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Fix performance problems with pg_index lookups (see, for example,

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discussion of 5/19/00).  pg_index is now searched for indexes of a
relation using an indexscan.  Moreover, this is done once and cached
in the relcache entry for the relation, in the form of a list of OIDs
for the indexes.  This list is used by the parser and executor to drive
lookups in the pg_index syscache when they want to know the properties
of the indexes.  Net result: index information will be fully cached
for repetitive operations such as inserts.
This commit is contained in:
Tom Lane
2000-06-17 21:49:04 +00:00
parent 9cf80f2f55
commit d03a933ec5
13 changed files with 389 additions and 525 deletions
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26
src/include/utils/rel.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: rel.h,v 1.36 2000/04/12 17:16:55 momjian Exp $
* $Id: rel.h,v 1.37 2000/06/17 21:49:02 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -92,14 +92,15 @@ typedef struct RelationData
bool rd_isnailed; /* rel is nailed in cache */
bool rd_isnoname; /* rel has no name */
bool rd_unlinked; /* rel already unlinked or not created yet */
bool rd_indexfound; /* true if rd_indexlist is valid */
Form_pg_am rd_am; /* AM tuple */
Form_pg_class rd_rel; /* RELATION tuple */
Oid rd_id; /* relation's object id */
LockInfoData rd_lockInfo; /* lock manager's info for locking
* relation */
List *rd_indexlist; /* list of OIDs of indexes on relation */
LockInfoData rd_lockInfo; /* lock mgr's info for locking relation */
TupleDesc rd_att; /* tuple descriptor */
RuleLock *rd_rules; /* rewrite rules */
IndexStrategy rd_istrat;
IndexStrategy rd_istrat; /* info needed if rel is an index */
RegProcedure *rd_support;
TriggerDesc *trigdesc; /* Trigger info, or NULL if rel has none */
} RelationData;
@@ -138,13 +139,15 @@ typedef Relation *RelationPtr;
* RelationSetReferenceCount
* Sets relation reference count.
*/
#define RelationSetReferenceCount(relation,count) ((relation)->rd_refcnt = (count))
#define RelationSetReferenceCount(relation,count) \
((relation)->rd_refcnt = (count))
/*
* RelationIncrementReferenceCount
* Increments relation reference count.
*/
#define RelationIncrementReferenceCount(relation) ((relation)->rd_refcnt += 1)
#define RelationIncrementReferenceCount(relation) \
((relation)->rd_refcnt += 1)
/*
* RelationDecrementReferenceCount
@@ -199,7 +202,8 @@ typedef Relation *RelationPtr;
*
* Returns a Relation Name
*/
#define RelationGetPhysicalRelationName(relation) (NameStr((relation)->rd_rel->relname))
#define RelationGetPhysicalRelationName(relation) \
(NameStr((relation)->rd_rel->relname))
/*
* RelationGetNumberOfAttributes
@@ -224,9 +228,11 @@ typedef Relation *RelationPtr;
*/
#define RelationGetIndexStrategy(relation) ((relation)->rd_istrat)
/*
* Routines in utils/cache/rel.c
*/
extern void RelationSetIndexSupport(Relation relation,
IndexStrategy strategy,
RegProcedure *support);
IndexStrategy strategy,
RegProcedure *support);
#endif /* REL_H */