syscache.c

关系型数据库 Postgresql 6.5.2

/*-------------------------------------------------------------------------
 *
 * syscache.c
 *	  System cache management routines
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *	  $Header: /usr/local/cvsroot/pgsql/src/backend/utils/cache/syscache.c,v 1.28.2.1 1999/08/02 05:25:01 scrappy Exp $
 *
 * NOTES
 *	  These routines allow the parser/planner/executor to perform
 *	  rapid lookups on the contents of the system catalogs.
 *
 *	  see catalog/syscache.h for a list of the cache id's
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"

#include "access/heapam.h"
#include "catalog/catname.h"
#include "catalog/pg_aggregate.h"
#include "catalog/pg_amop.h"
#include "catalog/pg_group.h"
#include "catalog/pg_index.h"
#include "catalog/pg_inherits.h"
#include "catalog/pg_language.h"
#include "catalog/pg_listener.h"
#include "catalog/pg_opclass.h"
#include "catalog/pg_operator.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_rewrite.h"
#include "catalog/pg_shadow.h"
#include "catalog/pg_type.h"
#include "utils/catcache.h"

extern bool AMI_OVERRIDE;		/* XXX style */

#include "utils/syscache.h"
#include "catalog/indexing.h"

typedef HeapTuple (*ScanFunc) ();

/* ----------------
 *		Warning:  cacheinfo[] below is changed, then be sure and
 *		update the magic constants in syscache.h!
 * ----------------
 */
static struct cachedesc cacheinfo[] = {
	{AccessMethodOperatorRelationName,	/* AMOPOPID */
		3,
		{
			Anum_pg_amop_amopclaid,
			Anum_pg_amop_amopopr,
			Anum_pg_amop_amopid,
			0
		},
		sizeof(FormData_pg_amop),
		NULL,
	(ScanFunc) NULL},
	{AccessMethodOperatorRelationName,	/* AMOPSTRATEGY */
		3,
		{
			Anum_pg_amop_amopid,
			Anum_pg_amop_amopclaid,
			Anum_pg_amop_amopstrategy,
			0
		},
		sizeof(FormData_pg_amop),
		NULL,
	(ScanFunc) NULL},
	{AttributeRelationName,		/* ATTNAME */
		2,
		{
			Anum_pg_attribute_attrelid,
			Anum_pg_attribute_attname,
			0,
			0
		},
		ATTRIBUTE_TUPLE_SIZE,
		AttributeNameIndex,
	(ScanFunc) AttributeNameIndexScan},
	{AttributeRelationName,		/* ATTNUM */
		2,
		{
			Anum_pg_attribute_attrelid,
			Anum_pg_attribute_attnum,
			0,
			0
		},
		ATTRIBUTE_TUPLE_SIZE,
		AttributeNumIndex,
	(ScanFunc) AttributeNumIndexScan},
	{IndexRelationName,			/* INDEXRELID */
		1,
		{
			Anum_pg_index_indexrelid,
			0,
			0,
			0
		},
		offsetof(FormData_pg_index, indpred),
		NULL,
	NULL},
	{LanguageRelationName,		/* LANNAME */
		1,
		{
			Anum_pg_language_lanname,
			0,
			0,
			0
		},
		offsetof(FormData_pg_language, lancompiler),
		NULL,
	NULL},
	{OperatorRelationName,		/* OPRNAME */
		4,
		{
			Anum_pg_operator_oprname,
			Anum_pg_operator_oprleft,
			Anum_pg_operator_oprright,
			Anum_pg_operator_oprkind
		},
		sizeof(FormData_pg_operator),
		NULL,
	NULL},
	{OperatorRelationName,		/* OPROID */
		1,
		{
			ObjectIdAttributeNumber,
			0,
			0,
			0
		},
		sizeof(FormData_pg_operator),
		NULL,
	(ScanFunc) NULL},
	{ProcedureRelationName,		/* PRONAME */
		3,
		{
			Anum_pg_proc_proname,
			Anum_pg_proc_pronargs,
			Anum_pg_proc_proargtypes,
			0
		},
		offsetof(FormData_pg_proc, prosrc),
		ProcedureNameIndex,
	(ScanFunc) ProcedureNameIndexScan},
	{ProcedureRelationName,		/* PROOID */
		1,
		{
			ObjectIdAttributeNumber,
			0,
			0,
			0
		},
		offsetof(FormData_pg_proc, prosrc),
		ProcedureOidIndex,
	(ScanFunc) ProcedureOidIndexScan},
	{RelationRelationName,		/* RELNAME */
		1,
		{
			Anum_pg_class_relname,
			0,
			0,
			0
		},
		CLASS_TUPLE_SIZE,
		ClassNameIndex,
	(ScanFunc) ClassNameIndexScan},
	{RelationRelationName,		/* RELOID */
		1,
		{
			ObjectIdAttributeNumber,
			0,
			0,
			0
		},
		CLASS_TUPLE_SIZE,
		ClassOidIndex,
	(ScanFunc) ClassOidIndexScan},
	{TypeRelationName,			/* TYPNAME */
		1,
		{
			Anum_pg_type_typname,
			0,
			0,
			0
		},
		offsetof(FormData_pg_type, typalign) +sizeof(char),
		TypeNameIndex,
	TypeNameIndexScan},
	{TypeRelationName,			/* TYPOID */
		1,
		{
			ObjectIdAttributeNumber,
			0,
			0,
			0
		},
		offsetof(FormData_pg_type, typalign) +sizeof(char),
		TypeOidIndex,
	TypeOidIndexScan},
	{AccessMethodRelationName,	/* AMNAME */
		1,
		{
			Anum_pg_am_amname,
			0,
			0,
			0
		},
		sizeof(FormData_pg_am),
		NULL,
	NULL},
	{OperatorClassRelationName, /* CLANAME */
		1,
		{
			Anum_pg_opclass_opcname,
			0,
			0,
			0
		},
		sizeof(FormData_pg_opclass),
		NULL,
	NULL},
	{IndexRelationName,			/* INDRELIDKEY *//* never used */
		2,
		{
			Anum_pg_index_indrelid,
			Anum_pg_index_indkey,
			0,
			0
		},
		offsetof(FormData_pg_index, indpred),
		NULL,
	(ScanFunc) NULL},
	{InheritsRelationName,		/* INHRELID */
		2,
		{
			Anum_pg_inherits_inhrel,
			Anum_pg_inherits_inhseqno,
			0,
			0
		},
		sizeof(FormData_pg_inherits),
		NULL,
	(ScanFunc) NULL},
	{RewriteRelationName,		/* RULOID */
		1,
		{
			ObjectIdAttributeNumber,
			0,
			0,
			0
		},
		offsetof(FormData_pg_rewrite, ev_qual),
		NULL,
	(ScanFunc) NULL},
	{AggregateRelationName,		/* AGGNAME */
		2,
		{
			Anum_pg_aggregate_aggname,
			Anum_pg_aggregate_aggbasetype,
			0,
			0
		},
		offsetof(FormData_pg_aggregate, agginitval1),
		NULL,
	(ScanFunc) NULL},
	{ListenerRelationName,		/* LISTENREL */
		2,
		{
			Anum_pg_listener_relname,
			Anum_pg_listener_pid,
			0,
			0
		},
		sizeof(FormData_pg_listener),
		NULL,
	(ScanFunc) NULL},
	{ShadowRelationName,		/* USENAME */
		1,
		{
			Anum_pg_shadow_usename,
			0,
			0,
			0
		},
		sizeof(FormData_pg_shadow),
		NULL,
	(ScanFunc) NULL},
	{ShadowRelationName,		/* USESYSID */
		1,
		{
			Anum_pg_shadow_usesysid,
			0,
			0,
			0
		},
		sizeof(FormData_pg_shadow),
		NULL,
	(ScanFunc) NULL},
	{GroupRelationName,			/* GRONAME */
		1,
		{
			Anum_pg_group_groname,
			0,
			0,
			0
		},
		offsetof(FormData_pg_group, grolist[0]),
		NULL,
	(ScanFunc) NULL},
	{GroupRelationName,			/* GROSYSID */
		1,
		{
			Anum_pg_group_grosysid,
			0,
			0,
			0
		},
		offsetof(FormData_pg_group, grolist[0]),
		NULL,
	(ScanFunc) NULL},
	{RewriteRelationName,		/* REWRITENAME */
		1,
		{
			Anum_pg_rewrite_rulename,
			0,
			0,
			0
		},
		offsetof(FormData_pg_rewrite, ev_qual),
		NULL,
	(ScanFunc) NULL},
	{ProcedureRelationName,		/* PROSRC */
		1,
		{
			Anum_pg_proc_prosrc,
			0,
			0,
			0
		},
		offsetof(FormData_pg_proc, prosrc),
		ProcedureSrcIndex,
	(ScanFunc) ProcedureSrcIndexScan},
	{OperatorClassRelationName, /* CLADEFTYPE */
		1,
		{
			Anum_pg_opclass_opcdeftype,
			0,
			0,
			0
		},
		sizeof(FormData_pg_opclass),
		NULL,
	(ScanFunc) NULL},
	{LanguageRelationName,		/* LANOID */
		1,
		{
			ObjectIdAttributeNumber,
			0,
			0,
			0
		},
		offsetof(FormData_pg_language, lancompiler),
		NULL,
	NULL}
};