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91 lines
1.8 KiB
C
91 lines
1.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* indexvalid.c--
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* index tuple qualification validity checking code
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/access/common/Attic/indexvalid.c,v 1.16 1997/09/08 02:19:55 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include <postgres.h>
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#include <access/htup.h>
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#include <access/iqual.h>
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#include <access/itup.h>
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#include <access/skey.h>
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#include <executor/execdebug.h>
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/* ----------------------------------------------------------------
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* index scan key qualification code
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* ----------------------------------------------------------------
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*/
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int NIndexTupleProcessed;
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/* ----------------
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* index_keytest
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*
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* old comments
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* May eventually combine with other tests (like timeranges)?
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* Should have Buffer buffer; as an argument and pass it to amgetattr.
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* ----------------
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*/
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bool
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index_keytest(IndexTuple tuple,
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TupleDesc tupdesc,
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int scanKeySize,
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ScanKey key)
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{
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bool isNull;
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Datum datum;
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int test;
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IncrIndexProcessed();
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while (scanKeySize > 0)
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{
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datum = index_getattr(tuple,
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key[0].sk_attno,
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tupdesc,
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&isNull);
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if (isNull)
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{
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/* XXX eventually should check if SK_ISNULL */
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return (false);
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}
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if (key[0].sk_flags & SK_ISNULL)
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{
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return (false);
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}
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if (key[0].sk_flags & SK_COMMUTE)
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{
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test = (*(key[0].sk_func))
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(DatumGetPointer(key[0].sk_argument),
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datum) ? 1 : 0;
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}
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else
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{
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test = (*(key[0].sk_func))
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(datum,
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DatumGetPointer(key[0].sk_argument)) ? 1 : 0;
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}
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if (!test == !(key[0].sk_flags & SK_NEGATE))
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{
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return (false);
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}
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scanKeySize -= 1;
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key++;
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}
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return (true);
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}
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