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catalog.c
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1 /*-------------------------------------------------------------------------
2  *
3  * catalog.c
4  * routines concerned with catalog naming conventions and other
5  * bits of hard-wired knowledge
6  *
7  *
8  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
9  * Portions Copyright (c) 1994, Regents of the University of California
10  *
11  *
12  * IDENTIFICATION
13  * src/backend/catalog/catalog.c
14  *
15  *-------------------------------------------------------------------------
16  */
17 
18 #include "postgres.h"
19 
20 #include <fcntl.h>
21 #include <unistd.h>
22 
23 #include "access/genam.h"
24 #include "access/htup_details.h"
25 #include "access/table.h"
26 #include "access/transam.h"
27 #include "catalog/catalog.h"
28 #include "catalog/namespace.h"
30 #include "catalog/pg_authid.h"
31 #include "catalog/pg_database.h"
33 #include "catalog/pg_largeobject.h"
34 #include "catalog/pg_namespace.h"
37 #include "catalog/pg_shdepend.h"
39 #include "catalog/pg_shseclabel.h"
41 #include "catalog/pg_tablespace.h"
42 #include "catalog/pg_type.h"
43 #include "miscadmin.h"
44 #include "utils/fmgroids.h"
45 #include "utils/fmgrprotos.h"
46 #include "utils/rel.h"
47 #include "utils/snapmgr.h"
48 #include "utils/syscache.h"
49 
50 /*
51  * Parameters to determine when to emit a log message in
52  * GetNewOidWithIndex()
53  */
54 #define GETNEWOID_LOG_THRESHOLD 1000000
55 #define GETNEWOID_LOG_MAX_INTERVAL 128000000
56 
57 /*
58  * IsSystemRelation
59  * True iff the relation is either a system catalog or a toast table.
60  * See IsCatalogRelation for the exact definition of a system catalog.
61  *
62  * We treat toast tables of user relations as "system relations" for
63  * protection purposes, e.g. you can't change their schemas without
64  * special permissions. Therefore, most uses of this function are
65  * checking whether allow_system_table_mods restrictions apply.
66  * For other purposes, consider whether you shouldn't be using
67  * IsCatalogRelation instead.
68  *
69  * This function does not perform any catalog accesses.
70  * Some callers rely on that!
71  */
72 bool
74 {
75  return IsSystemClass(RelationGetRelid(relation), relation->rd_rel);
76 }
77 
78 /*
79  * IsSystemClass
80  * Like the above, but takes a Form_pg_class as argument.
81  * Used when we do not want to open the relation and have to
82  * search pg_class directly.
83  */
84 bool
86 {
87  /* IsCatalogRelationOid is a bit faster, so test that first */
88  return (IsCatalogRelationOid(relid) || IsToastClass(reltuple));
89 }
90 
91 /*
92  * IsCatalogRelation
93  * True iff the relation is a system catalog.
94  *
95  * By a system catalog, we mean one that is created during the bootstrap
96  * phase of initdb. That includes not just the catalogs per se, but
97  * also their indexes, and TOAST tables and indexes if any.
98  *
99  * This function does not perform any catalog accesses.
100  * Some callers rely on that!
101  */
102 bool
104 {
105  return IsCatalogRelationOid(RelationGetRelid(relation));
106 }
107 
108 /*
109  * IsCatalogRelationOid
110  * True iff the relation identified by this OID is a system catalog.
111  *
112  * By a system catalog, we mean one that is created during the bootstrap
113  * phase of initdb. That includes not just the catalogs per se, but
114  * also their indexes, and TOAST tables and indexes if any.
115  *
116  * This function does not perform any catalog accesses.
117  * Some callers rely on that!
118  */
119 bool
121 {
122  /*
123  * We consider a relation to be a system catalog if it has a pinned OID.
124  * This includes all the defined catalogs, their indexes, and their TOAST
125  * tables and indexes.
126  *
127  * This rule excludes the relations in information_schema, which are not
128  * integral to the system and can be treated the same as user relations.
129  * (Since it's valid to drop and recreate information_schema, any rule
130  * that did not act this way would be wrong.)
131  *
132  * This test is reliable since an OID wraparound will skip this range of
133  * OIDs; see GetNewObjectId().
134  */
135  return (relid < (Oid) FirstUnpinnedObjectId);
136 }
137 
138 /*
139  * IsToastRelation
140  * True iff relation is a TOAST support relation (or index).
141  *
142  * Does not perform any catalog accesses.
143  */
144 bool
146 {
147  /*
148  * What we actually check is whether the relation belongs to a pg_toast
149  * namespace. This should be equivalent because of restrictions that are
150  * enforced elsewhere against creating user relations in, or moving
151  * relations into/out of, a pg_toast namespace. Notice also that this
152  * will not say "true" for toast tables belonging to other sessions' temp
153  * tables; we expect that other mechanisms will prevent access to those.
154  */
155  return IsToastNamespace(RelationGetNamespace(relation));
156 }
157 
158 /*
159  * IsToastClass
160  * Like the above, but takes a Form_pg_class as argument.
161  * Used when we do not want to open the relation and have to
162  * search pg_class directly.
163  */
164 bool
166 {
167  Oid relnamespace = reltuple->relnamespace;
168 
169  return IsToastNamespace(relnamespace);
170 }
171 
172 /*
173  * IsCatalogNamespace
174  * True iff namespace is pg_catalog.
175  *
176  * Does not perform any catalog accesses.
177  *
178  * NOTE: the reason this isn't a macro is to avoid having to include
179  * catalog/pg_namespace.h in a lot of places.
180  */
181 bool
183 {
184  return namespaceId == PG_CATALOG_NAMESPACE;
185 }
186 
187 /*
188  * IsToastNamespace
189  * True iff namespace is pg_toast or my temporary-toast-table namespace.
190  *
191  * Does not perform any catalog accesses.
192  *
193  * Note: this will return false for temporary-toast-table namespaces belonging
194  * to other backends. Those are treated the same as other backends' regular
195  * temp table namespaces, and access is prevented where appropriate.
196  * If you need to check for those, you may be able to use isAnyTempNamespace,
197  * but beware that that does involve a catalog access.
198  */
199 bool
200 IsToastNamespace(Oid namespaceId)
201 {
202  return (namespaceId == PG_TOAST_NAMESPACE) ||
203  isTempToastNamespace(namespaceId);
204 }
205 
206 
207 /*
208  * IsReservedName
209  * True iff name starts with the pg_ prefix.
210  *
211  * For some classes of objects, the prefix pg_ is reserved for
212  * system objects only. As of 8.0, this was only true for
213  * schema and tablespace names. With 9.6, this is also true
214  * for roles.
215  */
216 bool
217 IsReservedName(const char *name)
218 {
219  /* ugly coding for speed */
220  return (name[0] == 'p' &&
221  name[1] == 'g' &&
222  name[2] == '_');
223 }
224 
225 
226 /*
227  * IsSharedRelation
228  * Given the OID of a relation, determine whether it's supposed to be
229  * shared across an entire database cluster.
230  *
231  * In older releases, this had to be hard-wired so that we could compute the
232  * locktag for a relation and lock it before examining its catalog entry.
233  * Since we now have MVCC catalog access, the race conditions that made that
234  * a hard requirement are gone, so we could look at relaxing this restriction.
235  * However, if we scanned the pg_class entry to find relisshared, and only
236  * then locked the relation, pg_class could get updated in the meantime,
237  * forcing us to scan the relation again, which would definitely be complex
238  * and might have undesirable performance consequences. Fortunately, the set
239  * of shared relations is fairly static, so a hand-maintained list of their
240  * OIDs isn't completely impractical.
241  */
242 bool
244 {
245  /* These are the shared catalogs (look for BKI_SHARED_RELATION) */
246  if (relationId == AuthIdRelationId ||
247  relationId == AuthMemRelationId ||
248  relationId == DatabaseRelationId ||
249  relationId == DbRoleSettingRelationId ||
250  relationId == ParameterAclRelationId ||
251  relationId == ReplicationOriginRelationId ||
252  relationId == SharedDependRelationId ||
253  relationId == SharedDescriptionRelationId ||
254  relationId == SharedSecLabelRelationId ||
255  relationId == SubscriptionRelationId ||
256  relationId == TableSpaceRelationId)
257  return true;
258  /* These are their indexes */
259  if (relationId == AuthIdOidIndexId ||
260  relationId == AuthIdRolnameIndexId ||
261  relationId == AuthMemMemRoleIndexId ||
262  relationId == AuthMemRoleMemIndexId ||
263  relationId == AuthMemOidIndexId ||
264  relationId == AuthMemGrantorIndexId ||
265  relationId == DatabaseNameIndexId ||
266  relationId == DatabaseOidIndexId ||
267  relationId == DbRoleSettingDatidRolidIndexId ||
268  relationId == ParameterAclOidIndexId ||
269  relationId == ParameterAclParnameIndexId ||
270  relationId == ReplicationOriginIdentIndex ||
271  relationId == ReplicationOriginNameIndex ||
272  relationId == SharedDependDependerIndexId ||
273  relationId == SharedDependReferenceIndexId ||
274  relationId == SharedDescriptionObjIndexId ||
275  relationId == SharedSecLabelObjectIndexId ||
276  relationId == SubscriptionNameIndexId ||
277  relationId == SubscriptionObjectIndexId ||
278  relationId == TablespaceNameIndexId ||
279  relationId == TablespaceOidIndexId)
280  return true;
281  /* These are their toast tables and toast indexes */
282  if (relationId == PgAuthidToastTable ||
283  relationId == PgAuthidToastIndex ||
284  relationId == PgDatabaseToastTable ||
285  relationId == PgDatabaseToastIndex ||
286  relationId == PgDbRoleSettingToastTable ||
287  relationId == PgDbRoleSettingToastIndex ||
288  relationId == PgParameterAclToastTable ||
289  relationId == PgParameterAclToastIndex ||
290  relationId == PgReplicationOriginToastTable ||
291  relationId == PgReplicationOriginToastIndex ||
292  relationId == PgShdescriptionToastTable ||
293  relationId == PgShdescriptionToastIndex ||
294  relationId == PgShseclabelToastTable ||
295  relationId == PgShseclabelToastIndex ||
296  relationId == PgSubscriptionToastTable ||
297  relationId == PgSubscriptionToastIndex ||
298  relationId == PgTablespaceToastTable ||
299  relationId == PgTablespaceToastIndex)
300  return true;
301  return false;
302 }
303 
304 /*
305  * IsPinnedObject
306  * Given the class + OID identity of a database object, report whether
307  * it is "pinned", that is not droppable because the system requires it.
308  *
309  * We used to represent this explicitly in pg_depend, but that proved to be
310  * an undesirable amount of overhead, so now we rely on an OID range test.
311  */
312 bool
313 IsPinnedObject(Oid classId, Oid objectId)
314 {
315  /*
316  * Objects with OIDs above FirstUnpinnedObjectId are never pinned. Since
317  * the OID generator skips this range when wrapping around, this check
318  * guarantees that user-defined objects are never considered pinned.
319  */
320  if (objectId >= FirstUnpinnedObjectId)
321  return false;
322 
323  /*
324  * Large objects are never pinned. We need this special case because
325  * their OIDs can be user-assigned.
326  */
327  if (classId == LargeObjectRelationId)
328  return false;
329 
330  /*
331  * There are a few objects defined in the catalog .dat files that, as a
332  * matter of policy, we prefer not to treat as pinned. We used to handle
333  * that by excluding them from pg_depend, but it's just as easy to
334  * hard-wire their OIDs here. (If the user does indeed drop and recreate
335  * them, they'll have new but certainly-unpinned OIDs, so no problem.)
336  *
337  * Checking both classId and objectId is overkill, since OIDs below
338  * FirstGenbkiObjectId should be globally unique, but do it anyway for
339  * robustness.
340  */
341 
342  /* the public namespace is not pinned */
343  if (classId == NamespaceRelationId &&
344  objectId == PG_PUBLIC_NAMESPACE)
345  return false;
346 
347  /*
348  * Databases are never pinned. It might seem that it'd be prudent to pin
349  * at least template0; but we do this intentionally so that template0 and
350  * template1 can be rebuilt from each other, thus letting them serve as
351  * mutual backups (as long as you've not modified template1, anyway).
352  */
353  if (classId == DatabaseRelationId)
354  return false;
355 
356  /*
357  * All other initdb-created objects are pinned. This is overkill (the
358  * system doesn't really depend on having every last weird datatype, for
359  * instance) but generating only the minimum required set of dependencies
360  * seems hard, and enforcing an accurate list would be much more expensive
361  * than the simple range test used here.
362  */
363  return true;
364 }
365 
366 
367 /*
368  * GetNewOidWithIndex
369  * Generate a new OID that is unique within the system relation.
370  *
371  * Since the OID is not immediately inserted into the table, there is a
372  * race condition here; but a problem could occur only if someone else
373  * managed to cycle through 2^32 OIDs and generate the same OID before we
374  * finish inserting our row. This seems unlikely to be a problem. Note
375  * that if we had to *commit* the row to end the race condition, the risk
376  * would be rather higher; therefore we use SnapshotAny in the test, so that
377  * we will see uncommitted rows. (We used to use SnapshotDirty, but that has
378  * the disadvantage that it ignores recently-deleted rows, creating a risk
379  * of transient conflicts for as long as our own MVCC snapshots think a
380  * recently-deleted row is live. The risk is far higher when selecting TOAST
381  * OIDs, because SnapshotToast considers dead rows as active indefinitely.)
382  *
383  * Note that we are effectively assuming that the table has a relatively small
384  * number of entries (much less than 2^32) and there aren't very long runs of
385  * consecutive existing OIDs. This is a mostly reasonable assumption for
386  * system catalogs.
387  *
388  * Caller must have a suitable lock on the relation.
389  */
390 Oid
391 GetNewOidWithIndex(Relation relation, Oid indexId, AttrNumber oidcolumn)
392 {
393  Oid newOid;
394  SysScanDesc scan;
396  bool collides;
397  uint64 retries = 0;
398  uint64 retries_before_log = GETNEWOID_LOG_THRESHOLD;
399 
400  /* Only system relations are supported */
401  Assert(IsSystemRelation(relation));
402 
403  /* In bootstrap mode, we don't have any indexes to use */
405  return GetNewObjectId();
406 
407  /*
408  * We should never be asked to generate a new pg_type OID during
409  * pg_upgrade; doing so would risk collisions with the OIDs it wants to
410  * assign. Hitting this assert means there's some path where we failed to
411  * ensure that a type OID is determined by commands in the dump script.
412  */
413  Assert(!IsBinaryUpgrade || RelationGetRelid(relation) != TypeRelationId);
414 
415  /* Generate new OIDs until we find one not in the table */
416  do
417  {
419 
420  newOid = GetNewObjectId();
421 
422  ScanKeyInit(&key,
423  oidcolumn,
424  BTEqualStrategyNumber, F_OIDEQ,
425  ObjectIdGetDatum(newOid));
426 
427  /* see notes above about using SnapshotAny */
428  scan = systable_beginscan(relation, indexId, true,
429  SnapshotAny, 1, &key);
430 
431  collides = HeapTupleIsValid(systable_getnext(scan));
432 
433  systable_endscan(scan);
434 
435  /*
436  * Log that we iterate more than GETNEWOID_LOG_THRESHOLD but have not
437  * yet found OID unused in the relation. Then repeat logging with
438  * exponentially increasing intervals until we iterate more than
439  * GETNEWOID_LOG_MAX_INTERVAL. Finally repeat logging every
440  * GETNEWOID_LOG_MAX_INTERVAL unless an unused OID is found. This
441  * logic is necessary not to fill up the server log with the similar
442  * messages.
443  */
444  if (retries >= retries_before_log)
445  {
446  ereport(LOG,
447  (errmsg("still searching for an unused OID in relation \"%s\"",
448  RelationGetRelationName(relation)),
449  errdetail_plural("OID candidates have been checked %llu time, but no unused OID has been found yet.",
450  "OID candidates have been checked %llu times, but no unused OID has been found yet.",
451  retries,
452  (unsigned long long) retries)));
453 
454  /*
455  * Double the number of retries to do before logging next until it
456  * reaches GETNEWOID_LOG_MAX_INTERVAL.
457  */
458  if (retries_before_log * 2 <= GETNEWOID_LOG_MAX_INTERVAL)
459  retries_before_log *= 2;
460  else
461  retries_before_log += GETNEWOID_LOG_MAX_INTERVAL;
462  }
463 
464  retries++;
465  } while (collides);
466 
467  /*
468  * If at least one log message is emitted, also log the completion of OID
469  * assignment.
470  */
471  if (retries > GETNEWOID_LOG_THRESHOLD)
472  {
473  ereport(LOG,
474  (errmsg_plural("new OID has been assigned in relation \"%s\" after %llu retry",
475  "new OID has been assigned in relation \"%s\" after %llu retries",
476  retries,
477  RelationGetRelationName(relation), (unsigned long long) retries)));
478  }
479 
480  return newOid;
481 }
482 
483 /*
484  * GetNewRelFileNumber
485  * Generate a new relfilenumber that is unique within the
486  * database of the given tablespace.
487  *
488  * If the relfilenumber will also be used as the relation's OID, pass the
489  * opened pg_class catalog, and this routine will guarantee that the result
490  * is also an unused OID within pg_class. If the result is to be used only
491  * as a relfilenumber for an existing relation, pass NULL for pg_class.
492  *
493  * As with GetNewOidWithIndex(), there is some theoretical risk of a race
494  * condition, but it doesn't seem worth worrying about.
495  *
496  * Note: we don't support using this in bootstrap mode. All relations
497  * created by bootstrap have preassigned OIDs, so there's no need.
498  */
500 GetNewRelFileNumber(Oid reltablespace, Relation pg_class, char relpersistence)
501 {
502  RelFileLocatorBackend rlocator;
503  char *rpath;
504  bool collides;
505  ProcNumber procNumber;
506 
507  /*
508  * If we ever get here during pg_upgrade, there's something wrong; all
509  * relfilenumber assignments during a binary-upgrade run should be
510  * determined by commands in the dump script.
511  */
513 
514  switch (relpersistence)
515  {
516  case RELPERSISTENCE_TEMP:
517  procNumber = ProcNumberForTempRelations();
518  break;
519  case RELPERSISTENCE_UNLOGGED:
520  case RELPERSISTENCE_PERMANENT:
521  procNumber = INVALID_PROC_NUMBER;
522  break;
523  default:
524  elog(ERROR, "invalid relpersistence: %c", relpersistence);
525  return InvalidRelFileNumber; /* placate compiler */
526  }
527 
528  /* This logic should match RelationInitPhysicalAddr */
529  rlocator.locator.spcOid = reltablespace ? reltablespace : MyDatabaseTableSpace;
530  rlocator.locator.dbOid =
531  (rlocator.locator.spcOid == GLOBALTABLESPACE_OID) ?
533 
534  /*
535  * The relpath will vary based on the backend number, so we must
536  * initialize that properly here to make sure that any collisions based on
537  * filename are properly detected.
538  */
539  rlocator.backend = procNumber;
540 
541  do
542  {
544 
545  /* Generate the OID */
546  if (pg_class)
547  rlocator.locator.relNumber = GetNewOidWithIndex(pg_class, ClassOidIndexId,
548  Anum_pg_class_oid);
549  else
550  rlocator.locator.relNumber = GetNewObjectId();
551 
552  /* Check for existing file of same name */
553  rpath = relpath(rlocator, MAIN_FORKNUM);
554 
555  if (access(rpath, F_OK) == 0)
556  {
557  /* definite collision */
558  collides = true;
559  }
560  else
561  {
562  /*
563  * Here we have a little bit of a dilemma: if errno is something
564  * other than ENOENT, should we declare a collision and loop? In
565  * practice it seems best to go ahead regardless of the errno. If
566  * there is a colliding file we will get an smgr failure when we
567  * attempt to create the new relation file.
568  */
569  collides = false;
570  }
571 
572  pfree(rpath);
573  } while (collides);
574 
575  return rlocator.locator.relNumber;
576 }
577 
578 /*
579  * SQL callable interface for GetNewOidWithIndex(). Outside of initdb's
580  * direct insertions into catalog tables, and recovering from corruption, this
581  * should rarely be needed.
582  *
583  * Function is intentionally not documented in the user facing docs.
584  */
585 Datum
587 {
588  Oid reloid = PG_GETARG_OID(0);
590  Oid idxoid = PG_GETARG_OID(2);
591  Relation rel;
592  Relation idx;
593  HeapTuple atttuple;
594  Form_pg_attribute attform;
595  AttrNumber attno;
596  Oid newoid;
597 
598  /*
599  * As this function is not intended to be used during normal running, and
600  * only supports system catalogs (which require superuser permissions to
601  * modify), just checking for superuser ought to not obstruct valid
602  * usecases.
603  */
604  if (!superuser())
605  ereport(ERROR,
606  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
607  errmsg("must be superuser to call %s()",
608  "pg_nextoid")));
609 
610  rel = table_open(reloid, RowExclusiveLock);
611  idx = index_open(idxoid, RowExclusiveLock);
612 
613  if (!IsSystemRelation(rel))
614  ereport(ERROR,
615  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
616  errmsg("pg_nextoid() can only be used on system catalogs")));
617 
618  if (idx->rd_index->indrelid != RelationGetRelid(rel))
619  ereport(ERROR,
620  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
621  errmsg("index \"%s\" does not belong to table \"%s\"",
623  RelationGetRelationName(rel))));
624 
625  atttuple = SearchSysCacheAttName(reloid, NameStr(*attname));
626  if (!HeapTupleIsValid(atttuple))
627  ereport(ERROR,
628  (errcode(ERRCODE_UNDEFINED_COLUMN),
629  errmsg("column \"%s\" of relation \"%s\" does not exist",
631 
632  attform = ((Form_pg_attribute) GETSTRUCT(atttuple));
633  attno = attform->attnum;
634 
635  if (attform->atttypid != OIDOID)
636  ereport(ERROR,
637  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
638  errmsg("column \"%s\" is not of type oid",
639  NameStr(*attname))));
640 
642  idx->rd_index->indkey.values[0] != attno)
643  ereport(ERROR,
644  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
645  errmsg("index \"%s\" is not the index for column \"%s\"",
647  NameStr(*attname))));
648 
649  newoid = GetNewOidWithIndex(rel, idxoid, attno);
650 
651  ReleaseSysCache(atttuple);
654 
655  PG_RETURN_OID(newoid);
656 }
657 
658 /*
659  * SQL callable interface for StopGeneratingPinnedObjectIds().
660  *
661  * This is only to be used by initdb, so it's intentionally not documented in
662  * the user facing docs.
663  */
664 Datum
666 {
667  /*
668  * Belt-and-suspenders check, since StopGeneratingPinnedObjectIds will
669  * fail anyway in non-single-user mode.
670  */
671  if (!superuser())
672  ereport(ERROR,
673  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
674  errmsg("must be superuser to call %s()",
675  "pg_stop_making_pinned_objects")));
676 
678 
679  PG_RETURN_VOID();
680 }
Datum idx(PG_FUNCTION_ARGS)
Definition: _int_op.c:259
int16 AttrNumber
Definition: attnum.h:21
#define NameStr(name)
Definition: c.h:746
#define Assert(condition)
Definition: c.h:858
bool IsToastRelation(Relation relation)
Definition: catalog.c:145
#define GETNEWOID_LOG_THRESHOLD
Definition: catalog.c:54
bool IsToastNamespace(Oid namespaceId)
Definition: catalog.c:200
bool IsSystemRelation(Relation relation)
Definition: catalog.c:73
Oid GetNewOidWithIndex(Relation relation, Oid indexId, AttrNumber oidcolumn)
Definition: catalog.c:391
RelFileNumber GetNewRelFileNumber(Oid reltablespace, Relation pg_class, char relpersistence)
Definition: catalog.c:500
bool IsCatalogNamespace(Oid namespaceId)
Definition: catalog.c:182
bool IsToastClass(Form_pg_class reltuple)
Definition: catalog.c:165
bool IsCatalogRelation(Relation relation)
Definition: catalog.c:103
bool IsPinnedObject(Oid classId, Oid objectId)
Definition: catalog.c:313
bool IsSharedRelation(Oid relationId)
Definition: catalog.c:243
bool IsCatalogRelationOid(Oid relid)
Definition: catalog.c:120
bool IsReservedName(const char *name)
Definition: catalog.c:217
#define GETNEWOID_LOG_MAX_INTERVAL
Definition: catalog.c:55
Datum pg_nextoid(PG_FUNCTION_ARGS)
Definition: catalog.c:586
bool IsSystemClass(Oid relid, Form_pg_class reltuple)
Definition: catalog.c:85
Datum pg_stop_making_pinned_objects(PG_FUNCTION_ARGS)
Definition: catalog.c:665
int errmsg_plural(const char *fmt_singular, const char *fmt_plural, unsigned long n,...)
Definition: elog.c:1180
int errdetail_plural(const char *fmt_singular, const char *fmt_plural, unsigned long n,...)
Definition: elog.c:1295
int errcode(int sqlerrcode)
Definition: elog.c:857
int errmsg(const char *fmt,...)
Definition: elog.c:1070
#define LOG
Definition: elog.h:31
#define ERROR
Definition: elog.h:39
#define elog(elevel,...)
Definition: elog.h:224
#define ereport(elevel,...)
Definition: elog.h:149
#define PG_RETURN_VOID()
Definition: fmgr.h:349
#define PG_GETARG_OID(n)
Definition: fmgr.h:275
#define PG_GETARG_NAME(n)
Definition: fmgr.h:278
#define PG_RETURN_OID(x)
Definition: fmgr.h:360
#define PG_FUNCTION_ARGS
Definition: fmgr.h:193
void systable_endscan(SysScanDesc sysscan)
Definition: genam.c:596
HeapTuple systable_getnext(SysScanDesc sysscan)
Definition: genam.c:503
SysScanDesc systable_beginscan(Relation heapRelation, Oid indexId, bool indexOK, Snapshot snapshot, int nkeys, ScanKey key)
Definition: genam.c:384
bool IsBinaryUpgrade
Definition: globals.c:118
Oid MyDatabaseTableSpace
Definition: globals.c:93
Oid MyDatabaseId
Definition: globals.c:91
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
#define GETSTRUCT(TUP)
Definition: htup_details.h:653
void index_close(Relation relation, LOCKMODE lockmode)
Definition: indexam.c:177
Relation index_open(Oid relationId, LOCKMODE lockmode)
Definition: indexam.c:133
#define RowExclusiveLock
Definition: lockdefs.h:38
void pfree(void *pointer)
Definition: mcxt.c:1520
#define IsBootstrapProcessingMode()
Definition: miscadmin.h:454
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:122
bool isTempToastNamespace(Oid namespaceId)
Definition: namespace.c:3646
NameData attname
Definition: pg_attribute.h:41
FormData_pg_attribute * Form_pg_attribute
Definition: pg_attribute.h:209
FormData_pg_class * Form_pg_class
Definition: pg_class.h:153
uintptr_t Datum
Definition: postgres.h:64
static Datum ObjectIdGetDatum(Oid X)
Definition: postgres.h:252
#define InvalidOid
Definition: postgres_ext.h:36
unsigned int Oid
Definition: postgres_ext.h:31
short access
Definition: preproc-type.c:36
#define ProcNumberForTempRelations()
Definition: proc.h:320
#define INVALID_PROC_NUMBER
Definition: procnumber.h:26
int ProcNumber
Definition: procnumber.h:24
#define RelationGetRelid(relation)
Definition: rel.h:505
#define RelationGetRelationName(relation)
Definition: rel.h:539
#define RelationGetNamespace(relation)
Definition: rel.h:546
#define IndexRelationGetNumberOfKeyAttributes(relation)
Definition: rel.h:524
Oid RelFileNumber
Definition: relpath.h:25
@ MAIN_FORKNUM
Definition: relpath.h:50
#define relpath(rlocator, forknum)
Definition: relpath.h:94
#define InvalidRelFileNumber
Definition: relpath.h:26
void ScanKeyInit(ScanKey entry, AttrNumber attributeNumber, StrategyNumber strategy, RegProcedure procedure, Datum argument)
Definition: scankey.c:76
#define SnapshotAny
Definition: snapmgr.h:33
#define BTEqualStrategyNumber
Definition: stratnum.h:31
RelFileLocator locator
RelFileNumber relNumber
Form_pg_class rd_rel
Definition: rel.h:111
Definition: c.h:741
bool superuser(void)
Definition: superuser.c:46
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:266
HeapTuple SearchSysCacheAttName(Oid relid, const char *attname)
Definition: syscache.c:359
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:126
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:40
#define FirstUnpinnedObjectId
Definition: transam.h:196
Oid GetNewObjectId(void)
Definition: varsup.c:555
void StopGeneratingPinnedObjectIds(void)
Definition: varsup.c:652
const char * name