src/libpq/include/utils/syscache.h

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/*-------------------------------------------------------------------------
 *
 * syscache.h
 *        System catalog cache definitions.
 *
 * See also lsyscache.h, which provides convenience routines for
 * common cache-lookup operations.
 *
 * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * $PostgreSQL: pgsql/src/include/utils/syscache.h,v 1.61 2005/10/15 02:49:46 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef SYSCACHE_H
#define SYSCACHE_H

#include "access/htup.h"

/*
 *              Declarations for util/syscache.c.
 *
 *              SysCache identifiers.
 *
 *              The order of these must match the order
 *              they are entered into the structure cacheinfo[] in syscache.c.
 *              Keep them in alphabetical order.
 */

#define AGGFNOID                0
#define AMNAME                  1
#define AMOID                   2
#define AMOPOPID                3
#define AMOPSTRATEGY    4
#define AMPROCNUM               5
#define ATTNAME                 6
#define ATTNUM                  7
#define AUTHMEMMEMROLE  8
#define AUTHMEMROLEMEM  9
#define AUTHNAME                10
#define AUTHOID                 11
#define CASTSOURCETARGET 12
#define CLAAMNAMENSP    13
#define CLAOID                  14
#define CONDEFAULT              15
#define CONNAMENSP              16
#define CONOID                  17
#define INDEXRELID              18
#define INHRELID                19
#define LANGNAME                20
#define LANGOID                 21
#define NAMESPACENAME   22
#define NAMESPACEOID    23
#define OPERNAMENSP             24
#define OPEROID                 25
#define PROCNAMEARGSNSP 26
#define PROCOID                 27
#define RELNAMENSP              28
#define RELOID                  29
#define RULERELNAME             30
#define STATRELATT              31
#define TYPENAMENSP             32
#define TYPEOID                 33

extern void InitCatalogCache(void);
extern void InitCatalogCachePhase2(void);

extern HeapTuple SearchSysCache(int cacheId,
                           Datum key1, Datum key2, Datum key3, Datum key4);
extern void ReleaseSysCache(HeapTuple tuple);

/* convenience routines */
extern HeapTuple SearchSysCacheCopy(int cacheId,
                                   Datum key1, Datum key2, Datum key3, Datum key4);
extern bool SearchSysCacheExists(int cacheId,
                                         Datum key1, Datum key2, Datum key3, Datum key4);
extern Oid GetSysCacheOid(int cacheId,
                           Datum key1, Datum key2, Datum key3, Datum key4);

extern HeapTuple SearchSysCacheAttName(Oid relid, const char *attname);
extern HeapTuple SearchSysCacheCopyAttName(Oid relid, const char *attname);
extern bool SearchSysCacheExistsAttName(Oid relid, const char *attname);

extern Datum SysCacheGetAttr(int cacheId, HeapTuple tup,
                                AttrNumber attributeNumber, bool *isNull);

/* list-search interface.  Users of this must import catcache.h too */
extern struct catclist *SearchSysCacheList(int cacheId, int nkeys,
                                   Datum key1, Datum key2, Datum key3, Datum key4);

#define ReleaseSysCacheList(x)  ReleaseCatCacheList(x)

#endif   /* SYSCACHE_H */