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Remove the last traces of Joe Hellerstein's "xfunc" optimization. Patch

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from Alvaro Herrera. Also, removed lispsort.c, since it is no longer
used.
This commit is contained in:
Neil Conway
2004-04-25 18:23:57 +00:00
parent a3015829ee
commit 1812d3b233
8 changed files with 14 additions and 138 deletions
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13
src/backend/optimizer/util/pathnode.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/util/pathnode.c,v 1.103 2004/03/29 19:58:04 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/util/pathnode.c,v 1.104 2004/04/25 18:23:56 neilc Exp $
*
*-------------------------------------------------------------------------
*/
@ -243,9 +243,9 @@ set_cheapest(RelOptInfo *parent_rel)
* A path is worthy if it has either a better sort order (better pathkeys)
* or cheaper cost (on either dimension) than any of the existing old paths.
*
* Unless parent_rel->pruneable is false, we also remove from the rel's
* pathlist any old paths that are dominated by new_path --- that is,
* new_path is both cheaper and at least as well ordered.
* We also remove from the rel's pathlist any old paths that are dominated
* by new_path --- that is, new_path is both cheaper and at least as well
* ordered.
*
* The pathlist is kept sorted by TOTAL_COST metric, with cheaper paths
* at the front. No code depends on that for correctness; it's simply
@ -342,10 +342,9 @@ add_path(RelOptInfo *parent_rel, Path *new_path)
}
/*
* Remove current element from pathlist if dominated by new,
* unless xfunc told us not to remove any paths.
* Remove current element from pathlist if dominated by new.
*/
if (remove_old && parent_rel->pruneable)
if (remove_old)
{
List *p1_next = lnext(p1);