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/*-------------------------------------------------------------------------
*
* istrat.h--
* POSTGRES index strategy definitions.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: istrat.h,v 1.1.1.1 1996/07/09 06:21:08 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef ISTRAT_H
#define ISTRAT_H
#include "postgres.h"
#include "access/attnum.h"
#include "access/skey.h"
#include "access/strat.h"
#include "utils/rel.h" /* for Relation */
/*
* StrategyNumberIsValid --
* True iff the strategy number is valid.
*/
#define StrategyNumberIsValid(strategyNumber) \
((bool) ((strategyNumber) != InvalidStrategy))
/*
* StrategyNumberIsInBounds --
* True iff strategy number is within given bounds.
*
* Note:
* Assumes StrategyNumber is an unsigned type.
* Assumes the bounded interval to be (0,max].
*/
#define StrategyNumberIsInBounds(strategyNumber, maxStrategyNumber) \
((bool)(InvalidStrategy < (strategyNumber) && \
(strategyNumber) <= (maxStrategyNumber)))
/*
* StrategyMapIsValid --
* True iff the index strategy mapping is valid.
*/
#define StrategyMapIsValid(map) PointerIsValid(map)
/*
* IndexStrategyIsValid --
* True iff the index strategy is valid.
*/
#define IndexStrategyIsValid(s) PointerIsValid(s)
extern ScanKey StrategyMapGetScanKeyEntry(StrategyMap map,
StrategyNumber strategyNumber);
extern StrategyMap IndexStrategyGetStrategyMap(IndexStrategy indexStrategy,
StrategyNumber maxStrategyNum, AttrNumber attrNum);
extern Size
AttributeNumberGetIndexStrategySize(AttrNumber maxAttributeNumber,
StrategyNumber maxStrategyNumber);
extern bool StrategyOperatorIsValid(StrategyOperator operator,
StrategyNumber maxStrategy);
extern bool StrategyTermIsValid(StrategyTerm term,
StrategyNumber maxStrategy);
extern bool StrategyExpressionIsValid(StrategyExpression expression,
StrategyNumber maxStrategy);
extern bool StrategyEvaluationIsValid(StrategyEvaluation evaluation);
extern StrategyNumber RelationGetStrategy(Relation relation,
AttrNumber attributeNumber, StrategyEvaluation evaluation,
RegProcedure procedure);
extern bool RelationInvokeStrategy(Relation relation,
StrategyEvaluation evaluation, AttrNumber attributeNumber,
StrategyNumber strategy, Datum left, Datum right);
extern void IndexSupportInitialize(IndexStrategy indexStrategy,
RegProcedure *indexSupport, Oid indexObjectId,
Oid accessMethodObjectId, StrategyNumber maxStrategyNumber,
StrategyNumber maxSupportNumber, AttrNumber maxAttributeNumber);
#endif /* ISTRAT_H */
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