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/*-------------------------------------------------------------------------
*
* hashstrat.c
* Srategy map entries for the hash indexed access method
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/hash/Attic/hashstrat.c,v 1.19 2001/10/25 05:49:21 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/hash.h"
/*
* only one valid strategy for hash tables: equality.
*/
#ifdef NOT_USED
static StrategyNumber HTNegate[HTMaxStrategyNumber] = {
InvalidStrategy
};
static StrategyNumber HTCommute[HTMaxStrategyNumber] = {
HTEqualStrategyNumber
};
static StrategyNumber HTNegateCommute[HTMaxStrategyNumber] = {
InvalidStrategy
};
static StrategyExpression HTEvaluationExpressions[HTMaxStrategyNumber] = {
NULL
};
static StrategyEvaluationData HTEvaluationData = {
HTMaxStrategyNumber,
(StrategyTransformMap) HTNegate,
(StrategyTransformMap) HTCommute,
(StrategyTransformMap) HTNegateCommute,
HTEvaluationExpressions
};
#endif
/* ----------------------------------------------------------------
* RelationGetHashStrategy
* ----------------------------------------------------------------
*/
#ifdef NOT_USED
static StrategyNumber
_hash_getstrat(Relation rel,
AttrNumber attno,
RegProcedure proc)
{
StrategyNumber strat;
strat = RelationGetStrategy(rel, attno, &HTEvaluationData, proc);
Assert(StrategyNumberIsValid(strat));
return strat;
}
#endif
#ifdef NOT_USED
static bool
_hash_invokestrat(Relation rel,
AttrNumber attno,
StrategyNumber strat,
Datum left,
Datum right)
{
return (RelationInvokeStrategy(rel, &HTEvaluationData, attno, strat,
left, right));
}
#endif
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