syscache.h 2.18 KB
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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
 * common cache-lookup operations.
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 *
 * Copyright (c) 1994, Regents of the University of California
 *
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 * $Id: syscache.h,v 1.23 2000/01/23 03:43:22 tgl Exp $
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 *
 *-------------------------------------------------------------------------
 */
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#ifndef SYSCACHE_H
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#define SYSCACHE_H

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#include "access/htup.h"
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 /* #define CACHEDEBUG *//* turns DEBUG elogs on */
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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
 *		they are entered into the structure cacheinfo[] in syscache.c
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 *		Keep them in alphabeticall order.
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 */

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#define AGGNAME			0
#define AMNAME			1
#define AMOPOPID		2
#define AMOPSTRATEGY	3
#define ATTNAME			4
#define ATTNUM			5
#define CLADEFTYPE		6
#define CLANAME			7
#define GRONAME			8
#define GROSYSID		9
#define INDEXRELID		10
#define INHRELID		11
#define LANGNAME		12
#define LANGOID			13
#define LISTENREL		14
#define OPERNAME		15
#define OPEROID			16
#define PROCNAME		17
#define PROCOID			18
#define RELNAME			19
#define RELOID			20
#define RULENAME		21
#define RULEOID			22
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#define SHADOWNAME		23
#define SHADOWSYSID		24
#define STATRELID		25
#define TYPENAME		26
#define TYPEOID			27
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/* ----------------
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 *		struct cachedesc:		information needed for a call to InitSysCache()
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 * ----------------
 */
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struct cachedesc
{
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	char	   *name;			/* this is Name so that we can initialize
								 * it */
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	int			nkeys;
	int			key[4];
	int			size;			/* sizeof(appropriate struct) */
	char	   *indname;		/* index relation for this cache, if
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								 * exists */
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	HeapTuple	(*iScanFunc) ();/* function to handle index scans */
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};

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extern void zerocaches(void);
extern void InitCatalogCache(void);
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extern HeapTuple SearchSysCacheTupleCopy(int cacheId,
						Datum key1, Datum key2, Datum key3, Datum key4);
extern HeapTuple SearchSysCacheTuple(int cacheId,
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					Datum key1, Datum key2, Datum key3, Datum key4);
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extern Datum SysCacheGetAttr(int cacheId, HeapTuple tup,
							 AttrNumber attributeNumber,
							 bool *isnull);
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#endif	 /* SYSCACHE_H */