Update of /cvsroot/monetdb/pathfinder/compiler/algebra/prop
In directory sc8-pr-cvs7.sourceforge.net:/tmp/cvs-serv21716/algebra/prop
Modified Files:
prop_reqval.c
Log Message:
-- Fixed bug in opt/opt_const.c
-- Extended domain based optimization with a case for semijoin operators
(Copied the two rules in opt_dom.c to opt_complex.c to save some phases.)
-- Extended pattern for equi-join rewrites: If the cardinality does not matter
we may even forget self-joins.
-- Extended optimization based on required values: We now look one operator
ahead thus trying to bridge union operators if both input relations generate
constant required value columns with different values.
Index: prop_reqval.c
===================================================================
RCS file: /cvsroot/monetdb/pathfinder/compiler/algebra/prop/prop_reqval.c,v
retrieving revision 1.18
retrieving revision 1.19
diff -u -d -r1.18 -r1.19
--- prop_reqval.c 14 Feb 2007 10:01:23 -0000 1.18
+++ prop_reqval.c 21 Feb 2007 14:25:06 -0000 1.19
@@ -202,6 +202,10 @@
case la_select:
/* introduce new required value column */
+ n->prop->reqvals.name = union_ (n->prop->reqvals.name,
+ n->sem.select.att);
+ n->prop->reqvals.val = union_ (n->prop->reqvals.val,
+ n->sem.select.att);
rv.name = union_ (rv.name, n->sem.select.att);
rv.val = union_ (rv.val, n->sem.select.att);
prop_infer_reqvals (L(n), rv);
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