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/*-------------------------------------------------------------------------
*
* indexvalid.c
* index tuple qualification validity checking code
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/common/Attic/indexvalid.c,v 1.28 2002/06/20 20:29:24 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/iqual.h"
#include "executor/execdebug.h"
/* ----------------------------------------------------------------
* index scan key qualification code
* ----------------------------------------------------------------
*/
int NIndexTupleProcessed;
/* ----------------
* index_keytest - does this index tuple satisfy the scan key(s)?
* ----------------
*/
bool
index_keytest(IndexTuple tuple,
TupleDesc tupdesc,
int scanKeySize,
ScanKey key)
{
IncrIndexProcessed();
while (scanKeySize > 0)
{
Datum datum;
bool isNull;
Datum test;
datum = index_getattr(tuple,
key->sk_attno,
tupdesc,
&isNull);
if (isNull)
{
/* XXX eventually should check if SK_ISNULL */
return false;
}
if (key->sk_flags & SK_ISNULL)
return false;
if (key->sk_flags & SK_COMMUTE)
test = FunctionCall2(&key->sk_func, key->sk_argument, datum);
else
test = FunctionCall2(&key->sk_func, datum, key->sk_argument);
if (DatumGetBool(test) == !!(key->sk_flags & SK_NEGATE))
return false;
key++;
scanKeySize--;
}
return true;
}
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