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Rework join-removal logic as per recent discussion. In particular this

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fixes things so that it works for cases where nested removals are possible.
The overhead of the optimization should be significantly less, as well.
This commit is contained in:
Tom Lane
2010-03-28 22:59:34 +00:00
parent a760893dbd
commit b78f6264eb
17 changed files with 585 additions and 317 deletions
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6
src/backend/optimizer/path/allpaths.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/path/allpaths.c,v 1.193 2010/02/26 02:00:44 momjian Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/path/allpaths.c,v 1.194 2010/03/28 22:59:32 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1396,10 +1396,6 @@ print_path(PlannerInfo *root, Path *path, int indent)
ptype = "Unique";
subpath = ((UniquePath *) path)->subpath;
break;
case T_NoOpPath:
ptype = "NoOp";
subpath = ((NoOpPath *) path)->subpath;
break;
case T_NestPath:
ptype = "NestLoop";
join = true;