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7bddca3450
equality checks it applies, instead of a random dependence on whatever operators might be named "=". The equality operators will now be selected from the opfamily of the unique index that the FK constraint depends on to enforce uniqueness of the referenced columns; therefore they are certain to be consistent with that index's notion of equality. Among other things this should fix the problem noted awhile back that pg_dump may fail for foreign-key constraints on user-defined types when the required operators aren't in the search path. This also means that the former warning condition about "foreign key constraint will require costly sequential scans" is gone: if the comparison condition isn't indexable then we'll reject the constraint entirely. All per past discussions. Along the way, make the RI triggers look into pg_constraint for their information, instead of using pg_trigger.tgargs; and get rid of the always error-prone fixed-size string buffers in ri_triggers.c in favor of building up the RI queries in StringInfo buffers. initdb forced due to columns added to pg_constraint and pg_trigger.
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) 1996-2007, 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 1.68 2007/02/14 01:58:58 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 CONSTROID 17
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#define CONVOID 18
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#define DATABASEOID 19
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#define INDEXRELID 20
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#define LANGNAME 21
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#define LANGOID 22
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#define NAMESPACENAME 23
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#define NAMESPACEOID 24
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#define OPERNAMENSP 25
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#define OPEROID 26
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#define OPFAMILYAMNAMENSP 27
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#define OPFAMILYOID 28
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#define PROCNAMEARGSNSP 29
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#define PROCOID 30
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#define RELNAMENSP 31
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#define RELOID 32
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#define RULERELNAME 33
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#define STATRELATT 34
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#define TYPENAMENSP 35
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#define TYPEOID 36
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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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