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cases. Operator classes now exist within "operator families". While most families are equivalent to a single class, related classes can be grouped into one family to represent the fact that they are semantically compatible. Cross-type operators are now naturally adjunct parts of a family, without having to wedge them into a particular opclass as we had done originally. This commit restructures the catalogs and cleans up enough of the fallout so that everything still works at least as well as before, but most of the work needed to actually improve the planner's behavior will come later. Also, there are not yet CREATE/DROP/ALTER OPERATOR FAMILY commands; the only way to create a new family right now is to allow CREATE OPERATOR CLASS to make one by default. I owe some more documentation work, too. But that can all be done in smaller pieces once this infrastructure is in place.
97 lines
2.8 KiB
C
97 lines
2.8 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) 1996-2006, 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 1.66 2006/12/23 00:43:13 tgl 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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* Declarations for util/syscache.c.
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*
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* SysCache identifiers.
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*
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* The order of these must match the order
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* they are entered into the structure cacheinfo[] in syscache.c.
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* Keep them in alphabetical order.
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*/
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#define AGGFNOID 0
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#define AMNAME 1
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#define AMOID 2
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#define AMOPOPID 3
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#define AMOPSTRATEGY 4
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#define AMPROCNUM 5
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#define ATTNAME 6
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#define ATTNUM 7
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#define AUTHMEMMEMROLE 8
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#define AUTHMEMROLEMEM 9
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#define AUTHNAME 10
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#define AUTHOID 11
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#define CASTSOURCETARGET 12
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#define CLAAMNAMENSP 13
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#define CLAOID 14
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#define CONDEFAULT 15
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#define CONNAMENSP 16
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#define CONOID 17
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#define DATABASEOID 18
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#define INDEXRELID 19
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#define LANGNAME 20
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#define LANGOID 21
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#define NAMESPACENAME 22
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#define NAMESPACEOID 23
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#define OPERNAMENSP 24
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#define OPEROID 25
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#define OPFAMILYAMNAMENSP 26
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#define OPFAMILYOID 27
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#define PROCNAMEARGSNSP 28
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#define PROCOID 29
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#define RELNAMENSP 30
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#define RELOID 31
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#define RULERELNAME 32
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#define STATRELATT 33
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#define TYPENAMENSP 34
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#define TYPEOID 35
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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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#define ReleaseSysCacheList(x) ReleaseCatCacheList(x)
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#endif /* SYSCACHE_H */
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