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e26c539e9f
The purpose of this change is to eliminate the need for every caller of SearchSysCache, SearchSysCacheCopy, SearchSysCacheExists, GetSysCacheOid, and SearchSysCacheList to know the maximum number of allowable keys for a syscache entry (currently 4). This will make it far easier to increase the maximum number of keys in a future release should we choose to do so, and it makes the code shorter, too. Design and review by Tom Lane.
169 lines
4.9 KiB
C
169 lines
4.9 KiB
C
/*-------------------------------------------------------------------------
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*
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* syscache.h
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* System catalog cache definitions.
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*
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* See also lsyscache.h, which provides convenience routines for
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* common cache-lookup operations.
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*
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* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/utils/syscache.h,v 1.79 2010/02/14 18:42:18 rhaas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef SYSCACHE_H
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#define SYSCACHE_H
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#include "utils/catcache.h"
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/*
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* SysCache identifiers.
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*
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* The order of these identifiers must match the order
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* of the entries in the array cacheinfo[] in syscache.c.
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* Keep them in alphabetical order (renumbering only costs a
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* backend rebuild).
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*/
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enum SysCacheIdentifier
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{
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AGGFNOID = 0,
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AMNAME,
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AMOID,
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AMOPOPID,
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AMOPSTRATEGY,
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AMPROCNUM,
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ATTNAME,
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ATTNUM,
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AUTHMEMMEMROLE,
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AUTHMEMROLEMEM,
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AUTHNAME,
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AUTHOID,
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CASTSOURCETARGET,
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CLAAMNAMENSP,
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CLAOID,
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CONDEFAULT,
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CONNAMENSP,
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CONSTROID,
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CONVOID,
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DATABASEOID,
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DEFACLROLENSPOBJ,
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ENUMOID,
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ENUMTYPOIDNAME,
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FOREIGNDATAWRAPPERNAME,
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FOREIGNDATAWRAPPEROID,
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FOREIGNSERVERNAME,
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FOREIGNSERVEROID,
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INDEXRELID,
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LANGNAME,
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LANGOID,
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NAMESPACENAME,
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NAMESPACEOID,
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OPERNAMENSP,
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OPEROID,
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OPFAMILYAMNAMENSP,
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OPFAMILYOID,
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PROCNAMEARGSNSP,
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PROCOID,
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RELNAMENSP,
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RELOID,
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RULERELNAME,
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STATRELATTINH,
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TABLESPACEOID,
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TSCONFIGMAP,
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TSCONFIGNAMENSP,
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TSCONFIGOID,
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TSDICTNAMENSP,
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TSDICTOID,
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TSPARSERNAMENSP,
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TSPARSEROID,
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TSTEMPLATENAMENSP,
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TSTEMPLATEOID,
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TYPENAMENSP,
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TYPEOID,
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USERMAPPINGOID,
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USERMAPPINGUSERSERVER
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};
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extern void InitCatalogCache(void);
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extern void InitCatalogCachePhase2(void);
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extern HeapTuple SearchSysCache(int cacheId,
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Datum key1, Datum key2, Datum key3, Datum key4);
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extern void ReleaseSysCache(HeapTuple tuple);
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/* convenience routines */
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extern HeapTuple SearchSysCacheCopy(int cacheId,
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Datum key1, Datum key2, Datum key3, Datum key4);
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extern bool SearchSysCacheExists(int cacheId,
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Datum key1, Datum key2, Datum key3, Datum key4);
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extern Oid GetSysCacheOid(int cacheId,
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Datum key1, Datum key2, Datum key3, Datum key4);
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extern HeapTuple SearchSysCacheAttName(Oid relid, const char *attname);
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extern HeapTuple SearchSysCacheCopyAttName(Oid relid, const char *attname);
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extern bool SearchSysCacheExistsAttName(Oid relid, const char *attname);
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extern Datum SysCacheGetAttr(int cacheId, HeapTuple tup,
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AttrNumber attributeNumber, bool *isNull);
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/* list-search interface. Users of this must import catcache.h too */
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extern struct catclist *SearchSysCacheList(int cacheId, int nkeys,
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Datum key1, Datum key2, Datum key3, Datum key4);
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/*
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* The use of the macros below rather than direct calls to the corresponding
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* functions is encouraged, as it insulates the caller from changes in the
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* maximum number of keys.
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*/
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#define SearchSysCache1(cacheId, key1) \
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SearchSysCache(cacheId, key1, 0, 0, 0)
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#define SearchSysCache2(cacheId, key1, key2) \
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SearchSysCache(cacheId, key1, key2, 0, 0)
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#define SearchSysCache3(cacheId, key1, key2, key3) \
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SearchSysCache(cacheId, key1, key2, key3, 0)
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#define SearchSysCache4(cacheId, key1, key2, key3, key4) \
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SearchSysCache(cacheId, key1, key2, key3, key4)
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#define SearchSysCacheCopy1(cacheId, key1) \
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SearchSysCacheCopy(cacheId, key1, 0, 0, 0)
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#define SearchSysCacheCopy2(cacheId, key1, key2) \
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SearchSysCacheCopy(cacheId, key1, key2, 0, 0)
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#define SearchSysCacheCopy3(cacheId, key1, key2, key3) \
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SearchSysCacheCopy(cacheId, key1, key2, key3, 0)
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#define SearchSysCacheCopy4(cacheId, key1, key2, key3, key4) \
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SearchSysCacheCopy(cacheId, key1, key2, key3, key4)
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#define SearchSysCacheExists1(cacheId, key1) \
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SearchSysCacheExists(cacheId, key1, 0, 0, 0)
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#define SearchSysCacheExists2(cacheId, key1, key2) \
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SearchSysCacheExists(cacheId, key1, key2, 0, 0)
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#define SearchSysCacheExists3(cacheId, key1, key2, key3) \
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SearchSysCacheExists(cacheId, key1, key2, key3, 0)
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#define SearchSysCacheExists4(cacheId, key1, key2, key3, key4) \
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SearchSysCacheExists(cacheId, key1, key2, key3, key4)
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#define GetSysCacheOid1(cacheId, key1) \
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GetSysCacheOid(cacheId, key1, 0, 0, 0)
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#define GetSysCacheOid2(cacheId, key1, key2) \
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GetSysCacheOid(cacheId, key1, key2, 0, 0)
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#define GetSysCacheOid3(cacheId, key1, key2, key3) \
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GetSysCacheOid(cacheId, key1, key2, key3, 0)
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#define GetSysCacheOid4(cacheId, key1, key2, key3, key4) \
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GetSysCacheOid(cacheId, key1, key2, key3, key4)
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#define SearchSysCacheList1(cacheId, key1) \
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SearchSysCacheList(cacheId, 1, key1, 0, 0, 0)
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#define SearchSysCacheList2(cacheId, key1, key2) \
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SearchSysCacheList(cacheId, 2, key1, key2, 0, 0)
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#define SearchSysCacheList3(cacheId, key1, key2, key3) \
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SearchSysCacheList(cacheId, 3, key1, key2, key3, 0)
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#define SearchSysCacheList4(cacheId, key1, key2, key3, key4) \
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SearchSysCacheList(cacheId, 4, key1, key2, key3, key4)
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#define ReleaseSysCacheList(x) ReleaseCatCacheList(x)
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#endif /* SYSCACHE_H */
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