mirror of
https://github.com/postgres/postgres.git
synced 2026-02-21 00:40:20 -05:00
d03a933ec5
discussion of 5/19/00). pg_index is now searched for indexes of a relation using an indexscan. Moreover, this is done once and cached in the relcache entry for the relation, in the form of a list of OIDs for the indexes. This list is used by the parser and executor to drive lookups in the pg_index syscache when they want to know the properties of the indexes. Net result: index information will be fully cached for repetitive operations such as inserts.
55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* relcache.h
|
|
* Relation descriptor cache definitions.
|
|
*
|
|
*
|
|
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* $Id: relcache.h,v 1.20 2000/06/17 21:49:04 tgl Exp $
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#ifndef RELCACHE_H
|
|
#define RELCACHE_H
|
|
|
|
#include "utils/rel.h"
|
|
|
|
/*
|
|
* relation lookup routines
|
|
*/
|
|
extern Relation RelationIdGetRelation(Oid relationId);
|
|
extern Relation RelationNameGetRelation(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);
|
|
extern void RelationForgetRelation(Oid rid);
|
|
|
|
/*
|
|
* Routines to compute/retrieve additional cached information
|
|
*/
|
|
extern List *RelationGetIndexList(Relation relation);
|
|
|
|
/*
|
|
* Routines for flushing/rebuilding relcache entries in various scenarios
|
|
*/
|
|
extern void RelationIdInvalidateRelationCacheByRelationId(Oid relationId);
|
|
|
|
extern void RelationCacheInvalidate(void);
|
|
|
|
extern void RelationRegisterRelation(Relation relation);
|
|
extern void RelationPurgeLocalRelation(bool xactComitted);
|
|
extern void RelationInitialize(void);
|
|
|
|
extern void RelationCacheAbort(void);
|
|
|
|
/*
|
|
* both vacuum.c and relcache.c need to know the name of the relcache init file
|
|
*/
|
|
|
|
#define RELCACHE_INIT_FILENAME "pg_internal.init"
|
|
|
|
#endif /* RELCACHE_H */
|