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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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5
src/include/executor/executor.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: executor.h,v 1.43 2000/05/29 01:59:11 tgl Exp $
* $Id: executor.h,v 1.44 2000/06/17 21:48:56 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -142,8 +142,7 @@ extern void ExecAssignScanTypeFromOuterPlan(Plan *node,
CommonScanState *csstate);
extern Form_pg_attribute ExecGetTypeInfo(Relation relDesc);
extern void ExecOpenIndices(Oid resultRelationOid,
RelationInfo *resultRelationInfo);
extern void ExecOpenIndices(RelationInfo *resultRelationInfo);
extern void ExecCloseIndices(RelationInfo *resultRelationInfo);
extern void ExecInsertIndexTuples(TupleTableSlot *slot, ItemPointer tupleid,
EState *estate, bool is_update);