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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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9
src/backend/commands/indexcmds.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/indexcmds.c,v 1.29 2000/06/15 03:32:07 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/indexcmds.c,v 1.30 2000/06/17 21:48:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -221,6 +221,13 @@ DefineIndex(char *heapRelationName,
lossy, unique, primary);
}
/*
* We update the relation's pg_class tuple even if it already has
* relhasindex = true. This is needed to cause a shared-cache-inval
* message to be sent for the pg_class tuple, which will cause other
* backends to flush their relcache entries and in particular their
* cached lists of the indexes for this relation.
*/
setRelhasindexInplace(relationId, true, false);
}