f933766ba7
pgsql-hackers. pg_opclass now has a row for each opclass supported by each index AM, not a row for each opclass name. This allows pg_opclass to show directly whether an AM supports an opclass, and furthermore makes it possible to store additional information about an opclass that might be AM-dependent. pg_opclass and pg_amop now store "lossy" and "haskeytype" information that we previously expected the user to remember to provide in CREATE INDEX commands. Lossiness is no longer an index-level property, but is associated with the use of a particular operator in a particular index opclass. Along the way, IndexSupportInitialize now uses the syscaches to retrieve pg_amop and pg_amproc entries. I find this reduces backend launch time by about ten percent, at the cost of a couple more special cases in catcache.c's IndexScanOK. Initial work by Oleg Bartunov and Teodor Sigaev, further hacking by Tom Lane. initdb forced.
77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* syscache.h
|
|
* System catalog cache definitions.
|
|
*
|
|
* See also lsyscache.h, which provides convenience routines for
|
|
* common cache-lookup operations.
|
|
*
|
|
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* $Id: syscache.h,v 1.33 2001/08/21 16:36:06 tgl 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 AGGNAME 0
|
|
#define AMNAME 1
|
|
#define AMOPOPID 2
|
|
#define AMOPSTRATEGY 3
|
|
#define AMPROCNUM 4
|
|
#define ATTNAME 5
|
|
#define ATTNUM 6
|
|
#define CLAAMNAME 7
|
|
#define CLAOID 8
|
|
#define GRONAME 9
|
|
#define GROSYSID 10
|
|
#define INDEXRELID 11
|
|
#define INHRELID 12
|
|
#define LANGNAME 13
|
|
#define LANGOID 14
|
|
#define OPERNAME 15
|
|
#define OPEROID 16
|
|
#define PROCNAME 17
|
|
#define PROCOID 18
|
|
#define RELNAME 19
|
|
#define RELOID 20
|
|
#define RULENAME 21
|
|
#define SHADOWNAME 22
|
|
#define SHADOWSYSID 23
|
|
#define STATRELATT 24
|
|
#define TYPENAME 25
|
|
#define TYPEOID 26
|
|
|
|
extern void InitCatalogCache(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 Datum SysCacheGetAttr(int cacheId, HeapTuple tup,
|
|
AttrNumber attributeNumber, bool *isNull);
|
|
|
|
#endif /* SYSCACHE_H */
|