itemptr.c File Reference

#include "postgres.h"
#include "storage/itemptr.h"

Include dependency graph for itemptr.c:

Go to the source code of this file.

Functions
bool	ItemPointerEquals (ItemPointer pointer1, ItemPointer pointer2)
int32	ItemPointerCompare (ItemPointer arg1, ItemPointer arg2)

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Function Documentation

int32 ItemPointerCompare	(	ItemPointer	arg1,
		ItemPointer	arg2
	)

Definition at line 45 of file itemptr.c.

References BlockIdGetBlockNumber, ItemPointerData::ip_blkid, and ItemPointerData::ip_posid.

Referenced by _bt_check_unique(), bttidcmp(), tideq(), tidge(), tidgt(), tidlarger(), tidle(), tidlt(), tidne(), tidsmaller(), and validate_index_heapscan().

{
    /*
     * Don't use ItemPointerGetBlockNumber or ItemPointerGetOffsetNumber here,
     * because they assert ip_posid != 0 which might not be true for a
     * user-supplied TID.
     */
    BlockNumber b1 = BlockIdGetBlockNumber(&(arg1->ip_blkid));
    BlockNumber b2 = BlockIdGetBlockNumber(&(arg2->ip_blkid));

    if (b1 < b2)
        return -1;
    else if (b1 > b2)
        return 1;
    else if (arg1->ip_posid < arg2->ip_posid)
        return -1;
    else if (arg1->ip_posid > arg2->ip_posid)
        return 1;
    else
        return 0;
}

bool ItemPointerEquals	(	ItemPointer	pointer1,
		ItemPointer	pointer2
	)

Definition at line 29 of file itemptr.c.

References ItemPointerGetBlockNumber, and ItemPointerGetOffsetNumber.

Referenced by _bt_killitems(), check_exclusion_constraint(), collectMatchesForHeapRow(), compile_pltcl_function(), EvalPlanQualFetch(), ExecDelete(), ExecLockRows(), ExecUpdate(), GetTupleForTrigger(), gistplacetopage(), hashgettuple(), heap_get_latest_tid(), heap_lock_updated_tuple(), heap_lock_updated_tuple_rec(), lookup_C_func(), plpgsql_compile(), PLy_procedure_argument_valid(), PLy_procedure_valid(), processPendingPage(), rewrite_heap_tuple(), scanGetCandidate(), SearchCatCacheList(), spgAddPendingTID(), TidListCreate(), and validate_plperl_function().

{
    if (ItemPointerGetBlockNumber(pointer1) ==
        ItemPointerGetBlockNumber(pointer2) &&
        ItemPointerGetOffsetNumber(pointer1) ==
        ItemPointerGetOffsetNumber(pointer2))
        return true;
    else
        return false;
}