indexam.c File Reference

#include "postgres.h"
#include "access/amapi.h"
#include "access/heapam.h"
#include "access/relscan.h"
#include "access/tableam.h"
#include "access/transam.h"
#include "access/xlog.h"
#include "catalog/index.h"
#include "catalog/pg_type.h"
#include "pgstat.h"
#include "storage/bufmgr.h"
#include "storage/lmgr.h"
#include "storage/predicate.h"
#include "utils/snapmgr.h"

Include dependency graph for indexam.c:

Go to the source code of this file.

Macros
#define	RELATION_CHECKS
#define	SCAN_CHECKS
#define	CHECK_REL_PROCEDURE(pname)
#define	CHECK_SCAN_PROCEDURE(pname)

Functions
static IndexScanDesc	index_beginscan_internal (Relation indexRelation, int nkeys, int norderbys, Snapshot snapshot, ParallelIndexScanDesc pscan, bool temp_snap)
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, 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 indexRelation, Snapshot snapshot)
void	index_parallelscan_initialize (Relation heapRelation, Relation indexRelation, 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, TupleTableSlot *slot)
bool	index_getnext_slot (IndexScanDesc scan, ScanDirection direction, TupleTableSlot *slot)
int64	index_getbitmap (IndexScanDesc scan, TIDBitmap *bitmap)
IndexBulkDeleteResult *	index_bulk_delete (IndexVacuumInfo *info, IndexBulkDeleteResult *stats, IndexBulkDeleteCallback callback, void *callback_state)
IndexBulkDeleteResult *	index_vacuum_cleanup (IndexVacuumInfo *info, IndexBulkDeleteResult *stats)
bool	index_can_return (Relation indexRelation, int attno)
RegProcedure	index_getprocid (Relation irel, AttrNumber attnum, uint16 procnum)
FmgrInfo *	index_getprocinfo (Relation irel, AttrNumber attnum, uint16 procnum)
void	index_store_float8_orderby_distances (IndexScanDesc scan, Oid *orderByTypes, IndexOrderByDistance *distances, bool recheckOrderBy)

Macro Definition Documentation

CHECK_REL_PROCEDURE

#define CHECK_REL_PROCEDURE

(

pname

)

Value:

do { \
    if (indexRelation->rd_indam->pname == NULL) \
        elog(ERROR, "function %s is not defined for index %s", \
             CppAsString(pname), RelationGetRelationName(indexRelation)); \
} while(0)

Definition at line 87 of file indexam.c.

Referenced by index_beginscan_internal(), index_bulk_delete(), index_insert(), and index_vacuum_cleanup().

CHECK_SCAN_PROCEDURE

#define CHECK_SCAN_PROCEDURE

(

pname

)

Value:

do { \
    if (scan->indexRelation->rd_indam->pname == NULL) \
        elog(ERROR, "function %s is not defined for index %s", \
             CppAsString(pname), RelationGetRelationName(scan->indexRelation)); \
} while(0)

Definition at line 94 of file indexam.c.

Referenced by index_endscan(), index_getbitmap(), index_getnext_tid(), index_markpos(), index_rescan(), and index_restrpos().

RELATION_CHECKS

#define RELATION_CHECKS

Value:

( \
    AssertMacro(RelationIsValid(indexRelation)), \
    AssertMacro(PointerIsValid(indexRelation->rd_indam)), \
    AssertMacro(!ReindexIsProcessingIndex(RelationGetRelid(indexRelation))) \
)

Definition at line 73 of file indexam.c.

Referenced by index_beginscan_internal(), index_bulk_delete(), index_can_return(), index_insert(), index_parallelscan_estimate(), index_parallelscan_initialize(), and index_vacuum_cleanup().

SCAN_CHECKS

#define SCAN_CHECKS

Value:

( \
    AssertMacro(IndexScanIsValid(scan)), \
    AssertMacro(RelationIsValid(scan->indexRelation)), \
    AssertMacro(PointerIsValid(scan->indexRelation->rd_indam)) \
)

Definition at line 80 of file indexam.c.

Referenced by index_endscan(), index_getbitmap(), index_getnext_tid(), index_markpos(), index_parallelrescan(), index_rescan(), and index_restrpos().

Function Documentation

index_beginscan()

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

Definition at line 197 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().

{
    IndexScanDesc scan;

    scan = index_beginscan_internal(indexRelation, nkeys, norderbys, snapshot, NULL, false);

    /*
     * Save additional parameters into the scandesc.  Everything else was set
     * up by RelationGetIndexScan.
     */
    scan->heapRelation = heapRelation;
    scan->xs_snapshot = snapshot;

    /* prepare to fetch index matches from table */
    scan->xs_heapfetch = table_index_fetch_begin(heapRelation);

    return scan;
}

index_beginscan_bitmap()

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

Definition at line 226 of file indexam.c.

References index_beginscan_internal(), and IndexScanDescData::xs_snapshot.

Referenced by ExecInitBitmapIndexScan().

{
    IndexScanDesc scan;

    scan = index_beginscan_internal(indexRelation, nkeys, 0, snapshot, NULL, false);

    /*
     * Save additional parameters into the scandesc.  Everything else was set
     * up by RelationGetIndexScan.
     */
    scan->xs_snapshot = snapshot;

    return scan;
}

index_beginscan_internal()

static IndexScanDesc index_beginscan_internal ( Relation  indexRelation, int  nkeys, int  norderbys, Snapshot  snapshot, ParallelIndexScanDesc  pscan, bool  temp_snap  )

static

Definition at line 247 of file indexam.c.

References IndexAmRoutine::ambeginscan, IndexAmRoutine::ampredlocks, CHECK_REL_PROCEDURE, IndexScanDescData::parallel_scan, PredicateLockRelation(), RelationData::rd_indam, RELATION_CHECKS, RelationIncrementReferenceCount(), and IndexScanDescData::xs_temp_snap.

Referenced by index_beginscan(), index_beginscan_bitmap(), and index_beginscan_parallel().

{
    IndexScanDesc scan;

    RELATION_CHECKS;
    CHECK_REL_PROCEDURE(ambeginscan);

    if (!(indexRelation->rd_indam->ampredlocks))
        PredicateLockRelation(indexRelation, snapshot);

    /*
     * We hold a reference count to the relcache entry throughout the scan.
     */
    RelationIncrementReferenceCount(indexRelation);

    /*
     * Tell the AM to open a scan.
     */
    scan = indexRelation->rd_indam->ambeginscan(indexRelation, nkeys,
                                                norderbys);
    /* Initialize information for parallel scan. */
    scan->parallel_scan = pscan;
    scan->xs_temp_snap = temp_snap;

    return scan;
}

index_beginscan_parallel()

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

Definition at line 476 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().

{
    Snapshot    snapshot;
    IndexScanDesc scan;

    Assert(RelationGetRelid(heaprel) == pscan->ps_relid);
    snapshot = RestoreSnapshot(pscan->ps_snapshot_data);
    RegisterSnapshot(snapshot);
    scan = index_beginscan_internal(indexrel, nkeys, norderbys, snapshot,
                                    pscan, true);

    /*
     * Save additional parameters into the scandesc.  Everything else was set
     * up by index_beginscan_internal.
     */
    scan->heapRelation = heaprel;
    scan->xs_snapshot = snapshot;

    /* prepare to fetch index matches from table */
    scan->xs_heapfetch = table_index_fetch_begin(heaprel);

    return scan;
}

index_bulk_delete()

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

Definition at line 682 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().

{
    Relation    indexRelation = info->index;

    RELATION_CHECKS;
    CHECK_REL_PROCEDURE(ambulkdelete);

    return indexRelation->rd_indam->ambulkdelete(info, stats,
                                                 callback, callback_state);
}

index_can_return()

bool index_can_return	(	Relation	indexRelation,
		int	attno
	)

Definition at line 722 of file indexam.c.

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

Referenced by get_relation_info(), and indexam_property().

{
    RELATION_CHECKS;

    /* amcanreturn is optional; assume false if not provided by AM */
    if (indexRelation->rd_indam->amcanreturn == NULL)
        return false;

    return indexRelation->rd_indam->amcanreturn(indexRelation, attno);
}

index_close()

void index_close	(	Relation	relation,
		LOCKMODE	lockmode
	)

Definition at line 152 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(), 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().

{
    LockRelId   relid = relation->rd_lockInfo.lockRelId;

    Assert(lockmode >= NoLock && lockmode < MAX_LOCKMODES);

    /* The relcache does the real work... */
    RelationClose(relation);

    if (lockmode != NoLock)
        UnlockRelationId(&relid, lockmode);
}

index_endscan()

void index_endscan

(

IndexScanDesc

scan

)

Definition at line 315 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().

{
    SCAN_CHECKS;
    CHECK_SCAN_PROCEDURE(amendscan);

    /* Release resources (like buffer pins) from table accesses */
    if (scan->xs_heapfetch)
    {
        table_index_fetch_end(scan->xs_heapfetch);
        scan->xs_heapfetch = NULL;
    }

    /* End the AM's scan */
    scan->indexRelation->rd_indam->amendscan(scan);

    /* Release index refcount acquired by index_beginscan */
    RelationDecrementReferenceCount(scan->indexRelation);

    if (scan->xs_temp_snap)
        UnregisterSnapshot(scan->xs_snapshot);

    /* Release the scan data structure itself */
    IndexScanEnd(scan);
}

index_fetch_heap()

bool index_fetch_heap	(	IndexScanDesc	scan,
		TupleTableSlot *	slot
	)

Definition at line 566 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().

{
    bool        all_dead = false;
    bool        found;

    found = table_index_fetch_tuple(scan->xs_heapfetch, &scan->xs_heaptid,
                                    scan->xs_snapshot, slot,
                                    &scan->xs_heap_continue, &all_dead);

    if (found)
        pgstat_count_heap_fetch(scan->indexRelation);

    /*
     * If we scanned a whole HOT chain and found only dead tuples, tell index
     * AM to kill its entry for that TID (this will take effect in the next
     * amgettuple call, in index_getnext_tid).  We do not do this when in
     * recovery because it may violate MVCC to do so.  See comments in
     * RelationGetIndexScan().
     */
    if (!scan->xactStartedInRecovery)
        scan->kill_prior_tuple = all_dead;

    return found;
}

index_getbitmap()

int64 index_getbitmap	(	IndexScanDesc	scan,
		TIDBitmap *	bitmap
	)

Definition at line 652 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().

{
    int64       ntids;

    SCAN_CHECKS;
    CHECK_SCAN_PROCEDURE(amgetbitmap);

    /* just make sure this is false... */
    scan->kill_prior_tuple = false;

    /*
     * have the am's getbitmap proc do all the work.
     */
    ntids = scan->indexRelation->rd_indam->amgetbitmap(scan, bitmap);

    pgstat_count_index_tuples(scan->indexRelation, ntids);

    return ntids;
}

index_getnext_slot()

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

Definition at line 607 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().

{
    for (;;)
    {
        if (!scan->xs_heap_continue)
        {
            ItemPointer tid;

            /* Time to fetch the next TID from the index */
            tid = index_getnext_tid(scan, direction);

            /* If we're out of index entries, we're done */
            if (tid == NULL)
                break;

            Assert(ItemPointerEquals(tid, &scan->xs_heaptid));
        }

        /*
         * Fetch the next (or only) visible heap tuple for this index entry.
         * If we don't find anything, loop around and grab the next TID from
         * the index.
         */
        Assert(ItemPointerIsValid(&scan->xs_heaptid));
        if (index_fetch_heap(scan, slot))
            return true;
    }

    return false;
}

index_getnext_tid()

ItemPointer index_getnext_tid	(	IndexScanDesc	scan,
		ScanDirection	direction
	)

Definition at line 509 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().

{
    bool        found;

    SCAN_CHECKS;
    CHECK_SCAN_PROCEDURE(amgettuple);

    Assert(TransactionIdIsValid(RecentGlobalXmin));

    /*
     * The AM's amgettuple proc finds the next index entry matching the scan
     * keys, and puts the TID into scan->xs_heaptid.  It should also set
     * scan->xs_recheck and possibly scan->xs_itup/scan->xs_hitup, though we
     * pay no attention to those fields here.
     */
    found = scan->indexRelation->rd_indam->amgettuple(scan, direction);

    /* Reset kill flag immediately for safety */
    scan->kill_prior_tuple = false;
    scan->xs_heap_continue = false;

    /* If we're out of index entries, we're done */
    if (!found)
    {
        /* release resources (like buffer pins) from table accesses */
        if (scan->xs_heapfetch)
            table_index_fetch_reset(scan->xs_heapfetch);

        return NULL;
    }
    Assert(ItemPointerIsValid(&scan->xs_heaptid));

    pgstat_count_index_tuples(scan->indexRelation, 1);

    /* Return the TID of the tuple we found. */
    return &scan->xs_heaptid;
}

index_getprocid()

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

Definition at line 760 of file indexam.c.

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

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

{
    RegProcedure *loc;
    int         nproc;
    int         procindex;

    nproc = irel->rd_indam->amsupport;

    Assert(procnum > 0 && procnum <= (uint16) nproc);

    procindex = (nproc * (attnum - 1)) + (procnum - 1);

    loc = irel->rd_support;

    Assert(loc != NULL);

    return loc[procindex];
}

index_getprocinfo()

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

Definition at line 794 of file indexam.c.

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

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

{
    FmgrInfo   *locinfo;
    int         nproc;
    int         procindex;

    nproc = irel->rd_indam->amsupport;

    Assert(procnum > 0 && procnum <= (uint16) nproc);

    procindex = (nproc * (attnum - 1)) + (procnum - 1);

    locinfo = irel->rd_supportinfo;

    Assert(locinfo != NULL);

    locinfo += procindex;

    /* Initialize the lookup info if first time through */
    if (locinfo->fn_oid == InvalidOid)
    {
        RegProcedure *loc = irel->rd_support;
        RegProcedure procId;

        Assert(loc != NULL);

        procId = loc[procindex];

        /*
         * Complain if function was not found during IndexSupportInitialize.
         * This should not happen unless the system tables contain bogus
         * entries for the index opclass.  (If an AM wants to allow a support
         * function to be optional, it can use index_getprocid.)
         */
        if (!RegProcedureIsValid(procId))
            elog(ERROR, "missing support function %d for attribute %d of index \"%s\"",
                 procnum, attnum, RelationGetRelationName(irel));

        fmgr_info_cxt(procId, locinfo, irel->rd_indexcxt);
    }

    return locinfo;
}

index_insert()

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

Definition at line 170 of file indexam.c.

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

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

{
    RELATION_CHECKS;
    CHECK_REL_PROCEDURE(aminsert);

    if (!(indexRelation->rd_indam->ampredlocks))
        CheckForSerializableConflictIn(indexRelation,
                                       (HeapTuple) NULL,
                                       InvalidBuffer);

    return indexRelation->rd_indam->aminsert(indexRelation, values, isnull,
                                             heap_t_ctid, heapRelation,
                                             checkUnique, indexInfo);
}

index_markpos()

void index_markpos

(

IndexScanDesc

scan

)

Definition at line 345 of file indexam.c.

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

Referenced by ExecIndexMarkPos(), and ExecIndexOnlyMarkPos().

{
    SCAN_CHECKS;
    CHECK_SCAN_PROCEDURE(ammarkpos);

    scan->indexRelation->rd_indam->ammarkpos(scan);
}

index_open()

Relation index_open	(	Oid	relationId,
		LOCKMODE	lockmode
	)

Definition at line 126 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(), 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().

{
    Relation    r;

    r = relation_open(relationId, lockmode);

    if (r->rd_rel->relkind != RELKIND_INDEX &&
        r->rd_rel->relkind != RELKIND_PARTITIONED_INDEX)
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("\"%s\" is not an index",
                        RelationGetRelationName(r))));

    return r;
}

index_parallelrescan()

void index_parallelrescan

(

IndexScanDesc

scan

)

Definition at line 458 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().

{
    SCAN_CHECKS;

    if (scan->xs_heapfetch)
        table_index_fetch_reset(scan->xs_heapfetch);

    /* amparallelrescan is optional; assume no-op if not provided by AM */
    if (scan->indexRelation->rd_indam->amparallelrescan != NULL)
        scan->indexRelation->rd_indam->amparallelrescan(scan);
}

index_parallelscan_estimate()

Size index_parallelscan_estimate	(	Relation	indexRelation,
		Snapshot	snapshot
	)

Definition at line 394 of file indexam.c.

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

Referenced by ExecIndexOnlyScanEstimate(), and ExecIndexScanEstimate().

{
    Size        nbytes;

    RELATION_CHECKS;

    nbytes = offsetof(ParallelIndexScanDescData, ps_snapshot_data);
    nbytes = add_size(nbytes, EstimateSnapshotSpace(snapshot));
    nbytes = MAXALIGN(nbytes);

    /*
     * If amestimateparallelscan is not provided, assume there is no
     * AM-specific data needed.  (It's hard to believe that could work, but
     * it's easy enough to cater to it here.)
     */
    if (indexRelation->rd_indam->amestimateparallelscan != NULL)
        nbytes = add_size(nbytes,
                          indexRelation->rd_indam->amestimateparallelscan());

    return nbytes;
}

index_parallelscan_initialize()

void index_parallelscan_initialize	(	Relation	heapRelation,
		Relation	indexRelation,
		Snapshot	snapshot,
		ParallelIndexScanDesc	target
	)

Definition at line 427 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().

{
    Size        offset;

    RELATION_CHECKS;

    offset = add_size(offsetof(ParallelIndexScanDescData, ps_snapshot_data),
                      EstimateSnapshotSpace(snapshot));
    offset = MAXALIGN(offset);

    target->ps_relid = RelationGetRelid(heapRelation);
    target->ps_indexid = RelationGetRelid(indexRelation);
    target->ps_offset = offset;
    SerializeSnapshot(snapshot, target->ps_snapshot_data);

    /* aminitparallelscan is optional; assume no-op if not provided by AM */
    if (indexRelation->rd_indam->aminitparallelscan != NULL)
    {
        void       *amtarget;

        amtarget = OffsetToPointer(target, offset);
        indexRelation->rd_indam->aminitparallelscan(amtarget);
    }
}

index_rescan()

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

Definition at line 289 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().

{
    SCAN_CHECKS;
    CHECK_SCAN_PROCEDURE(amrescan);

    Assert(nkeys == scan->numberOfKeys);
    Assert(norderbys == scan->numberOfOrderBys);

    /* Release resources (like buffer pins) from table accesses */
    if (scan->xs_heapfetch)
        table_index_fetch_reset(scan->xs_heapfetch);

    scan->kill_prior_tuple = false; /* for safety */
    scan->xs_heap_continue = false;

    scan->indexRelation->rd_indam->amrescan(scan, keys, nkeys,
                                            orderbys, norderbys);
}

index_restrpos()

void index_restrpos

(

IndexScanDesc

scan

)

Definition at line 369 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().

{
    Assert(IsMVCCSnapshot(scan->xs_snapshot));

    SCAN_CHECKS;
    CHECK_SCAN_PROCEDURE(amrestrpos);

    /* release resources (like buffer pins) from table accesses */
    if (scan->xs_heapfetch)
        table_index_fetch_reset(scan->xs_heapfetch);

    scan->kill_prior_tuple = false; /* for safety */
    scan->xs_heap_continue = false;

    scan->indexRelation->rd_indam->amrestrpos(scan);
}

index_store_float8_orderby_distances()

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

Definition at line 849 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().

{
    int         i;

    Assert(distances || !recheckOrderBy);

    scan->xs_recheckorderby = recheckOrderBy;

    for (i = 0; i < scan->numberOfOrderBys; i++)
    {
        if (orderByTypes[i] == FLOAT8OID)
        {
#ifndef USE_FLOAT8_BYVAL
            /* must free any old value to avoid memory leakage */
            if (!scan->xs_orderbynulls[i])
                pfree(DatumGetPointer(scan->xs_orderbyvals[i]));
#endif
            if (distances && !distances[i].isnull)
            {
                scan->xs_orderbyvals[i] = Float8GetDatum(distances[i].value);
                scan->xs_orderbynulls[i] = false;
            }
            else
            {
                scan->xs_orderbyvals[i] = (Datum) 0;
                scan->xs_orderbynulls[i] = true;
            }
        }
        else if (orderByTypes[i] == FLOAT4OID)
        {
            /* convert distance function's result to ORDER BY type */
            if (distances && !distances[i].isnull)
            {
                scan->xs_orderbyvals[i] = Float4GetDatum((float4) distances[i].value);
                scan->xs_orderbynulls[i] = false;
            }
            else
            {
                scan->xs_orderbyvals[i] = (Datum) 0;
                scan->xs_orderbynulls[i] = true;
            }
        }
        else
        {
            /*
             * If the ordering operator's return value is anything else, we
             * don't know how to convert the float8 bound calculated by the
             * distance function to that.  The executor won't actually need
             * the order by values we return here, if there are no lossy
             * results, so only insist on converting if the *recheck flag is
             * set.
             */
            if (scan->xs_recheckorderby)
                elog(ERROR, "ORDER BY operator must return float8 or float4 if the distance function is lossy");
            scan->xs_orderbynulls[i] = true;
        }
    }
}

index_vacuum_cleanup()

IndexBulkDeleteResult* index_vacuum_cleanup	(	IndexVacuumInfo *	info,
		IndexBulkDeleteResult *	stats
	)

Definition at line 703 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().

{
    Relation    indexRelation = info->index;

    RELATION_CHECKS;
    CHECK_REL_PROCEDURE(amvacuumcleanup);

    return indexRelation->rd_indam->amvacuumcleanup(info, stats);
}