Update of /cvsroot/monetdb/pathfinder/compiler/algebra/opt
In directory
sc8-pr-cvs16.sourceforge.net:/tmp/cvs-serv11953/compiler/algebra/opt
Modified Files:
opt_const.c
Log Message:
-- Introduced a rewrite for the la_serialize_rel operator.
-- For plans that use the la_serialize_rel operator, we ensure (analogous to
the existing rewrite for la_serialize_seq) that attributes with constant values
are introduced at the latest possible point in the plan.
Index: opt_const.c
===================================================================
RCS file: /cvsroot/monetdb/pathfinder/compiler/algebra/opt/opt_const.c,v
retrieving revision 1.24
retrieving revision 1.25
diff -u -d -r1.24 -r1.25
--- opt_const.c 10 Dec 2007 15:10:00 -0000 1.24
+++ opt_const.c 13 Dec 2007 22:08:55 -0000 1.25
@@ -139,6 +139,48 @@
}
break;
+
+ case la_serialize_rel:
+
+ /* Introduce (superfluous) attach-ops for constant attributes.
+ This rewrite ensures, that constants are introduced at
+ the latest possible point in the plan.
+ */
+
+ /* Rewrite for the iter-attribute. */
+ if (PFprop_const_left (p->prop, p->sem.ser_rel.iter)) {
+ L(p) = add_attach (L(p), p->sem.ser_rel.iter,
+ PFprop_const_val_left (
+ p->prop,
+ p->sem.ser_rel.iter));
+
+ }
+
+ /* Rewrite for the pos-attribute. */
+ if (PFprop_const_left (p->prop, p->sem.ser_rel.pos)) {
+ L(p) = add_attach (L(p), p->sem.ser_rel.pos,
+ PFprop_const_val_left (
+ p->prop,
+ p->sem.ser_rel.pos));
+ }
+
+ /* Rewrite for the item-attributes. */
+ PFalg_attlist_t items = p->sem.ser_rel.items;
+ unsigned int count = items.count;
+ for (unsigned int i = 0; i < count; i++)
+ {
+ PFalg_att_t item = items.atts[i];
+ if (PFprop_const_left (p->prop, item)) {
+ L(p) = add_attach (L(p), item,
+ PFprop_const_val_left (
+ p->prop,
+ item));
+ }
+ }
+
+ break;
+
+
case la_eqjoin:
{ /**
* If both join columns are constant
-------------------------------------------------------------------------
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