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/*-------------------------------------------------------------------------
*
* istrat.h
* POSTGRES index strategy definitions.
*
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: istrat.h,v 1.26 2002/09/04 20:31:37 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef ISTRAT_H
#define ISTRAT_H
#include "utils/rel.h"
/*
* 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 StrategyNumber RelationGetStrategy(Relation relation,
AttrNumber attributeNumber, StrategyEvaluation evaluation,
RegProcedure procedure);
#endif /* ISTRAT_H */
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