PostgreSQL Source Code  git master
genam.c File Reference
#include "postgres.h"
#include "access/genam.h"
#include "access/heapam.h"
#include "access/relscan.h"
#include "access/tableam.h"
#include "access/transam.h"
#include "catalog/index.h"
#include "lib/stringinfo.h"
#include "miscadmin.h"
#include "storage/bufmgr.h"
#include "storage/procarray.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
#include "utils/rls.h"
#include "utils/ruleutils.h"
#include "utils/snapmgr.h"
#include "utils/syscache.h"
Include dependency graph for genam.c:

Go to the source code of this file.

Functions

IndexScanDesc RelationGetIndexScan (Relation indexRelation, int nkeys, int norderbys)
 
void IndexScanEnd (IndexScanDesc scan)
 
char * BuildIndexValueDescription (Relation indexRelation, Datum *values, bool *isnull)
 
TransactionId index_compute_xid_horizon_for_tuples (Relation irel, Relation hrel, Buffer ibuf, OffsetNumber *itemnos, int nitems)
 
SysScanDesc systable_beginscan (Relation heapRelation, Oid indexId, bool indexOK, Snapshot snapshot, int nkeys, ScanKey key)
 
static void HandleConcurrentAbort ()
 
HeapTuple systable_getnext (SysScanDesc sysscan)
 
bool systable_recheck_tuple (SysScanDesc sysscan, HeapTuple tup)
 
void systable_endscan (SysScanDesc sysscan)
 
SysScanDesc systable_beginscan_ordered (Relation heapRelation, Relation indexRelation, Snapshot snapshot, int nkeys, ScanKey key)
 
HeapTuple systable_getnext_ordered (SysScanDesc sysscan, ScanDirection direction)
 
void systable_endscan_ordered (SysScanDesc sysscan)
 

Function Documentation

◆ BuildIndexValueDescription()

char* BuildIndexValueDescription ( Relation  indexRelation,
Datum values,
bool isnull 
)

Definition at line 177 of file genam.c.

179 {
181  Form_pg_index idxrec;
182  int indnkeyatts;
183  int i;
184  int keyno;
185  Oid indexrelid = RelationGetRelid(indexRelation);
186  Oid indrelid;
187  AclResult aclresult;
188 
189  indnkeyatts = IndexRelationGetNumberOfKeyAttributes(indexRelation);
190 
191  /*
192  * Check permissions- if the user does not have access to view all of the
193  * key columns then return NULL to avoid leaking data.
194  *
195  * First check if RLS is enabled for the relation. If so, return NULL to
196  * avoid leaking data.
197  *
198  * Next we need to check table-level SELECT access and then, if there is
199  * no access there, check column-level permissions.
200  */
201  idxrec = indexRelation->rd_index;
202  indrelid = idxrec->indrelid;
203  Assert(indexrelid == idxrec->indexrelid);
204 
205  /* RLS check- if RLS is enabled then we don't return anything. */
206  if (check_enable_rls(indrelid, InvalidOid, true) == RLS_ENABLED)
207  return NULL;
208 
209  /* Table-level SELECT is enough, if the user has it */
210  aclresult = pg_class_aclcheck(indrelid, GetUserId(), ACL_SELECT);
211  if (aclresult != ACLCHECK_OK)
212  {
213  /*
214  * No table-level access, so step through the columns in the index and
215  * make sure the user has SELECT rights on all of them.
216  */
217  for (keyno = 0; keyno < indnkeyatts; keyno++)
218  {
219  AttrNumber attnum = idxrec->indkey.values[keyno];
220 
221  /*
222  * Note that if attnum == InvalidAttrNumber, then this is an index
223  * based on an expression and we return no detail rather than try
224  * to figure out what column(s) the expression includes and if the
225  * user has SELECT rights on them.
226  */
227  if (attnum == InvalidAttrNumber ||
230  {
231  /* No access, so clean up and return */
232  return NULL;
233  }
234  }
235  }
236 
238  appendStringInfo(&buf, "(%s)=(",
239  pg_get_indexdef_columns(indexrelid, true));
240 
241  for (i = 0; i < indnkeyatts; i++)
242  {
243  char *val;
244 
245  if (isnull[i])
246  val = "null";
247  else
248  {
249  Oid foutoid;
250  bool typisvarlena;
251 
252  /*
253  * The provided data is not necessarily of the type stored in the
254  * index; rather it is of the index opclass's input type. So look
255  * at rd_opcintype not the index tupdesc.
256  *
257  * Note: this is a bit shaky for opclasses that have pseudotype
258  * input types such as ANYARRAY or RECORD. Currently, the
259  * typoutput functions associated with the pseudotypes will work
260  * okay, but we might have to try harder in future.
261  */
262  getTypeOutputInfo(indexRelation->rd_opcintype[i],
263  &foutoid, &typisvarlena);
264  val = OidOutputFunctionCall(foutoid, values[i]);
265  }
266 
267  if (i > 0)
268  appendStringInfoString(&buf, ", ");
270  }
271 
272  appendStringInfoChar(&buf, ')');
273 
274  return buf.data;
275 }
AclResult
Definition: acl.h:183
@ ACLCHECK_OK
Definition: acl.h:184
AclResult pg_attribute_aclcheck(Oid table_oid, AttrNumber attnum, Oid roleid, AclMode mode)
Definition: aclchk.c:4617
AclResult pg_class_aclcheck(Oid table_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:4746
int16 AttrNumber
Definition: attnum.h:21
#define InvalidAttrNumber
Definition: attnum.h:23
static Datum values[MAXATTR]
Definition: bootstrap.c:156
char * OidOutputFunctionCall(Oid functionId, Datum val)
Definition: fmgr.c:1705
long val
Definition: informix.c:664
int i
Definition: isn.c:73
Assert(fmt[strlen(fmt) - 1] !='\n')
void getTypeOutputInfo(Oid type, Oid *typOutput, bool *typIsVarlena)
Definition: lsyscache.c:2865
Oid GetUserId(void)
Definition: miscinit.c:497
#define ACL_SELECT
Definition: parsenodes.h:84
int16 attnum
Definition: pg_attribute.h:83
FormData_pg_index * Form_pg_index
Definition: pg_index.h:70
static char * buf
Definition: pg_test_fsync.c:67
#define InvalidOid
Definition: postgres_ext.h:36
unsigned int Oid
Definition: postgres_ext.h:31
#define RelationGetRelid(relation)
Definition: rel.h:501
#define IndexRelationGetNumberOfKeyAttributes(relation)
Definition: rel.h:520
int check_enable_rls(Oid relid, Oid checkAsUser, bool noError)
Definition: rls.c:52
@ RLS_ENABLED
Definition: rls.h:45
char * pg_get_indexdef_columns(Oid indexrelid, bool pretty)
Definition: ruleutils.c:1187
void appendStringInfo(StringInfo str, const char *fmt,...)
Definition: stringinfo.c:91
void appendStringInfoString(StringInfo str, const char *s)
Definition: stringinfo.c:176
void appendStringInfoChar(StringInfo str, char ch)
Definition: stringinfo.c:188
void initStringInfo(StringInfo str)
Definition: stringinfo.c:59
Oid * rd_opcintype
Definition: rel.h:204
Form_pg_index rd_index
Definition: rel.h:188

References ACL_SELECT, ACLCHECK_OK, appendStringInfo(), appendStringInfoChar(), appendStringInfoString(), Assert(), attnum, buf, check_enable_rls(), getTypeOutputInfo(), GetUserId(), i, IndexRelationGetNumberOfKeyAttributes, initStringInfo(), InvalidAttrNumber, InvalidOid, OidOutputFunctionCall(), pg_attribute_aclcheck(), pg_class_aclcheck(), pg_get_indexdef_columns(), RelationData::rd_index, RelationData::rd_opcintype, RelationGetRelid, RLS_ENABLED, val, and values.

Referenced by _bt_check_unique(), check_exclusion_or_unique_constraint(), comparetup_index_btree(), and gist_page_items().

◆ HandleConcurrentAbort()

static void HandleConcurrentAbort ( )
inlinestatic

Definition at line 483 of file genam.c.

484 {
488  ereport(ERROR,
489  (errcode(ERRCODE_TRANSACTION_ROLLBACK),
490  errmsg("transaction aborted during system catalog scan")));
491 }
int errcode(int sqlerrcode)
Definition: elog.c:858
int errmsg(const char *fmt,...)
Definition: elog.c:1069
#define ERROR
Definition: elog.h:39
#define ereport(elevel,...)
Definition: elog.h:149
bool TransactionIdIsInProgress(TransactionId xid)
Definition: procarray.c:1386
bool TransactionIdDidCommit(TransactionId transactionId)
Definition: transam.c:125
#define TransactionIdIsValid(xid)
Definition: transam.h:41
TransactionId CheckXidAlive
Definition: xact.c:98

References CheckXidAlive, ereport, errcode(), errmsg(), ERROR, TransactionIdDidCommit(), TransactionIdIsInProgress(), and TransactionIdIsValid.

Referenced by systable_getnext(), systable_getnext_ordered(), and systable_recheck_tuple().

◆ index_compute_xid_horizon_for_tuples()

TransactionId index_compute_xid_horizon_for_tuples ( Relation  irel,
Relation  hrel,
Buffer  ibuf,
OffsetNumber itemnos,
int  nitems 
)

Definition at line 294 of file genam.c.

299 {
300  TM_IndexDeleteOp delstate;
301  TransactionId snapshotConflictHorizon = InvalidTransactionId;
302  Page ipage = BufferGetPage(ibuf);
303  IndexTuple itup;
304 
305  Assert(nitems > 0);
306 
307  delstate.irel = irel;
308  delstate.iblknum = BufferGetBlockNumber(ibuf);
309  delstate.bottomup = false;
310  delstate.bottomupfreespace = 0;
311  delstate.ndeltids = 0;
312  delstate.deltids = palloc(nitems * sizeof(TM_IndexDelete));
313  delstate.status = palloc(nitems * sizeof(TM_IndexStatus));
314 
315  /* identify what the index tuples about to be deleted point to */
316  for (int i = 0; i < nitems; i++)
317  {
318  OffsetNumber offnum = itemnos[i];
319  ItemId iitemid;
320 
321  iitemid = PageGetItemId(ipage, offnum);
322  itup = (IndexTuple) PageGetItem(ipage, iitemid);
323 
324  Assert(ItemIdIsDead(iitemid));
325 
326  ItemPointerCopy(&itup->t_tid, &delstate.deltids[i].tid);
327  delstate.deltids[i].id = delstate.ndeltids;
328  delstate.status[i].idxoffnum = offnum;
329  delstate.status[i].knowndeletable = true; /* LP_DEAD-marked */
330  delstate.status[i].promising = false; /* unused */
331  delstate.status[i].freespace = 0; /* unused */
332 
333  delstate.ndeltids++;
334  }
335 
336  /* determine the actual xid horizon */
337  snapshotConflictHorizon = table_index_delete_tuples(hrel, &delstate);
338 
339  /* assert tableam agrees that all items are deletable */
340  Assert(delstate.ndeltids == nitems);
341 
342  pfree(delstate.deltids);
343  pfree(delstate.status);
344 
345  return snapshotConflictHorizon;
346 }
BlockNumber BufferGetBlockNumber(Buffer buffer)
Definition: bufmgr.c:2763
static Page BufferGetPage(Buffer buffer)
Definition: bufmgr.h:280
Pointer Page
Definition: bufpage.h:78
static Item PageGetItem(Page page, ItemId itemId)
Definition: bufpage.h:351
static ItemId PageGetItemId(Page page, OffsetNumber offsetNumber)
Definition: bufpage.h:240
uint32 TransactionId
Definition: c.h:588
#define ItemIdIsDead(itemId)
Definition: itemid.h:113
static void ItemPointerCopy(const ItemPointerData *fromPointer, ItemPointerData *toPointer)
Definition: itemptr.h:172
IndexTupleData * IndexTuple
Definition: itup.h:53
void pfree(void *pointer)
Definition: mcxt.c:1306
void * palloc(Size size)
Definition: mcxt.c:1199
uint16 OffsetNumber
Definition: off.h:24
ItemPointerData t_tid
Definition: itup.h:37
TM_IndexStatus * status
Definition: tableam.h:231
int bottomupfreespace
Definition: tableam.h:226
Relation irel
Definition: tableam.h:223
TM_IndexDelete * deltids
Definition: tableam.h:230
BlockNumber iblknum
Definition: tableam.h:224
ItemPointerData tid
Definition: tableam.h:189
bool knowndeletable
Definition: tableam.h:196
bool promising
Definition: tableam.h:199
int16 freespace
Definition: tableam.h:200
OffsetNumber idxoffnum
Definition: tableam.h:195
static TransactionId table_index_delete_tuples(Relation rel, TM_IndexDeleteOp *delstate)
Definition: tableam.h:1327
#define InvalidTransactionId
Definition: transam.h:31

References Assert(), TM_IndexDeleteOp::bottomup, TM_IndexDeleteOp::bottomupfreespace, BufferGetBlockNumber(), BufferGetPage(), TM_IndexDeleteOp::deltids, TM_IndexStatus::freespace, i, TM_IndexDeleteOp::iblknum, TM_IndexDelete::id, TM_IndexStatus::idxoffnum, InvalidTransactionId, TM_IndexDeleteOp::irel, ItemIdIsDead, ItemPointerCopy(), TM_IndexStatus::knowndeletable, TM_IndexDeleteOp::ndeltids, PageGetItem(), PageGetItemId(), palloc(), pfree(), TM_IndexStatus::promising, TM_IndexDeleteOp::status, IndexTupleData::t_tid, table_index_delete_tuples(), and TM_IndexDelete::tid.

Referenced by _hash_vacuum_one_page(), and gistprunepage().

◆ IndexScanEnd()

void IndexScanEnd ( IndexScanDesc  scan)

Definition at line 145 of file genam.c.

146 {
147  if (scan->keyData != NULL)
148  pfree(scan->keyData);
149  if (scan->orderByData != NULL)
150  pfree(scan->orderByData);
151 
152  pfree(scan);
153 }
struct ScanKeyData * keyData
Definition: relscan.h:122
struct ScanKeyData * orderByData
Definition: relscan.h:123

References IndexScanDescData::keyData, IndexScanDescData::orderByData, and pfree().

Referenced by index_endscan().

◆ RelationGetIndexScan()

IndexScanDesc RelationGetIndexScan ( Relation  indexRelation,
int  nkeys,
int  norderbys 
)

Definition at line 81 of file genam.c.

82 {
83  IndexScanDesc scan;
84 
85  scan = (IndexScanDesc) palloc(sizeof(IndexScanDescData));
86 
87  scan->heapRelation = NULL; /* may be set later */
88  scan->xs_heapfetch = NULL;
89  scan->indexRelation = indexRelation;
90  scan->xs_snapshot = InvalidSnapshot; /* caller must initialize this */
91  scan->numberOfKeys = nkeys;
92  scan->numberOfOrderBys = norderbys;
93 
94  /*
95  * We allocate key workspace here, but it won't get filled until amrescan.
96  */
97  if (nkeys > 0)
98  scan->keyData = (ScanKey) palloc(sizeof(ScanKeyData) * nkeys);
99  else
100  scan->keyData = NULL;
101  if (norderbys > 0)
102  scan->orderByData = (ScanKey) palloc(sizeof(ScanKeyData) * norderbys);
103  else
104  scan->orderByData = NULL;
105 
106  scan->xs_want_itup = false; /* may be set later */
107 
108  /*
109  * During recovery we ignore killed tuples and don't bother to kill them
110  * either. We do this because the xmin on the primary node could easily be
111  * later than the xmin on the standby node, so that what the primary
112  * thinks is killed is supposed to be visible on standby. So for correct
113  * MVCC for queries during recovery we must ignore these hints and check
114  * all tuples. Do *not* set ignore_killed_tuples to true when running in a
115  * transaction that was started during recovery. xactStartedInRecovery
116  * should not be altered by index AMs.
117  */
118  scan->kill_prior_tuple = false;
121 
122  scan->opaque = NULL;
123 
124  scan->xs_itup = NULL;
125  scan->xs_itupdesc = NULL;
126  scan->xs_hitup = NULL;
127  scan->xs_hitupdesc = NULL;
128 
129  return scan;
130 }
struct IndexScanDescData * IndexScanDesc
Definition: genam.h:89
ScanKeyData * ScanKey
Definition: skey.h:75
#define InvalidSnapshot
Definition: snapshot.h:123
HeapTuple xs_hitup
Definition: relscan.h:144
bool ignore_killed_tuples
Definition: relscan.h:129
IndexFetchTableData * xs_heapfetch
Definition: relscan.h:150
int numberOfOrderBys
Definition: relscan.h:121
bool xactStartedInRecovery
Definition: relscan.h:130
IndexTuple xs_itup
Definition: relscan.h:142
bool kill_prior_tuple
Definition: relscan.h:128
struct TupleDescData * xs_hitupdesc
Definition: relscan.h:145
struct TupleDescData * xs_itupdesc
Definition: relscan.h:143
Relation indexRelation
Definition: relscan.h:118
struct SnapshotData * xs_snapshot
Definition: relscan.h:119
Relation heapRelation
Definition: relscan.h:117
bool TransactionStartedDuringRecovery(void)
Definition: xact.c:1026

References IndexScanDescData::heapRelation, IndexScanDescData::ignore_killed_tuples, IndexScanDescData::indexRelation, InvalidSnapshot, IndexScanDescData::keyData, IndexScanDescData::kill_prior_tuple, IndexScanDescData::numberOfKeys, IndexScanDescData::numberOfOrderBys, IndexScanDescData::opaque, IndexScanDescData::orderByData, palloc(), TransactionStartedDuringRecovery(), IndexScanDescData::xactStartedInRecovery, IndexScanDescData::xs_heapfetch, IndexScanDescData::xs_hitup, IndexScanDescData::xs_hitupdesc, IndexScanDescData::xs_itup, IndexScanDescData::xs_itupdesc, IndexScanDescData::xs_snapshot, and IndexScanDescData::xs_want_itup.

Referenced by blbeginscan(), brinbeginscan(), btbeginscan(), dibeginscan(), ginbeginscan(), gistbeginscan(), hashbeginscan(), and spgbeginscan().

◆ systable_beginscan()

SysScanDesc systable_beginscan ( Relation  heapRelation,
Oid  indexId,
bool  indexOK,
Snapshot  snapshot,
int  nkeys,
ScanKey  key 
)

Definition at line 387 of file genam.c.

392 {
393  SysScanDesc sysscan;
394  Relation irel;
395 
396  if (indexOK &&
398  !ReindexIsProcessingIndex(indexId))
399  irel = index_open(indexId, AccessShareLock);
400  else
401  irel = NULL;
402 
403  sysscan = (SysScanDesc) palloc(sizeof(SysScanDescData));
404 
405  sysscan->heap_rel = heapRelation;
406  sysscan->irel = irel;
407  sysscan->slot = table_slot_create(heapRelation, NULL);
408 
409  if (snapshot == NULL)
410  {
411  Oid relid = RelationGetRelid(heapRelation);
412 
413  snapshot = RegisterSnapshot(GetCatalogSnapshot(relid));
414  sysscan->snapshot = snapshot;
415  }
416  else
417  {
418  /* Caller is responsible for any snapshot. */
419  sysscan->snapshot = NULL;
420  }
421 
422  if (irel)
423  {
424  int i;
425 
426  /* Change attribute numbers to be index column numbers. */
427  for (i = 0; i < nkeys; i++)
428  {
429  int j;
430 
431  for (j = 0; j < IndexRelationGetNumberOfAttributes(irel); j++)
432  {
433  if (key[i].sk_attno == irel->rd_index->indkey.values[j])
434  {
435  key[i].sk_attno = j + 1;
436  break;
437  }
438  }
440  elog(ERROR, "column is not in index");
441  }
442 
443  sysscan->iscan = index_beginscan(heapRelation, irel,
444  snapshot, nkeys, 0);
445  index_rescan(sysscan->iscan, key, nkeys, NULL, 0);
446  sysscan->scan = NULL;
447  }
448  else
449  {
450  /*
451  * We disallow synchronized scans when forced to use a heapscan on a
452  * catalog. In most cases the desired rows are near the front, so
453  * that the unpredictable start point of a syncscan is a serious
454  * disadvantage; and there are no compensating advantages, because
455  * it's unlikely that such scans will occur in parallel.
456  */
457  sysscan->scan = table_beginscan_strat(heapRelation, snapshot,
458  nkeys, key,
459  true, false);
460  sysscan->iscan = NULL;
461  }
462 
463  /*
464  * If CheckXidAlive is set then set a flag to indicate that system table
465  * scan is in-progress. See detailed comments in xact.c where these
466  * variables are declared.
467  */
469  bsysscan = true;
470 
471  return sysscan;
472 }
struct SysScanDescData * SysScanDesc
Definition: genam.h:90
bool ReindexIsProcessingIndex(Oid indexOid)
Definition: index.c:4035
IndexScanDesc index_beginscan(Relation heapRelation, Relation indexRelation, Snapshot snapshot, int nkeys, int norderbys)
Definition: indexam.c:205
Relation index_open(Oid relationId, LOCKMODE lockmode)
Definition: indexam.c:132
void index_rescan(IndexScanDesc scan, ScanKey keys, int nkeys, ScanKey orderbys, int norderbys)
Definition: indexam.c:301
int j
Definition: isn.c:74
#define AccessShareLock
Definition: lockdefs.h:36
bool IgnoreSystemIndexes
Definition: miscinit.c:80
#define IndexRelationGetNumberOfAttributes(relation)
Definition: rel.h:513
Snapshot GetCatalogSnapshot(Oid relid)
Definition: snapmgr.c:387
Snapshot RegisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:829
Relation irel
Definition: relscan.h:184
Relation heap_rel
Definition: relscan.h:183
struct SnapshotData * snapshot
Definition: relscan.h:187
struct IndexScanDescData * iscan
Definition: relscan.h:186
struct TupleTableSlot * slot
Definition: relscan.h:188
struct TableScanDescData * scan
Definition: relscan.h:185
TupleTableSlot * table_slot_create(Relation relation, List **reglist)
Definition: tableam.c:91
static TableScanDesc table_beginscan_strat(Relation rel, Snapshot snapshot, int nkeys, struct ScanKeyData *key, bool allow_strat, bool allow_sync)
Definition: tableam.h:909
bool bsysscan
Definition: xact.c:99

References AccessShareLock, bsysscan, CheckXidAlive, elog(), ERROR, GetCatalogSnapshot(), SysScanDescData::heap_rel, i, IgnoreSystemIndexes, index_beginscan(), index_open(), index_rescan(), IndexRelationGetNumberOfAttributes, SysScanDescData::irel, SysScanDescData::iscan, j, sort-test::key, palloc(), RelationData::rd_index, RegisterSnapshot(), ReindexIsProcessingIndex(), RelationGetRelid, SysScanDescData::scan, SysScanDescData::slot, SysScanDescData::snapshot, table_beginscan_strat(), table_slot_create(), and TransactionIdIsValid.

Referenced by AfterTriggerSetState(), AlterConstraintNamespaces(), AlterDatabase(), AlterDatabaseOwner(), AlterDatabaseRefreshColl(), AlterDomainDropConstraint(), AlterDomainValidateConstraint(), AlterExtensionNamespace(), AlterPolicy(), AlterSeqNamespaces(), AlterSetting(), AlterTypeRecurse(), ApplyExtensionUpdates(), ApplySetting(), ATExecAddOf(), ATExecAlterColumnType(), ATExecAlterConstraint(), ATExecAlterConstrRecurse(), ATExecAttachPartition(), ATExecDropConstraint(), ATExecValidateConstraint(), ATPrepChangePersistence(), AttrDefaultFetch(), change_owner_fix_column_acls(), change_owner_recurse_to_sequences(), changeDependenciesOf(), changeDependenciesOn(), changeDependencyFor(), CheckConstraintFetch(), checkSharedDependencies(), ChooseConstraintName(), CloneFkReferenced(), CloneRowTriggersToPartition(), ConstraintNameExists(), ConstraintNameIsUsed(), CopyStatistics(), copyTemplateDependencies(), CountDBSubscriptions(), CreateComments(), CreateInheritance(), CreatePolicy(), CreateSharedComments(), CreateTriggerFiringOn(), DefineOpClass(), DefineTSConfiguration(), DeleteAttributeTuples(), DeleteComments(), deleteDependencyRecordsFor(), deleteDependencyRecordsForClass(), deleteDependencyRecordsForSpecific(), DeleteInheritsTuple(), DeleteInitPrivs(), deleteOneObject(), DeleteSecurityLabel(), DeleteSharedComments(), DeleteSharedSecurityLabel(), DeleteSystemAttributeTuples(), drop_parent_dependency(), DropClonedTriggersFromPartition(), DropConfigurationMapping(), dropDatabaseDependencies(), DropObjectById(), DropRole(), EnableDisableTrigger(), EnumValuesDelete(), exec_object_restorecon(), ExecAlterExtensionStmt(), ExecGrant_Largeobject(), extension_config_remove(), fetch_statentries_for_relation(), find_composite_type_dependencies(), find_inheritance_children_extended(), findDependentObjects(), get_catalog_object_by_oid(), get_database_oid(), get_db_info(), get_domain_constraint_oid(), get_extension_name(), get_extension_oid(), get_extension_schema(), get_index_constraint(), get_index_ref_constraints(), get_partition_parent_worker(), get_pkey_attnames(), get_primary_key_attnos(), get_relation_constraint_attnos(), get_relation_constraint_oid(), get_relation_idx_constraint_oid(), get_relation_policy_oid(), get_rels_with_domain(), get_trigger_oid(), GetAllTablesPublications(), GetAttrDefaultColumnAddress(), GetAttrDefaultOid(), getAutoExtensionsOfObject(), GetComment(), GetDatabaseTuple(), GetDatabaseTupleByOid(), GetDefaultOpClass(), getExtensionOfObject(), GetForeignKeyActionTriggers(), GetForeignKeyCheckTriggers(), GetNewOidWithIndex(), getObjectDescription(), getObjectIdentityParts(), getOwnedSequences_internal(), GetParentedForeignKeyRefs(), GetPublicationRelations(), GetPublicationSchemas(), GetSecurityLabel(), GetSharedSecurityLabel(), GetSubscriptionRelations(), has_superclass(), HasSubscriptionRelations(), heap_truncate_find_FKs(), index_concurrently_swap(), IndexSetParentIndex(), is_schema_publication(), LargeObjectDrop(), LargeObjectExists(), load_domaintype_info(), load_enum_cache_data(), LookupOpclassInfo(), makeConfigurationDependencies(), MakeConfigurationMapping(), MarkInheritDetached(), MergeConstraintsIntoExisting(), MergeWithExistingConstraint(), movedb(), myLargeObjectExists(), object_ownercheck(), PartitionHasPendingDetach(), pg_extension_config_dump(), pg_get_constraintdef_worker(), pg_get_serial_sequence(), pg_get_triggerdef_worker(), pg_largeobject_aclmask_snapshot(), RangeDelete(), recordExtensionInitPrivWorker(), recordExtObjInitPriv(), relation_has_policies(), RelationBuildPartitionDesc(), RelationBuildRowSecurity(), RelationBuildRuleLock(), RelationBuildTriggers(), RelationBuildTupleDesc(), RelationGetExclusionInfo(), RelationGetFKeyList(), RelationGetIndexList(), RelationGetStatExtList(), RelationRemoveInheritance(), RelidByRelfilenumber(), RemoveAttrDefault(), RemoveAttrDefaultById(), RemoveExtensionById(), RemoveInheritance(), RemovePolicyById(), RemoveRewriteRuleById(), RemoveRoleFromObjectACL(), RemoveRoleFromObjectPolicy(), RemoveStatistics(), RemoveTriggerById(), RemoveTSConfigurationById(), rename_policy(), renametrig(), renametrig_internal(), renametrig_partition(), replorigin_create(), ScanPgRelation(), SearchCatCacheList(), SearchCatCacheMiss(), sepgsql_attribute_post_create(), sepgsql_database_post_create(), sepgsql_proc_post_create(), sepgsql_proc_setattr(), sepgsql_relation_post_create(), sepgsql_relation_setattr(), sepgsql_relation_setattr_extra(), sepgsql_schema_post_create(), sequenceIsOwned(), SetSecurityLabel(), SetSharedSecurityLabel(), shdepChangeDep(), shdepDropDependency(), shdepDropOwned(), shdepReassignOwned(), toastrel_valueid_exists(), TriggerSetParentTrigger(), tryAttachPartitionForeignKey(), typeInheritsFrom(), vac_update_datfrozenxid(), and validatePartitionedIndex().

◆ systable_beginscan_ordered()

SysScanDesc systable_beginscan_ordered ( Relation  heapRelation,
Relation  indexRelation,
Snapshot  snapshot,
int  nkeys,
ScanKey  key 
)

Definition at line 646 of file genam.c.

650 {
651  SysScanDesc sysscan;
652  int i;
653 
654  /* REINDEX can probably be a hard error here ... */
655  if (ReindexIsProcessingIndex(RelationGetRelid(indexRelation)))
656  elog(ERROR, "cannot do ordered scan on index \"%s\", because it is being reindexed",
657  RelationGetRelationName(indexRelation));
658  /* ... but we only throw a warning about violating IgnoreSystemIndexes */
660  elog(WARNING, "using index \"%s\" despite IgnoreSystemIndexes",
661  RelationGetRelationName(indexRelation));
662 
663  sysscan = (SysScanDesc) palloc(sizeof(SysScanDescData));
664 
665  sysscan->heap_rel = heapRelation;
666  sysscan->irel = indexRelation;
667  sysscan->slot = table_slot_create(heapRelation, NULL);
668 
669  if (snapshot == NULL)
670  {
671  Oid relid = RelationGetRelid(heapRelation);
672 
673  snapshot = RegisterSnapshot(GetCatalogSnapshot(relid));
674  sysscan->snapshot = snapshot;
675  }
676  else
677  {
678  /* Caller is responsible for any snapshot. */
679  sysscan->snapshot = NULL;
680  }
681 
682  /* Change attribute numbers to be index column numbers. */
683  for (i = 0; i < nkeys; i++)
684  {
685  int j;
686 
687  for (j = 0; j < IndexRelationGetNumberOfAttributes(indexRelation); j++)
688  {
689  if (key[i].sk_attno == indexRelation->rd_index->indkey.values[j])
690  {
691  key[i].sk_attno = j + 1;
692  break;
693  }
694  }
695  if (j == IndexRelationGetNumberOfAttributes(indexRelation))
696  elog(ERROR, "column is not in index");
697  }
698 
699  sysscan->iscan = index_beginscan(heapRelation, indexRelation,
700  snapshot, nkeys, 0);
701  index_rescan(sysscan->iscan, key, nkeys, NULL, 0);
702  sysscan->scan = NULL;
703 
704  return sysscan;
705 }
#define WARNING
Definition: elog.h:36
#define RelationGetRelationName(relation)
Definition: rel.h:535

References elog(), ERROR, GetCatalogSnapshot(), SysScanDescData::heap_rel, i, IgnoreSystemIndexes, index_beginscan(), index_rescan(), IndexRelationGetNumberOfAttributes, SysScanDescData::irel, SysScanDescData::iscan, j, sort-test::key, palloc(), RelationData::rd_index, RegisterSnapshot(), ReindexIsProcessingIndex(), RelationGetRelationName, RelationGetRelid, SysScanDescData::scan, SysScanDescData::slot, SysScanDescData::snapshot, table_slot_create(), and WARNING.

Referenced by BuildEventTriggerCache(), check_toasted_attribute(), enum_endpoint(), enum_range_internal(), heap_fetch_toast_slice(), inv_getsize(), inv_read(), inv_truncate(), inv_write(), lookup_ts_config_cache(), and toast_delete_datum().

◆ systable_endscan()

void systable_endscan ( SysScanDesc  sysscan)

Definition at line 599 of file genam.c.

600 {
601  if (sysscan->slot)
602  {
604  sysscan->slot = NULL;
605  }
606 
607  if (sysscan->irel)
608  {
609  index_endscan(sysscan->iscan);
610  index_close(sysscan->irel, AccessShareLock);
611  }
612  else
613  table_endscan(sysscan->scan);
614 
615  if (sysscan->snapshot)
616  UnregisterSnapshot(sysscan->snapshot);
617 
618  /*
619  * Reset the bsysscan flag at the end of the systable scan. See detailed
620  * comments in xact.c where these variables are declared.
621  */
623  bsysscan = false;
624 
625  pfree(sysscan);
626 }
void ExecDropSingleTupleTableSlot(TupleTableSlot *slot)
Definition: execTuples.c:1254
void index_close(Relation relation, LOCKMODE lockmode)
Definition: indexam.c:158
void index_endscan(IndexScanDesc scan)
Definition: indexam.c:327
void UnregisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:871
static void table_endscan(TableScanDesc scan)
Definition: tableam.h:993

References AccessShareLock, bsysscan, CheckXidAlive, ExecDropSingleTupleTableSlot(), index_close(), index_endscan(), SysScanDescData::irel, SysScanDescData::iscan, pfree(), SysScanDescData::scan, SysScanDescData::slot, SysScanDescData::snapshot, table_endscan(), TransactionIdIsValid, and UnregisterSnapshot().

Referenced by AfterTriggerSetState(), AlterConstraintNamespaces(), AlterDatabase(), AlterDatabaseOwner(), AlterDatabaseRefreshColl(), AlterDomainDropConstraint(), AlterDomainValidateConstraint(), AlterExtensionNamespace(), AlterPolicy(), AlterSeqNamespaces(), AlterSetting(), AlterTypeRecurse(), ApplyExtensionUpdates(), ApplySetting(), ATExecAddOf(), ATExecAlterColumnType(), ATExecAlterConstraint(), ATExecAlterConstrRecurse(), ATExecAttachPartition(), ATExecDropConstraint(), ATExecValidateConstraint(), ATPrepChangePersistence(), AttrDefaultFetch(), change_owner_fix_column_acls(), change_owner_recurse_to_sequences(), changeDependenciesOf(), changeDependenciesOn(), changeDependencyFor(), CheckConstraintFetch(), checkSharedDependencies(), ChooseConstraintName(), CloneFkReferenced(), CloneRowTriggersToPartition(), ConstraintNameExists(), ConstraintNameIsUsed(), CopyStatistics(), copyTemplateDependencies(), CountDBSubscriptions(), CreateComments(), CreateInheritance(), CreatePolicy(), CreateSharedComments(), CreateTriggerFiringOn(), DefineOpClass(), DefineTSConfiguration(), DeleteAttributeTuples(), DeleteComments(), deleteDependencyRecordsFor(), deleteDependencyRecordsForClass(), deleteDependencyRecordsForSpecific(), DeleteInheritsTuple(), DeleteInitPrivs(), deleteOneObject(), DeleteSecurityLabel(), DeleteSharedComments(), DeleteSharedSecurityLabel(), DeleteSystemAttributeTuples(), drop_parent_dependency(), DropClonedTriggersFromPartition(), DropConfigurationMapping(), dropDatabaseDependencies(), DropObjectById(), DropRole(), EnableDisableTrigger(), EnumValuesDelete(), exec_object_restorecon(), ExecAlterExtensionStmt(), ExecGrant_Largeobject(), extension_config_remove(), fetch_statentries_for_relation(), find_composite_type_dependencies(), find_inheritance_children_extended(), findDependentObjects(), get_catalog_object_by_oid(), get_database_oid(), get_db_info(), get_domain_constraint_oid(), get_extension_name(), get_extension_oid(), get_extension_schema(), get_index_constraint(), get_index_ref_constraints(), get_partition_parent_worker(), get_pkey_attnames(), get_primary_key_attnos(), get_relation_constraint_attnos(), get_relation_constraint_oid(), get_relation_idx_constraint_oid(), get_relation_policy_oid(), get_rels_with_domain(), get_trigger_oid(), GetAllTablesPublications(), GetAttrDefaultColumnAddress(), GetAttrDefaultOid(), getAutoExtensionsOfObject(), GetComment(), GetDatabaseTuple(), GetDatabaseTupleByOid(), GetDefaultOpClass(), getExtensionOfObject(), GetForeignKeyActionTriggers(), GetForeignKeyCheckTriggers(), GetNewOidWithIndex(), getObjectDescription(), getObjectIdentityParts(), getOwnedSequences_internal(), GetParentedForeignKeyRefs(), GetPublicationRelations(), GetPublicationSchemas(), GetSecurityLabel(), GetSharedSecurityLabel(), GetSubscriptionRelations(), has_superclass(), HasSubscriptionRelations(), heap_truncate_find_FKs(), index_concurrently_swap(), IndexSetParentIndex(), is_schema_publication(), LargeObjectDrop(), LargeObjectExists(), load_domaintype_info(), load_enum_cache_data(), LookupOpclassInfo(), makeConfigurationDependencies(), MakeConfigurationMapping(), MarkInheritDetached(), MergeConstraintsIntoExisting(), MergeWithExistingConstraint(), movedb(), myLargeObjectExists(), object_ownercheck(), PartitionHasPendingDetach(), pg_extension_config_dump(), pg_get_constraintdef_worker(), pg_get_serial_sequence(), pg_get_triggerdef_worker(), pg_largeobject_aclmask_snapshot(), RangeDelete(), recordExtensionInitPrivWorker(), recordExtObjInitPriv(), relation_has_policies(), RelationBuildPartitionDesc(), RelationBuildRowSecurity(), RelationBuildRuleLock(), RelationBuildTriggers(), RelationBuildTupleDesc(), RelationGetExclusionInfo(), RelationGetFKeyList(), RelationGetIndexList(), RelationGetStatExtList(), RelationRemoveInheritance(), RelidByRelfilenumber(), RemoveAttrDefault(), RemoveAttrDefaultById(), RemoveExtensionById(), RemoveInheritance(), RemovePolicyById(), RemoveRewriteRuleById(), RemoveRoleFromObjectACL(), RemoveRoleFromObjectPolicy(), RemoveStatistics(), RemoveTriggerById(), RemoveTSConfigurationById(), rename_policy(), renametrig(), renametrig_internal(), renametrig_partition(), replorigin_create(), ScanPgRelation(), SearchCatCacheList(), SearchCatCacheMiss(), sepgsql_attribute_post_create(), sepgsql_database_post_create(), sepgsql_proc_post_create(), sepgsql_proc_setattr(), sepgsql_relation_post_create(), sepgsql_relation_setattr(), sepgsql_relation_setattr_extra(), sepgsql_schema_post_create(), sequenceIsOwned(), SetSecurityLabel(), SetSharedSecurityLabel(), shdepChangeDep(), shdepDropDependency(), shdepDropOwned(), shdepReassignOwned(), toastrel_valueid_exists(), TriggerSetParentTrigger(), tryAttachPartitionForeignKey(), typeInheritsFrom(), vac_update_datfrozenxid(), and validatePartitionedIndex().

◆ systable_endscan_ordered()

void systable_endscan_ordered ( SysScanDesc  sysscan)

◆ systable_getnext()

HeapTuple systable_getnext ( SysScanDesc  sysscan)

Definition at line 506 of file genam.c.

507 {
508  HeapTuple htup = NULL;
509 
510  if (sysscan->irel)
511  {
512  if (index_getnext_slot(sysscan->iscan, ForwardScanDirection, sysscan->slot))
513  {
514  bool shouldFree;
515 
516  htup = ExecFetchSlotHeapTuple(sysscan->slot, false, &shouldFree);
517  Assert(!shouldFree);
518 
519  /*
520  * We currently don't need to support lossy index operators for
521  * any system catalog scan. It could be done here, using the scan
522  * keys to drive the operator calls, if we arranged to save the
523  * heap attnums during systable_beginscan(); this is practical
524  * because we still wouldn't need to support indexes on
525  * expressions.
526  */
527  if (sysscan->iscan->xs_recheck)
528  elog(ERROR, "system catalog scans with lossy index conditions are not implemented");
529  }
530  }
531  else
532  {
533  if (table_scan_getnextslot(sysscan->scan, ForwardScanDirection, sysscan->slot))
534  {
535  bool shouldFree;
536 
537  htup = ExecFetchSlotHeapTuple(sysscan->slot, false, &shouldFree);
538  Assert(!shouldFree);
539  }
540  }
541 
542  /*
543  * Handle the concurrent abort while fetching the catalog tuple during
544  * logical streaming of a transaction.
545  */
547 
548  return htup;
549 }
HeapTuple ExecFetchSlotHeapTuple(TupleTableSlot *slot, bool materialize, bool *shouldFree)
Definition: execTuples.c:1644
static void HandleConcurrentAbort()
Definition: genam.c:483
bool index_getnext_slot(IndexScanDesc scan, ScanDirection direction, TupleTableSlot *slot)
Definition: indexam.c:624
@ ForwardScanDirection
Definition: sdir.h:26
static bool table_scan_getnextslot(TableScanDesc sscan, ScanDirection direction, TupleTableSlot *slot)
Definition: tableam.h:1034

References Assert(), elog(), ERROR, ExecFetchSlotHeapTuple(), ForwardScanDirection, HandleConcurrentAbort(), index_getnext_slot(), SysScanDescData::irel, SysScanDescData::iscan, SysScanDescData::scan, SysScanDescData::slot, table_scan_getnextslot(), and IndexScanDescData::xs_recheck.

Referenced by AfterTriggerSetState(), AlterConstraintNamespaces(), AlterDatabase(), AlterDatabaseOwner(), AlterDatabaseRefreshColl(), AlterDomainDropConstraint(), AlterDomainValidateConstraint(), AlterExtensionNamespace(), AlterPolicy(), AlterSeqNamespaces(), AlterSetting(), AlterTypeRecurse(), ApplyExtensionUpdates(), ApplySetting(), ATExecAddOf(), ATExecAlterColumnType(), ATExecAlterConstraint(), ATExecAlterConstrRecurse(), ATExecAttachPartition(), ATExecDropConstraint(), ATExecValidateConstraint(), ATPrepChangePersistence(), AttrDefaultFetch(), change_owner_fix_column_acls(), change_owner_recurse_to_sequences(), changeDependenciesOf(), changeDependenciesOn(), changeDependencyFor(), CheckConstraintFetch(), checkSharedDependencies(), ChooseConstraintName(), CloneFkReferenced(), CloneRowTriggersToPartition(), ConstraintNameExists(), ConstraintNameIsUsed(), CopyStatistics(), copyTemplateDependencies(), CountDBSubscriptions(), CreateComments(), CreateInheritance(), CreatePolicy(), CreateSharedComments(), CreateTriggerFiringOn(), DefineOpClass(), DefineTSConfiguration(), DeleteAttributeTuples(), DeleteComments(), deleteDependencyRecordsFor(), deleteDependencyRecordsForClass(), deleteDependencyRecordsForSpecific(), DeleteInheritsTuple(), DeleteInitPrivs(), deleteOneObject(), DeleteSecurityLabel(), DeleteSharedComments(), DeleteSharedSecurityLabel(), DeleteSystemAttributeTuples(), drop_parent_dependency(), DropClonedTriggersFromPartition(), DropConfigurationMapping(), dropDatabaseDependencies(), DropObjectById(), DropRole(), EnableDisableTrigger(), EnumValuesDelete(), exec_object_restorecon(), ExecAlterExtensionStmt(), ExecGrant_Largeobject(), extension_config_remove(), fetch_statentries_for_relation(), find_composite_type_dependencies(), find_inheritance_children_extended(), findDependentObjects(), get_catalog_object_by_oid(), get_database_oid(), get_db_info(), get_domain_constraint_oid(), get_extension_name(), get_extension_oid(), get_extension_schema(), get_index_constraint(), get_index_ref_constraints(), get_partition_parent_worker(), get_pkey_attnames(), get_primary_key_attnos(), get_relation_constraint_attnos(), get_relation_constraint_oid(), get_relation_idx_constraint_oid(), get_relation_policy_oid(), get_rels_with_domain(), get_trigger_oid(), GetAllTablesPublications(), GetAttrDefaultColumnAddress(), GetAttrDefaultOid(), getAutoExtensionsOfObject(), GetComment(), GetDatabaseTuple(), GetDatabaseTupleByOid(), GetDefaultOpClass(), getExtensionOfObject(), GetForeignKeyActionTriggers(), GetForeignKeyCheckTriggers(), GetNewOidWithIndex(), getObjectDescription(), getObjectIdentityParts(), getOwnedSequences_internal(), GetParentedForeignKeyRefs(), GetPublicationRelations(), GetPublicationSchemas(), GetSecurityLabel(), GetSharedSecurityLabel(), GetSubscriptionRelations(), has_superclass(), HasSubscriptionRelations(), heap_truncate_find_FKs(), index_concurrently_swap(), IndexSetParentIndex(), is_schema_publication(), LargeObjectDrop(), LargeObjectExists(), load_domaintype_info(), load_enum_cache_data(), LookupOpclassInfo(), makeConfigurationDependencies(), MakeConfigurationMapping(), MarkInheritDetached(), MergeConstraintsIntoExisting(), MergeWithExistingConstraint(), movedb(), myLargeObjectExists(), object_ownercheck(), PartitionHasPendingDetach(), pg_extension_config_dump(), pg_get_constraintdef_worker(), pg_get_serial_sequence(), pg_get_triggerdef_worker(), pg_largeobject_aclmask_snapshot(), RangeDelete(), recordExtensionInitPrivWorker(), recordExtObjInitPriv(), relation_has_policies(), RelationBuildPartitionDesc(), RelationBuildRowSecurity(), RelationBuildRuleLock(), RelationBuildTriggers(), RelationBuildTupleDesc(), RelationGetExclusionInfo(), RelationGetFKeyList(), RelationGetIndexList(), RelationGetStatExtList(), RelationRemoveInheritance(), RelidByRelfilenumber(), RemoveAttrDefault(), RemoveAttrDefaultById(), RemoveExtensionById(), RemoveInheritance(), RemovePolicyById(), RemoveRewriteRuleById(), RemoveRoleFromObjectACL(), RemoveRoleFromObjectPolicy(), RemoveStatistics(), RemoveTriggerById(), RemoveTSConfigurationById(), rename_policy(), renametrig(), renametrig_internal(), renametrig_partition(), replorigin_create(), ScanPgRelation(), SearchCatCacheList(), SearchCatCacheMiss(), sepgsql_attribute_post_create(), sepgsql_database_post_create(), sepgsql_proc_post_create(), sepgsql_proc_setattr(), sepgsql_relation_post_create(), sepgsql_relation_setattr(), sepgsql_relation_setattr_extra(), sepgsql_schema_post_create(), sequenceIsOwned(), SetSecurityLabel(), SetSharedSecurityLabel(), shdepChangeDep(), shdepDropDependency(), shdepDropOwned(), shdepReassignOwned(), toastrel_valueid_exists(), TriggerSetParentTrigger(), tryAttachPartitionForeignKey(), typeInheritsFrom(), vac_update_datfrozenxid(), and validatePartitionedIndex().

◆ systable_getnext_ordered()

HeapTuple systable_getnext_ordered ( SysScanDesc  sysscan,
ScanDirection  direction 
)

Definition at line 711 of file genam.c.

712 {
713  HeapTuple htup = NULL;
714 
715  Assert(sysscan->irel);
716  if (index_getnext_slot(sysscan->iscan, direction, sysscan->slot))
717  htup = ExecFetchSlotHeapTuple(sysscan->slot, false, NULL);
718 
719  /* See notes in systable_getnext */
720  if (htup && sysscan->iscan->xs_recheck)
721  elog(ERROR, "system catalog scans with lossy index conditions are not implemented");
722 
723  /*
724  * Handle the concurrent abort while fetching the catalog tuple during
725  * logical streaming of a transaction.
726  */
728 
729  return htup;
730 }

References Assert(), elog(), ERROR, ExecFetchSlotHeapTuple(), HandleConcurrentAbort(), index_getnext_slot(), SysScanDescData::irel, SysScanDescData::iscan, SysScanDescData::slot, and IndexScanDescData::xs_recheck.

Referenced by BuildEventTriggerCache(), check_toasted_attribute(), enum_endpoint(), enum_range_internal(), heap_fetch_toast_slice(), inv_getsize(), inv_read(), inv_truncate(), inv_write(), lookup_ts_config_cache(), and toast_delete_datum().

◆ systable_recheck_tuple()

bool systable_recheck_tuple ( SysScanDesc  sysscan,
HeapTuple  tup 
)

Definition at line 565 of file genam.c.

566 {
567  Snapshot freshsnap;
568  bool result;
569 
570  Assert(tup == ExecFetchSlotHeapTuple(sysscan->slot, false, NULL));
571 
572  /*
573  * Trust that table_tuple_satisfies_snapshot() and its subsidiaries
574  * (commonly LockBuffer() and HeapTupleSatisfiesMVCC()) do not themselves
575  * acquire snapshots, so we need not register the snapshot. Those
576  * facilities are too low-level to have any business scanning tables.
577  */
578  freshsnap = GetCatalogSnapshot(RelationGetRelid(sysscan->heap_rel));
579 
580  result = table_tuple_satisfies_snapshot(sysscan->heap_rel,
581  sysscan->slot,
582  freshsnap);
583 
584  /*
585  * Handle the concurrent abort while fetching the catalog tuple during
586  * logical streaming of a transaction.
587  */
589 
590  return result;
591 }
static bool table_tuple_satisfies_snapshot(Relation rel, TupleTableSlot *slot, Snapshot snapshot)
Definition: tableam.h:1306

References Assert(), ExecFetchSlotHeapTuple(), GetCatalogSnapshot(), HandleConcurrentAbort(), SysScanDescData::heap_rel, RelationGetRelid, SysScanDescData::slot, and table_tuple_satisfies_snapshot().

Referenced by findDependentObjects(), and shdepDropOwned().