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/*-------------------------------------------------------------------------
*
* btstrat.c--
* Srategy map entries for the btree indexed access method
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/hash/Attic/hashstrat.c,v 1.5 1996/10/31 08:24:45 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#include <time.h>
#include "postgres.h"
#include "catalog/pg_attribute.h"
#include "access/attnum.h"
#include "nodes/nodes.h"
#include "nodes/pg_list.h"
#include "access/tupdesc.h"
#include "storage/fd.h"
#include "catalog/pg_am.h"
#include "catalog/pg_class.h"
#include "nodes/nodes.h"
#include "rewrite/prs2lock.h"
#include "access/skey.h"
#include "access/strat.h"
#include "utils/rel.h"
#include "storage/block.h"
#include "storage/off.h"
#include "storage/itemptr.h"
#include "utils/nabstime.h"
#include "access/htup.h"
#include "access/itup.h"
#include "storage/itemid.h"
#include "storage/item.h"
#include "storage/buf.h"
#include "storage/page.h"
#include "storage/bufpage.h"
#include "access/sdir.h"
#include "access/funcindex.h"
#include "utils/tqual.h"
#include "access/relscan.h"
#include "access/hash.h"
#include "access/istrat.h"
/*
* only one valid strategy for hash tables: equality.
*/
static StrategyNumber HTNegate[1] = {
InvalidStrategy
};
static StrategyNumber HTCommute[1] = {
HTEqualStrategyNumber
};
static StrategyNumber HTNegateCommute[1] = {
InvalidStrategy
};
static StrategyEvaluationData HTEvaluationData = {
/* XXX static for simplicity */
HTMaxStrategyNumber,
(StrategyTransformMap)HTNegate,
(StrategyTransformMap)HTCommute,
(StrategyTransformMap)HTNegateCommute,
{NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL}
};
/* ----------------------------------------------------------------
* RelationGetHashStrategy
* ----------------------------------------------------------------
*/
StrategyNumber
_hash_getstrat(Relation rel,
AttrNumber attno,
RegProcedure proc)
{
StrategyNumber strat;
strat = RelationGetStrategy(rel, attno, &HTEvaluationData, proc);
Assert(StrategyNumberIsValid(strat));
return (strat);
}
bool
_hash_invokestrat(Relation rel,
AttrNumber attno,
StrategyNumber strat,
Datum left,
Datum right)
{
return (RelationInvokeStrategy(rel, &HTEvaluationData, attno, strat,
left, right));
}
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