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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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4
src/backend/executor/execMain.c
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@ -27,7 +27,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.117 2000/06/15 04:09:50 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.118 2000/06/17 21:48:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -735,7 +735,7 @@ InitPlan(CmdType operation, Query *parseTree, Plan *plan, EState *estate)
*/
if (resultRelationDesc->rd_rel->relhasindex &&
operation != CMD_DELETE)
ExecOpenIndices(resultRelationOid, resultRelationInfo);
ExecOpenIndices(resultRelationInfo);
estate->es_result_relation_info = resultRelationInfo;
}