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Improve the plan cache invalidation mechanism to make it invalidate plans

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when user-defined functions used in a plan are modified.  Also invalidate
plans when schemas, operators, or operator classes are modified; but for these
cases we just invalidate everything rather than tracking exact dependencies,
since these types of objects seldom change in a production database.

Tom Lane; loosely based on a patch by Martin Pihlak.
This commit is contained in:
Tom Lane
2008-09-09 18:58:09 +00:00
parent c06629c72e
commit ee33b95d9c
18 changed files with 522 additions and 275 deletions
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4
src/backend/optimizer/plan/planner.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planner.c,v 1.242 2008/08/17 01:19:59 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planner.c,v 1.243 2008/09/09 18:58:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -140,6 +140,7 @@ standard_planner(Query *parse, int cursorOptions, ParamListInfo boundParams)
glob->rewindPlanIDs = NULL;
glob->finalrtable = NIL;
glob->relationOids = NIL;
glob->invalItems = NIL;
glob->transientPlan = false;
/* Determine what fraction of the plan is likely to be scanned */
@ -213,6 +214,7 @@ standard_planner(Query *parse, int cursorOptions, ParamListInfo boundParams)
result->returningLists = root->returningLists;
result->rowMarks = parse->rowMarks;
result->relationOids = glob->relationOids;
result->invalItems = glob->invalItems;
result->nParamExec = list_length(glob->paramlist);
return result;