Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * alter.c
4 : * Drivers for generic alter commands
5 : *
6 : * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : *
10 : * IDENTIFICATION
11 : * src/backend/commands/alter.c
12 : *
13 : *-------------------------------------------------------------------------
14 : */
15 : #include "postgres.h"
16 :
17 : #include "access/htup_details.h"
18 : #include "access/relation.h"
19 : #include "access/table.h"
20 : #include "catalog/dependency.h"
21 : #include "catalog/indexing.h"
22 : #include "catalog/namespace.h"
23 : #include "catalog/objectaccess.h"
24 : #include "catalog/pg_collation.h"
25 : #include "catalog/pg_conversion.h"
26 : #include "catalog/pg_database_d.h"
27 : #include "catalog/pg_event_trigger.h"
28 : #include "catalog/pg_foreign_data_wrapper.h"
29 : #include "catalog/pg_foreign_server.h"
30 : #include "catalog/pg_language.h"
31 : #include "catalog/pg_largeobject.h"
32 : #include "catalog/pg_largeobject_metadata.h"
33 : #include "catalog/pg_namespace.h"
34 : #include "catalog/pg_opclass.h"
35 : #include "catalog/pg_operator.h"
36 : #include "catalog/pg_opfamily.h"
37 : #include "catalog/pg_proc.h"
38 : #include "catalog/pg_statistic_ext.h"
39 : #include "catalog/pg_subscription.h"
40 : #include "catalog/pg_ts_config.h"
41 : #include "catalog/pg_ts_dict.h"
42 : #include "catalog/pg_ts_parser.h"
43 : #include "catalog/pg_ts_template.h"
44 : #include "commands/alter.h"
45 : #include "commands/collationcmds.h"
46 : #include "commands/dbcommands.h"
47 : #include "commands/defrem.h"
48 : #include "commands/event_trigger.h"
49 : #include "commands/extension.h"
50 : #include "commands/policy.h"
51 : #include "commands/publicationcmds.h"
52 : #include "commands/schemacmds.h"
53 : #include "commands/subscriptioncmds.h"
54 : #include "commands/tablecmds.h"
55 : #include "commands/tablespace.h"
56 : #include "commands/trigger.h"
57 : #include "commands/typecmds.h"
58 : #include "commands/user.h"
59 : #include "miscadmin.h"
60 : #include "replication/logicalworker.h"
61 : #include "rewrite/rewriteDefine.h"
62 : #include "storage/lmgr.h"
63 : #include "utils/acl.h"
64 : #include "utils/builtins.h"
65 : #include "utils/lsyscache.h"
66 : #include "utils/rel.h"
67 : #include "utils/syscache.h"
68 :
69 : static Oid AlterObjectNamespace_internal(Relation rel, Oid objid, Oid nspOid);
70 :
71 : /*
72 : * Raise an error to the effect that an object of the given name is already
73 : * present in the given namespace.
74 : */
75 : static void
76 24 : report_name_conflict(Oid classId, const char *name)
77 : {
78 : char *msgfmt;
79 :
80 24 : switch (classId)
81 : {
82 6 : case EventTriggerRelationId:
83 6 : msgfmt = gettext_noop("event trigger \"%s\" already exists");
84 6 : break;
85 6 : case ForeignDataWrapperRelationId:
86 6 : msgfmt = gettext_noop("foreign-data wrapper \"%s\" already exists");
87 6 : break;
88 6 : case ForeignServerRelationId:
89 6 : msgfmt = gettext_noop("server \"%s\" already exists");
90 6 : break;
91 6 : case LanguageRelationId:
92 6 : msgfmt = gettext_noop("language \"%s\" already exists");
93 6 : break;
94 0 : case PublicationRelationId:
95 0 : msgfmt = gettext_noop("publication \"%s\" already exists");
96 0 : break;
97 0 : case SubscriptionRelationId:
98 0 : msgfmt = gettext_noop("subscription \"%s\" already exists");
99 0 : break;
100 0 : default:
101 0 : elog(ERROR, "unsupported object class: %u", classId);
102 : break;
103 : }
104 :
105 24 : ereport(ERROR,
106 : (errcode(ERRCODE_DUPLICATE_OBJECT),
107 : errmsg(msgfmt, name)));
108 : }
109 :
110 : static void
111 72 : report_namespace_conflict(Oid classId, const char *name, Oid nspOid)
112 : {
113 : char *msgfmt;
114 :
115 : Assert(OidIsValid(nspOid));
116 :
117 72 : switch (classId)
118 : {
119 12 : case ConversionRelationId:
120 : Assert(OidIsValid(nspOid));
121 12 : msgfmt = gettext_noop("conversion \"%s\" already exists in schema \"%s\"");
122 12 : break;
123 12 : case StatisticExtRelationId:
124 : Assert(OidIsValid(nspOid));
125 12 : msgfmt = gettext_noop("statistics object \"%s\" already exists in schema \"%s\"");
126 12 : break;
127 12 : case TSParserRelationId:
128 : Assert(OidIsValid(nspOid));
129 12 : msgfmt = gettext_noop("text search parser \"%s\" already exists in schema \"%s\"");
130 12 : break;
131 12 : case TSDictionaryRelationId:
132 : Assert(OidIsValid(nspOid));
133 12 : msgfmt = gettext_noop("text search dictionary \"%s\" already exists in schema \"%s\"");
134 12 : break;
135 12 : case TSTemplateRelationId:
136 : Assert(OidIsValid(nspOid));
137 12 : msgfmt = gettext_noop("text search template \"%s\" already exists in schema \"%s\"");
138 12 : break;
139 12 : case TSConfigRelationId:
140 : Assert(OidIsValid(nspOid));
141 12 : msgfmt = gettext_noop("text search configuration \"%s\" already exists in schema \"%s\"");
142 12 : break;
143 0 : default:
144 0 : elog(ERROR, "unsupported object class: %u", classId);
145 : break;
146 : }
147 :
148 72 : ereport(ERROR,
149 : (errcode(ERRCODE_DUPLICATE_OBJECT),
150 : errmsg(msgfmt, name, get_namespace_name(nspOid))));
151 : }
152 :
153 : /*
154 : * AlterObjectRename_internal
155 : *
156 : * Generic function to rename the given object, for simple cases (won't
157 : * work for tables, nor other cases where we need to do more than change
158 : * the name column of a single catalog entry).
159 : *
160 : * rel: catalog relation containing object (RowExclusiveLock'd by caller)
161 : * objectId: OID of object to be renamed
162 : * new_name: CString representation of new name
163 : */
164 : static void
165 404 : AlterObjectRename_internal(Relation rel, Oid objectId, const char *new_name)
166 : {
167 404 : Oid classId = RelationGetRelid(rel);
168 404 : int oidCacheId = get_object_catcache_oid(classId);
169 404 : int nameCacheId = get_object_catcache_name(classId);
170 404 : AttrNumber Anum_name = get_object_attnum_name(classId);
171 404 : AttrNumber Anum_namespace = get_object_attnum_namespace(classId);
172 404 : AttrNumber Anum_owner = get_object_attnum_owner(classId);
173 : HeapTuple oldtup;
174 : HeapTuple newtup;
175 : Datum datum;
176 : bool isnull;
177 : Oid namespaceId;
178 : Oid ownerId;
179 : char *old_name;
180 : AclResult aclresult;
181 : Datum *values;
182 : bool *nulls;
183 : bool *replaces;
184 : NameData nameattrdata;
185 :
186 404 : oldtup = SearchSysCache1(oidCacheId, ObjectIdGetDatum(objectId));
187 404 : if (!HeapTupleIsValid(oldtup))
188 0 : elog(ERROR, "cache lookup failed for object %u of catalog \"%s\"",
189 : objectId, RelationGetRelationName(rel));
190 :
191 404 : datum = heap_getattr(oldtup, Anum_name,
192 : RelationGetDescr(rel), &isnull);
193 : Assert(!isnull);
194 404 : old_name = NameStr(*(DatumGetName(datum)));
195 :
196 : /* Get OID of namespace */
197 404 : if (Anum_namespace > 0)
198 : {
199 270 : datum = heap_getattr(oldtup, Anum_namespace,
200 : RelationGetDescr(rel), &isnull);
201 : Assert(!isnull);
202 270 : namespaceId = DatumGetObjectId(datum);
203 : }
204 : else
205 134 : namespaceId = InvalidOid;
206 :
207 : /* Permission checks ... superusers can always do it */
208 404 : if (!superuser())
209 : {
210 : /* Fail if object does not have an explicit owner */
211 246 : if (Anum_owner <= 0)
212 0 : ereport(ERROR,
213 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
214 : errmsg("must be superuser to rename %s",
215 : getObjectDescriptionOids(classId, objectId))));
216 :
217 : /* Otherwise, must be owner of the existing object */
218 246 : datum = heap_getattr(oldtup, Anum_owner,
219 : RelationGetDescr(rel), &isnull);
220 : Assert(!isnull);
221 246 : ownerId = DatumGetObjectId(datum);
222 :
223 246 : if (!has_privs_of_role(GetUserId(), DatumGetObjectId(ownerId)))
224 72 : aclcheck_error(ACLCHECK_NOT_OWNER, get_object_type(classId, objectId),
225 : old_name);
226 :
227 : /* User must have CREATE privilege on the namespace */
228 174 : if (OidIsValid(namespaceId))
229 : {
230 144 : aclresult = object_aclcheck(NamespaceRelationId, namespaceId, GetUserId(),
231 : ACL_CREATE);
232 144 : if (aclresult != ACLCHECK_OK)
233 0 : aclcheck_error(aclresult, OBJECT_SCHEMA,
234 0 : get_namespace_name(namespaceId));
235 : }
236 :
237 174 : if (classId == SubscriptionRelationId)
238 : {
239 : Form_pg_subscription form;
240 :
241 : /* must have CREATE privilege on database */
242 18 : aclresult = object_aclcheck(DatabaseRelationId, MyDatabaseId,
243 : GetUserId(), ACL_CREATE);
244 18 : if (aclresult != ACLCHECK_OK)
245 6 : aclcheck_error(aclresult, OBJECT_DATABASE,
246 6 : get_database_name(MyDatabaseId));
247 :
248 : /*
249 : * Don't allow non-superuser modification of a subscription with
250 : * password_required=false.
251 : */
252 12 : form = (Form_pg_subscription) GETSTRUCT(oldtup);
253 12 : if (!form->subpasswordrequired && !superuser())
254 0 : ereport(ERROR,
255 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
256 : errmsg("password_required=false is superuser-only"),
257 : errhint("Subscriptions with the password_required option set to false may only be created or modified by the superuser.")));
258 : }
259 : }
260 :
261 : /*
262 : * Check for duplicate name (more friendly than unique-index failure).
263 : * Since this is just a friendliness check, we can just skip it in cases
264 : * where there isn't suitable support.
265 : */
266 326 : if (classId == ProcedureRelationId)
267 : {
268 72 : Form_pg_proc proc = (Form_pg_proc) GETSTRUCT(oldtup);
269 :
270 72 : IsThereFunctionInNamespace(new_name, proc->pronargs,
271 : &proc->proargtypes, proc->pronamespace);
272 : }
273 254 : else if (classId == CollationRelationId)
274 : {
275 12 : Form_pg_collation coll = (Form_pg_collation) GETSTRUCT(oldtup);
276 :
277 12 : IsThereCollationInNamespace(new_name, coll->collnamespace);
278 : }
279 242 : else if (classId == OperatorClassRelationId)
280 : {
281 18 : Form_pg_opclass opc = (Form_pg_opclass) GETSTRUCT(oldtup);
282 :
283 18 : IsThereOpClassInNamespace(new_name, opc->opcmethod,
284 : opc->opcnamespace);
285 : }
286 224 : else if (classId == OperatorFamilyRelationId)
287 : {
288 18 : Form_pg_opfamily opf = (Form_pg_opfamily) GETSTRUCT(oldtup);
289 :
290 18 : IsThereOpFamilyInNamespace(new_name, opf->opfmethod,
291 : opf->opfnamespace);
292 : }
293 206 : else if (classId == SubscriptionRelationId)
294 : {
295 26 : if (SearchSysCacheExists2(SUBSCRIPTIONNAME,
296 : ObjectIdGetDatum(MyDatabaseId),
297 : CStringGetDatum(new_name)))
298 0 : report_name_conflict(classId, new_name);
299 :
300 : /* Also enforce regression testing naming rules, if enabled */
301 : #ifdef ENFORCE_REGRESSION_TEST_NAME_RESTRICTIONS
302 : if (strncmp(new_name, "regress_", 8) != 0)
303 : elog(WARNING, "subscriptions created by regression test cases should have names starting with \"regress_\"");
304 : #endif
305 :
306 : /* Wake up related replication workers to handle this change quickly */
307 26 : LogicalRepWorkersWakeupAtCommit(objectId);
308 : }
309 180 : else if (nameCacheId >= 0)
310 : {
311 180 : if (OidIsValid(namespaceId))
312 : {
313 96 : if (SearchSysCacheExists2(nameCacheId,
314 : CStringGetDatum(new_name),
315 : ObjectIdGetDatum(namespaceId)))
316 36 : report_namespace_conflict(classId, new_name, namespaceId);
317 : }
318 : else
319 : {
320 84 : if (SearchSysCacheExists1(nameCacheId,
321 : CStringGetDatum(new_name)))
322 24 : report_name_conflict(classId, new_name);
323 : }
324 : }
325 :
326 : /* Build modified tuple */
327 236 : values = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(Datum));
328 236 : nulls = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(bool));
329 236 : replaces = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(bool));
330 236 : namestrcpy(&nameattrdata, new_name);
331 236 : values[Anum_name - 1] = NameGetDatum(&nameattrdata);
332 236 : replaces[Anum_name - 1] = true;
333 236 : newtup = heap_modify_tuple(oldtup, RelationGetDescr(rel),
334 : values, nulls, replaces);
335 :
336 : /* Perform actual update */
337 236 : CatalogTupleUpdate(rel, &oldtup->t_self, newtup);
338 :
339 236 : InvokeObjectPostAlterHook(classId, objectId, 0);
340 :
341 : /* Release memory */
342 236 : pfree(values);
343 236 : pfree(nulls);
344 236 : pfree(replaces);
345 236 : heap_freetuple(newtup);
346 :
347 236 : ReleaseSysCache(oldtup);
348 236 : }
349 :
350 : /*
351 : * Executes an ALTER OBJECT / RENAME TO statement. Based on the object
352 : * type, the function appropriate to that type is executed.
353 : *
354 : * Return value is the address of the renamed object.
355 : */
356 : ObjectAddress
357 1512 : ExecRenameStmt(RenameStmt *stmt)
358 : {
359 1512 : switch (stmt->renameType)
360 : {
361 84 : case OBJECT_TABCONSTRAINT:
362 : case OBJECT_DOMCONSTRAINT:
363 84 : return RenameConstraint(stmt);
364 :
365 6 : case OBJECT_DATABASE:
366 6 : return RenameDatabase(stmt->subname, stmt->newname);
367 :
368 30 : case OBJECT_ROLE:
369 30 : return RenameRole(stmt->subname, stmt->newname);
370 :
371 20 : case OBJECT_SCHEMA:
372 20 : return RenameSchema(stmt->subname, stmt->newname);
373 :
374 6 : case OBJECT_TABLESPACE:
375 6 : return RenameTableSpace(stmt->subname, stmt->newname);
376 :
377 510 : case OBJECT_TABLE:
378 : case OBJECT_SEQUENCE:
379 : case OBJECT_VIEW:
380 : case OBJECT_MATVIEW:
381 : case OBJECT_INDEX:
382 : case OBJECT_FOREIGN_TABLE:
383 510 : return RenameRelation(stmt);
384 :
385 316 : case OBJECT_COLUMN:
386 : case OBJECT_ATTRIBUTE:
387 316 : return renameatt(stmt);
388 :
389 34 : case OBJECT_RULE:
390 34 : return RenameRewriteRule(stmt->relation, stmt->subname,
391 34 : stmt->newname);
392 :
393 40 : case OBJECT_TRIGGER:
394 40 : return renametrig(stmt);
395 :
396 18 : case OBJECT_POLICY:
397 18 : return rename_policy(stmt);
398 :
399 32 : case OBJECT_DOMAIN:
400 : case OBJECT_TYPE:
401 32 : return RenameType(stmt);
402 :
403 416 : case OBJECT_AGGREGATE:
404 : case OBJECT_COLLATION:
405 : case OBJECT_CONVERSION:
406 : case OBJECT_EVENT_TRIGGER:
407 : case OBJECT_FDW:
408 : case OBJECT_FOREIGN_SERVER:
409 : case OBJECT_FUNCTION:
410 : case OBJECT_OPCLASS:
411 : case OBJECT_OPFAMILY:
412 : case OBJECT_LANGUAGE:
413 : case OBJECT_PROCEDURE:
414 : case OBJECT_ROUTINE:
415 : case OBJECT_STATISTIC_EXT:
416 : case OBJECT_TSCONFIGURATION:
417 : case OBJECT_TSDICTIONARY:
418 : case OBJECT_TSPARSER:
419 : case OBJECT_TSTEMPLATE:
420 : case OBJECT_PUBLICATION:
421 : case OBJECT_SUBSCRIPTION:
422 : {
423 : ObjectAddress address;
424 : Relation catalog;
425 :
426 416 : address = get_object_address(stmt->renameType,
427 : stmt->object,
428 : NULL,
429 : AccessExclusiveLock, false);
430 :
431 404 : catalog = table_open(address.classId, RowExclusiveLock);
432 404 : AlterObjectRename_internal(catalog,
433 : address.objectId,
434 404 : stmt->newname);
435 236 : table_close(catalog, RowExclusiveLock);
436 :
437 236 : return address;
438 : }
439 :
440 0 : default:
441 0 : elog(ERROR, "unrecognized rename stmt type: %d",
442 : (int) stmt->renameType);
443 : return InvalidObjectAddress; /* keep compiler happy */
444 : }
445 : }
446 :
447 : /*
448 : * Executes an ALTER OBJECT / [NO] DEPENDS ON EXTENSION statement.
449 : *
450 : * Return value is the address of the altered object. refAddress is an output
451 : * argument which, if not null, receives the address of the object that the
452 : * altered object now depends on.
453 : */
454 : ObjectAddress
455 46 : ExecAlterObjectDependsStmt(AlterObjectDependsStmt *stmt, ObjectAddress *refAddress)
456 : {
457 : ObjectAddress address;
458 : ObjectAddress refAddr;
459 : Relation rel;
460 :
461 : address =
462 46 : get_object_address_rv(stmt->objectType, stmt->relation, (List *) stmt->object,
463 : &rel, AccessExclusiveLock, false);
464 :
465 : /*
466 : * Verify that the user is entitled to run the command.
467 : *
468 : * We don't check any privileges on the extension, because that's not
469 : * needed. The object owner is stipulating, by running this command, that
470 : * the extension owner can drop the object whenever they feel like it,
471 : * which is not considered a problem.
472 : */
473 46 : check_object_ownership(GetUserId(),
474 : stmt->objectType, address, stmt->object, rel);
475 :
476 : /*
477 : * If a relation was involved, it would have been opened and locked. We
478 : * don't need the relation here, but we'll retain the lock until commit.
479 : */
480 46 : if (rel)
481 34 : table_close(rel, NoLock);
482 :
483 46 : refAddr = get_object_address(OBJECT_EXTENSION, (Node *) stmt->extname,
484 : NULL, AccessExclusiveLock, false);
485 46 : if (refAddress)
486 46 : *refAddress = refAddr;
487 :
488 46 : if (stmt->remove)
489 : {
490 8 : deleteDependencyRecordsForSpecific(address.classId, address.objectId,
491 : DEPENDENCY_AUTO_EXTENSION,
492 : refAddr.classId, refAddr.objectId);
493 : }
494 : else
495 : {
496 : List *currexts;
497 :
498 : /* Avoid duplicates */
499 38 : currexts = getAutoExtensionsOfObject(address.classId,
500 : address.objectId);
501 38 : if (!list_member_oid(currexts, refAddr.objectId))
502 36 : recordDependencyOn(&address, &refAddr, DEPENDENCY_AUTO_EXTENSION);
503 : }
504 :
505 46 : return address;
506 : }
507 :
508 : /*
509 : * Executes an ALTER OBJECT / SET SCHEMA statement. Based on the object
510 : * type, the function appropriate to that type is executed.
511 : *
512 : * Return value is that of the altered object.
513 : *
514 : * oldSchemaAddr is an output argument which, if not NULL, is set to the object
515 : * address of the original schema.
516 : */
517 : ObjectAddress
518 398 : ExecAlterObjectSchemaStmt(AlterObjectSchemaStmt *stmt,
519 : ObjectAddress *oldSchemaAddr)
520 : {
521 : ObjectAddress address;
522 : Oid oldNspOid;
523 :
524 398 : switch (stmt->objectType)
525 : {
526 12 : case OBJECT_EXTENSION:
527 12 : address = AlterExtensionNamespace(strVal(stmt->object), stmt->newschema,
528 : oldSchemaAddr ? &oldNspOid : NULL);
529 8 : break;
530 :
531 104 : case OBJECT_FOREIGN_TABLE:
532 : case OBJECT_SEQUENCE:
533 : case OBJECT_TABLE:
534 : case OBJECT_VIEW:
535 : case OBJECT_MATVIEW:
536 104 : address = AlterTableNamespace(stmt,
537 : oldSchemaAddr ? &oldNspOid : NULL);
538 96 : break;
539 :
540 18 : case OBJECT_DOMAIN:
541 : case OBJECT_TYPE:
542 18 : address = AlterTypeNamespace(castNode(List, stmt->object), stmt->newschema,
543 : stmt->objectType,
544 : oldSchemaAddr ? &oldNspOid : NULL);
545 18 : break;
546 :
547 : /* generic code path */
548 264 : case OBJECT_AGGREGATE:
549 : case OBJECT_COLLATION:
550 : case OBJECT_CONVERSION:
551 : case OBJECT_FUNCTION:
552 : case OBJECT_OPERATOR:
553 : case OBJECT_OPCLASS:
554 : case OBJECT_OPFAMILY:
555 : case OBJECT_PROCEDURE:
556 : case OBJECT_ROUTINE:
557 : case OBJECT_STATISTIC_EXT:
558 : case OBJECT_TSCONFIGURATION:
559 : case OBJECT_TSDICTIONARY:
560 : case OBJECT_TSPARSER:
561 : case OBJECT_TSTEMPLATE:
562 : {
563 : Relation catalog;
564 : Oid classId;
565 : Oid nspOid;
566 :
567 264 : address = get_object_address(stmt->objectType,
568 : stmt->object,
569 : NULL,
570 : AccessExclusiveLock,
571 : false);
572 258 : classId = address.classId;
573 258 : catalog = table_open(classId, RowExclusiveLock);
574 258 : nspOid = LookupCreationNamespace(stmt->newschema);
575 :
576 258 : oldNspOid = AlterObjectNamespace_internal(catalog, address.objectId,
577 : nspOid);
578 144 : table_close(catalog, RowExclusiveLock);
579 : }
580 144 : break;
581 :
582 0 : default:
583 0 : elog(ERROR, "unrecognized AlterObjectSchemaStmt type: %d",
584 : (int) stmt->objectType);
585 : return InvalidObjectAddress; /* keep compiler happy */
586 : }
587 :
588 266 : if (oldSchemaAddr)
589 266 : ObjectAddressSet(*oldSchemaAddr, NamespaceRelationId, oldNspOid);
590 :
591 266 : return address;
592 : }
593 :
594 : /*
595 : * Change an object's namespace given its classOid and object Oid.
596 : *
597 : * Objects that don't have a namespace should be ignored, as should
598 : * dependent types such as array types.
599 : *
600 : * This function is currently used only by ALTER EXTENSION SET SCHEMA,
601 : * so it only needs to cover object kinds that can be members of an
602 : * extension, and it can silently ignore dependent types --- we assume
603 : * those will be moved when their parent object is moved.
604 : *
605 : * Returns the OID of the object's previous namespace, or InvalidOid if
606 : * object doesn't have a schema or was ignored due to being a dependent type.
607 : */
608 : Oid
609 42 : AlterObjectNamespace_oid(Oid classId, Oid objid, Oid nspOid,
610 : ObjectAddresses *objsMoved)
611 : {
612 42 : Oid oldNspOid = InvalidOid;
613 :
614 42 : switch (classId)
615 : {
616 2 : case RelationRelationId:
617 : {
618 : Relation rel;
619 :
620 2 : rel = relation_open(objid, AccessExclusiveLock);
621 2 : oldNspOid = RelationGetNamespace(rel);
622 :
623 2 : AlterTableNamespaceInternal(rel, oldNspOid, nspOid, objsMoved);
624 :
625 2 : relation_close(rel, NoLock);
626 2 : break;
627 : }
628 :
629 16 : case TypeRelationId:
630 16 : oldNspOid = AlterTypeNamespace_oid(objid, nspOid, true, objsMoved);
631 16 : break;
632 :
633 22 : case ProcedureRelationId:
634 : case CollationRelationId:
635 : case ConversionRelationId:
636 : case OperatorRelationId:
637 : case OperatorClassRelationId:
638 : case OperatorFamilyRelationId:
639 : case StatisticExtRelationId:
640 : case TSParserRelationId:
641 : case TSDictionaryRelationId:
642 : case TSTemplateRelationId:
643 : case TSConfigRelationId:
644 : {
645 : Relation catalog;
646 :
647 22 : catalog = table_open(classId, RowExclusiveLock);
648 :
649 22 : oldNspOid = AlterObjectNamespace_internal(catalog, objid,
650 : nspOid);
651 :
652 22 : table_close(catalog, RowExclusiveLock);
653 : }
654 22 : break;
655 :
656 42 : default:
657 : /* ignore object types that don't have schema-qualified names */
658 : Assert(get_object_attnum_namespace(classId) == InvalidAttrNumber);
659 : }
660 :
661 42 : return oldNspOid;
662 : }
663 :
664 : /*
665 : * Generic function to change the namespace of a given object, for simple
666 : * cases (won't work for tables, nor other cases where we need to do more
667 : * than change the namespace column of a single catalog entry).
668 : *
669 : * rel: catalog relation containing object (RowExclusiveLock'd by caller)
670 : * objid: OID of object to change the namespace of
671 : * nspOid: OID of new namespace
672 : *
673 : * Returns the OID of the object's previous namespace.
674 : */
675 : static Oid
676 280 : AlterObjectNamespace_internal(Relation rel, Oid objid, Oid nspOid)
677 : {
678 280 : Oid classId = RelationGetRelid(rel);
679 280 : int oidCacheId = get_object_catcache_oid(classId);
680 280 : int nameCacheId = get_object_catcache_name(classId);
681 280 : AttrNumber Anum_name = get_object_attnum_name(classId);
682 280 : AttrNumber Anum_namespace = get_object_attnum_namespace(classId);
683 280 : AttrNumber Anum_owner = get_object_attnum_owner(classId);
684 : Oid oldNspOid;
685 : Datum name,
686 : namespace;
687 : bool isnull;
688 : HeapTuple tup,
689 : newtup;
690 : Datum *values;
691 : bool *nulls;
692 : bool *replaces;
693 :
694 280 : tup = SearchSysCacheCopy1(oidCacheId, ObjectIdGetDatum(objid));
695 280 : if (!HeapTupleIsValid(tup)) /* should not happen */
696 0 : elog(ERROR, "cache lookup failed for object %u of catalog \"%s\"",
697 : objid, RelationGetRelationName(rel));
698 :
699 280 : name = heap_getattr(tup, Anum_name, RelationGetDescr(rel), &isnull);
700 : Assert(!isnull);
701 280 : namespace = heap_getattr(tup, Anum_namespace, RelationGetDescr(rel),
702 : &isnull);
703 : Assert(!isnull);
704 280 : oldNspOid = DatumGetObjectId(namespace);
705 :
706 : /*
707 : * If the object is already in the correct namespace, we don't need to do
708 : * anything except fire the object access hook.
709 : */
710 280 : if (oldNspOid == nspOid)
711 : {
712 6 : InvokeObjectPostAlterHook(classId, objid, 0);
713 6 : return oldNspOid;
714 : }
715 :
716 : /* Check basic namespace related issues */
717 274 : CheckSetNamespace(oldNspOid, nspOid);
718 :
719 : /* Permission checks ... superusers can always do it */
720 274 : if (!superuser())
721 : {
722 : Datum owner;
723 : Oid ownerId;
724 : AclResult aclresult;
725 :
726 : /* Fail if object does not have an explicit owner */
727 156 : if (Anum_owner <= 0)
728 0 : ereport(ERROR,
729 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
730 : errmsg("must be superuser to set schema of %s",
731 : getObjectDescriptionOids(classId, objid))));
732 :
733 : /* Otherwise, must be owner of the existing object */
734 156 : owner = heap_getattr(tup, Anum_owner, RelationGetDescr(rel), &isnull);
735 : Assert(!isnull);
736 156 : ownerId = DatumGetObjectId(owner);
737 :
738 156 : if (!has_privs_of_role(GetUserId(), ownerId))
739 54 : aclcheck_error(ACLCHECK_NOT_OWNER, get_object_type(classId, objid),
740 54 : NameStr(*(DatumGetName(name))));
741 :
742 : /* User must have CREATE privilege on new namespace */
743 102 : aclresult = object_aclcheck(NamespaceRelationId, nspOid, GetUserId(), ACL_CREATE);
744 102 : if (aclresult != ACLCHECK_OK)
745 0 : aclcheck_error(aclresult, OBJECT_SCHEMA,
746 0 : get_namespace_name(nspOid));
747 : }
748 :
749 : /*
750 : * Check for duplicate name (more friendly than unique-index failure).
751 : * Since this is just a friendliness check, we can just skip it in cases
752 : * where there isn't suitable support.
753 : */
754 220 : if (classId == ProcedureRelationId)
755 : {
756 64 : Form_pg_proc proc = (Form_pg_proc) GETSTRUCT(tup);
757 :
758 64 : IsThereFunctionInNamespace(NameStr(proc->proname), proc->pronargs,
759 : &proc->proargtypes, nspOid);
760 : }
761 156 : else if (classId == CollationRelationId)
762 : {
763 6 : Form_pg_collation coll = (Form_pg_collation) GETSTRUCT(tup);
764 :
765 6 : IsThereCollationInNamespace(NameStr(coll->collname), nspOid);
766 : }
767 150 : else if (classId == OperatorClassRelationId)
768 : {
769 18 : Form_pg_opclass opc = (Form_pg_opclass) GETSTRUCT(tup);
770 :
771 18 : IsThereOpClassInNamespace(NameStr(opc->opcname),
772 : opc->opcmethod, nspOid);
773 : }
774 132 : else if (classId == OperatorFamilyRelationId)
775 : {
776 18 : Form_pg_opfamily opf = (Form_pg_opfamily) GETSTRUCT(tup);
777 :
778 18 : IsThereOpFamilyInNamespace(NameStr(opf->opfname),
779 : opf->opfmethod, nspOid);
780 : }
781 216 : else if (nameCacheId >= 0 &&
782 102 : SearchSysCacheExists2(nameCacheId, name,
783 : ObjectIdGetDatum(nspOid)))
784 36 : report_namespace_conflict(classId,
785 36 : NameStr(*(DatumGetName(name))),
786 : nspOid);
787 :
788 : /* Build modified tuple */
789 160 : values = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(Datum));
790 160 : nulls = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(bool));
791 160 : replaces = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(bool));
792 160 : values[Anum_namespace - 1] = ObjectIdGetDatum(nspOid);
793 160 : replaces[Anum_namespace - 1] = true;
794 160 : newtup = heap_modify_tuple(tup, RelationGetDescr(rel),
795 : values, nulls, replaces);
796 :
797 : /* Perform actual update */
798 160 : CatalogTupleUpdate(rel, &tup->t_self, newtup);
799 :
800 : /* Release memory */
801 160 : pfree(values);
802 160 : pfree(nulls);
803 160 : pfree(replaces);
804 :
805 : /* update dependency to point to the new schema */
806 160 : if (changeDependencyFor(classId, objid,
807 : NamespaceRelationId, oldNspOid, nspOid) != 1)
808 0 : elog(ERROR, "could not change schema dependency for object %u",
809 : objid);
810 :
811 160 : InvokeObjectPostAlterHook(classId, objid, 0);
812 :
813 160 : return oldNspOid;
814 : }
815 :
816 : /*
817 : * Executes an ALTER OBJECT / OWNER TO statement. Based on the object
818 : * type, the function appropriate to that type is executed.
819 : */
820 : ObjectAddress
821 1572 : ExecAlterOwnerStmt(AlterOwnerStmt *stmt)
822 : {
823 1572 : Oid newowner = get_rolespec_oid(stmt->newowner, false);
824 :
825 1560 : switch (stmt->objectType)
826 : {
827 50 : case OBJECT_DATABASE:
828 50 : return AlterDatabaseOwner(strVal(stmt->object), newowner);
829 :
830 54 : case OBJECT_SCHEMA:
831 54 : return AlterSchemaOwner(strVal(stmt->object), newowner);
832 :
833 120 : case OBJECT_TYPE:
834 : case OBJECT_DOMAIN: /* same as TYPE */
835 120 : return AlterTypeOwner(castNode(List, stmt->object), newowner, stmt->objectType);
836 : break;
837 :
838 20 : case OBJECT_FDW:
839 20 : return AlterForeignDataWrapperOwner(strVal(stmt->object),
840 : newowner);
841 :
842 68 : case OBJECT_FOREIGN_SERVER:
843 68 : return AlterForeignServerOwner(strVal(stmt->object),
844 : newowner);
845 :
846 14 : case OBJECT_EVENT_TRIGGER:
847 14 : return AlterEventTriggerOwner(strVal(stmt->object),
848 : newowner);
849 :
850 26 : case OBJECT_PUBLICATION:
851 26 : return AlterPublicationOwner(strVal(stmt->object),
852 : newowner);
853 :
854 18 : case OBJECT_SUBSCRIPTION:
855 18 : return AlterSubscriptionOwner(strVal(stmt->object),
856 : newowner);
857 :
858 : /* Generic cases */
859 1190 : case OBJECT_AGGREGATE:
860 : case OBJECT_COLLATION:
861 : case OBJECT_CONVERSION:
862 : case OBJECT_FUNCTION:
863 : case OBJECT_LANGUAGE:
864 : case OBJECT_LARGEOBJECT:
865 : case OBJECT_OPERATOR:
866 : case OBJECT_OPCLASS:
867 : case OBJECT_OPFAMILY:
868 : case OBJECT_PROCEDURE:
869 : case OBJECT_ROUTINE:
870 : case OBJECT_STATISTIC_EXT:
871 : case OBJECT_TABLESPACE:
872 : case OBJECT_TSDICTIONARY:
873 : case OBJECT_TSCONFIGURATION:
874 : {
875 : ObjectAddress address;
876 :
877 1190 : address = get_object_address(stmt->objectType,
878 : stmt->object,
879 : NULL,
880 : AccessExclusiveLock,
881 : false);
882 :
883 1182 : AlterObjectOwner_internal(address.classId, address.objectId,
884 : newowner);
885 :
886 1008 : return address;
887 : }
888 : break;
889 :
890 0 : default:
891 0 : elog(ERROR, "unrecognized AlterOwnerStmt type: %d",
892 : (int) stmt->objectType);
893 : return InvalidObjectAddress; /* keep compiler happy */
894 : }
895 : }
896 :
897 : /*
898 : * Generic function to change the ownership of a given object, for simple
899 : * cases (won't work for tables, nor other cases where we need to do more than
900 : * change the ownership column of a single catalog entry).
901 : *
902 : * classId: OID of catalog containing object
903 : * objectId: OID of object to change the ownership of
904 : * new_ownerId: OID of new object owner
905 : *
906 : * This will work on large objects, but we have to beware of the fact that
907 : * classId isn't the OID of the catalog to modify in that case.
908 : */
909 : void
910 1202 : AlterObjectOwner_internal(Oid classId, Oid objectId, Oid new_ownerId)
911 : {
912 : /* For large objects, the catalog to modify is pg_largeobject_metadata */
913 1202 : Oid catalogId = (classId == LargeObjectRelationId) ? LargeObjectMetadataRelationId : classId;
914 1202 : AttrNumber Anum_oid = get_object_attnum_oid(catalogId);
915 1202 : AttrNumber Anum_owner = get_object_attnum_owner(catalogId);
916 1202 : AttrNumber Anum_namespace = get_object_attnum_namespace(catalogId);
917 1202 : AttrNumber Anum_acl = get_object_attnum_acl(catalogId);
918 1202 : AttrNumber Anum_name = get_object_attnum_name(catalogId);
919 : Relation rel;
920 : HeapTuple oldtup;
921 : Datum datum;
922 : bool isnull;
923 : Oid old_ownerId;
924 1202 : Oid namespaceId = InvalidOid;
925 :
926 1202 : rel = table_open(catalogId, RowExclusiveLock);
927 :
928 : /* Search tuple and lock it. */
929 : oldtup =
930 1202 : get_catalog_object_by_oid_extended(rel, Anum_oid, objectId, true);
931 1202 : if (oldtup == NULL)
932 0 : elog(ERROR, "cache lookup failed for object %u of catalog \"%s\"",
933 : objectId, RelationGetRelationName(rel));
934 :
935 1202 : datum = heap_getattr(oldtup, Anum_owner,
936 : RelationGetDescr(rel), &isnull);
937 : Assert(!isnull);
938 1202 : old_ownerId = DatumGetObjectId(datum);
939 :
940 1202 : if (Anum_namespace != InvalidAttrNumber)
941 : {
942 1044 : datum = heap_getattr(oldtup, Anum_namespace,
943 : RelationGetDescr(rel), &isnull);
944 : Assert(!isnull);
945 1044 : namespaceId = DatumGetObjectId(datum);
946 : }
947 :
948 1202 : if (old_ownerId != new_ownerId)
949 : {
950 : AttrNumber nattrs;
951 : HeapTuple newtup;
952 : Datum *values;
953 : bool *nulls;
954 : bool *replaces;
955 :
956 : /* Superusers can bypass permission checks */
957 372 : if (!superuser())
958 : {
959 : /* must be owner */
960 234 : if (!has_privs_of_role(GetUserId(), old_ownerId))
961 : {
962 : char *objname;
963 : char namebuf[NAMEDATALEN];
964 :
965 60 : if (Anum_name != InvalidAttrNumber)
966 : {
967 60 : datum = heap_getattr(oldtup, Anum_name,
968 : RelationGetDescr(rel), &isnull);
969 : Assert(!isnull);
970 60 : objname = NameStr(*DatumGetName(datum));
971 : }
972 : else
973 : {
974 0 : snprintf(namebuf, sizeof(namebuf), "%u", objectId);
975 0 : objname = namebuf;
976 : }
977 60 : aclcheck_error(ACLCHECK_NOT_OWNER,
978 : get_object_type(catalogId, objectId),
979 : objname);
980 : }
981 : /* Must be able to become new owner */
982 174 : check_can_set_role(GetUserId(), new_ownerId);
983 :
984 : /* New owner must have CREATE privilege on namespace */
985 60 : if (OidIsValid(namespaceId))
986 : {
987 : AclResult aclresult;
988 :
989 54 : aclresult = object_aclcheck(NamespaceRelationId, namespaceId, new_ownerId,
990 : ACL_CREATE);
991 54 : if (aclresult != ACLCHECK_OK)
992 0 : aclcheck_error(aclresult, OBJECT_SCHEMA,
993 0 : get_namespace_name(namespaceId));
994 : }
995 : }
996 :
997 : /* Build a modified tuple */
998 198 : nattrs = RelationGetNumberOfAttributes(rel);
999 198 : values = palloc0(nattrs * sizeof(Datum));
1000 198 : nulls = palloc0(nattrs * sizeof(bool));
1001 198 : replaces = palloc0(nattrs * sizeof(bool));
1002 198 : values[Anum_owner - 1] = ObjectIdGetDatum(new_ownerId);
1003 198 : replaces[Anum_owner - 1] = true;
1004 :
1005 : /*
1006 : * Determine the modified ACL for the new owner. This is only
1007 : * necessary when the ACL is non-null.
1008 : */
1009 198 : if (Anum_acl != InvalidAttrNumber)
1010 : {
1011 100 : datum = heap_getattr(oldtup,
1012 : Anum_acl, RelationGetDescr(rel), &isnull);
1013 100 : if (!isnull)
1014 : {
1015 : Acl *newAcl;
1016 :
1017 8 : newAcl = aclnewowner(DatumGetAclP(datum),
1018 : old_ownerId, new_ownerId);
1019 8 : values[Anum_acl - 1] = PointerGetDatum(newAcl);
1020 8 : replaces[Anum_acl - 1] = true;
1021 : }
1022 : }
1023 :
1024 198 : newtup = heap_modify_tuple(oldtup, RelationGetDescr(rel),
1025 : values, nulls, replaces);
1026 :
1027 : /* Perform actual update */
1028 198 : CatalogTupleUpdate(rel, &newtup->t_self, newtup);
1029 :
1030 198 : UnlockTuple(rel, &oldtup->t_self, InplaceUpdateTupleLock);
1031 :
1032 : /* Update owner dependency reference */
1033 198 : changeDependencyOnOwner(classId, objectId, new_ownerId);
1034 :
1035 : /* Release memory */
1036 198 : pfree(values);
1037 198 : pfree(nulls);
1038 198 : pfree(replaces);
1039 : }
1040 : else
1041 830 : UnlockTuple(rel, &oldtup->t_self, InplaceUpdateTupleLock);
1042 :
1043 : /* Note the post-alter hook gets classId not catalogId */
1044 1028 : InvokeObjectPostAlterHook(classId, objectId, 0);
1045 :
1046 1028 : table_close(rel, RowExclusiveLock);
1047 1028 : }
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