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Install some slightly realistic cost estimation for bitmap index scans.

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This commit is contained in:
Tom Lane
2005-04-21 02:28:02 +00:00
parent 2f8c7c866c
commit e6f7edb9d5
8 changed files with 195 additions and 31 deletions
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10
src/backend/optimizer/path/orindxpath.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/path/orindxpath.c,v 1.67 2005/03/27 06:29:36 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/path/orindxpath.c,v 1.68 2005/04/21 02:28:01 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -353,7 +353,7 @@ best_or_subclause_index(Query *root,
IndexOptInfo *index = (IndexOptInfo *) lfirst(ilist);
List *indexclauses;
List *indexquals;
Path subclause_path;
IndexPath subclause_path;
/*
* Ignore partial indexes that do not match the query. If predOK
@@ -402,13 +402,13 @@ best_or_subclause_index(Query *root,
cost_index(&subclause_path, root, index, indexquals, false);
if (!found || subclause_path.total_cost < *retTotalCost)
if (!found || subclause_path.path.total_cost < *retTotalCost)
{
*retIndexInfo = index;
*retIndexClauses = flatten_clausegroups_list(indexclauses);
*retIndexQuals = indexquals;
*retStartupCost = subclause_path.startup_cost;
*retTotalCost = subclause_path.total_cost;
*retStartupCost = subclause_path.path.startup_cost;
*retTotalCost = subclause_path.path.total_cost;
found = true;
}
}