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Clean up cost_sort some more: most callers were double-counting

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the cost of reading the source data.
This commit is contained in:
Tom Lane
1999-05-01 19:47:42 +00:00
parent 87d95ca04d
commit 605d84941d
4 changed files with 20 additions and 26 deletions
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7
src/backend/optimizer/path/joinpath.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinpath.c,v 1.33 1999/04/03 00:18:28 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinpath.c,v 1.34 1999/05/01 19:47:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -348,7 +348,7 @@ match_unsorted_outer(RelOptInfo *joinrel,
(mergeinnerpath->path_cost <
(cheapest_inner->path_cost +
cost_sort(matchedJoinKeys, innerrel->size,
innerrel->width, false))));
innerrel->width))));
if (!path_is_cheaper_than_sort)
{
varkeys = make_pathkeys_from_joinkeys(matchedJoinKeys,
@ -464,8 +464,7 @@ match_unsorted_inner(RelOptInfo *joinrel,
if (clauses && matchedJoinKeys)
{
temp1 = outerrel->cheapestpath->path_cost +
cost_sort(matchedJoinKeys, outerrel->size, outerrel->width,
false);
cost_sort(matchedJoinKeys, outerrel->size, outerrel->width);
temp2 = (bool) (FLOAT_IS_ZERO(innerpath->outerjoincost)
|| (innerpath->outerjoincost > temp1));