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/*-------------------------------------------------------------------------
*
* relcache.h
* Relation descriptor cache definitions.
*
*
* Portions Copyright (c) 1996-2004, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/relcache.h,v 1.44 2004/08/29 04:13:11 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef RELCACHE_H
#define RELCACHE_H
#include "utils/rel.h"
/*
* relation lookup routines
*/
extern Relation RelationIdGetRelation(Oid relationId);
extern Relation RelationSysNameGetRelation(const char *relationName);
/* finds an existing cache entry, but won't make a new one */
extern Relation RelationIdCacheGetRelation(Oid relationId);
extern void RelationClose(Relation relation);
/*
* Routines to compute/retrieve additional cached information
*/
extern List *RelationGetIndexList(Relation relation);
extern List *RelationGetIndexExpressions(Relation relation);
extern List *RelationGetIndexPredicate(Relation relation);
extern void RelationSetIndexList(Relation relation, List *indexIds);
extern void RelationInitIndexAccessInfo(Relation relation);
/*
* Routines for backend startup
*/
extern void RelationCacheInitialize(void);
extern void RelationCacheInitializePhase2(void);
extern void RelationCacheInitializePhase3(void);
/*
* Routine to create a relcache entry for an about-to-be-created relation
*/
extern Relation RelationBuildLocalRelation(const char *relname,
Oid relnamespace,
TupleDesc tupDesc,
Oid relid,
Oid reltablespace,
bool shared_relation,
bool nailit);
/*
* Routines for flushing/rebuilding relcache entries in various scenarios
*/
extern void RelationForgetRelation(Oid rid);
extern void RelationCacheInvalidateEntry(Oid relationId, RelFileNode *rnode);
extern void RelationCacheInvalidate(void);
extern void AtEOXact_RelationCache(bool isCommit);
extern void AtEOSubXact_RelationCache(bool isCommit, TransactionId myXid,
TransactionId parentXid);
/*
* Routines to help manage rebuilding of relcache init file
*/
extern bool RelationIdIsInInitFile(Oid relationId);
extern void RelationCacheInitFileInvalidate(bool beforeSend);
/* should be used only by relcache.c and catcache.c */
extern bool criticalRelcachesBuilt;
#endif /* RELCACHE_H */
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