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opclasscmds.c
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1 /*-------------------------------------------------------------------------
2  *
3  * opclasscmds.c
4  *
5  * Routines for opclass (and opfamily) manipulation commands
6  *
7  * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
8  * Portions Copyright (c) 1994, Regents of the University of California
9  *
10  *
11  * IDENTIFICATION
12  * src/backend/commands/opclasscmds.c
13  *
14  *-------------------------------------------------------------------------
15  */
16 #include "postgres.h"
17 
18 #include <limits.h>
19 
20 #include "access/genam.h"
21 #include "access/hash.h"
22 #include "access/heapam.h"
23 #include "access/nbtree.h"
24 #include "access/htup_details.h"
25 #include "access/sysattr.h"
26 #include "catalog/dependency.h"
27 #include "catalog/indexing.h"
28 #include "catalog/objectaccess.h"
29 #include "catalog/opfam_internal.h"
30 #include "catalog/pg_am.h"
31 #include "catalog/pg_amop.h"
32 #include "catalog/pg_amproc.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_type.h"
39 #include "commands/alter.h"
40 #include "commands/defrem.h"
41 #include "commands/event_trigger.h"
42 #include "miscadmin.h"
43 #include "parser/parse_func.h"
44 #include "parser/parse_oper.h"
45 #include "parser/parse_type.h"
46 #include "utils/builtins.h"
47 #include "utils/fmgroids.h"
48 #include "utils/lsyscache.h"
49 #include "utils/rel.h"
50 #include "utils/syscache.h"
51 #include "utils/tqual.h"
52 
53 
54 static void AlterOpFamilyAdd(AlterOpFamilyStmt *stmt,
55  Oid amoid, Oid opfamilyoid,
56  int maxOpNumber, int maxProcNumber,
57  List *items);
58 static void AlterOpFamilyDrop(AlterOpFamilyStmt *stmt,
59  Oid amoid, Oid opfamilyoid,
60  int maxOpNumber, int maxProcNumber,
61  List *items);
62 static void processTypesSpec(List *args, Oid *lefttype, Oid *righttype);
63 static void assignOperTypes(OpFamilyMember *member, Oid amoid, Oid typeoid);
64 static void assignProcTypes(OpFamilyMember *member, Oid amoid, Oid typeoid);
65 static void addFamilyMember(List **list, OpFamilyMember *member, bool isProc);
66 static void storeOperators(List *opfamilyname, Oid amoid,
67  Oid opfamilyoid, Oid opclassoid,
68  List *operators, bool isAdd);
69 static void storeProcedures(List *opfamilyname, Oid amoid,
70  Oid opfamilyoid, Oid opclassoid,
71  List *procedures, bool isAdd);
72 static void dropOperators(List *opfamilyname, Oid amoid, Oid opfamilyoid,
73  List *operators);
74 static void dropProcedures(List *opfamilyname, Oid amoid, Oid opfamilyoid,
75  List *procedures);
76 
77 /*
78  * OpFamilyCacheLookup
79  * Look up an existing opfamily by name.
80  *
81  * Returns a syscache tuple reference, or NULL if not found.
82  */
83 static HeapTuple
84 OpFamilyCacheLookup(Oid amID, List *opfamilyname, bool missing_ok)
85 {
86  char *schemaname;
87  char *opfname;
88  HeapTuple htup;
89 
90  /* deconstruct the name list */
91  DeconstructQualifiedName(opfamilyname, &schemaname, &opfname);
92 
93  if (schemaname)
94  {
95  /* Look in specific schema only */
96  Oid namespaceId;
97 
98  namespaceId = LookupExplicitNamespace(schemaname, missing_ok);
99  if (!OidIsValid(namespaceId))
100  htup = NULL;
101  else
103  ObjectIdGetDatum(amID),
104  PointerGetDatum(opfname),
105  ObjectIdGetDatum(namespaceId));
106  }
107  else
108  {
109  /* Unqualified opfamily name, so search the search path */
110  Oid opfID = OpfamilynameGetOpfid(amID, opfname);
111 
112  if (!OidIsValid(opfID))
113  htup = NULL;
114  else
116  }
117 
118  if (!HeapTupleIsValid(htup) && !missing_ok)
119  {
120  HeapTuple amtup;
121 
122  amtup = SearchSysCache1(AMOID, ObjectIdGetDatum(amID));
123  if (!HeapTupleIsValid(amtup))
124  elog(ERROR, "cache lookup failed for access method %u", amID);
125  ereport(ERROR,
126  (errcode(ERRCODE_UNDEFINED_OBJECT),
127  errmsg("operator family \"%s\" does not exist for access method \"%s\"",
128  NameListToString(opfamilyname),
129  NameStr(((Form_pg_am) GETSTRUCT(amtup))->amname))));
130  }
131 
132  return htup;
133 }
134 
135 /*
136  * get_opfamily_oid
137  * find an opfamily OID by possibly qualified name
138  *
139  * If not found, returns InvalidOid if missing_ok, else throws error.
140  */
141 Oid
142 get_opfamily_oid(Oid amID, List *opfamilyname, bool missing_ok)
143 {
144  HeapTuple htup;
145  Oid opfID;
146 
147  htup = OpFamilyCacheLookup(amID, opfamilyname, missing_ok);
148  if (!HeapTupleIsValid(htup))
149  return InvalidOid;
150  opfID = HeapTupleGetOid(htup);
151  ReleaseSysCache(htup);
152 
153  return opfID;
154 }
155 
156 /*
157  * OpClassCacheLookup
158  * Look up an existing opclass by name.
159  *
160  * Returns a syscache tuple reference, or NULL if not found.
161  */
162 static HeapTuple
163 OpClassCacheLookup(Oid amID, List *opclassname, bool missing_ok)
164 {
165  char *schemaname;
166  char *opcname;
167  HeapTuple htup;
168 
169  /* deconstruct the name list */
170  DeconstructQualifiedName(opclassname, &schemaname, &opcname);
171 
172  if (schemaname)
173  {
174  /* Look in specific schema only */
175  Oid namespaceId;
176 
177  namespaceId = LookupExplicitNamespace(schemaname, missing_ok);
178  if (!OidIsValid(namespaceId))
179  htup = NULL;
180  else
182  ObjectIdGetDatum(amID),
183  PointerGetDatum(opcname),
184  ObjectIdGetDatum(namespaceId));
185  }
186  else
187  {
188  /* Unqualified opclass name, so search the search path */
189  Oid opcID = OpclassnameGetOpcid(amID, opcname);
190 
191  if (!OidIsValid(opcID))
192  htup = NULL;
193  else
194  htup = SearchSysCache1(CLAOID, ObjectIdGetDatum(opcID));
195  }
196 
197  if (!HeapTupleIsValid(htup) && !missing_ok)
198  {
199  HeapTuple amtup;
200 
201  amtup = SearchSysCache1(AMOID, ObjectIdGetDatum(amID));
202  if (!HeapTupleIsValid(amtup))
203  elog(ERROR, "cache lookup failed for access method %u", amID);
204  ereport(ERROR,
205  (errcode(ERRCODE_UNDEFINED_OBJECT),
206  errmsg("operator class \"%s\" does not exist for access method \"%s\"",
207  NameListToString(opclassname),
208  NameStr(((Form_pg_am) GETSTRUCT(amtup))->amname))));
209  }
210 
211  return htup;
212 }
213 
214 /*
215  * get_opclass_oid
216  * find an opclass OID by possibly qualified name
217  *
218  * If not found, returns InvalidOid if missing_ok, else throws error.
219  */
220 Oid
221 get_opclass_oid(Oid amID, List *opclassname, bool missing_ok)
222 {
223  HeapTuple htup;
224  Oid opcID;
225 
226  htup = OpClassCacheLookup(amID, opclassname, missing_ok);
227  if (!HeapTupleIsValid(htup))
228  return InvalidOid;
229  opcID = HeapTupleGetOid(htup);
230  ReleaseSysCache(htup);
231 
232  return opcID;
233 }
234 
235 /*
236  * CreateOpFamily
237  * Internal routine to make the catalog entry for a new operator family.
238  *
239  * Caller must have done permissions checks etc. already.
240  */
241 static ObjectAddress
242 CreateOpFamily(const char *amname, const char *opfname, Oid namespaceoid, Oid amoid)
243 {
244  Oid opfamilyoid;
245  Relation rel;
246  HeapTuple tup;
248  bool nulls[Natts_pg_opfamily];
249  NameData opfName;
250  ObjectAddress myself,
251  referenced;
252 
254 
255  /*
256  * Make sure there is no existing opfamily of this name (this is just to
257  * give a more friendly error message than "duplicate key").
258  */
260  ObjectIdGetDatum(amoid),
261  CStringGetDatum(opfname),
262  ObjectIdGetDatum(namespaceoid)))
263  ereport(ERROR,
265  errmsg("operator family \"%s\" for access method \"%s\" already exists",
266  opfname, amname)));
267 
268  /*
269  * Okay, let's create the pg_opfamily entry.
270  */
271  memset(values, 0, sizeof(values));
272  memset(nulls, false, sizeof(nulls));
273 
274  values[Anum_pg_opfamily_opfmethod - 1] = ObjectIdGetDatum(amoid);
275  namestrcpy(&opfName, opfname);
276  values[Anum_pg_opfamily_opfname - 1] = NameGetDatum(&opfName);
277  values[Anum_pg_opfamily_opfnamespace - 1] = ObjectIdGetDatum(namespaceoid);
279 
280  tup = heap_form_tuple(rel->rd_att, values, nulls);
281 
282  opfamilyoid = CatalogTupleInsert(rel, tup);
283 
284  heap_freetuple(tup);
285 
286  /*
287  * Create dependencies for the opfamily proper.
288  */
290  myself.objectId = opfamilyoid;
291  myself.objectSubId = 0;
292 
293  /* dependency on access method */
294  referenced.classId = AccessMethodRelationId;
295  referenced.objectId = amoid;
296  referenced.objectSubId = 0;
297  recordDependencyOn(&myself, &referenced, DEPENDENCY_AUTO);
298 
299  /* dependency on namespace */
300  referenced.classId = NamespaceRelationId;
301  referenced.objectId = namespaceoid;
302  referenced.objectSubId = 0;
303  recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
304 
305  /* dependency on owner */
307 
308  /* dependency on extension */
309  recordDependencyOnCurrentExtension(&myself, false);
310 
311  /* Post creation hook for new operator family */
313 
315 
316  return myself;
317 }
318 
319 /*
320  * DefineOpClass
321  * Define a new index operator class.
322  */
325 {
326  char *opcname; /* name of opclass we're creating */
327  Oid amoid, /* our AM's oid */
328  typeoid, /* indexable datatype oid */
329  storageoid, /* storage datatype oid, if any */
330  namespaceoid, /* namespace to create opclass in */
331  opfamilyoid, /* oid of containing opfamily */
332  opclassoid; /* oid of opclass we create */
333  int maxOpNumber, /* amstrategies value */
334  maxProcNumber; /* amsupport value */
335  bool amstorage; /* amstorage flag */
336  List *operators; /* OpFamilyMember list for operators */
337  List *procedures; /* OpFamilyMember list for support procs */
338  ListCell *l;
339  Relation rel;
340  HeapTuple tup;
341  IndexAmRoutine *amroutine;
343  bool nulls[Natts_pg_opclass];
344  AclResult aclresult;
345  NameData opcName;
346  ObjectAddress myself,
347  referenced;
348 
349  /* Convert list of names to a name and namespace */
350  namespaceoid = QualifiedNameGetCreationNamespace(stmt->opclassname,
351  &opcname);
352 
353  /* Check we have creation rights in target namespace */
354  aclresult = pg_namespace_aclcheck(namespaceoid, GetUserId(), ACL_CREATE);
355  if (aclresult != ACLCHECK_OK)
357  get_namespace_name(namespaceoid));
358 
359  /* Get necessary info about access method */
361  if (!HeapTupleIsValid(tup))
362  ereport(ERROR,
363  (errcode(ERRCODE_UNDEFINED_OBJECT),
364  errmsg("access method \"%s\" does not exist",
365  stmt->amname)));
366 
367  amoid = HeapTupleGetOid(tup);
368  amroutine = GetIndexAmRoutineByAmId(amoid, false);
369  ReleaseSysCache(tup);
370 
371  maxOpNumber = amroutine->amstrategies;
372  /* if amstrategies is zero, just enforce that op numbers fit in int16 */
373  if (maxOpNumber <= 0)
374  maxOpNumber = SHRT_MAX;
375  maxProcNumber = amroutine->amsupport;
376  amstorage = amroutine->amstorage;
377 
378  /* XXX Should we make any privilege check against the AM? */
379 
380  /*
381  * The question of appropriate permissions for CREATE OPERATOR CLASS is
382  * interesting. Creating an opclass is tantamount to granting public
383  * execute access on the functions involved, since the index machinery
384  * generally does not check access permission before using the functions.
385  * A minimum expectation therefore is that the caller have execute
386  * privilege with grant option. Since we don't have a way to make the
387  * opclass go away if the grant option is revoked, we choose instead to
388  * require ownership of the functions. It's also not entirely clear what
389  * permissions should be required on the datatype, but ownership seems
390  * like a safe choice.
391  *
392  * Currently, we require superuser privileges to create an opclass. This
393  * seems necessary because we have no way to validate that the offered set
394  * of operators and functions are consistent with the AM's expectations.
395  * It would be nice to provide such a check someday, if it can be done
396  * without solving the halting problem :-(
397  *
398  * XXX re-enable NOT_USED code sections below if you remove this test.
399  */
400  if (!superuser())
401  ereport(ERROR,
402  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
403  errmsg("must be superuser to create an operator class")));
404 
405  /* Look up the datatype */
406  typeoid = typenameTypeId(NULL, stmt->datatype);
407 
408 #ifdef NOT_USED
409  /* XXX this is unnecessary given the superuser check above */
410  /* Check we have ownership of the datatype */
411  if (!pg_type_ownercheck(typeoid, GetUserId()))
413 #endif
414 
415  /*
416  * Look up the containing operator family, or create one if FAMILY option
417  * was omitted and there's not a match already.
418  */
419  if (stmt->opfamilyname)
420  {
421  opfamilyoid = get_opfamily_oid(amoid, stmt->opfamilyname, false);
422  }
423  else
424  {
425  /* Lookup existing family of same name and namespace */
427  ObjectIdGetDatum(amoid),
428  PointerGetDatum(opcname),
429  ObjectIdGetDatum(namespaceoid));
430  if (HeapTupleIsValid(tup))
431  {
432  opfamilyoid = HeapTupleGetOid(tup);
433 
434  /*
435  * XXX given the superuser check above, there's no need for an
436  * ownership check here
437  */
438  ReleaseSysCache(tup);
439  }
440  else
441  {
442  ObjectAddress tmpAddr;
443 
444  /*
445  * Create it ... again no need for more permissions ...
446  */
447  tmpAddr = CreateOpFamily(stmt->amname, opcname,
448  namespaceoid, amoid);
449  opfamilyoid = tmpAddr.objectId;
450  }
451  }
452 
453  operators = NIL;
454  procedures = NIL;
455 
456  /* Storage datatype is optional */
457  storageoid = InvalidOid;
458 
459  /*
460  * Scan the "items" list to obtain additional info.
461  */
462  foreach(l, stmt->items)
463  {
465  Oid operOid;
466  Oid funcOid;
467  Oid sortfamilyOid;
468  OpFamilyMember *member;
469 
470  switch (item->itemtype)
471  {
473  if (item->number <= 0 || item->number > maxOpNumber)
474  ereport(ERROR,
475  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
476  errmsg("invalid operator number %d,"
477  " must be between 1 and %d",
478  item->number, maxOpNumber)));
479  if (item->name->objargs != NIL)
480  operOid = LookupOperWithArgs(item->name, false);
481  else
482  {
483  /* Default to binary op on input datatype */
484  operOid = LookupOperName(NULL, item->name->objname,
485  typeoid, typeoid,
486  false, -1);
487  }
488 
489  if (item->order_family)
490  sortfamilyOid = get_opfamily_oid(BTREE_AM_OID,
491  item->order_family,
492  false);
493  else
494  sortfamilyOid = InvalidOid;
495 
496 #ifdef NOT_USED
497  /* XXX this is unnecessary given the superuser check above */
498  /* Caller must own operator and its underlying function */
499  if (!pg_oper_ownercheck(operOid, GetUserId()))
501  get_opname(operOid));
502  funcOid = get_opcode(operOid);
503  if (!pg_proc_ownercheck(funcOid, GetUserId()))
505  get_func_name(funcOid));
506 #endif
507 
508  /* Save the info */
509  member = (OpFamilyMember *) palloc0(sizeof(OpFamilyMember));
510  member->object = operOid;
511  member->number = item->number;
512  member->sortfamily = sortfamilyOid;
513  assignOperTypes(member, amoid, typeoid);
514  addFamilyMember(&operators, member, false);
515  break;
517  if (item->number <= 0 || item->number > maxProcNumber)
518  ereport(ERROR,
519  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
520  errmsg("invalid procedure number %d,"
521  " must be between 1 and %d",
522  item->number, maxProcNumber)));
523  funcOid = LookupFuncWithArgs(OBJECT_FUNCTION, item->name, false);
524 #ifdef NOT_USED
525  /* XXX this is unnecessary given the superuser check above */
526  /* Caller must own function */
527  if (!pg_proc_ownercheck(funcOid, GetUserId()))
529  get_func_name(funcOid));
530 #endif
531 
532  /* Save the info */
533  member = (OpFamilyMember *) palloc0(sizeof(OpFamilyMember));
534  member->object = funcOid;
535  member->number = item->number;
536 
537  /* allow overriding of the function's actual arg types */
538  if (item->class_args)
540  &member->lefttype, &member->righttype);
541 
542  assignProcTypes(member, amoid, typeoid);
543  addFamilyMember(&procedures, member, true);
544  break;
546  if (OidIsValid(storageoid))
547  ereport(ERROR,
548  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
549  errmsg("storage type specified more than once")));
550  storageoid = typenameTypeId(NULL, item->storedtype);
551 
552 #ifdef NOT_USED
553  /* XXX this is unnecessary given the superuser check above */
554  /* Check we have ownership of the datatype */
555  if (!pg_type_ownercheck(storageoid, GetUserId()))
557 #endif
558  break;
559  default:
560  elog(ERROR, "unrecognized item type: %d", item->itemtype);
561  break;
562  }
563  }
564 
565  /*
566  * If storagetype is specified, make sure it's legal.
567  */
568  if (OidIsValid(storageoid))
569  {
570  /* Just drop the spec if same as column datatype */
571  if (storageoid == typeoid)
572  storageoid = InvalidOid;
573  else if (!amstorage)
574  ereport(ERROR,
575  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
576  errmsg("storage type cannot be different from data type for access method \"%s\"",
577  stmt->amname)));
578  }
579 
581 
582  /*
583  * Make sure there is no existing opclass of this name (this is just to
584  * give a more friendly error message than "duplicate key").
585  */
587  ObjectIdGetDatum(amoid),
588  CStringGetDatum(opcname),
589  ObjectIdGetDatum(namespaceoid)))
590  ereport(ERROR,
592  errmsg("operator class \"%s\" for access method \"%s\" already exists",
593  opcname, stmt->amname)));
594 
595  /*
596  * If we are creating a default opclass, check there isn't one already.
597  * (Note we do not restrict this test to visible opclasses; this ensures
598  * that typcache.c can find unique solutions to its questions.)
599  */
600  if (stmt->isDefault)
601  {
602  ScanKeyData skey[1];
603  SysScanDesc scan;
604 
605  ScanKeyInit(&skey[0],
607  BTEqualStrategyNumber, F_OIDEQ,
608  ObjectIdGetDatum(amoid));
609 
611  NULL, 1, skey);
612 
613  while (HeapTupleIsValid(tup = systable_getnext(scan)))
614  {
615  Form_pg_opclass opclass = (Form_pg_opclass) GETSTRUCT(tup);
616 
617  if (opclass->opcintype == typeoid && opclass->opcdefault)
618  ereport(ERROR,
620  errmsg("could not make operator class \"%s\" be default for type %s",
621  opcname,
622  TypeNameToString(stmt->datatype)),
623  errdetail("Operator class \"%s\" already is the default.",
624  NameStr(opclass->opcname))));
625  }
626 
627  systable_endscan(scan);
628  }
629 
630  /*
631  * Okay, let's create the pg_opclass entry.
632  */
633  memset(values, 0, sizeof(values));
634  memset(nulls, false, sizeof(nulls));
635 
636  values[Anum_pg_opclass_opcmethod - 1] = ObjectIdGetDatum(amoid);
637  namestrcpy(&opcName, opcname);
638  values[Anum_pg_opclass_opcname - 1] = NameGetDatum(&opcName);
639  values[Anum_pg_opclass_opcnamespace - 1] = ObjectIdGetDatum(namespaceoid);
641  values[Anum_pg_opclass_opcfamily - 1] = ObjectIdGetDatum(opfamilyoid);
642  values[Anum_pg_opclass_opcintype - 1] = ObjectIdGetDatum(typeoid);
644  values[Anum_pg_opclass_opckeytype - 1] = ObjectIdGetDatum(storageoid);
645 
646  tup = heap_form_tuple(rel->rd_att, values, nulls);
647 
648  opclassoid = CatalogTupleInsert(rel, tup);
649 
650  heap_freetuple(tup);
651 
652  /*
653  * Now add tuples to pg_amop and pg_amproc tying in the operators and
654  * functions. Dependencies on them are inserted, too.
655  */
656  storeOperators(stmt->opfamilyname, amoid, opfamilyoid,
657  opclassoid, operators, false);
658  storeProcedures(stmt->opfamilyname, amoid, opfamilyoid,
659  opclassoid, procedures, false);
660 
661  /* let event triggers know what happened */
662  EventTriggerCollectCreateOpClass(stmt, opclassoid, operators, procedures);
663 
664  /*
665  * Create dependencies for the opclass proper. Note: we do not need a
666  * dependency link to the AM, because that exists through the opfamily.
667  */
669  myself.objectId = opclassoid;
670  myself.objectSubId = 0;
671 
672  /* dependency on namespace */
673  referenced.classId = NamespaceRelationId;
674  referenced.objectId = namespaceoid;
675  referenced.objectSubId = 0;
676  recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
677 
678  /* dependency on opfamily */
679  referenced.classId = OperatorFamilyRelationId;
680  referenced.objectId = opfamilyoid;
681  referenced.objectSubId = 0;
682  recordDependencyOn(&myself, &referenced, DEPENDENCY_AUTO);
683 
684  /* dependency on indexed datatype */
685  referenced.classId = TypeRelationId;
686  referenced.objectId = typeoid;
687  referenced.objectSubId = 0;
688  recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
689 
690  /* dependency on storage datatype */
691  if (OidIsValid(storageoid))
692  {
693  referenced.classId = TypeRelationId;
694  referenced.objectId = storageoid;
695  referenced.objectSubId = 0;
696  recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
697  }
698 
699  /* dependency on owner */
701 
702  /* dependency on extension */
703  recordDependencyOnCurrentExtension(&myself, false);
704 
705  /* Post creation hook for new operator class */
707 
709 
710  return myself;
711 }
712 
713 
714 /*
715  * DefineOpFamily
716  * Define a new index operator family.
717  */
720 {
721  char *opfname; /* name of opfamily we're creating */
722  Oid amoid, /* our AM's oid */
723  namespaceoid; /* namespace to create opfamily in */
724  AclResult aclresult;
725 
726  /* Convert list of names to a name and namespace */
727  namespaceoid = QualifiedNameGetCreationNamespace(stmt->opfamilyname,
728  &opfname);
729 
730  /* Check we have creation rights in target namespace */
731  aclresult = pg_namespace_aclcheck(namespaceoid, GetUserId(), ACL_CREATE);
732  if (aclresult != ACLCHECK_OK)
734  get_namespace_name(namespaceoid));
735 
736  /* Get access method OID, throwing an error if it doesn't exist. */
737  amoid = get_index_am_oid(stmt->amname, false);
738 
739  /* XXX Should we make any privilege check against the AM? */
740 
741  /*
742  * Currently, we require superuser privileges to create an opfamily. See
743  * comments in DefineOpClass.
744  */
745  if (!superuser())
746  ereport(ERROR,
747  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
748  errmsg("must be superuser to create an operator family")));
749 
750  /* Insert pg_opfamily catalog entry */
751  return CreateOpFamily(stmt->amname, opfname, namespaceoid, amoid);
752 }
753 
754 
755 /*
756  * AlterOpFamily
757  * Add or remove operators/procedures within an existing operator family.
758  *
759  * Note: this implements only ALTER OPERATOR FAMILY ... ADD/DROP. Some
760  * other commands called ALTER OPERATOR FAMILY exist, but go through
761  * different code paths.
762  */
763 Oid
765 {
766  Oid amoid, /* our AM's oid */
767  opfamilyoid; /* oid of opfamily */
768  int maxOpNumber, /* amstrategies value */
769  maxProcNumber; /* amsupport value */
770  HeapTuple tup;
771  IndexAmRoutine *amroutine;
772 
773  /* Get necessary info about access method */
775  if (!HeapTupleIsValid(tup))
776  ereport(ERROR,
777  (errcode(ERRCODE_UNDEFINED_OBJECT),
778  errmsg("access method \"%s\" does not exist",
779  stmt->amname)));
780 
781  amoid = HeapTupleGetOid(tup);
782  amroutine = GetIndexAmRoutineByAmId(amoid, false);
783  ReleaseSysCache(tup);
784 
785  maxOpNumber = amroutine->amstrategies;
786  /* if amstrategies is zero, just enforce that op numbers fit in int16 */
787  if (maxOpNumber <= 0)
788  maxOpNumber = SHRT_MAX;
789  maxProcNumber = amroutine->amsupport;
790 
791  /* XXX Should we make any privilege check against the AM? */
792 
793  /* Look up the opfamily */
794  opfamilyoid = get_opfamily_oid(amoid, stmt->opfamilyname, false);
795 
796  /*
797  * Currently, we require superuser privileges to alter an opfamily.
798  *
799  * XXX re-enable NOT_USED code sections below if you remove this test.
800  */
801  if (!superuser())
802  ereport(ERROR,
803  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
804  errmsg("must be superuser to alter an operator family")));
805 
806  /*
807  * ADD and DROP cases need separate code from here on down.
808  */
809  if (stmt->isDrop)
810  AlterOpFamilyDrop(stmt, amoid, opfamilyoid,
811  maxOpNumber, maxProcNumber, stmt->items);
812  else
813  AlterOpFamilyAdd(stmt, amoid, opfamilyoid,
814  maxOpNumber, maxProcNumber, stmt->items);
815 
816  return opfamilyoid;
817 }
818 
819 /*
820  * ADD part of ALTER OP FAMILY
821  */
822 static void
823 AlterOpFamilyAdd(AlterOpFamilyStmt *stmt, Oid amoid, Oid opfamilyoid,
824  int maxOpNumber, int maxProcNumber, List *items)
825 {
826  List *operators; /* OpFamilyMember list for operators */
827  List *procedures; /* OpFamilyMember list for support procs */
828  ListCell *l;
829 
830  operators = NIL;
831  procedures = NIL;
832 
833  /*
834  * Scan the "items" list to obtain additional info.
835  */
836  foreach(l, items)
837  {
839  Oid operOid;
840  Oid funcOid;
841  Oid sortfamilyOid;
842  OpFamilyMember *member;
843 
844  switch (item->itemtype)
845  {
847  if (item->number <= 0 || item->number > maxOpNumber)
848  ereport(ERROR,
849  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
850  errmsg("invalid operator number %d,"
851  " must be between 1 and %d",
852  item->number, maxOpNumber)));
853  if (item->name->objargs != NIL)
854  operOid = LookupOperWithArgs(item->name, false);
855  else
856  {
857  ereport(ERROR,
858  (errcode(ERRCODE_SYNTAX_ERROR),
859  errmsg("operator argument types must be specified in ALTER OPERATOR FAMILY")));
860  operOid = InvalidOid; /* keep compiler quiet */
861  }
862 
863  if (item->order_family)
864  sortfamilyOid = get_opfamily_oid(BTREE_AM_OID,
865  item->order_family,
866  false);
867  else
868  sortfamilyOid = InvalidOid;
869 
870 #ifdef NOT_USED
871  /* XXX this is unnecessary given the superuser check above */
872  /* Caller must own operator and its underlying function */
873  if (!pg_oper_ownercheck(operOid, GetUserId()))
875  get_opname(operOid));
876  funcOid = get_opcode(operOid);
877  if (!pg_proc_ownercheck(funcOid, GetUserId()))
879  get_func_name(funcOid));
880 #endif
881 
882  /* Save the info */
883  member = (OpFamilyMember *) palloc0(sizeof(OpFamilyMember));
884  member->object = operOid;
885  member->number = item->number;
886  member->sortfamily = sortfamilyOid;
887  assignOperTypes(member, amoid, InvalidOid);
888  addFamilyMember(&operators, member, false);
889  break;
891  if (item->number <= 0 || item->number > maxProcNumber)
892  ereport(ERROR,
893  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
894  errmsg("invalid procedure number %d,"
895  " must be between 1 and %d",
896  item->number, maxProcNumber)));
897  funcOid = LookupFuncWithArgs(OBJECT_FUNCTION, item->name, false);
898 #ifdef NOT_USED
899  /* XXX this is unnecessary given the superuser check above */
900  /* Caller must own function */
901  if (!pg_proc_ownercheck(funcOid, GetUserId()))
903  get_func_name(funcOid));
904 #endif
905 
906  /* Save the info */
907  member = (OpFamilyMember *) palloc0(sizeof(OpFamilyMember));
908  member->object = funcOid;
909  member->number = item->number;
910 
911  /* allow overriding of the function's actual arg types */
912  if (item->class_args)
914  &member->lefttype, &member->righttype);
915 
916  assignProcTypes(member, amoid, InvalidOid);
917  addFamilyMember(&procedures, member, true);
918  break;
920  ereport(ERROR,
921  (errcode(ERRCODE_SYNTAX_ERROR),
922  errmsg("STORAGE cannot be specified in ALTER OPERATOR FAMILY")));
923  break;
924  default:
925  elog(ERROR, "unrecognized item type: %d", item->itemtype);
926  break;
927  }
928  }
929 
930  /*
931  * Add tuples to pg_amop and pg_amproc tying in the operators and
932  * functions. Dependencies on them are inserted, too.
933  */
934  storeOperators(stmt->opfamilyname, amoid, opfamilyoid,
935  InvalidOid, operators, true);
936  storeProcedures(stmt->opfamilyname, amoid, opfamilyoid,
937  InvalidOid, procedures, true);
938 
939  /* make information available to event triggers */
940  EventTriggerCollectAlterOpFam(stmt, opfamilyoid,
941  operators, procedures);
942 }
943 
944 /*
945  * DROP part of ALTER OP FAMILY
946  */
947 static void
948 AlterOpFamilyDrop(AlterOpFamilyStmt *stmt, Oid amoid, Oid opfamilyoid,
949  int maxOpNumber, int maxProcNumber, List *items)
950 {
951  List *operators; /* OpFamilyMember list for operators */
952  List *procedures; /* OpFamilyMember list for support procs */
953  ListCell *l;
954 
955  operators = NIL;
956  procedures = NIL;
957 
958  /*
959  * Scan the "items" list to obtain additional info.
960  */
961  foreach(l, items)
962  {
964  Oid lefttype,
965  righttype;
966  OpFamilyMember *member;
967 
968  switch (item->itemtype)
969  {
971  if (item->number <= 0 || item->number > maxOpNumber)
972  ereport(ERROR,
973  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
974  errmsg("invalid operator number %d,"
975  " must be between 1 and %d",
976  item->number, maxOpNumber)));
977  processTypesSpec(item->class_args, &lefttype, &righttype);
978  /* Save the info */
979  member = (OpFamilyMember *) palloc0(sizeof(OpFamilyMember));
980  member->number = item->number;
981  member->lefttype = lefttype;
982  member->righttype = righttype;
983  addFamilyMember(&operators, member, false);
984  break;
986  if (item->number <= 0 || item->number > maxProcNumber)
987  ereport(ERROR,
988  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
989  errmsg("invalid procedure number %d,"
990  " must be between 1 and %d",
991  item->number, maxProcNumber)));
992  processTypesSpec(item->class_args, &lefttype, &righttype);
993  /* Save the info */
994  member = (OpFamilyMember *) palloc0(sizeof(OpFamilyMember));
995  member->number = item->number;
996  member->lefttype = lefttype;
997  member->righttype = righttype;
998  addFamilyMember(&procedures, member, true);
999  break;
1001  /* grammar prevents this from appearing */
1002  default:
1003  elog(ERROR, "unrecognized item type: %d", item->itemtype);
1004  break;
1005  }
1006  }
1007 
1008  /*
1009  * Remove tuples from pg_amop and pg_amproc.
1010  */
1011  dropOperators(stmt->opfamilyname, amoid, opfamilyoid, operators);
1012  dropProcedures(stmt->opfamilyname, amoid, opfamilyoid, procedures);
1013 
1014  /* make information available to event triggers */
1015  EventTriggerCollectAlterOpFam(stmt, opfamilyoid,
1016  operators, procedures);
1017 }
1018 
1019 
1020 /*
1021  * Deal with explicit arg types used in ALTER ADD/DROP
1022  */
1023 static void
1024 processTypesSpec(List *args, Oid *lefttype, Oid *righttype)
1025 {
1026  TypeName *typeName;
1027 
1028  Assert(args != NIL);
1029 
1030  typeName = (TypeName *) linitial(args);
1031  *lefttype = typenameTypeId(NULL, typeName);
1032 
1033  if (list_length(args) > 1)
1034  {
1035  typeName = (TypeName *) lsecond(args);
1036  *righttype = typenameTypeId(NULL, typeName);
1037  }
1038  else
1039  *righttype = *lefttype;
1040 
1041  if (list_length(args) > 2)
1042  ereport(ERROR,
1043  (errcode(ERRCODE_SYNTAX_ERROR),
1044  errmsg("one or two argument types must be specified")));
1045 }
1046 
1047 
1048 /*
1049  * Determine the lefttype/righttype to assign to an operator,
1050  * and do any validity checking we can manage.
1051  */
1052 static void
1053 assignOperTypes(OpFamilyMember *member, Oid amoid, Oid typeoid)
1054 {
1055  Operator optup;
1056  Form_pg_operator opform;
1057 
1058  /* Fetch the operator definition */
1059  optup = SearchSysCache1(OPEROID, ObjectIdGetDatum(member->object));
1060  if (optup == NULL)
1061  elog(ERROR, "cache lookup failed for operator %u", member->object);
1062  opform = (Form_pg_operator) GETSTRUCT(optup);
1063 
1064  /*
1065  * Opfamily operators must be binary.
1066  */
1067  if (opform->oprkind != 'b')
1068  ereport(ERROR,
1069  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1070  errmsg("index operators must be binary")));
1071 
1072  if (OidIsValid(member->sortfamily))
1073  {
1074  /*
1075  * Ordering op, check index supports that. (We could perhaps also
1076  * check that the operator returns a type supported by the sortfamily,
1077  * but that seems more trouble than it's worth here. If it does not,
1078  * the operator will never be matchable to any ORDER BY clause, but no
1079  * worse consequences can ensue. Also, trying to check that would
1080  * create an ordering hazard during dump/reload: it's possible that
1081  * the family has been created but not yet populated with the required
1082  * operators.)
1083  */
1084  IndexAmRoutine *amroutine = GetIndexAmRoutineByAmId(amoid, false);
1085 
1086  if (!amroutine->amcanorderbyop)
1087  ereport(ERROR,
1088  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1089  errmsg("access method \"%s\" does not support ordering operators",
1090  get_am_name(amoid))));
1091  }
1092  else
1093  {
1094  /*
1095  * Search operators must return boolean.
1096  */
1097  if (opform->oprresult != BOOLOID)
1098  ereport(ERROR,
1099  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1100  errmsg("index search operators must return boolean")));
1101  }
1102 
1103  /*
1104  * If lefttype/righttype isn't specified, use the operator's input types
1105  */
1106  if (!OidIsValid(member->lefttype))
1107  member->lefttype = opform->oprleft;
1108  if (!OidIsValid(member->righttype))
1109  member->righttype = opform->oprright;
1110 
1111  ReleaseSysCache(optup);
1112 }
1113 
1114 /*
1115  * Determine the lefttype/righttype to assign to a support procedure,
1116  * and do any validity checking we can manage.
1117  */
1118 static void
1119 assignProcTypes(OpFamilyMember *member, Oid amoid, Oid typeoid)
1120 {
1121  HeapTuple proctup;
1122  Form_pg_proc procform;
1123 
1124  /* Fetch the procedure definition */
1125  proctup = SearchSysCache1(PROCOID, ObjectIdGetDatum(member->object));
1126  if (proctup == NULL)
1127  elog(ERROR, "cache lookup failed for function %u", member->object);
1128  procform = (Form_pg_proc) GETSTRUCT(proctup);
1129 
1130  /*
1131  * btree comparison procs must be 2-arg procs returning int4, while btree
1132  * sortsupport procs must take internal and return void. hash support
1133  * proc 1 must be a 1-arg proc returning int4, while proc 2 must be a
1134  * 2-arg proc returning int8. Otherwise we don't know.
1135  */
1136  if (amoid == BTREE_AM_OID)
1137  {
1138  if (member->number == BTORDER_PROC)
1139  {
1140  if (procform->pronargs != 2)
1141  ereport(ERROR,
1142  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1143  errmsg("btree comparison procedures must have two arguments")));
1144  if (procform->prorettype != INT4OID)
1145  ereport(ERROR,
1146  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1147  errmsg("btree comparison procedures must return integer")));
1148 
1149  /*
1150  * If lefttype/righttype isn't specified, use the proc's input
1151  * types
1152  */
1153  if (!OidIsValid(member->lefttype))
1154  member->lefttype = procform->proargtypes.values[0];
1155  if (!OidIsValid(member->righttype))
1156  member->righttype = procform->proargtypes.values[1];
1157  }
1158  else if (member->number == BTSORTSUPPORT_PROC)
1159  {
1160  if (procform->pronargs != 1 ||
1161  procform->proargtypes.values[0] != INTERNALOID)
1162  ereport(ERROR,
1163  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1164  errmsg("btree sort support procedures must accept type \"internal\"")));
1165  if (procform->prorettype != VOIDOID)
1166  ereport(ERROR,
1167  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1168  errmsg("btree sort support procedures must return void")));
1169 
1170  /*
1171  * Can't infer lefttype/righttype from proc, so use default rule
1172  */
1173  }
1174  }
1175  else if (amoid == HASH_AM_OID)
1176  {
1177  if (member->number == HASHSTANDARD_PROC)
1178  {
1179  if (procform->pronargs != 1)
1180  ereport(ERROR,
1181  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1182  errmsg("hash procedure 1 must have one argument")));
1183  if (procform->prorettype != INT4OID)
1184  ereport(ERROR,
1185  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1186  errmsg("hash procedure 1 must return integer")));
1187  }
1188  else if (member->number == HASHEXTENDED_PROC)
1189  {
1190  if (procform->pronargs != 2)
1191  ereport(ERROR,
1192  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1193  errmsg("hash procedure 2 must have two arguments")));
1194  if (procform->prorettype != INT8OID)
1195  ereport(ERROR,
1196  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1197  errmsg("hash procedure 2 must return bigint")));
1198  }
1199 
1200  /*
1201  * If lefttype/righttype isn't specified, use the proc's input type
1202  */
1203  if (!OidIsValid(member->lefttype))
1204  member->lefttype = procform->proargtypes.values[0];
1205  if (!OidIsValid(member->righttype))
1206  member->righttype = procform->proargtypes.values[0];
1207  }
1208 
1209  /*
1210  * The default in CREATE OPERATOR CLASS is to use the class' opcintype as
1211  * lefttype and righttype. In CREATE or ALTER OPERATOR FAMILY, opcintype
1212  * isn't available, so make the user specify the types.
1213  */
1214  if (!OidIsValid(member->lefttype))
1215  member->lefttype = typeoid;
1216  if (!OidIsValid(member->righttype))
1217  member->righttype = typeoid;
1218 
1219  if (!OidIsValid(member->lefttype) || !OidIsValid(member->righttype))
1220  ereport(ERROR,
1221  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1222  errmsg("associated data types must be specified for index support procedure")));
1223 
1224  ReleaseSysCache(proctup);
1225 }
1226 
1227 /*
1228  * Add a new family member to the appropriate list, after checking for
1229  * duplicated strategy or proc number.
1230  */
1231 static void
1232 addFamilyMember(List **list, OpFamilyMember *member, bool isProc)
1233 {
1234  ListCell *l;
1235 
1236  foreach(l, *list)
1237  {
1238  OpFamilyMember *old = (OpFamilyMember *) lfirst(l);
1239 
1240  if (old->number == member->number &&
1241  old->lefttype == member->lefttype &&
1242  old->righttype == member->righttype)
1243  {
1244  if (isProc)
1245  ereport(ERROR,
1246  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1247  errmsg("procedure number %d for (%s,%s) appears more than once",
1248  member->number,
1249  format_type_be(member->lefttype),
1250  format_type_be(member->righttype))));
1251  else
1252  ereport(ERROR,
1253  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1254  errmsg("operator number %d for (%s,%s) appears more than once",
1255  member->number,
1256  format_type_be(member->lefttype),
1257  format_type_be(member->righttype))));
1258  }
1259  }
1260  *list = lappend(*list, member);
1261 }
1262 
1263 /*
1264  * Dump the operators to pg_amop
1265  *
1266  * We also make dependency entries in pg_depend for the opfamily entries.
1267  * If opclassoid is valid then make an INTERNAL dependency on that opclass,
1268  * else make an AUTO dependency on the opfamily.
1269  */
1270 static void
1271 storeOperators(List *opfamilyname, Oid amoid,
1272  Oid opfamilyoid, Oid opclassoid,
1273  List *operators, bool isAdd)
1274 {
1275  Relation rel;
1277  bool nulls[Natts_pg_amop];
1278  HeapTuple tup;
1279  Oid entryoid;
1280  ObjectAddress myself,
1281  referenced;
1282  ListCell *l;
1283 
1285 
1286  foreach(l, operators)
1287  {
1288  OpFamilyMember *op = (OpFamilyMember *) lfirst(l);
1289  char oppurpose;
1290 
1291  /*
1292  * If adding to an existing family, check for conflict with an
1293  * existing pg_amop entry (just to give a nicer error message)
1294  */
1295  if (isAdd &&
1297  ObjectIdGetDatum(opfamilyoid),
1300  Int16GetDatum(op->number)))
1301  ereport(ERROR,
1303  errmsg("operator %d(%s,%s) already exists in operator family \"%s\"",
1304  op->number,
1305  format_type_be(op->lefttype),
1307  NameListToString(opfamilyname))));
1308 
1309  oppurpose = OidIsValid(op->sortfamily) ? AMOP_ORDER : AMOP_SEARCH;
1310 
1311  /* Create the pg_amop entry */
1312  memset(values, 0, sizeof(values));
1313  memset(nulls, false, sizeof(nulls));
1314 
1315  values[Anum_pg_amop_amopfamily - 1] = ObjectIdGetDatum(opfamilyoid);
1318  values[Anum_pg_amop_amopstrategy - 1] = Int16GetDatum(op->number);
1319  values[Anum_pg_amop_amoppurpose - 1] = CharGetDatum(oppurpose);
1320  values[Anum_pg_amop_amopopr - 1] = ObjectIdGetDatum(op->object);
1321  values[Anum_pg_amop_amopmethod - 1] = ObjectIdGetDatum(amoid);
1323 
1324  tup = heap_form_tuple(rel->rd_att, values, nulls);
1325 
1326  entryoid = CatalogTupleInsert(rel, tup);
1327 
1328  heap_freetuple(tup);
1329 
1330  /* Make its dependencies */
1332  myself.objectId = entryoid;
1333  myself.objectSubId = 0;
1334 
1335  referenced.classId = OperatorRelationId;
1336  referenced.objectId = op->object;
1337  referenced.objectSubId = 0;
1338 
1339  if (OidIsValid(opclassoid))
1340  {
1341  /* if contained in an opclass, use a NORMAL dep on operator */
1342  recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
1343 
1344  /* ... and an INTERNAL dep on the opclass */
1345  referenced.classId = OperatorClassRelationId;
1346  referenced.objectId = opclassoid;
1347  referenced.objectSubId = 0;
1348  recordDependencyOn(&myself, &referenced, DEPENDENCY_INTERNAL);
1349  }
1350  else
1351  {
1352  /* if "loose" in the opfamily, use a AUTO dep on operator */
1353  recordDependencyOn(&myself, &referenced, DEPENDENCY_AUTO);
1354 
1355  /* ... and an AUTO dep on the opfamily */
1356  referenced.classId = OperatorFamilyRelationId;
1357  referenced.objectId = opfamilyoid;
1358  referenced.objectSubId = 0;
1359  recordDependencyOn(&myself, &referenced, DEPENDENCY_AUTO);
1360  }
1361 
1362  /* A search operator also needs a dep on the referenced opfamily */
1363  if (OidIsValid(op->sortfamily))
1364  {
1365  referenced.classId = OperatorFamilyRelationId;
1366  referenced.objectId = op->sortfamily;
1367  referenced.objectSubId = 0;
1368  recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
1369  }
1370  /* Post create hook of this access method operator */
1372  entryoid, 0);
1373  }
1374 
1376 }
1377 
1378 /*
1379  * Dump the procedures (support routines) to pg_amproc
1380  *
1381  * We also make dependency entries in pg_depend for the opfamily entries.
1382  * If opclassoid is valid then make an INTERNAL dependency on that opclass,
1383  * else make an AUTO dependency on the opfamily.
1384  */
1385 static void
1386 storeProcedures(List *opfamilyname, Oid amoid,
1387  Oid opfamilyoid, Oid opclassoid,
1388  List *procedures, bool isAdd)
1389 {
1390  Relation rel;
1392  bool nulls[Natts_pg_amproc];
1393  HeapTuple tup;
1394  Oid entryoid;
1395  ObjectAddress myself,
1396  referenced;
1397  ListCell *l;
1398 
1400 
1401  foreach(l, procedures)
1402  {
1403  OpFamilyMember *proc = (OpFamilyMember *) lfirst(l);
1404 
1405  /*
1406  * If adding to an existing family, check for conflict with an
1407  * existing pg_amproc entry (just to give a nicer error message)
1408  */
1409  if (isAdd &&
1411  ObjectIdGetDatum(opfamilyoid),
1412  ObjectIdGetDatum(proc->lefttype),
1413  ObjectIdGetDatum(proc->righttype),
1414  Int16GetDatum(proc->number)))
1415  ereport(ERROR,
1417  errmsg("function %d(%s,%s) already exists in operator family \"%s\"",
1418  proc->number,
1419  format_type_be(proc->lefttype),
1420  format_type_be(proc->righttype),
1421  NameListToString(opfamilyname))));
1422 
1423  /* Create the pg_amproc entry */
1424  memset(values, 0, sizeof(values));
1425  memset(nulls, false, sizeof(nulls));
1426 
1427  values[Anum_pg_amproc_amprocfamily - 1] = ObjectIdGetDatum(opfamilyoid);
1430  values[Anum_pg_amproc_amprocnum - 1] = Int16GetDatum(proc->number);
1431  values[Anum_pg_amproc_amproc - 1] = ObjectIdGetDatum(proc->object);
1432 
1433  tup = heap_form_tuple(rel->rd_att, values, nulls);
1434 
1435  entryoid = CatalogTupleInsert(rel, tup);
1436 
1437  heap_freetuple(tup);
1438 
1439  /* Make its dependencies */
1441  myself.objectId = entryoid;
1442  myself.objectSubId = 0;
1443 
1444  referenced.classId = ProcedureRelationId;
1445  referenced.objectId = proc->object;
1446  referenced.objectSubId = 0;
1447 
1448  if (OidIsValid(opclassoid))
1449  {
1450  /* if contained in an opclass, use a NORMAL dep on procedure */
1451  recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
1452 
1453  /* ... and an INTERNAL dep on the opclass */
1454  referenced.classId = OperatorClassRelationId;
1455  referenced.objectId = opclassoid;
1456  referenced.objectSubId = 0;
1457  recordDependencyOn(&myself, &referenced, DEPENDENCY_INTERNAL);
1458  }
1459  else
1460  {
1461  /* if "loose" in the opfamily, use a AUTO dep on procedure */
1462  recordDependencyOn(&myself, &referenced, DEPENDENCY_AUTO);
1463 
1464  /* ... and an AUTO dep on the opfamily */
1465  referenced.classId = OperatorFamilyRelationId;
1466  referenced.objectId = opfamilyoid;
1467  referenced.objectSubId = 0;
1468  recordDependencyOn(&myself, &referenced, DEPENDENCY_AUTO);
1469  }
1470  /* Post create hook of access method procedure */
1472  entryoid, 0);
1473  }
1474 
1476 }
1477 
1478 
1479 /*
1480  * Remove operator entries from an opfamily.
1481  *
1482  * Note: this is only allowed for "loose" members of an opfamily, hence
1483  * behavior is always RESTRICT.
1484  */
1485 static void
1486 dropOperators(List *opfamilyname, Oid amoid, Oid opfamilyoid,
1487  List *operators)
1488 {
1489  ListCell *l;
1490 
1491  foreach(l, operators)
1492  {
1493  OpFamilyMember *op = (OpFamilyMember *) lfirst(l);
1494  Oid amopid;
1495  ObjectAddress object;
1496 
1497  amopid = GetSysCacheOid4(AMOPSTRATEGY,
1498  ObjectIdGetDatum(opfamilyoid),
1501  Int16GetDatum(op->number));
1502  if (!OidIsValid(amopid))
1503  ereport(ERROR,
1504  (errcode(ERRCODE_UNDEFINED_OBJECT),
1505  errmsg("operator %d(%s,%s) does not exist in operator family \"%s\"",
1506  op->number,
1507  format_type_be(op->lefttype),
1509  NameListToString(opfamilyname))));
1510 
1511  object.classId = AccessMethodOperatorRelationId;
1512  object.objectId = amopid;
1513  object.objectSubId = 0;
1514 
1515  performDeletion(&object, DROP_RESTRICT, 0);
1516  }
1517 }
1518 
1519 /*
1520  * Remove procedure entries from an opfamily.
1521  *
1522  * Note: this is only allowed for "loose" members of an opfamily, hence
1523  * behavior is always RESTRICT.
1524  */
1525 static void
1526 dropProcedures(List *opfamilyname, Oid amoid, Oid opfamilyoid,
1527  List *procedures)
1528 {
1529  ListCell *l;
1530 
1531  foreach(l, procedures)
1532  {
1533  OpFamilyMember *op = (OpFamilyMember *) lfirst(l);
1534  Oid amprocid;
1535  ObjectAddress object;
1536 
1537  amprocid = GetSysCacheOid4(AMPROCNUM,
1538  ObjectIdGetDatum(opfamilyoid),
1541  Int16GetDatum(op->number));
1542  if (!OidIsValid(amprocid))
1543  ereport(ERROR,
1544  (errcode(ERRCODE_UNDEFINED_OBJECT),
1545  errmsg("function %d(%s,%s) does not exist in operator family \"%s\"",
1546  op->number,
1547  format_type_be(op->lefttype),
1549  NameListToString(opfamilyname))));
1550 
1551  object.classId = AccessMethodProcedureRelationId;
1552  object.objectId = amprocid;
1553  object.objectSubId = 0;
1554 
1555  performDeletion(&object, DROP_RESTRICT, 0);
1556  }
1557 }
1558 
1559 /*
1560  * Deletion subroutines for use by dependency.c.
1561  */
1562 void
1564 {
1565  Relation rel;
1566  HeapTuple tup;
1567 
1569 
1570  tup = SearchSysCache1(OPFAMILYOID, ObjectIdGetDatum(opfamilyOid));
1571  if (!HeapTupleIsValid(tup)) /* should not happen */
1572  elog(ERROR, "cache lookup failed for opfamily %u", opfamilyOid);
1573 
1574  CatalogTupleDelete(rel, &tup->t_self);
1575 
1576  ReleaseSysCache(tup);
1577 
1579 }
1580 
1581 void
1583 {
1584  Relation rel;
1585  HeapTuple tup;
1586 
1588 
1589  tup = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclassOid));
1590  if (!HeapTupleIsValid(tup)) /* should not happen */
1591  elog(ERROR, "cache lookup failed for opclass %u", opclassOid);
1592 
1593  CatalogTupleDelete(rel, &tup->t_self);
1594 
1595  ReleaseSysCache(tup);
1596 
1598 }
1599 
1600 void
1602 {
1603  Relation rel;
1604  HeapTuple tup;
1605  ScanKeyData skey[1];
1606  SysScanDesc scan;
1607 
1608  ScanKeyInit(&skey[0],
1610  BTEqualStrategyNumber, F_OIDEQ,
1611  ObjectIdGetDatum(entryOid));
1612 
1614 
1616  NULL, 1, skey);
1617 
1618  /* we expect exactly one match */
1619  tup = systable_getnext(scan);
1620  if (!HeapTupleIsValid(tup))
1621  elog(ERROR, "could not find tuple for amop entry %u", entryOid);
1622 
1623  CatalogTupleDelete(rel, &tup->t_self);
1624 
1625  systable_endscan(scan);
1627 }
1628 
1629 void
1631 {
1632  Relation rel;
1633  HeapTuple tup;
1634  ScanKeyData skey[1];
1635  SysScanDesc scan;
1636 
1637  ScanKeyInit(&skey[0],
1639  BTEqualStrategyNumber, F_OIDEQ,
1640  ObjectIdGetDatum(entryOid));
1641 
1643 
1645  NULL, 1, skey);
1646 
1647  /* we expect exactly one match */
1648  tup = systable_getnext(scan);
1649  if (!HeapTupleIsValid(tup))
1650  elog(ERROR, "could not find tuple for amproc entry %u", entryOid);
1651 
1652  CatalogTupleDelete(rel, &tup->t_self);
1653 
1654  systable_endscan(scan);
1656 }
1657 
1658 /*
1659  * Subroutine for ALTER OPERATOR CLASS SET SCHEMA/RENAME
1660  *
1661  * Is there an operator class with the given name and signature already
1662  * in the given namespace? If so, raise an appropriate error message.
1663  */
1664 void
1665 IsThereOpClassInNamespace(const char *opcname, Oid opcmethod,
1666  Oid opcnamespace)
1667 {
1668  /* make sure the new name doesn't exist */
1670  ObjectIdGetDatum(opcmethod),
1671  CStringGetDatum(opcname),
1672  ObjectIdGetDatum(opcnamespace)))
1673  ereport(ERROR,
1675  errmsg("operator class \"%s\" for access method \"%s\" already exists in schema \"%s\"",
1676  opcname,
1677  get_am_name(opcmethod),
1678  get_namespace_name(opcnamespace))));
1679 }
1680 
1681 /*
1682  * Subroutine for ALTER OPERATOR FAMILY SET SCHEMA/RENAME
1683  *
1684  * Is there an operator family with the given name and signature already
1685  * in the given namespace? If so, raise an appropriate error message.
1686  */
1687 void
1688 IsThereOpFamilyInNamespace(const char *opfname, Oid opfmethod,
1689  Oid opfnamespace)
1690 {
1691  /* make sure the new name doesn't exist */
1693  ObjectIdGetDatum(opfmethod),
1694  CStringGetDatum(opfname),
1695  ObjectIdGetDatum(opfnamespace)))
1696  ereport(ERROR,
1698  errmsg("operator family \"%s\" for access method \"%s\" already exists in schema \"%s\"",
1699  opfname,
1700  get_am_name(opfmethod),
1701  get_namespace_name(opfnamespace))));
1702 }
Oid LookupOperWithArgs(ObjectWithArgs *oper, bool noError)
Definition: parse_oper.c:140
#define NIL
Definition: pg_list.h:69
#define Anum_pg_amop_amopsortfamily
Definition: pg_amop.h:91
#define GetSysCacheOid4(cacheId, key1, key2, key3, key4)
Definition: syscache.h:197
#define NamespaceRelationId
Definition: pg_namespace.h:34
#define NameGetDatum(X)
Definition: postgres.h:601
uint16 amsupport
Definition: amapi.h:169
#define Anum_pg_opclass_opcmethod
Definition: pg_opclass.h:75
#define BTORDER_PROC
Definition: nbtree.h:229
#define OperatorRelationId
Definition: pg_operator.h:32
Oid LookupExplicitNamespace(const char *nspname, bool missing_ok)
Definition: namespace.c:2853
void systable_endscan(SysScanDesc sysscan)
Definition: genam.c:499
#define GETSTRUCT(TUP)
Definition: htup_details.h:661
static void assignOperTypes(OpFamilyMember *member, Oid amoid, Oid typeoid)
Definition: opclasscmds.c:1053
#define Anum_pg_opfamily_opfmethod
Definition: pg_opfamily.h:51
#define Anum_pg_opclass_opckeytype
Definition: pg_opclass.h:82
#define InvokeObjectPostCreateHook(classId, objectId, subId)
Definition: objectaccess.h:145
Definition: syscache.h:36
#define Anum_pg_amop_amopmethod
Definition: pg_amop.h:90
#define AMOP_SEARCH
Definition: pg_amop.h:69
#define BTSORTSUPPORT_PROC
Definition: nbtree.h:230
void RemoveOpClassById(Oid opclassOid)
Definition: opclasscmds.c:1582
Oid GetUserId(void)
Definition: miscinit.c:284
TypeName * storedtype
Definition: parsenodes.h:2554
#define ObjectIdAttributeNumber
Definition: sysattr.h:22
bool amcanorderbyop
Definition: amapi.h:173
Oid QualifiedNameGetCreationNamespace(List *names, char **objname_p)
Definition: namespace.c:2956
#define PointerGetDatum(X)
Definition: postgres.h:562
char * TypeNameToString(const TypeName *typeName)
Definition: parse_type.c:459
#define ProcedureRelationId
Definition: pg_proc.h:33
static HeapTuple OpClassCacheLookup(Oid amID, List *opclassname, bool missing_ok)
Definition: opclasscmds.c:163
#define Anum_pg_opfamily_opfowner
Definition: pg_opfamily.h:54
#define BTREE_AM_OID
Definition: pg_am.h:70
bool amstorage
Definition: amapi.h:187
#define Int16GetDatum(X)
Definition: postgres.h:457
#define Anum_pg_opfamily_opfnamespace
Definition: pg_opfamily.h:53
#define Anum_pg_opclass_opcintype
Definition: pg_opclass.h:80
#define OperatorClassRelationId
Definition: pg_opclass.h:49
#define INT4OID
Definition: pg_type.h:316
#define Anum_pg_opclass_opcowner
Definition: pg_opclass.h:78
#define OperatorFamilyRelationId
Definition: pg_opfamily.h:29
#define SearchSysCacheExists4(cacheId, key1, key2, key3, key4)
Definition: syscache.h:188
#define AccessMethodOperatorOidIndexId
Definition: indexing.h:79
bool pg_oper_ownercheck(Oid oper_oid, Oid roleid)
Definition: aclchk.c:4656
int errcode(int sqlerrcode)
Definition: elog.c:575
static HeapTuple OpFamilyCacheLookup(Oid amID, List *opfamilyname, bool missing_ok)
Definition: opclasscmds.c:84
static void dropProcedures(List *opfamilyname, Oid amoid, Oid opfamilyoid, List *procedures)
Definition: opclasscmds.c:1526
#define HASHEXTENDED_PROC
Definition: hash.h:352
bool superuser(void)
Definition: superuser.c:47
char * format_type_be(Oid type_oid)
Definition: format_type.c:94
#define Natts_pg_amop
Definition: pg_amop.h:83
void CatalogTupleDelete(Relation heapRel, ItemPointer tid)
Definition: indexing.c:255
void recordDependencyOn(const ObjectAddress *depender, const ObjectAddress *referenced, DependencyType behavior)
Definition: pg_depend.c:44
void DeconstructQualifiedName(List *names, char **nspname_p, char **objname_p)
Definition: namespace.c:2769
Oid LookupOperName(ParseState *pstate, List *opername, Oid oprleft, Oid oprright, bool noError, int location)
Definition: parse_oper.c:102
HeapTuple heap_form_tuple(TupleDesc tupleDescriptor, Datum *values, bool *isnull)
Definition: heaptuple.c:695
#define Anum_pg_amop_amoprighttype
Definition: pg_amop.h:86
#define heap_close(r, l)
Definition: heapam.h:97
Oid get_opclass_oid(Oid amID, List *opclassname, bool missing_ok)
Definition: opclasscmds.c:221
void recordDependencyOnOwner(Oid classId, Oid objectId, Oid owner)
Definition: pg_shdepend.c:159
void RemoveAmProcEntryById(Oid entryOid)
Definition: opclasscmds.c:1630
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1373
unsigned int Oid
Definition: postgres_ext.h:31
#define Anum_pg_opfamily_opfname
Definition: pg_opfamily.h:52
bool pg_type_ownercheck(Oid type_oid, Oid roleid)
Definition: aclchk.c:4630
#define TypeRelationId
Definition: pg_type.h:34
ObjectAddress DefineOpClass(CreateOpClassStmt *stmt)
Definition: opclasscmds.c:324
int namestrcpy(Name name, const char *str)
Definition: name.c:216
Oid OpclassnameGetOpcid(Oid amid, const char *opcname)
Definition: namespace.c:1760
#define OidIsValid(objectId)
Definition: c.h:576
#define HASH_AM_OID
Definition: pg_am.h:73
AclResult pg_namespace_aclcheck(Oid nsp_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:4542
void IsThereOpClassInNamespace(const char *opcname, Oid opcmethod, Oid opcnamespace)
Definition: opclasscmds.c:1665
#define Anum_pg_opclass_opcfamily
Definition: pg_opclass.h:79
SysScanDesc systable_beginscan(Relation heapRelation, Oid indexId, bool indexOK, Snapshot snapshot, int nkeys, ScanKey key)
Definition: genam.c:328
#define OpclassAmNameNspIndexId
Definition: indexing.h:198
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Definition: pg_list.h:116
void aclcheck_error_type(AclResult aclerr, Oid typeOid)
Definition: aclchk.c:3515
#define AccessMethodOperatorRelationId
Definition: pg_amop.h:54
#define AccessMethodProcedureOidIndexId
Definition: indexing.h:84
#define Natts_pg_opfamily
Definition: pg_opfamily.h:50
#define OPCLASS_ITEM_OPERATOR
Definition: parsenodes.h:2540
#define Anum_pg_amproc_amproclefttype
Definition: pg_amproc.h:67
char * get_opname(Oid opno)
Definition: lsyscache.c:1119
static void dropOperators(List *opfamilyname, Oid amoid, Oid opfamilyoid, List *operators)
Definition: opclasscmds.c:1486
Oid OpfamilynameGetOpfid(Oid amid, const char *opfname)
Definition: namespace.c:1843
HeapTuple systable_getnext(SysScanDesc sysscan)
Definition: genam.c:416
#define Anum_pg_opclass_opcnamespace
Definition: pg_opclass.h:77
static void AlterOpFamilyDrop(AlterOpFamilyStmt *stmt, Oid amoid, Oid opfamilyoid, int maxOpNumber, int maxProcNumber, List *items)
Definition: opclasscmds.c:948
#define linitial(l)
Definition: pg_list.h:111
#define VOIDOID
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#define ObjectIdGetDatum(X)
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#define ERROR
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#define ACL_CREATE
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#define SearchSysCacheExists3(cacheId, key1, key2, key3)
Definition: syscache.h:186
Oid CatalogTupleInsert(Relation heapRel, HeapTuple tup)
Definition: indexing.c:162
IndexAmRoutine * GetIndexAmRoutineByAmId(Oid amoid, bool noerror)
Definition: amapi.c:56
#define Anum_pg_opclass_opcname
Definition: pg_opclass.h:76
char * get_func_name(Oid funcid)
Definition: lsyscache.c:1412
HeapTuple SearchSysCache3(int cacheId, Datum key1, Datum key2, Datum key3)
Definition: syscache.c:1134
#define Anum_pg_amproc_amprocfamily
Definition: pg_amproc.h:66
ItemPointerData t_self
Definition: htup.h:65
#define lfirst_node(type, lc)
Definition: pg_list.h:109
Definition: c.h:541
TypeName * datatype
Definition: parsenodes.h:2535
void RemoveOpFamilyById(Oid opfamilyOid)
Definition: opclasscmds.c:1563
ObjectWithArgs * name
Definition: parsenodes.h:2548
char * get_namespace_name(Oid nspid)
Definition: lsyscache.c:3066
Oid get_index_am_oid(const char *amname, bool missing_ok)
Definition: amcmds.c:183
#define AccessMethodRelationId
Definition: pg_am.h:32
char * get_am_name(Oid amOid)
Definition: amcmds.c:202
void aclcheck_error(AclResult aclerr, AclObjectKind objectkind, const char *objectname)
Definition: aclchk.c:3457
Oid LookupFuncWithArgs(ObjectType objtype, ObjectWithArgs *func, bool noError)
Definition: parse_func.c:2019
#define RowExclusiveLock
Definition: lockdefs.h:38
int errdetail(const char *fmt,...)
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static void addFamilyMember(List **list, OpFamilyMember *member, bool isProc)
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#define CStringGetDatum(X)
Definition: postgres.h:584
#define Anum_pg_opclass_opcdefault
Definition: pg_opclass.h:81
void performDeletion(const ObjectAddress *object, DropBehavior behavior, int flags)
Definition: dependency.c:303
#define Anum_pg_amproc_amprocnum
Definition: pg_amproc.h:69
#define HASHSTANDARD_PROC
Definition: hash.h:351
#define ereport(elevel, rest)
Definition: elog.h:122
#define Anum_pg_amproc_amprocrighttype
Definition: pg_amproc.h:68
#define Anum_pg_amop_amoplefttype
Definition: pg_amop.h:85
static ObjectAddress CreateOpFamily(const char *amname, const char *opfname, Oid namespaceoid, Oid amoid)
Definition: opclasscmds.c:242
void EventTriggerCollectAlterOpFam(AlterOpFamilyStmt *stmt, Oid opfamoid, List *operators, List *procedures)
List * lappend(List *list, void *datum)
Definition: list.c:128
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1112
char * NameListToString(List *names)
Definition: namespace.c:3063
void RemoveAmOpEntryById(Oid entryOid)
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static void processTypesSpec(List *args, Oid *lefttype, Oid *righttype)
Definition: opclasscmds.c:1024
void * palloc0(Size size)
Definition: mcxt.c:877
AclResult
Definition: acl.h:178
uintptr_t Datum
Definition: postgres.h:372
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1160
#define Anum_pg_amop_amoppurpose
Definition: pg_amop.h:88
Relation heap_open(Oid relationId, LOCKMODE lockmode)
Definition: heapam.c:1290
TupleDesc rd_att
Definition: rel.h:115
FormData_pg_proc * Form_pg_proc
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#define BoolGetDatum(X)
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#define InvalidOid
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RegProcedure get_opcode(Oid opno)
Definition: lsyscache.c:1094
#define INTERNALOID
Definition: pg_type.h:698
#define INT8OID
Definition: pg_type.h:304
#define OPCLASS_ITEM_FUNCTION
Definition: parsenodes.h:2541
#define Natts_pg_opclass
Definition: pg_opclass.h:74
#define HeapTupleIsValid(tuple)
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#define Assert(condition)
Definition: c.h:670
#define lfirst(lc)
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void recordDependencyOnCurrentExtension(const ObjectAddress *object, bool isReplace)
Definition: pg_depend.c:139
static void AlterOpFamilyAdd(AlterOpFamilyStmt *stmt, Oid amoid, Oid opfamilyoid, int maxOpNumber, int maxProcNumber, List *items)
Definition: opclasscmds.c:823
#define OPCLASS_ITEM_STORAGETYPE
Definition: parsenodes.h:2542
void EventTriggerCollectCreateOpClass(CreateOpClassStmt *stmt, Oid opcoid, List *operators, List *procedures)
Oid get_opfamily_oid(Oid amID, List *opfamilyname, bool missing_ok)
Definition: opclasscmds.c:142
static int list_length(const List *l)
Definition: pg_list.h:89
static void storeProcedures(List *opfamilyname, Oid amoid, Oid opfamilyoid, Oid opclassoid, List *procedures, bool isAdd)
Definition: opclasscmds.c:1386
#define Anum_pg_amproc_amproc
Definition: pg_amproc.h:70
#define BOOLOID
Definition: pg_type.h:288
FormData_pg_operator * Form_pg_operator
Definition: pg_operator.h:57
#define CharGetDatum(X)
Definition: postgres.h:422
Oid AlterOpFamily(AlterOpFamilyStmt *stmt)
Definition: opclasscmds.c:764
ObjectAddress DefineOpFamily(CreateOpFamilyStmt *stmt)
Definition: opclasscmds.c:719
uint16 amstrategies
Definition: amapi.h:167
static Datum values[MAXATTR]
Definition: bootstrap.c:164
#define Natts_pg_amproc
Definition: pg_amproc.h:65
FormData_pg_am * Form_pg_am
Definition: pg_am.h:46
#define Anum_pg_amop_amopopr
Definition: pg_amop.h:89
int errmsg(const char *fmt,...)
Definition: elog.c:797
#define Anum_pg_amop_amopfamily
Definition: pg_amop.h:84
#define NameStr(name)
Definition: c.h:547
void ScanKeyInit(ScanKey entry, AttrNumber attributeNumber, StrategyNumber strategy, RegProcedure procedure, Datum argument)
Definition: scankey.c:76
#define AMOP_ORDER
Definition: pg_amop.h:70
#define elog
Definition: elog.h:219
#define HeapTupleGetOid(tuple)
Definition: htup_details.h:700
static void assignProcTypes(OpFamilyMember *member, Oid amoid, Oid typeoid)
Definition: opclasscmds.c:1119
static void storeOperators(List *opfamilyname, Oid amoid, Oid opfamilyoid, Oid opclassoid, List *operators, bool isAdd)
Definition: opclasscmds.c:1271
FormData_pg_opclass * Form_pg_opclass
Definition: pg_opclass.h:68
#define ERRCODE_DUPLICATE_OBJECT
Definition: streamutil.c:30
#define AccessMethodProcedureRelationId
Definition: pg_amproc.h:43
Definition: pg_list.h:45
#define BTEqualStrategyNumber
Definition: stratnum.h:31
bool pg_proc_ownercheck(Oid proc_oid, Oid roleid)
Definition: aclchk.c:4682
void IsThereOpFamilyInNamespace(const char *opfname, Oid opfmethod, Oid opfnamespace)
Definition: opclasscmds.c:1688
Oid typenameTypeId(ParseState *pstate, const TypeName *typeName)
Definition: parse_type.c:274
#define Anum_pg_amop_amopstrategy
Definition: pg_amop.h:87