Update of /cvsroot/monetdb/pathfinder/compiler/algebra
In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv23847/algebra
Modified Files:
Tag: Nov2009
planner.c
Log Message:
-- Restrict heuristic to avoid blowing up the plan size.
Index: planner.c
===================================================================
RCS file: /cvsroot/monetdb/pathfinder/compiler/algebra/planner.c,v
retrieving revision 1.87.2.1
retrieving revision 1.87.2.2
diff -u -d -r1.87.2.1 -r1.87.2.2
--- planner.c 7 Oct 2009 13:44:12 -0000 1.87.2.1
+++ planner.c 18 Nov 2009 09:11:09 -0000 1.87.2.2
@@ -3976,8 +3976,11 @@
if we have only a small number of input orders.
(Choose 1000 as otherwise prune_plans() will have
to compare more than 1.000.000 orderings for each
- plan combination.) */
- if (PFord_set_count (p->orderings) < 1000)
+ plan combination.)
+ Furthermore ensure that we do not increase the plan space
+ if we already have a large number of possible plans. */
+ if (PFord_set_count (p->orderings) < 1000 &&
+ PFarray_last (plans) < 5000)
for (i = 0; i < PFord_set_count (orderings); i++) {
ord = PFord_set_at (orderings, i);
add_plans (plans, ensure_ordering (p, ord));
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