PostgreSQL Source Code  git master
genam.h File Reference
#include "access/sdir.h"
#include "access/skey.h"
#include "nodes/tidbitmap.h"
#include "storage/lockdefs.h"
#include "utils/relcache.h"
#include "utils/snapshot.h"
Include dependency graph for genam.h:
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Data Structures

struct  IndexBuildResult
 
struct  IndexVacuumInfo
 
struct  IndexBulkDeleteResult
 
struct  IndexOrderByDistance
 

Macros

#define IndexScanIsValid(scan)   PointerIsValid(scan)
 

Typedefs

typedef struct IndexBuildResult IndexBuildResult
 
typedef struct IndexVacuumInfo IndexVacuumInfo
 
typedef struct IndexBulkDeleteResult IndexBulkDeleteResult
 
typedef bool(* IndexBulkDeleteCallback) (ItemPointer itemptr, void *state)
 
typedef struct IndexScanDescDataIndexScanDesc
 
typedef struct SysScanDescDataSysScanDesc
 
typedef struct ParallelIndexScanDescDataParallelIndexScanDesc
 
typedef enum IndexUniqueCheck IndexUniqueCheck
 
typedef struct IndexOrderByDistance IndexOrderByDistance
 

Enumerations

enum  IndexUniqueCheck { UNIQUE_CHECK_NO, UNIQUE_CHECK_YES, UNIQUE_CHECK_PARTIAL, UNIQUE_CHECK_EXISTING }
 

Functions

Relation index_open (Oid relationId, LOCKMODE lockmode)
 
void index_close (Relation relation, LOCKMODE lockmode)
 
bool index_insert (Relation indexRelation, Datum *values, bool *isnull, ItemPointer heap_t_ctid, Relation heapRelation, IndexUniqueCheck checkUnique, struct IndexInfo *indexInfo)
 
IndexScanDesc index_beginscan (Relation heapRelation, Relation indexRelation, Snapshot snapshot, int nkeys, int norderbys)
 
IndexScanDesc index_beginscan_bitmap (Relation indexRelation, Snapshot snapshot, int nkeys)
 
void index_rescan (IndexScanDesc scan, ScanKey keys, int nkeys, ScanKey orderbys, int norderbys)
 
void index_endscan (IndexScanDesc scan)
 
void index_markpos (IndexScanDesc scan)
 
void index_restrpos (IndexScanDesc scan)
 
Size index_parallelscan_estimate (Relation indexrel, Snapshot snapshot)
 
void index_parallelscan_initialize (Relation heaprel, Relation indexrel, Snapshot snapshot, ParallelIndexScanDesc target)
 
void index_parallelrescan (IndexScanDesc scan)
 
IndexScanDesc index_beginscan_parallel (Relation heaprel, Relation indexrel, int nkeys, int norderbys, ParallelIndexScanDesc pscan)
 
ItemPointer index_getnext_tid (IndexScanDesc scan, ScanDirection direction)
 
bool index_fetch_heap (IndexScanDesc scan, struct TupleTableSlot *slot)
 
bool index_getnext_slot (IndexScanDesc scan, ScanDirection direction, struct TupleTableSlot *slot)
 
int64 index_getbitmap (IndexScanDesc scan, TIDBitmap *bitmap)
 
IndexBulkDeleteResultindex_bulk_delete (IndexVacuumInfo *info, IndexBulkDeleteResult *stats, IndexBulkDeleteCallback callback, void *callback_state)
 
IndexBulkDeleteResultindex_vacuum_cleanup (IndexVacuumInfo *info, IndexBulkDeleteResult *stats)
 
bool index_can_return (Relation indexRelation, int attno)
 
RegProcedure index_getprocid (Relation irel, AttrNumber attnum, uint16 procnum)
 
FmgrInfoindex_getprocinfo (Relation irel, AttrNumber attnum, uint16 procnum)
 
void index_store_float8_orderby_distances (IndexScanDesc scan, Oid *orderByTypes, IndexOrderByDistance *distances, bool recheckOrderBy)
 
byteaindex_opclass_options (Relation relation, AttrNumber attnum, Datum attoptions, bool validate)
 
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)
 
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)
 

Macro Definition Documentation

◆ IndexScanIsValid

#define IndexScanIsValid (   scan)    PointerIsValid(scan)

Definition at line 136 of file genam.h.

Typedef Documentation

◆ IndexBuildResult

◆ IndexBulkDeleteCallback

typedef bool(* IndexBulkDeleteCallback) (ItemPointer itemptr, void *state)

Definition at line 84 of file genam.h.

◆ IndexBulkDeleteResult

◆ IndexOrderByDistance

◆ IndexScanDesc

Definition at line 87 of file genam.h.

◆ IndexUniqueCheck

◆ IndexVacuumInfo

◆ ParallelIndexScanDesc

Definition at line 90 of file genam.h.

◆ SysScanDesc

typedef struct SysScanDescData* SysScanDesc

Definition at line 88 of file genam.h.

Enumeration Type Documentation

◆ IndexUniqueCheck

Enumerator
UNIQUE_CHECK_NO 
UNIQUE_CHECK_YES 
UNIQUE_CHECK_PARTIAL 
UNIQUE_CHECK_EXISTING 

Definition at line 112 of file genam.h.

113 {
114  UNIQUE_CHECK_NO, /* Don't do any uniqueness checking */
115  UNIQUE_CHECK_YES, /* Enforce uniqueness at insertion time */
116  UNIQUE_CHECK_PARTIAL, /* Test uniqueness, but no error */
117  UNIQUE_CHECK_EXISTING /* Check if existing tuple is unique */
IndexUniqueCheck
Definition: genam.h:112

Function Documentation

◆ BuildIndexValueDescription()

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

Definition at line 177 of file genam.c.

References ACL_SELECT, ACLCHECK_OK, appendStringInfo(), appendStringInfoChar(), appendStringInfoString(), Assert, attnum, buf, check_enable_rls(), StringInfoData::data, 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, and val.

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

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 ||
228  pg_attribute_aclcheck(indrelid, attnum, GetUserId(),
230  {
231  /* No access, so clean up and return */
232  return NULL;
233  }
234  }
235  }
236 
237  initStringInfo(&buf);
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, ", ");
269  appendStringInfoString(&buf, val);
270  }
271 
272  appendStringInfoChar(&buf, ')');
273 
274  return buf.data;
275 }
void getTypeOutputInfo(Oid type, Oid *typOutput, bool *typIsVarlena)
Definition: lsyscache.c:2784
AclResult pg_attribute_aclcheck(Oid table_oid, AttrNumber attnum, Oid roleid, AclMode mode)
Definition: aclchk.c:4449
Oid GetUserId(void)
Definition: miscinit.c:450
char * pg_get_indexdef_columns(Oid indexrelid, bool pretty)
Definition: ruleutils.c:1169
unsigned int Oid
Definition: postgres_ext.h:31
Form_pg_index rd_index
Definition: rel.h:174
void appendStringInfo(StringInfo str, const char *fmt,...)
Definition: stringinfo.c:91
void appendStringInfoString(StringInfo str, const char *s)
Definition: stringinfo.c:176
static char * buf
Definition: pg_test_fsync.c:67
#define IndexRelationGetNumberOfKeyAttributes(relation)
Definition: rel.h:475
void appendStringInfoChar(StringInfo str, char ch)
Definition: stringinfo.c:188
void initStringInfo(StringInfo str)
Definition: stringinfo.c:59
FormData_pg_index * Form_pg_index
Definition: pg_index.h:68
AclResult
Definition: acl.h:177
#define ACL_SELECT
Definition: parsenodes.h:75
#define InvalidOid
Definition: postgres_ext.h:36
int16 attnum
Definition: pg_attribute.h:79
int check_enable_rls(Oid relid, Oid checkAsUser, bool noError)
Definition: rls.c:52
#define Assert(condition)
Definition: c.h:745
#define InvalidAttrNumber
Definition: attnum.h:23
AclResult pg_class_aclcheck(Oid table_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:4563
static Datum values[MAXATTR]
Definition: bootstrap.c:167
char * OidOutputFunctionCall(Oid functionId, Datum val)
Definition: fmgr.c:1657
int i
Oid * rd_opcintype
Definition: rel.h:190
int16 AttrNumber
Definition: attnum.h:21
#define RelationGetRelid(relation)
Definition: rel.h:456
long val
Definition: informix.c:664

◆ index_beginscan()

IndexScanDesc index_beginscan ( Relation  heapRelation,
Relation  indexRelation,
Snapshot  snapshot,
int  nkeys,
int  norderbys 
)

Definition at line 203 of file indexam.c.

References IndexScanDescData::heapRelation, index_beginscan_internal(), table_index_fetch_begin(), IndexScanDescData::xs_heapfetch, and IndexScanDescData::xs_snapshot.

Referenced by check_exclusion_or_unique_constraint(), get_actual_variable_endpoint(), heapam_relation_copy_for_cluster(), IndexNext(), IndexNextWithReorder(), IndexOnlyNext(), RelationFindReplTupleByIndex(), systable_beginscan(), and systable_beginscan_ordered().

207 {
208  IndexScanDesc scan;
209 
210  scan = index_beginscan_internal(indexRelation, nkeys, norderbys, snapshot, NULL, false);
211 
212  /*
213  * Save additional parameters into the scandesc. Everything else was set
214  * up by RelationGetIndexScan.
215  */
216  scan->heapRelation = heapRelation;
217  scan->xs_snapshot = snapshot;
218 
219  /* prepare to fetch index matches from table */
220  scan->xs_heapfetch = table_index_fetch_begin(heapRelation);
221 
222  return scan;
223 }
static IndexFetchTableData * table_index_fetch_begin(Relation rel)
Definition: tableam.h:975
struct SnapshotData * xs_snapshot
Definition: relscan.h:116
Relation heapRelation
Definition: relscan.h:114
static IndexScanDesc index_beginscan_internal(Relation indexRelation, int nkeys, int norderbys, Snapshot snapshot, ParallelIndexScanDesc pscan, bool temp_snap)
Definition: indexam.c:253
IndexFetchTableData * xs_heapfetch
Definition: relscan.h:147

◆ index_beginscan_bitmap()

IndexScanDesc index_beginscan_bitmap ( Relation  indexRelation,
Snapshot  snapshot,
int  nkeys 
)

Definition at line 232 of file indexam.c.

References index_beginscan_internal(), and IndexScanDescData::xs_snapshot.

Referenced by ExecInitBitmapIndexScan().

235 {
236  IndexScanDesc scan;
237 
238  scan = index_beginscan_internal(indexRelation, nkeys, 0, snapshot, NULL, false);
239 
240  /*
241  * Save additional parameters into the scandesc. Everything else was set
242  * up by RelationGetIndexScan.
243  */
244  scan->xs_snapshot = snapshot;
245 
246  return scan;
247 }
struct SnapshotData * xs_snapshot
Definition: relscan.h:116
static IndexScanDesc index_beginscan_internal(Relation indexRelation, int nkeys, int norderbys, Snapshot snapshot, ParallelIndexScanDesc pscan, bool temp_snap)
Definition: indexam.c:253

◆ index_beginscan_parallel()

IndexScanDesc index_beginscan_parallel ( Relation  heaprel,
Relation  indexrel,
int  nkeys,
int  norderbys,
ParallelIndexScanDesc  pscan 
)

Definition at line 482 of file indexam.c.

References Assert, IndexScanDescData::heapRelation, index_beginscan_internal(), ParallelIndexScanDescData::ps_relid, ParallelIndexScanDescData::ps_snapshot_data, RegisterSnapshot(), RelationGetRelid, RestoreSnapshot(), table_index_fetch_begin(), IndexScanDescData::xs_heapfetch, and IndexScanDescData::xs_snapshot.

Referenced by ExecIndexOnlyScanInitializeDSM(), ExecIndexOnlyScanInitializeWorker(), ExecIndexScanInitializeDSM(), and ExecIndexScanInitializeWorker().

484 {
485  Snapshot snapshot;
486  IndexScanDesc scan;
487 
488  Assert(RelationGetRelid(heaprel) == pscan->ps_relid);
489  snapshot = RestoreSnapshot(pscan->ps_snapshot_data);
490  RegisterSnapshot(snapshot);
491  scan = index_beginscan_internal(indexrel, nkeys, norderbys, snapshot,
492  pscan, true);
493 
494  /*
495  * Save additional parameters into the scandesc. Everything else was set
496  * up by index_beginscan_internal.
497  */
498  scan->heapRelation = heaprel;
499  scan->xs_snapshot = snapshot;
500 
501  /* prepare to fetch index matches from table */
502  scan->xs_heapfetch = table_index_fetch_begin(heaprel);
503 
504  return scan;
505 }
Snapshot RestoreSnapshot(char *start_address)
Definition: snapmgr.c:2161
Snapshot RegisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:865
static IndexFetchTableData * table_index_fetch_begin(Relation rel)
Definition: tableam.h:975
struct SnapshotData * xs_snapshot
Definition: relscan.h:116
char ps_snapshot_data[FLEXIBLE_ARRAY_MEMBER]
Definition: relscan.h:172
Relation heapRelation
Definition: relscan.h:114
static IndexScanDesc index_beginscan_internal(Relation indexRelation, int nkeys, int norderbys, Snapshot snapshot, ParallelIndexScanDesc pscan, bool temp_snap)
Definition: indexam.c:253
#define Assert(condition)
Definition: c.h:745
IndexFetchTableData * xs_heapfetch
Definition: relscan.h:147
#define RelationGetRelid(relation)
Definition: rel.h:456

◆ index_bulk_delete()

IndexBulkDeleteResult* index_bulk_delete ( IndexVacuumInfo info,
IndexBulkDeleteResult stats,
IndexBulkDeleteCallback  callback,
void *  callback_state 
)

Definition at line 688 of file indexam.c.

References IndexAmRoutine::ambulkdelete, CHECK_REL_PROCEDURE, IndexVacuumInfo::index, RelationData::rd_indam, and RELATION_CHECKS.

Referenced by lazy_vacuum_index(), and validate_index().

692 {
693  Relation indexRelation = info->index;
694 
696  CHECK_REL_PROCEDURE(ambulkdelete);
697 
698  return indexRelation->rd_indam->ambulkdelete(info, stats,
699  callback, callback_state);
700 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
ambulkdelete_function ambulkdelete
Definition: amapi.h:261
#define RELATION_CHECKS
Definition: indexam.c:79
Relation index
Definition: genam.h:46
#define CHECK_REL_PROCEDURE(pname)
Definition: indexam.c:93
static void callback(struct sockaddr *addr, struct sockaddr *mask, void *unused)
Definition: test_ifaddrs.c:48

◆ index_can_return()

bool index_can_return ( Relation  indexRelation,
int  attno 
)

Definition at line 728 of file indexam.c.

References IndexAmRoutine::amcanreturn, RelationData::rd_indam, and RELATION_CHECKS.

Referenced by get_relation_info(), and indexam_property().

729 {
731 
732  /* amcanreturn is optional; assume false if not provided by AM */
733  if (indexRelation->rd_indam->amcanreturn == NULL)
734  return false;
735 
736  return indexRelation->rd_indam->amcanreturn(indexRelation, attno);
737 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
#define RELATION_CHECKS
Definition: indexam.c:79
amcanreturn_function amcanreturn
Definition: amapi.h:263

◆ index_close()

void index_close ( Relation  relation,
LOCKMODE  lockmode 
)

Definition at line 158 of file indexam.c.

References Assert, LockInfoData::lockRelId, MAX_LOCKMODES, NoLock, RelationData::rd_lockInfo, RelationClose(), and UnlockRelationId().

Referenced by _bt_parallel_build_main(), ATExecAddIndex(), ATExecAddIndexConstraint(), ATExecDetachPartition(), ATExecReplicaIdentity(), ATExecSetStorage(), AttachPartitionEnsureIndexes(), brin_page_items(), brincostestimate(), bt_index_check_internal(), build_indices(), BuildEventTriggerCache(), check_index_is_clusterable(), CheckIndexCompatible(), close_lo_relation(), copy_table_data(), DefineIndex(), DefineRelation(), enum_endpoint(), enum_range_internal(), ExecCloseIndices(), ExecEndBitmapIndexScan(), ExecEndIndexOnlyScan(), ExecEndIndexScan(), ExecRefreshMatView(), get_actual_variable_range(), get_relation_info(), gin_clean_pending_list(), gincostestimate(), hash_bitmap_info(), index_concurrently_build(), index_concurrently_create_copy(), index_concurrently_set_dead(), index_create(), index_drop(), indexam_property(), infer_arbiter_indexes(), InitCatCachePhase2(), lookup_ts_config_cache(), pg_nextoid(), pgstathashindex(), plan_create_index_workers(), refresh_by_match_merge(), reindex_index(), ReindexIndex(), ReindexRelationConcurrently(), RelationFindReplTupleByIndex(), RelationGetIndexAttrBitmap(), RelationTruncateIndexes(), systable_endscan(), toast_close_indexes(), transformTableLikeClause(), TryReuseIndex(), unique_key_recheck(), vac_close_indexes(), vac_open_indexes(), and validate_index().

159 {
160  LockRelId relid = relation->rd_lockInfo.lockRelId;
161 
162  Assert(lockmode >= NoLock && lockmode < MAX_LOCKMODES);
163 
164  /* The relcache does the real work... */
165  RelationClose(relation);
166 
167  if (lockmode != NoLock)
168  UnlockRelationId(&relid, lockmode);
169 }
LockRelId lockRelId
Definition: rel.h:44
void UnlockRelationId(LockRelId *relid, LOCKMODE lockmode)
Definition: lmgr.c:184
Definition: rel.h:36
#define NoLock
Definition: lockdefs.h:34
LockInfoData rd_lockInfo
Definition: rel.h:112
void RelationClose(Relation relation)
Definition: relcache.c:2103
#define MAX_LOCKMODES
Definition: lock.h:84
#define Assert(condition)
Definition: c.h:745

◆ 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 286 of file genam.c.

References BufferGetPage, i, InvalidTransactionId, ItemPointerCopy, PageGetItem, PageGetItemId, palloc(), pfree(), IndexTupleData::t_tid, and table_compute_xid_horizon_for_tuples().

Referenced by _hash_vacuum_one_page(), and gistprunepage().

291 {
292  ItemPointerData *ttids =
293  (ItemPointerData *) palloc(sizeof(ItemPointerData) * nitems);
294  TransactionId latestRemovedXid = InvalidTransactionId;
295  Page ipage = BufferGetPage(ibuf);
296  IndexTuple itup;
297 
298  /* identify what the index tuples about to be deleted point to */
299  for (int i = 0; i < nitems; i++)
300  {
301  ItemId iitemid;
302 
303  iitemid = PageGetItemId(ipage, itemnos[i]);
304  itup = (IndexTuple) PageGetItem(ipage, iitemid);
305 
306  ItemPointerCopy(&itup->t_tid, &ttids[i]);
307  }
308 
309  /* determine the actual xid horizon */
310  latestRemovedXid =
311  table_compute_xid_horizon_for_tuples(hrel, ttids, nitems);
312 
313  pfree(ttids);
314 
315  return latestRemovedXid;
316 }
uint32 TransactionId
Definition: c.h:520
ItemPointerData t_tid
Definition: itup.h:37
static TransactionId table_compute_xid_horizon_for_tuples(Relation rel, ItemPointerData *items, int nitems)
Definition: tableam.h:1130
void pfree(void *pointer)
Definition: mcxt.c:1056
IndexTupleData * IndexTuple
Definition: itup.h:53
#define InvalidTransactionId
Definition: transam.h:31
#define BufferGetPage(buffer)
Definition: bufmgr.h:169
#define PageGetItemId(page, offsetNumber)
Definition: bufpage.h:235
void * palloc(Size size)
Definition: mcxt.c:949
int i
#define PageGetItem(page, itemId)
Definition: bufpage.h:340
Pointer Page
Definition: bufpage.h:78
#define ItemPointerCopy(fromPointer, toPointer)
Definition: itemptr.h:161

◆ index_endscan()

void index_endscan ( IndexScanDesc  scan)

Definition at line 321 of file indexam.c.

References IndexAmRoutine::amendscan, CHECK_SCAN_PROCEDURE, IndexScanDescData::indexRelation, IndexScanEnd(), RelationData::rd_indam, RelationDecrementReferenceCount(), SCAN_CHECKS, table_index_fetch_end(), UnregisterSnapshot(), IndexScanDescData::xs_heapfetch, IndexScanDescData::xs_snapshot, and IndexScanDescData::xs_temp_snap.

Referenced by check_exclusion_or_unique_constraint(), ExecEndBitmapIndexScan(), ExecEndIndexOnlyScan(), ExecEndIndexScan(), get_actual_variable_endpoint(), heapam_relation_copy_for_cluster(), RelationFindReplTupleByIndex(), systable_endscan(), and systable_endscan_ordered().

322 {
323  SCAN_CHECKS;
324  CHECK_SCAN_PROCEDURE(amendscan);
325 
326  /* Release resources (like buffer pins) from table accesses */
327  if (scan->xs_heapfetch)
328  {
330  scan->xs_heapfetch = NULL;
331  }
332 
333  /* End the AM's scan */
334  scan->indexRelation->rd_indam->amendscan(scan);
335 
336  /* Release index refcount acquired by index_beginscan */
338 
339  if (scan->xs_temp_snap)
341 
342  /* Release the scan data structure itself */
343  IndexScanEnd(scan);
344 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
struct SnapshotData * xs_snapshot
Definition: relscan.h:116
#define CHECK_SCAN_PROCEDURE(pname)
Definition: indexam.c:100
Relation indexRelation
Definition: relscan.h:115
void RelationDecrementReferenceCount(Relation rel)
Definition: relcache.c:2083
amendscan_function amendscan
Definition: amapi.h:274
void IndexScanEnd(IndexScanDesc scan)
Definition: genam.c:145
void UnregisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:907
IndexFetchTableData * xs_heapfetch
Definition: relscan.h:147
#define SCAN_CHECKS
Definition: indexam.c:86
static void table_index_fetch_end(struct IndexFetchTableData *scan)
Definition: tableam.h:994

◆ index_fetch_heap()

bool index_fetch_heap ( IndexScanDesc  scan,
struct TupleTableSlot slot 
)

Definition at line 572 of file indexam.c.

References IndexScanDescData::indexRelation, IndexScanDescData::kill_prior_tuple, pgstat_count_heap_fetch, table_index_fetch_tuple(), IndexScanDescData::xactStartedInRecovery, IndexScanDescData::xs_heap_continue, IndexScanDescData::xs_heapfetch, IndexScanDescData::xs_heaptid, and IndexScanDescData::xs_snapshot.

Referenced by get_actual_variable_endpoint(), index_getnext_slot(), and IndexOnlyNext().

573 {
574  bool all_dead = false;
575  bool found;
576 
577  found = table_index_fetch_tuple(scan->xs_heapfetch, &scan->xs_heaptid,
578  scan->xs_snapshot, slot,
579  &scan->xs_heap_continue, &all_dead);
580 
581  if (found)
583 
584  /*
585  * If we scanned a whole HOT chain and found only dead tuples, tell index
586  * AM to kill its entry for that TID (this will take effect in the next
587  * amgettuple call, in index_getnext_tid). We do not do this when in
588  * recovery because it may violate MVCC to do so. See comments in
589  * RelationGetIndexScan().
590  */
591  if (!scan->xactStartedInRecovery)
592  scan->kill_prior_tuple = all_dead;
593 
594  return found;
595 }
struct SnapshotData * xs_snapshot
Definition: relscan.h:116
Relation indexRelation
Definition: relscan.h:115
#define pgstat_count_heap_fetch(rel)
Definition: pgstat.h:1407
ItemPointerData xs_heaptid
Definition: relscan.h:144
bool xactStartedInRecovery
Definition: relscan.h:127
static bool table_index_fetch_tuple(struct IndexFetchTableData *scan, ItemPointer tid, Snapshot snapshot, TupleTableSlot *slot, bool *call_again, bool *all_dead)
Definition: tableam.h:1024
IndexFetchTableData * xs_heapfetch
Definition: relscan.h:147
bool xs_heap_continue
Definition: relscan.h:145
bool kill_prior_tuple
Definition: relscan.h:125

◆ index_getbitmap()

int64 index_getbitmap ( IndexScanDesc  scan,
TIDBitmap bitmap 
)

Definition at line 658 of file indexam.c.

References IndexAmRoutine::amgetbitmap, CHECK_SCAN_PROCEDURE, IndexScanDescData::indexRelation, IndexScanDescData::kill_prior_tuple, pgstat_count_index_tuples, RelationData::rd_indam, and SCAN_CHECKS.

Referenced by MultiExecBitmapIndexScan().

659 {
660  int64 ntids;
661 
662  SCAN_CHECKS;
663  CHECK_SCAN_PROCEDURE(amgetbitmap);
664 
665  /* just make sure this is false... */
666  scan->kill_prior_tuple = false;
667 
668  /*
669  * have the am's getbitmap proc do all the work.
670  */
671  ntids = scan->indexRelation->rd_indam->amgetbitmap(scan, bitmap);
672 
674 
675  return ntids;
676 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
#define CHECK_SCAN_PROCEDURE(pname)
Definition: indexam.c:100
Relation indexRelation
Definition: relscan.h:115
amgetbitmap_function amgetbitmap
Definition: amapi.h:273
#define SCAN_CHECKS
Definition: indexam.c:86
#define pgstat_count_index_tuples(rel, n)
Definition: pgstat.h:1417
bool kill_prior_tuple
Definition: relscan.h:125

◆ index_getnext_slot()

bool index_getnext_slot ( IndexScanDesc  scan,
ScanDirection  direction,
struct TupleTableSlot slot 
)

Definition at line 613 of file indexam.c.

References Assert, index_fetch_heap(), index_getnext_tid(), ItemPointerEquals(), ItemPointerIsValid, IndexScanDescData::xs_heap_continue, and IndexScanDescData::xs_heaptid.

Referenced by check_exclusion_or_unique_constraint(), heapam_relation_copy_for_cluster(), IndexNext(), IndexNextWithReorder(), RelationFindReplTupleByIndex(), systable_getnext(), and systable_getnext_ordered().

614 {
615  for (;;)
616  {
617  if (!scan->xs_heap_continue)
618  {
619  ItemPointer tid;
620 
621  /* Time to fetch the next TID from the index */
622  tid = index_getnext_tid(scan, direction);
623 
624  /* If we're out of index entries, we're done */
625  if (tid == NULL)
626  break;
627 
628  Assert(ItemPointerEquals(tid, &scan->xs_heaptid));
629  }
630 
631  /*
632  * Fetch the next (or only) visible heap tuple for this index entry.
633  * If we don't find anything, loop around and grab the next TID from
634  * the index.
635  */
637  if (index_fetch_heap(scan, slot))
638  return true;
639  }
640 
641  return false;
642 }
#define ItemPointerIsValid(pointer)
Definition: itemptr.h:82
ItemPointer index_getnext_tid(IndexScanDesc scan, ScanDirection direction)
Definition: indexam.c:515
ItemPointerData xs_heaptid
Definition: relscan.h:144
#define Assert(condition)
Definition: c.h:745
bool xs_heap_continue
Definition: relscan.h:145
bool ItemPointerEquals(ItemPointer pointer1, ItemPointer pointer2)
Definition: itemptr.c:29
bool index_fetch_heap(IndexScanDesc scan, TupleTableSlot *slot)
Definition: indexam.c:572

◆ index_getnext_tid()

ItemPointer index_getnext_tid ( IndexScanDesc  scan,
ScanDirection  direction 
)

Definition at line 515 of file indexam.c.

References IndexAmRoutine::amgettuple, Assert, CHECK_SCAN_PROCEDURE, IndexScanDescData::indexRelation, ItemPointerIsValid, IndexScanDescData::kill_prior_tuple, pgstat_count_index_tuples, RelationData::rd_indam, RecentGlobalXmin, SCAN_CHECKS, table_index_fetch_reset(), TransactionIdIsValid, IndexScanDescData::xs_heap_continue, IndexScanDescData::xs_heapfetch, and IndexScanDescData::xs_heaptid.

Referenced by get_actual_variable_endpoint(), index_getnext_slot(), and IndexOnlyNext().

516 {
517  bool found;
518 
519  SCAN_CHECKS;
520  CHECK_SCAN_PROCEDURE(amgettuple);
521 
523 
524  /*
525  * The AM's amgettuple proc finds the next index entry matching the scan
526  * keys, and puts the TID into scan->xs_heaptid. It should also set
527  * scan->xs_recheck and possibly scan->xs_itup/scan->xs_hitup, though we
528  * pay no attention to those fields here.
529  */
530  found = scan->indexRelation->rd_indam->amgettuple(scan, direction);
531 
532  /* Reset kill flag immediately for safety */
533  scan->kill_prior_tuple = false;
534  scan->xs_heap_continue = false;
535 
536  /* If we're out of index entries, we're done */
537  if (!found)
538  {
539  /* release resources (like buffer pins) from table accesses */
540  if (scan->xs_heapfetch)
542 
543  return NULL;
544  }
546 
548 
549  /* Return the TID of the tuple we found. */
550  return &scan->xs_heaptid;
551 }
#define ItemPointerIsValid(pointer)
Definition: itemptr.h:82
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
amgettuple_function amgettuple
Definition: amapi.h:272
#define CHECK_SCAN_PROCEDURE(pname)
Definition: indexam.c:100
Relation indexRelation
Definition: relscan.h:115
ItemPointerData xs_heaptid
Definition: relscan.h:144
TransactionId RecentGlobalXmin
Definition: snapmgr.c:168
static void table_index_fetch_reset(struct IndexFetchTableData *scan)
Definition: tableam.h:985
#define Assert(condition)
Definition: c.h:745
IndexFetchTableData * xs_heapfetch
Definition: relscan.h:147
#define SCAN_CHECKS
Definition: indexam.c:86
bool xs_heap_continue
Definition: relscan.h:145
#define pgstat_count_index_tuples(rel, n)
Definition: pgstat.h:1417
bool kill_prior_tuple
Definition: relscan.h:125
#define TransactionIdIsValid(xid)
Definition: transam.h:41

◆ index_getprocid()

RegProcedure index_getprocid ( Relation  irel,
AttrNumber  attnum,
uint16  procnum 
)

Definition at line 766 of file indexam.c.

References IndexAmRoutine::amsupport, Assert, RelationData::rd_indam, and RelationData::rd_support.

Referenced by _hash_init(), gistcanreturn(), inclusion_get_procinfo(), index_opclass_options(), initGinState(), initGISTstate(), RelationGetIndexRawAttOptions(), spgdoinsert(), and spgGetCache().

769 {
770  RegProcedure *loc;
771  int nproc;
772  int procindex;
773 
774  nproc = irel->rd_indam->amsupport;
775 
776  Assert(procnum > 0 && procnum <= (uint16) nproc);
777 
778  procindex = (nproc * (attnum - 1)) + (procnum - 1);
779 
780  loc = irel->rd_support;
781 
782  Assert(loc != NULL);
783 
784  return loc[procindex];
785 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
uint16 amsupport
Definition: amapi.h:215
regproc RegProcedure
Definition: c.h:518
unsigned short uint16
Definition: c.h:373
RegProcedure * rd_support
Definition: rel.h:191
int16 attnum
Definition: pg_attribute.h:79
#define Assert(condition)
Definition: c.h:745

◆ index_getprocinfo()

FmgrInfo* index_getprocinfo ( Relation  irel,
AttrNumber  attnum,
uint16  procnum 
)

Definition at line 800 of file indexam.c.

References IndexAmRoutine::amoptsprocnum, IndexAmRoutine::amsupport, Assert, elog, ERROR, fmgr_info_cxt(), FmgrInfo::fn_oid, InvalidOid, MemoryContextSwitchTo(), RelationData::rd_indam, RelationData::rd_indexcxt, RelationData::rd_support, RelationData::rd_supportinfo, RegProcedureIsValid, RelationGetIndexAttOptions(), RelationGetRelationName, and set_fn_opclass_options().

Referenced by _bt_first(), _bt_mkscankey(), _hash_datum2hashkey(), brin_build_desc(), brinbuildCallback(), bringetbitmap(), brininsert(), doPickSplit(), inclusion_get_procinfo(), index_opclass_options(), initBloomState(), initGinState(), initGISTstate(), spgbeginscan(), spgdoinsert(), spgGetCache(), and union_tuples().

803 {
804  FmgrInfo *locinfo;
805  int nproc;
806  int optsproc;
807  int procindex;
808 
809  nproc = irel->rd_indam->amsupport;
810  optsproc = irel->rd_indam->amoptsprocnum;
811 
812  Assert(procnum > 0 && procnum <= (uint16) nproc);
813 
814  procindex = (nproc * (attnum - 1)) + (procnum - 1);
815 
816  locinfo = irel->rd_supportinfo;
817 
818  Assert(locinfo != NULL);
819 
820  locinfo += procindex;
821 
822  /* Initialize the lookup info if first time through */
823  if (locinfo->fn_oid == InvalidOid)
824  {
825  RegProcedure *loc = irel->rd_support;
826  RegProcedure procId;
827 
828  Assert(loc != NULL);
829 
830  procId = loc[procindex];
831 
832  /*
833  * Complain if function was not found during IndexSupportInitialize.
834  * This should not happen unless the system tables contain bogus
835  * entries for the index opclass. (If an AM wants to allow a support
836  * function to be optional, it can use index_getprocid.)
837  */
838  if (!RegProcedureIsValid(procId))
839  elog(ERROR, "missing support function %d for attribute %d of index \"%s\"",
840  procnum, attnum, RelationGetRelationName(irel));
841 
842  fmgr_info_cxt(procId, locinfo, irel->rd_indexcxt);
843 
844  if (procnum != optsproc)
845  {
846  /* Initialize locinfo->fn_expr with opclass options Const */
847  bytea **attoptions = RelationGetIndexAttOptions(irel, false);
849 
850  set_fn_opclass_options(locinfo, attoptions[attnum - 1]);
851 
852  MemoryContextSwitchTo(oldcxt);
853  }
854  }
855 
856  return locinfo;
857 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
Definition: fmgr.h:56
uint16 amsupport
Definition: amapi.h:215
struct FmgrInfo * rd_supportinfo
Definition: rel.h:192
regproc RegProcedure
Definition: c.h:518
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
void set_fn_opclass_options(FmgrInfo *flinfo, bytea *options)
Definition: fmgr.c:1964
unsigned short uint16
Definition: c.h:373
#define ERROR
Definition: elog.h:43
#define RegProcedureIsValid(p)
Definition: c.h:653
#define RelationGetRelationName(relation)
Definition: rel.h:490
void fmgr_info_cxt(Oid functionId, FmgrInfo *finfo, MemoryContext mcxt)
Definition: fmgr.c:136
RegProcedure * rd_support
Definition: rel.h:191
#define InvalidOid
Definition: postgres_ext.h:36
int16 attnum
Definition: pg_attribute.h:79
Oid fn_oid
Definition: fmgr.h:59
#define Assert(condition)
Definition: c.h:745
uint16 amoptsprocnum
Definition: amapi.h:217
#define elog(elevel,...)
Definition: elog.h:214
MemoryContext rd_indexcxt
Definition: rel.h:186
Definition: c.h:562
bytea ** RelationGetIndexAttOptions(Relation relation, bool copy)
Definition: relcache.c:5429

◆ index_insert()

bool index_insert ( Relation  indexRelation,
Datum values,
bool isnull,
ItemPointer  heap_t_ctid,
Relation  heapRelation,
IndexUniqueCheck  checkUnique,
struct IndexInfo indexInfo 
)

Definition at line 176 of file indexam.c.

References IndexAmRoutine::aminsert, IndexAmRoutine::ampredlocks, CHECK_REL_PROCEDURE, CheckForSerializableConflictIn(), InvalidBlockNumber, RelationData::rd_indam, and RELATION_CHECKS.

Referenced by CatalogIndexInsert(), ExecInsertIndexTuples(), heapam_index_validate_scan(), toast_save_datum(), and unique_key_recheck().

183 {
185  CHECK_REL_PROCEDURE(aminsert);
186 
187  if (!(indexRelation->rd_indam->ampredlocks))
188  CheckForSerializableConflictIn(indexRelation,
189  (ItemPointer) NULL,
191 
192  return indexRelation->rd_indam->aminsert(indexRelation, values, isnull,
193  heap_t_ctid, heapRelation,
194  checkUnique, indexInfo);
195 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
#define RELATION_CHECKS
Definition: indexam.c:79
bool ampredlocks
Definition: amapi.h:239
aminsert_function aminsert
Definition: amapi.h:260
#define CHECK_REL_PROCEDURE(pname)
Definition: indexam.c:93
void CheckForSerializableConflictIn(Relation relation, ItemPointer tid, BlockNumber blkno)
Definition: predicate.c:4377
#define InvalidBlockNumber
Definition: block.h:33
static Datum values[MAXATTR]
Definition: bootstrap.c:167

◆ index_markpos()

void index_markpos ( IndexScanDesc  scan)

Definition at line 351 of file indexam.c.

References IndexAmRoutine::ammarkpos, CHECK_SCAN_PROCEDURE, IndexScanDescData::indexRelation, RelationData::rd_indam, and SCAN_CHECKS.

Referenced by ExecIndexMarkPos(), and ExecIndexOnlyMarkPos().

352 {
353  SCAN_CHECKS;
354  CHECK_SCAN_PROCEDURE(ammarkpos);
355 
356  scan->indexRelation->rd_indam->ammarkpos(scan);
357 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
#define CHECK_SCAN_PROCEDURE(pname)
Definition: indexam.c:100
Relation indexRelation
Definition: relscan.h:115
#define SCAN_CHECKS
Definition: indexam.c:86
ammarkpos_function ammarkpos
Definition: amapi.h:275

◆ index_opclass_options()

bytea* index_opclass_options ( Relation  relation,
AttrNumber  attnum,
Datum  attoptions,
bool  validate 
)

Definition at line 936 of file indexam.c.

References IndexAmRoutine::amoptsprocnum, Assert, build_local_reloptions(), DatumGetPointer, ereport, errcode(), errmsg(), ERROR, FunctionCall1, generate_opclass_name(), index_getprocid(), index_getprocinfo(), INDEXRELID, init_local_reloptions(), InvalidOid, OidIsValid, PointerGetDatum, RelationData::rd_indam, RelationData::rd_indextuple, SysCacheGetAttr(), and oidvector::values.

Referenced by index_create(), and RelationGetIndexAttOptions().

938 {
939  int amoptsprocnum = indrel->rd_indam->amoptsprocnum;
940  Oid procid = InvalidOid;
941  FmgrInfo *procinfo;
942  local_relopts relopts;
943 
944  /* fetch options support procedure if specified */
945  if (amoptsprocnum != 0)
946  procid = index_getprocid(indrel, attnum, amoptsprocnum);
947 
948  if (!OidIsValid(procid))
949  {
950  Oid opclass;
951  Datum indclassDatum;
952  oidvector *indclass;
953  bool isnull;
954 
955  if (!DatumGetPointer(attoptions))
956  return NULL; /* ok, no options, no procedure */
957 
958  /*
959  * Report an error if the opclass's options-parsing procedure does not
960  * exist but the opclass options are specified.
961  */
962  indclassDatum = SysCacheGetAttr(INDEXRELID, indrel->rd_indextuple,
963  Anum_pg_index_indclass, &isnull);
964  Assert(!isnull);
965  indclass = (oidvector *) DatumGetPointer(indclassDatum);
966  opclass = indclass->values[attnum - 1];
967 
968  ereport(ERROR,
969  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
970  errmsg("operator class %s has no options",
971  generate_opclass_name(opclass))));
972  }
973 
974  init_local_reloptions(&relopts, 0);
975 
976  procinfo = index_getprocinfo(indrel, attnum, amoptsprocnum);
977 
978  (void) FunctionCall1(procinfo, PointerGetDatum(&relopts));
979 
980  return build_local_reloptions(&relopts, attoptions, validate);
981 }
Definition: c.h:601
Definition: fmgr.h:56
void init_local_reloptions(local_relopts *opts, Size relopt_struct_size)
Definition: reloptions.c:710
FmgrInfo * index_getprocinfo(Relation irel, AttrNumber attnum, uint16 procnum)
Definition: indexam.c:800
#define PointerGetDatum(X)
Definition: postgres.h:556
void * build_local_reloptions(local_relopts *relopts, Datum options, bool validate)
Definition: reloptions.c:1924
int errcode(int sqlerrcode)
Definition: elog.c:610
unsigned int Oid
Definition: postgres_ext.h:31
#define OidIsValid(objectId)
Definition: c.h:651
#define ERROR
Definition: elog.h:43
Oid values[FLEXIBLE_ARRAY_MEMBER]
Definition: c.h:609
char * generate_opclass_name(Oid opclass)
Definition: ruleutils.c:10597
uintptr_t Datum
Definition: postgres.h:367
Datum SysCacheGetAttr(int cacheId, HeapTuple tup, AttrNumber attributeNumber, bool *isNull)
Definition: syscache.c:1377
#define InvalidOid
Definition: postgres_ext.h:36
int16 attnum
Definition: pg_attribute.h:79
#define ereport(elevel,...)
Definition: elog.h:144
#define Assert(condition)
Definition: c.h:745
#define DatumGetPointer(X)
Definition: postgres.h:549
int errmsg(const char *fmt,...)
Definition: elog.c:824
#define FunctionCall1(flinfo, arg1)
Definition: fmgr.h:642
RegProcedure index_getprocid(Relation irel, AttrNumber attnum, uint16 procnum)
Definition: indexam.c:766

◆ index_open()

Relation index_open ( Oid  relationId,
LOCKMODE  lockmode 
)

Definition at line 132 of file indexam.c.

References ereport, errcode(), errmsg(), ERROR, RelationData::rd_rel, relation_open(), and RelationGetRelationName.

Referenced by _bt_parallel_build_main(), ATExecAddIndex(), ATExecAddIndexConstraint(), ATExecDetachPartition(), ATExecReplicaIdentity(), ATExecSetStorage(), AttachPartitionEnsureIndexes(), brin_desummarize_range(), brin_page_items(), brin_summarize_range(), brincostestimate(), bt_index_check_internal(), build_indices(), BuildEventTriggerCache(), check_index_is_clusterable(), CheckIndexCompatible(), copy_table_data(), DefineIndex(), DefineRelation(), enum_endpoint(), enum_range_internal(), ExecInitBitmapIndexScan(), ExecInitIndexOnlyScan(), ExecInitIndexScan(), ExecOpenIndices(), ExecRefreshMatView(), get_actual_variable_range(), get_relation_info(), gin_clean_pending_list(), gincostestimate(), hash_bitmap_info(), index_concurrently_build(), index_concurrently_create_copy(), index_concurrently_set_dead(), index_drop(), indexam_property(), infer_arbiter_indexes(), InitCatCachePhase2(), lookup_ts_config_cache(), open_lo_relation(), pg_nextoid(), pgstathashindex(), plan_create_index_workers(), refresh_by_match_merge(), reindex_index(), ReindexIndex(), ReindexRelationConcurrently(), RelationFindReplTupleByIndex(), RelationGetIndexAttrBitmap(), RelationTruncateIndexes(), systable_beginscan(), toast_open_indexes(), transformIndexConstraint(), transformTableLikeClause(), TryReuseIndex(), unique_key_recheck(), vac_open_indexes(), and validate_index().

133 {
134  Relation r;
135 
136  r = relation_open(relationId, lockmode);
137 
138  if (r->rd_rel->relkind != RELKIND_INDEX &&
139  r->rd_rel->relkind != RELKIND_PARTITIONED_INDEX)
140  ereport(ERROR,
141  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
142  errmsg("\"%s\" is not an index",
144 
145  return r;
146 }
int errcode(int sqlerrcode)
Definition: elog.c:610
Form_pg_class rd_rel
Definition: rel.h:109
#define ERROR
Definition: elog.h:43
Relation relation_open(Oid relationId, LOCKMODE lockmode)
Definition: relation.c:48
#define RelationGetRelationName(relation)
Definition: rel.h:490
#define ereport(elevel,...)
Definition: elog.h:144
int errmsg(const char *fmt,...)
Definition: elog.c:824

◆ index_parallelrescan()

void index_parallelrescan ( IndexScanDesc  scan)

Definition at line 464 of file indexam.c.

References IndexAmRoutine::amparallelrescan, IndexScanDescData::indexRelation, RelationData::rd_indam, SCAN_CHECKS, table_index_fetch_reset(), and IndexScanDescData::xs_heapfetch.

Referenced by ExecIndexOnlyScanReInitializeDSM(), and ExecIndexScanReInitializeDSM().

465 {
466  SCAN_CHECKS;
467 
468  if (scan->xs_heapfetch)
470 
471  /* amparallelrescan is optional; assume no-op if not provided by AM */
472  if (scan->indexRelation->rd_indam->amparallelrescan != NULL)
474 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
amparallelrescan_function amparallelrescan
Definition: amapi.h:281
Relation indexRelation
Definition: relscan.h:115
static void table_index_fetch_reset(struct IndexFetchTableData *scan)
Definition: tableam.h:985
IndexFetchTableData * xs_heapfetch
Definition: relscan.h:147
#define SCAN_CHECKS
Definition: indexam.c:86

◆ index_parallelscan_estimate()

Size index_parallelscan_estimate ( Relation  indexrel,
Snapshot  snapshot 
)

Definition at line 400 of file indexam.c.

References add_size(), IndexAmRoutine::amestimateparallelscan, EstimateSnapshotSpace(), MAXALIGN, offsetof, RelationData::rd_indam, and RELATION_CHECKS.

Referenced by ExecIndexOnlyScanEstimate(), and ExecIndexScanEstimate().

401 {
402  Size nbytes;
403 
405 
406  nbytes = offsetof(ParallelIndexScanDescData, ps_snapshot_data);
407  nbytes = add_size(nbytes, EstimateSnapshotSpace(snapshot));
408  nbytes = MAXALIGN(nbytes);
409 
410  /*
411  * If amestimateparallelscan is not provided, assume there is no
412  * AM-specific data needed. (It's hard to believe that could work, but
413  * it's easy enough to cater to it here.)
414  */
415  if (indexRelation->rd_indam->amestimateparallelscan != NULL)
416  nbytes = add_size(nbytes,
417  indexRelation->rd_indam->amestimateparallelscan());
418 
419  return nbytes;
420 }
#define RELATION_CHECKS
Definition: indexam.c:79
Size EstimateSnapshotSpace(Snapshot snap)
Definition: snapmgr.c:2078
Size add_size(Size s1, Size s2)
Definition: shmem.c:498
size_t Size
Definition: c.h:473
#define MAXALIGN(LEN)
Definition: c.h:698
#define offsetof(type, field)
Definition: c.h:668

◆ index_parallelscan_initialize()

void index_parallelscan_initialize ( Relation  heaprel,
Relation  indexrel,
Snapshot  snapshot,
ParallelIndexScanDesc  target 
)

Definition at line 433 of file indexam.c.

References add_size(), IndexAmRoutine::aminitparallelscan, EstimateSnapshotSpace(), MAXALIGN, offsetof, OffsetToPointer, ParallelIndexScanDescData::ps_indexid, ParallelIndexScanDescData::ps_offset, ParallelIndexScanDescData::ps_relid, ParallelIndexScanDescData::ps_snapshot_data, RelationData::rd_indam, RELATION_CHECKS, RelationGetRelid, and SerializeSnapshot().

Referenced by ExecIndexOnlyScanInitializeDSM(), and ExecIndexScanInitializeDSM().

435 {
436  Size offset;
437 
439 
440  offset = add_size(offsetof(ParallelIndexScanDescData, ps_snapshot_data),
441  EstimateSnapshotSpace(snapshot));
442  offset = MAXALIGN(offset);
443 
444  target->ps_relid = RelationGetRelid(heapRelation);
445  target->ps_indexid = RelationGetRelid(indexRelation);
446  target->ps_offset = offset;
447  SerializeSnapshot(snapshot, target->ps_snapshot_data);
448 
449  /* aminitparallelscan is optional; assume no-op if not provided by AM */
450  if (indexRelation->rd_indam->aminitparallelscan != NULL)
451  {
452  void *amtarget;
453 
454  amtarget = OffsetToPointer(target, offset);
455  indexRelation->rd_indam->aminitparallelscan(amtarget);
456  }
457 }
#define RELATION_CHECKS
Definition: indexam.c:79
char ps_snapshot_data[FLEXIBLE_ARRAY_MEMBER]
Definition: relscan.h:172
void SerializeSnapshot(Snapshot snapshot, char *start_address)
Definition: snapmgr.c:2102
#define OffsetToPointer(base, offset)
Definition: c.h:648
Size EstimateSnapshotSpace(Snapshot snap)
Definition: snapmgr.c:2078
Size add_size(Size s1, Size s2)
Definition: shmem.c:498
size_t Size
Definition: c.h:473
#define MAXALIGN(LEN)
Definition: c.h:698
#define RelationGetRelid(relation)
Definition: rel.h:456
#define offsetof(type, field)
Definition: c.h:668

◆ index_rescan()

void index_rescan ( IndexScanDesc  scan,
ScanKey  keys,
int  nkeys,
ScanKey  orderbys,
int  norderbys 
)

Definition at line 295 of file indexam.c.

References IndexAmRoutine::amrescan, Assert, CHECK_SCAN_PROCEDURE, IndexScanDescData::indexRelation, IndexScanDescData::kill_prior_tuple, IndexScanDescData::numberOfKeys, IndexScanDescData::numberOfOrderBys, RelationData::rd_indam, SCAN_CHECKS, table_index_fetch_reset(), IndexScanDescData::xs_heap_continue, and IndexScanDescData::xs_heapfetch.

Referenced by check_exclusion_or_unique_constraint(), ExecIndexOnlyScanInitializeDSM(), ExecIndexOnlyScanInitializeWorker(), ExecIndexScanInitializeDSM(), ExecIndexScanInitializeWorker(), ExecInitBitmapIndexScan(), ExecReScanBitmapIndexScan(), ExecReScanIndexOnlyScan(), ExecReScanIndexScan(), get_actual_variable_endpoint(), heapam_relation_copy_for_cluster(), IndexNext(), IndexNextWithReorder(), IndexOnlyNext(), MultiExecBitmapIndexScan(), RelationFindReplTupleByIndex(), systable_beginscan(), and systable_beginscan_ordered().

298 {
299  SCAN_CHECKS;
300  CHECK_SCAN_PROCEDURE(amrescan);
301 
302  Assert(nkeys == scan->numberOfKeys);
303  Assert(norderbys == scan->numberOfOrderBys);
304 
305  /* Release resources (like buffer pins) from table accesses */
306  if (scan->xs_heapfetch)
308 
309  scan->kill_prior_tuple = false; /* for safety */
310  scan->xs_heap_continue = false;
311 
312  scan->indexRelation->rd_indam->amrescan(scan, keys, nkeys,
313  orderbys, norderbys);
314 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
#define CHECK_SCAN_PROCEDURE(pname)
Definition: indexam.c:100
Relation indexRelation
Definition: relscan.h:115
amrescan_function amrescan
Definition: amapi.h:271
static void table_index_fetch_reset(struct IndexFetchTableData *scan)
Definition: tableam.h:985
#define Assert(condition)
Definition: c.h:745
IndexFetchTableData * xs_heapfetch
Definition: relscan.h:147
#define SCAN_CHECKS
Definition: indexam.c:86
bool xs_heap_continue
Definition: relscan.h:145
bool kill_prior_tuple
Definition: relscan.h:125
int numberOfOrderBys
Definition: relscan.h:118

◆ index_restrpos()

void index_restrpos ( IndexScanDesc  scan)

Definition at line 375 of file indexam.c.

References IndexAmRoutine::amrestrpos, Assert, CHECK_SCAN_PROCEDURE, IndexScanDescData::indexRelation, IsMVCCSnapshot, IndexScanDescData::kill_prior_tuple, RelationData::rd_indam, SCAN_CHECKS, table_index_fetch_reset(), IndexScanDescData::xs_heap_continue, IndexScanDescData::xs_heapfetch, and IndexScanDescData::xs_snapshot.

Referenced by ExecIndexOnlyRestrPos(), and ExecIndexRestrPos().

376 {
378 
379  SCAN_CHECKS;
380  CHECK_SCAN_PROCEDURE(amrestrpos);
381 
382  /* release resources (like buffer pins) from table accesses */
383  if (scan->xs_heapfetch)
385 
386  scan->kill_prior_tuple = false; /* for safety */
387  scan->xs_heap_continue = false;
388 
389  scan->indexRelation->rd_indam->amrestrpos(scan);
390 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
struct SnapshotData * xs_snapshot
Definition: relscan.h:116
#define CHECK_SCAN_PROCEDURE(pname)
Definition: indexam.c:100
Relation indexRelation
Definition: relscan.h:115
#define IsMVCCSnapshot(snapshot)
Definition: snapmgr.h:97
static void table_index_fetch_reset(struct IndexFetchTableData *scan)
Definition: tableam.h:985
#define Assert(condition)
Definition: c.h:745
IndexFetchTableData * xs_heapfetch
Definition: relscan.h:147
#define SCAN_CHECKS
Definition: indexam.c:86
bool xs_heap_continue
Definition: relscan.h:145
bool kill_prior_tuple
Definition: relscan.h:125
amrestrpos_function amrestrpos
Definition: amapi.h:276

◆ index_store_float8_orderby_distances()

void index_store_float8_orderby_distances ( IndexScanDesc  scan,
Oid orderByTypes,
IndexOrderByDistance distances,
bool  recheckOrderBy 
)

Definition at line 868 of file indexam.c.

References Assert, DatumGetPointer, elog, ERROR, Float4GetDatum(), Float8GetDatum(), i, IndexScanDescData::numberOfOrderBys, pfree(), value, IndexScanDescData::xs_orderbynulls, IndexScanDescData::xs_orderbyvals, and IndexScanDescData::xs_recheckorderby.

Referenced by getNextNearest(), and spggettuple().

871 {
872  int i;
873 
874  Assert(distances || !recheckOrderBy);
875 
876  scan->xs_recheckorderby = recheckOrderBy;
877 
878  for (i = 0; i < scan->numberOfOrderBys; i++)
879  {
880  if (orderByTypes[i] == FLOAT8OID)
881  {
882 #ifndef USE_FLOAT8_BYVAL
883  /* must free any old value to avoid memory leakage */
884  if (!scan->xs_orderbynulls[i])
886 #endif
887  if (distances && !distances[i].isnull)
888  {
889  scan->xs_orderbyvals[i] = Float8GetDatum(distances[i].value);
890  scan->xs_orderbynulls[i] = false;
891  }
892  else
893  {
894  scan->xs_orderbyvals[i] = (Datum) 0;
895  scan->xs_orderbynulls[i] = true;
896  }
897  }
898  else if (orderByTypes[i] == FLOAT4OID)
899  {
900  /* convert distance function's result to ORDER BY type */
901  if (distances && !distances[i].isnull)
902  {
903  scan->xs_orderbyvals[i] = Float4GetDatum((float4) distances[i].value);
904  scan->xs_orderbynulls[i] = false;
905  }
906  else
907  {
908  scan->xs_orderbyvals[i] = (Datum) 0;
909  scan->xs_orderbynulls[i] = true;
910  }
911  }
912  else
913  {
914  /*
915  * If the ordering operator's return value is anything else, we
916  * don't know how to convert the float8 bound calculated by the
917  * distance function to that. The executor won't actually need
918  * the order by values we return here, if there are no lossy
919  * results, so only insist on converting if the *recheck flag is
920  * set.
921  */
922  if (scan->xs_recheckorderby)
923  elog(ERROR, "ORDER BY operator must return float8 or float4 if the distance function is lossy");
924  scan->xs_orderbynulls[i] = true;
925  }
926  }
927 }
static Datum Float4GetDatum(float4 X)
Definition: postgres.h:681
Datum * xs_orderbyvals
Definition: relscan.h:158
bool xs_recheckorderby
Definition: relscan.h:160
Datum Float8GetDatum(float8 X)
Definition: fmgr.c:1710
bool * xs_orderbynulls
Definition: relscan.h:159
void pfree(void *pointer)
Definition: mcxt.c:1056
#define ERROR
Definition: elog.h:43
float float4
Definition: c.h:497
uintptr_t Datum
Definition: postgres.h:367
static struct @143 value
#define Assert(condition)
Definition: c.h:745
#define DatumGetPointer(X)
Definition: postgres.h:549
#define elog(elevel,...)
Definition: elog.h:214
int i
int numberOfOrderBys
Definition: relscan.h:118

◆ index_vacuum_cleanup()

IndexBulkDeleteResult* index_vacuum_cleanup ( IndexVacuumInfo info,
IndexBulkDeleteResult stats 
)

Definition at line 709 of file indexam.c.

References IndexAmRoutine::amvacuumcleanup, CHECK_REL_PROCEDURE, IndexVacuumInfo::index, RelationData::rd_indam, and RELATION_CHECKS.

Referenced by do_analyze_rel(), and lazy_cleanup_index().

711 {
712  Relation indexRelation = info->index;
713 
715  CHECK_REL_PROCEDURE(amvacuumcleanup);
716 
717  return indexRelation->rd_indam->amvacuumcleanup(info, stats);
718 }
struct IndexAmRoutine * rd_indam
Definition: rel.h:188
#define RELATION_CHECKS
Definition: indexam.c:79
Relation index
Definition: genam.h:46
#define CHECK_REL_PROCEDURE(pname)
Definition: indexam.c:93
amvacuumcleanup_function amvacuumcleanup
Definition: amapi.h:262

◆ IndexScanEnd()

void IndexScanEnd ( IndexScanDesc  scan)

Definition at line 145 of file genam.c.

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

Referenced by index_endscan().

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 * orderByData
Definition: relscan.h:120
void pfree(void *pointer)
Definition: mcxt.c:1056
struct ScanKeyData * keyData
Definition: relscan.h:119

◆ RelationGetIndexScan()

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

Definition at line 81 of file genam.c.

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().

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 }
bool TransactionStartedDuringRecovery(void)
Definition: xact.c:970
struct ScanKeyData * orderByData
Definition: relscan.h:120
IndexTuple xs_itup
Definition: relscan.h:139
struct TupleDescData * xs_itupdesc
Definition: relscan.h:140
struct TupleDescData * xs_hitupdesc
Definition: relscan.h:142
struct SnapshotData * xs_snapshot
Definition: relscan.h:116
bool ignore_killed_tuples
Definition: relscan.h:126
Relation indexRelation
Definition: relscan.h:115
Relation heapRelation
Definition: relscan.h:114
bool xactStartedInRecovery
Definition: relscan.h:127
ScanKeyData * ScanKey
Definition: skey.h:75
#define InvalidSnapshot
Definition: snapshot.h:123
IndexFetchTableData * xs_heapfetch
Definition: relscan.h:147
struct ScanKeyData * keyData
Definition: relscan.h:119
void * palloc(Size size)
Definition: mcxt.c:949
HeapTuple xs_hitup
Definition: relscan.h:141
bool kill_prior_tuple
Definition: relscan.h:125
int numberOfOrderBys
Definition: relscan.h:118
struct IndexScanDescData * IndexScanDesc
Definition: genam.h:87

◆ systable_beginscan()

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

Definition at line 357 of file genam.c.

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

Referenced by AfterTriggerSetState(), AlterConstraintNamespaces(), AlterDatabase(), AlterDatabaseOwner(), AlterDomainDropConstraint(), AlterDomainValidateConstraint(), AlterExtensionNamespace(), AlterPolicy(), AlterSeqNamespaces(), AlterSetting(), AlterTypeRecurse(), ApplyExtensionUpdates(), ApplySetting(), ATExecAddOf(), ATExecAlterColumnType(), ATExecAlterConstraint(), ATExecAttachPartition(), ATExecDropConstraint(), ATExecDropExpression(), ATExecValidateConstraint(), ATPrepChangePersistence(), AttrDefaultFetch(), change_owner_fix_column_acls(), change_owner_recurse_to_sequences(), changeDependenciesOf(), changeDependenciesOn(), changeDependencyFor(), CheckConstraintFetch(), checkSharedDependencies(), ChooseConstraintName(), CloneFkReferenced(), CloneRowTriggersToPartition(), ConstraintNameExists(), ConstraintNameIsUsed(), copyTemplateDependencies(), CountDBSubscriptions(), CreateComments(), CreateInheritance(), CreatePolicy(), CreateSharedComments(), CreateTrigger(), 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(), findDependentObjects(), get_catalog_object_by_oid(), get_constraint_index(), 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_object_address_attrdef(), 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(), getAutoExtensionsOfObject(), GetComment(), GetDatabaseTuple(), GetDatabaseTupleByOid(), GetDefaultOpClass(), getExtensionOfObject(), GetNewOidWithIndex(), getObjectDescription(), getObjectIdentityParts(), getOwnedSequences_internal(), GetParentedForeignKeyRefs(), GetPublicationRelations(), GetSecurityLabel(), GetSharedSecurityLabel(), GetSubscriptionNotReadyRelations(), GetSubscriptionRelations(), has_superclass(), heap_truncate_find_FKs(), index_concurrently_swap(), IndexSetParentIndex(), isObjectPinned(), isSharedObjectPinned(), LargeObjectDrop(), LargeObjectExists(), load_domaintype_info(), load_enum_cache_data(), LookupOpclassInfo(), makeConfigurationDependencies(), MakeConfigurationMapping(), MergeConstraintsIntoExisting(), MergeWithExistingConstraint(), movedb(), myLargeObjectExists(), pg_extension_config_dump(), pg_extension_ownercheck(), pg_get_constraintdef_worker(), pg_get_serial_sequence(), pg_get_triggerdef_worker(), pg_largeobject_aclmask_snapshot(), pg_largeobject_ownercheck(), RangeDelete(), recordExtensionInitPrivWorker(), recordExtObjInitPriv(), relation_has_policies(), RelationBuildPartitionDesc(), RelationBuildRowSecurity(), RelationBuildRuleLock(), RelationBuildTriggers(), RelationBuildTupleDesc(), RelationGetExclusionInfo(), RelationGetFKeyList(), RelationGetIndexList(), RelationGetStatExtList(), RelationRemoveInheritance(), RelidByRelfilenode(), RemoveAttrDefault(), RemoveAttrDefaultById(), RemoveExtensionById(), RemoveInheritance(), RemovePolicyById(), RemoveRewriteRuleById(), RemoveRoleFromObjectACL(), RemoveRoleFromObjectPolicy(), RemoveStatistics(), RemoveTriggerById(), RemoveTSConfigurationById(), rename_policy(), renametrig(), 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(), tryAttachPartitionForeignKey(), typeInheritsFrom(), vac_update_datfrozenxid(), and validatePartitionedIndex().

362 {
363  SysScanDesc sysscan;
364  Relation irel;
365 
366  if (indexOK &&
368  !ReindexIsProcessingIndex(indexId))
369  irel = index_open(indexId, AccessShareLock);
370  else
371  irel = NULL;
372 
373  sysscan = (SysScanDesc) palloc(sizeof(SysScanDescData));
374 
375  sysscan->heap_rel = heapRelation;
376  sysscan->irel = irel;
377  sysscan->slot = table_slot_create(heapRelation, NULL);
378 
379  if (snapshot == NULL)
380  {
381  Oid relid = RelationGetRelid(heapRelation);
382 
383  snapshot = RegisterSnapshot(GetCatalogSnapshot(relid));
384  sysscan->snapshot = snapshot;
385  }
386  else
387  {
388  /* Caller is responsible for any snapshot. */
389  sysscan->snapshot = NULL;
390  }
391 
392  if (irel)
393  {
394  int i;
395 
396  /* Change attribute numbers to be index column numbers. */
397  for (i = 0; i < nkeys; i++)
398  {
399  int j;
400 
401  for (j = 0; j < IndexRelationGetNumberOfAttributes(irel); j++)
402  {
403  if (key[i].sk_attno == irel->rd_index->indkey.values[j])
404  {
405  key[i].sk_attno = j + 1;
406  break;
407  }
408  }
409  if (j == IndexRelationGetNumberOfAttributes(irel))
410  elog(ERROR, "column is not in index");
411  }
412 
413  sysscan->iscan = index_beginscan(heapRelation, irel,
414  snapshot, nkeys, 0);
415  index_rescan(sysscan->iscan, key, nkeys, NULL, 0);
416  sysscan->scan = NULL;
417  }
418  else
419  {
420  /*
421  * We disallow synchronized scans when forced to use a heapscan on a
422  * catalog. In most cases the desired rows are near the front, so
423  * that the unpredictable start point of a syncscan is a serious
424  * disadvantage; and there are no compensating advantages, because
425  * it's unlikely that such scans will occur in parallel.
426  */
427  sysscan->scan = table_beginscan_strat(heapRelation, snapshot,
428  nkeys, key,
429  true, false);
430  sysscan->iscan = NULL;
431  }
432 
433  /*
434  * If CheckXidAlive is set then set a flag to indicate that system table
435  * scan is in-progress. See detailed comments in xact.c where these
436  * variables are declared.
437  */
439  bsysscan = true;
440 
441  return sysscan;
442 }
TupleTableSlot * table_slot_create(Relation relation, List **reglist)
Definition: tableam.c:91
Relation irel
Definition: relscan.h:181
struct SysScanDescData * SysScanDesc
Definition: genam.h:88
Relation heap_rel
Definition: relscan.h:180
Snapshot RegisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:865
struct SnapshotData * snapshot
Definition: relscan.h:184
Snapshot GetCatalogSnapshot(Oid relid)
Definition: snapmgr.c:442
#define AccessShareLock
Definition: lockdefs.h:36
void index_rescan(IndexScanDesc scan, ScanKey keys, int nkeys, ScanKey orderbys, int norderbys)
Definition: indexam.c:295
bool IgnoreSystemIndexes
Definition: miscinit.c:77
unsigned int Oid
Definition: postgres_ext.h:31
struct IndexScanDescData * iscan
Definition: relscan.h:183
struct TupleTableSlot * slot
Definition: relscan.h:185
static TableScanDesc table_beginscan_strat(Relation rel, Snapshot snapshot, int nkeys, struct ScanKeyData *key, bool allow_strat, bool allow_sync)
Definition: tableam.h:779
Form_pg_index rd_index
Definition: rel.h:174
#define ERROR
Definition: elog.h:43
struct TableScanDescData * scan
Definition: relscan.h:182
bool bsysscan
Definition: xact.c:96
#define IndexRelationGetNumberOfAttributes(relation)
Definition: rel.h:468
TransactionId CheckXidAlive
Definition: xact.c:95
void * palloc(Size size)
Definition: mcxt.c:949
#define elog(elevel,...)
Definition: elog.h:214
int i
#define TransactionIdIsValid(xid)
Definition: transam.h:41
bool ReindexIsProcessingIndex(Oid indexOid)
Definition: index.c:3808
#define RelationGetRelid(relation)
Definition: rel.h:456
Relation index_open(Oid relationId, LOCKMODE lockmode)
Definition: indexam.c:132
AttrNumber sk_attno
Definition: skey.h:67
IndexScanDesc index_beginscan(Relation heapRelation, Relation indexRelation, Snapshot snapshot, int nkeys, int norderbys)
Definition: indexam.c:203

◆ systable_beginscan_ordered()

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

Definition at line 616 of file genam.c.

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

Referenced by BuildEventTriggerCache(), 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().

620 {
621  SysScanDesc sysscan;
622  int i;
623 
624  /* REINDEX can probably be a hard error here ... */
625  if (ReindexIsProcessingIndex(RelationGetRelid(indexRelation)))
626  elog(ERROR, "cannot do ordered scan on index \"%s\", because it is being reindexed",
627  RelationGetRelationName(indexRelation));
628  /* ... but we only throw a warning about violating IgnoreSystemIndexes */
630  elog(WARNING, "using index \"%s\" despite IgnoreSystemIndexes",
631  RelationGetRelationName(indexRelation));
632 
633  sysscan = (SysScanDesc) palloc(sizeof(SysScanDescData));
634 
635  sysscan->heap_rel = heapRelation;
636  sysscan->irel = indexRelation;
637  sysscan->slot = table_slot_create(heapRelation, NULL);
638 
639  if (snapshot == NULL)
640  {
641  Oid relid = RelationGetRelid(heapRelation);
642 
643  snapshot = RegisterSnapshot(GetCatalogSnapshot(relid));
644  sysscan->snapshot = snapshot;
645  }
646  else
647  {
648  /* Caller is responsible for any snapshot. */
649  sysscan->snapshot = NULL;
650  }
651 
652  /* Change attribute numbers to be index column numbers. */
653  for (i = 0; i < nkeys; i++)
654  {
655  int j;
656 
657  for (j = 0; j < IndexRelationGetNumberOfAttributes(indexRelation); j++)
658  {
659  if (key[i].sk_attno == indexRelation->rd_index->indkey.values[j])
660  {
661  key[i].sk_attno = j + 1;
662  break;
663  }
664  }
665  if (j == IndexRelationGetNumberOfAttributes(indexRelation))
666  elog(ERROR, "column is not in index");
667  }
668 
669  sysscan->iscan = index_beginscan(heapRelation, indexRelation,
670  snapshot, nkeys, 0);
671  index_rescan(sysscan->iscan, key, nkeys, NULL, 0);
672  sysscan->scan = NULL;
673 
674  return sysscan;
675 }
TupleTableSlot * table_slot_create(Relation relation, List **reglist)
Definition: tableam.c:91
Relation irel
Definition: relscan.h:181
struct SysScanDescData * SysScanDesc
Definition: genam.h:88
Relation heap_rel
Definition: relscan.h:180
Snapshot RegisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:865
struct SnapshotData * snapshot
Definition: relscan.h:184
Snapshot GetCatalogSnapshot(Oid relid)
Definition: snapmgr.c:442
void index_rescan(IndexScanDesc scan, ScanKey keys, int nkeys, ScanKey orderbys, int norderbys)
Definition: indexam.c:295
bool IgnoreSystemIndexes
Definition: miscinit.c:77
unsigned int Oid
Definition: postgres_ext.h:31
struct IndexScanDescData * iscan
Definition: relscan.h:183
struct TupleTableSlot * slot
Definition: relscan.h:185
Form_pg_index rd_index
Definition: rel.h:174
#define ERROR
Definition: elog.h:43
struct TableScanDescData * scan
Definition: relscan.h:182
#define IndexRelationGetNumberOfAttributes(relation)
Definition: rel.h:468
#define RelationGetRelationName(relation)
Definition: rel.h:490
#define WARNING
Definition: elog.h:40
void * palloc(Size size)
Definition: mcxt.c:949
#define elog(elevel,...)
Definition: elog.h:214
int i
bool ReindexIsProcessingIndex(Oid indexOid)
Definition: index.c:3808
#define RelationGetRelid(relation)
Definition: rel.h:456
AttrNumber sk_attno
Definition: skey.h:67
IndexScanDesc index_beginscan(Relation heapRelation, Relation indexRelation, Snapshot snapshot, int nkeys, int norderbys)
Definition: indexam.c:203

◆ systable_endscan()

void systable_endscan ( SysScanDesc  sysscan)

Definition at line 569 of file genam.c.

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(), AlterDomainDropConstraint(), AlterDomainValidateConstraint(), AlterExtensionNamespace(), AlterPolicy(), AlterSeqNamespaces(), AlterSetting(), AlterTypeRecurse(), ApplyExtensionUpdates(), ApplySetting(), ATExecAddOf(), ATExecAlterColumnType(), ATExecAlterConstraint(), ATExecAttachPartition(), ATExecDropConstraint(), ATExecDropExpression(), ATExecValidateConstraint(), ATPrepChangePersistence(), AttrDefaultFetch(), change_owner_fix_column_acls(), change_owner_recurse_to_sequences(), changeDependenciesOf(), changeDependenciesOn(), changeDependencyFor(), CheckConstraintFetch(), checkSharedDependencies(), ChooseConstraintName(), CloneFkReferenced(), CloneRowTriggersToPartition(), ConstraintNameExists(), ConstraintNameIsUsed(), copyTemplateDependencies(), CountDBSubscriptions(), CreateComments(), CreateInheritance(), CreatePolicy(), CreateSharedComments(), CreateTrigger(), 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(), findDependentObjects(), get_catalog_object_by_oid(), get_constraint_index(), 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_object_address_attrdef(), 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(), getAutoExtensionsOfObject(), GetComment(), GetDatabaseTuple(), GetDatabaseTupleByOid(), GetDefaultOpClass(), getExtensionOfObject(), GetNewOidWithIndex(), getObjectDescription(), getObjectIdentityParts(), getOwnedSequences_internal(), GetParentedForeignKeyRefs(), GetPublicationRelations(), GetSecurityLabel(), GetSharedSecurityLabel(), GetSubscriptionNotReadyRelations(), GetSubscriptionRelations(), has_superclass(), heap_truncate_find_FKs(), index_concurrently_swap(), IndexSetParentIndex(), isObjectPinned(), isSharedObjectPinned(), LargeObjectDrop(), LargeObjectExists(), load_domaintype_info(), load_enum_cache_data(), LookupOpclassInfo(), makeConfigurationDependencies(), MakeConfigurationMapping(), MergeConstraintsIntoExisting(), MergeWithExistingConstraint(), movedb(), myLargeObjectExists(), pg_extension_config_dump(), pg_extension_ownercheck(), pg_get_constraintdef_worker(), pg_get_serial_sequence(), pg_get_triggerdef_worker(), pg_largeobject_aclmask_snapshot(), pg_largeobject_ownercheck(), RangeDelete(), recordExtensionInitPrivWorker(), recordExtObjInitPriv(), relation_has_policies(), RelationBuildPartitionDesc(), RelationBuildRowSecurity(), RelationBuildRuleLock(), RelationBuildTriggers(), RelationBuildTupleDesc(), RelationGetExclusionInfo(), RelationGetFKeyList(), RelationGetIndexList(), RelationGetStatExtList(), RelationRemoveInheritance(), RelidByRelfilenode(), RemoveAttrDefault(), RemoveAttrDefaultById(), RemoveExtensionById(), RemoveInheritance(), RemovePolicyById(), RemoveRewriteRuleById(), RemoveRoleFromObjectACL(), RemoveRoleFromObjectPolicy(), RemoveStatistics(), RemoveTriggerById(), RemoveTSConfigurationById(), rename_policy(), renametrig(), 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(), tryAttachPartitionForeignKey(), typeInheritsFrom(), vac_update_datfrozenxid(), and validatePartitionedIndex().

570 {
571  if (sysscan->slot)
572  {
574  sysscan->slot = NULL;
575  }
576 
577  if (sysscan->irel)
578  {
579  index_endscan(sysscan->iscan);
580  index_close(sysscan->irel, AccessShareLock);
581  }
582  else
583  table_endscan(sysscan->scan);
584 
585  if (sysscan->snapshot)
586  UnregisterSnapshot(sysscan->snapshot);
587 
588  /*
589  * Reset the bsysscan flag at the end of the systable scan. See
590  * detailed comments in xact.c where these variables are declared.
591  */
593  bsysscan = false;
594 
595  pfree(sysscan);
596 }
Relation irel
Definition: relscan.h:181
struct SnapshotData * snapshot
Definition: relscan.h:184
#define AccessShareLock
Definition: lockdefs.h:36
struct IndexScanDescData * iscan
Definition: relscan.h:183
struct TupleTableSlot * slot
Definition: relscan.h:185
void pfree(void *pointer)
Definition: mcxt.c:1056
struct TableScanDescData * scan
Definition: relscan.h:182
bool bsysscan
Definition: xact.c:96
void ExecDropSingleTupleTableSlot(TupleTableSlot *slot)
Definition: execTuples.c:1224
void index_endscan(IndexScanDesc scan)
Definition: indexam.c:321
void UnregisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:907
TransactionId CheckXidAlive
Definition: xact.c:95
void index_close(Relation relation, LOCKMODE lockmode)
Definition: indexam.c:158
static void table_endscan(TableScanDesc scan)
Definition: tableam.h:863
#define TransactionIdIsValid(xid)
Definition: transam.h:41

◆ systable_endscan_ordered()

void systable_endscan_ordered ( SysScanDesc  sysscan)

Definition at line 706 of file genam.c.

References Assert, ExecDropSingleTupleTableSlot(), index_endscan(), SysScanDescData::irel, SysScanDescData::iscan, pfree(), SysScanDescData::slot, SysScanDescData::snapshot, and UnregisterSnapshot().

Referenced by BuildEventTriggerCache(), 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().

707 {
708  if (sysscan->slot)
709  {
711  sysscan->slot = NULL;
712  }
713 
714  Assert(sysscan->irel);
715  index_endscan(sysscan->iscan);
716  if (sysscan->snapshot)
717  UnregisterSnapshot(sysscan->snapshot);
718  pfree(sysscan);
719 }
Relation irel
Definition: relscan.h:181
struct SnapshotData * snapshot
Definition: relscan.h:184
struct IndexScanDescData * iscan
Definition: relscan.h:183
struct TupleTableSlot * slot
Definition: relscan.h:185
void pfree(void *pointer)
Definition: mcxt.c:1056
void ExecDropSingleTupleTableSlot(TupleTableSlot *slot)
Definition: execTuples.c:1224
void index_endscan(IndexScanDesc scan)
Definition: indexam.c:321
void UnregisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:907
#define Assert(condition)
Definition: c.h:745

◆ systable_getnext()

HeapTuple systable_getnext ( SysScanDesc  sysscan)

Definition at line 476 of file genam.c.

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(), AlterDomainDropConstraint(), AlterDomainValidateConstraint(), AlterExtensionNamespace(), AlterPolicy(), AlterSeqNamespaces(), AlterSetting(), AlterTypeRecurse(), ApplyExtensionUpdates(), ApplySetting(), ATExecAddOf(), ATExecAlterColumnType(), ATExecAlterConstraint(), ATExecAttachPartition(), ATExecDropConstraint(), ATExecDropExpression(), ATExecValidateConstraint(), ATPrepChangePersistence(), AttrDefaultFetch(), change_owner_fix_column_acls(), change_owner_recurse_to_sequences(), changeDependenciesOf(), changeDependenciesOn(), changeDependencyFor(), CheckConstraintFetch(), checkSharedDependencies(), ChooseConstraintName(), CloneFkReferenced(), CloneRowTriggersToPartition(), ConstraintNameExists(), ConstraintNameIsUsed(), copyTemplateDependencies(), CountDBSubscriptions(), CreateComments(), CreateInheritance(), CreatePolicy(), CreateSharedComments(), CreateTrigger(), 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(), findDependentObjects(), get_catalog_object_by_oid(), get_constraint_index(), 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_object_address_attrdef(), 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(), getAutoExtensionsOfObject(), GetComment(), GetDatabaseTuple(), GetDatabaseTupleByOid(), GetDefaultOpClass(), getExtensionOfObject(), GetNewOidWithIndex(), getObjectDescription(), getObjectIdentityParts(), getOwnedSequences_internal(), GetParentedForeignKeyRefs(), GetPublicationRelations(), GetSecurityLabel(), GetSharedSecurityLabel(), GetSubscriptionNotReadyRelations(), GetSubscriptionRelations(), has_superclass(), heap_truncate_find_FKs(), index_concurrently_swap(), IndexSetParentIndex(), isObjectPinned(), isSharedObjectPinned(), LargeObjectDrop(), LargeObjectExists(), load_domaintype_info(), load_enum_cache_data(), LookupOpclassInfo(), makeConfigurationDependencies(), MakeConfigurationMapping(), MergeConstraintsIntoExisting(), MergeWithExistingConstraint(), movedb(), myLargeObjectExists(), pg_extension_config_dump(), pg_extension_ownercheck(), pg_get_constraintdef_worker(), pg_get_serial_sequence(), pg_get_triggerdef_worker(), pg_largeobject_aclmask_snapshot(), pg_largeobject_ownercheck(), RangeDelete(), recordExtensionInitPrivWorker(), recordExtObjInitPriv(), relation_has_policies(), RelationBuildPartitionDesc(), RelationBuildRowSecurity(), RelationBuildRuleLock(), RelationBuildTriggers(), RelationBuildTupleDesc(), RelationGetExclusionInfo(), RelationGetFKeyList(), RelationGetIndexList(), RelationGetStatExtList(), RelationRemoveInheritance(), RelidByRelfilenode(), RemoveAttrDefault(), RemoveAttrDefaultById(), RemoveExtensionById(), RemoveInheritance(), RemovePolicyById(), RemoveRewriteRuleById(), RemoveRoleFromObjectACL(), RemoveRoleFromObjectPolicy(), RemoveStatistics(), RemoveTriggerById(), RemoveTSConfigurationById(), rename_policy(), renametrig(), 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(), tryAttachPartitionForeignKey(), typeInheritsFrom(), vac_update_datfrozenxid(), and validatePartitionedIndex().

477 {
478  HeapTuple htup = NULL;
479 
480  if (sysscan->irel)
481  {
482  if (index_getnext_slot(sysscan->iscan, ForwardScanDirection, sysscan->slot))
483  {
484  bool shouldFree;
485 
486  htup = ExecFetchSlotHeapTuple(sysscan->slot, false, &shouldFree);
487  Assert(!shouldFree);
488 
489  /*
490  * We currently don't need to support lossy index operators for
491  * any system catalog scan. It could be done here, using the scan
492  * keys to drive the operator calls, if we arranged to save the
493  * heap attnums during systable_beginscan(); this is practical
494  * because we still wouldn't need to support indexes on
495  * expressions.
496  */
497  if (sysscan->iscan->xs_recheck)
498  elog(ERROR, "system catalog scans with lossy index conditions are not implemented");
499  }
500  }
501  else
502  {
503  if (table_scan_getnextslot(sysscan->scan, ForwardScanDirection, sysscan->slot))
504  {
505  bool shouldFree;
506 
507  htup = ExecFetchSlotHeapTuple(sysscan->slot, false, &shouldFree);
508  Assert(!shouldFree);
509  }
510  }
511 
512  /*
513  * Handle the concurrent abort while fetching the catalog tuple during
514  * logical streaming of a transaction.
515  */
517 
518  return htup;
519 }
Relation irel
Definition: relscan.h:181
static bool table_scan_getnextslot(TableScanDesc sscan, ScanDirection direction, TupleTableSlot *slot)
Definition: tableam.h:904
struct IndexScanDescData * iscan
Definition: relscan.h:183
struct TupleTableSlot * slot
Definition: relscan.h:185
#define ERROR
Definition: elog.h:43
struct TableScanDescData * scan
Definition: relscan.h:182
HeapTuple ExecFetchSlotHeapTuple(TupleTableSlot *slot, bool materialize, bool *shouldFree)
Definition: execTuples.c:1614
#define Assert(condition)
Definition: c.h:745
bool index_getnext_slot(IndexScanDesc scan, ScanDirection direction, TupleTableSlot *slot)
Definition: indexam.c:613
#define elog(elevel,...)
Definition: elog.h:214
static void HandleConcurrentAbort()
Definition: genam.c:453

◆ systable_getnext_ordered()

HeapTuple systable_getnext_ordered ( SysScanDesc  sysscan,
ScanDirection  direction 
)

Definition at line 681 of file genam.c.

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

Referenced by BuildEventTriggerCache(), 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().

682 {
683  HeapTuple htup = NULL;
684 
685  Assert(sysscan->irel);
686  if (index_getnext_slot(sysscan->iscan, direction, sysscan->slot))
687  htup = ExecFetchSlotHeapTuple(sysscan->slot, false, NULL);
688 
689  /* See notes in systable_getnext */
690  if (htup && sysscan->iscan->xs_recheck)
691  elog(ERROR, "system catalog scans with lossy index conditions are not implemented");
692 
693  /*
694  * Handle the concurrent abort while fetching the catalog tuple during
695  * logical streaming of a transaction.
696  */
698 
699  return htup;
700 }
Relation irel
Definition: relscan.h:181
struct IndexScanDescData * iscan
Definition: relscan.h:183
struct TupleTableSlot * slot
Definition: relscan.h:185
#define ERROR
Definition: elog.h:43
HeapTuple ExecFetchSlotHeapTuple(TupleTableSlot *slot, bool materialize, bool *shouldFree)
Definition: execTuples.c:1614
#define Assert(condition)
Definition: c.h:745
bool index_getnext_slot(IndexScanDesc scan, ScanDirection direction, TupleTableSlot *slot)
Definition: indexam.c:613
#define elog(elevel,...)
Definition: elog.h:214
static void HandleConcurrentAbort()
Definition: genam.c:453

◆ systable_recheck_tuple()

bool systable_recheck_tuple ( SysScanDesc  sysscan,
HeapTuple  tup 
)

Definition at line 535 of file genam.c.

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

Referenced by findDependentObjects(), and shdepDropOwned().

536 {
537  Snapshot freshsnap;
538  bool result;
539 
540  Assert(tup == ExecFetchSlotHeapTuple(sysscan->slot, false, NULL));
541 
542  /*
543  * Trust that table_tuple_satisfies_snapshot() and its subsidiaries
544  * (commonly LockBuffer() and HeapTupleSatisfiesMVCC()) do not themselves
545  * acquire snapshots, so we need not register the snapshot. Those
546  * facilities are too low-level to have any business scanning tables.
547  */
548  freshsnap = GetCatalogSnapshot(RelationGetRelid(sysscan->heap_rel));
549 
550  result = table_tuple_satisfies_snapshot(sysscan->heap_rel,
551  sysscan->slot,
552  freshsnap);
553 
554  /*
555  * Handle the concurrent abort while fetching the catalog tuple during
556  * logical streaming of a transaction.
557  */
559 
560  return result;
561 }
Relation heap_rel
Definition: relscan.h:180
Snapshot GetCatalogSnapshot(Oid relid)
Definition: snapmgr.c:442
struct TupleTableSlot * slot
Definition: relscan.h:185
HeapTuple ExecFetchSlotHeapTuple(TupleTableSlot *slot, bool materialize, bool *shouldFree)
Definition: execTuples.c:1614
static bool table_tuple_satisfies_snapshot(Relation rel, TupleTableSlot *slot, Snapshot snapshot)
Definition: tableam.h:1118
#define Assert(condition)
Definition: c.h:745
static void HandleConcurrentAbort()
Definition: genam.c:453
#define RelationGetRelid(relation)
Definition: rel.h:456