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/*-------------------------------------------------------------------------
*
* rel.c--
* POSTGRES relation descriptor code.
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/Attic/rel.c,v 1.1.1.1 1996/07/09 06:22:06 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
/* #define RELREFDEBUG 1 */
#include "postgres.h"
#include "miscadmin.h"
#include "access/istrat.h"
#include "access/tupdesc.h"
#include "utils/rel.h"
#include "storage/fd.h"
/*
* RelationIsValid is now a macro in rel.h -cim 4/27/91
*
* Many of the RelationGet...() functions are now macros in rel.h
* -mer 3/2/92
*/
/*
* RelationGetIndexStrategy --
* Returns index strategy for a relation.
*
* Note:
* Assumes relation descriptor is valid.
* Assumes relation descriptor is for an index relation.
*/
IndexStrategy
RelationGetIndexStrategy(Relation relation)
{
return relation->rd_istrat;
}
/*
* RelationSetIndexSupport --
* Sets index strategy and support info for a relation.
*
* Note:
* Assumes relation descriptor is a valid pointer to sufficient space.
* Assumes index strategy is valid. Assumes support is valid if non-
* NULL.
*/
/* ----------------
* RelationSetIndexSupport
*
* This routine saves two pointers -- one to the IndexStrategy, and
* one to the RegProcs that support the indexed access method. These
* pointers are stored in the space following the attribute data in the
* reldesc.
*
* NEW: the index strategy and support are now stored in real fields
* at the end of the structure - jolly
* ----------------
*/
void
RelationSetIndexSupport(Relation relation,
IndexStrategy strategy,
RegProcedure *support)
{
Assert(PointerIsValid(relation));
Assert(IndexStrategyIsValid(strategy));
relation->rd_istrat = strategy;
relation->rd_support = support;
}
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