var.c:406
name
const char * name
Definition wait_event_funcs.c:29