Update of /cvsroot/monetdb/pathfinder/compiler/algebra
In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv5053/algebra
Modified Files:
algebra.c
Log Message:
-- Add rewrites for thetajoins:
* remove thetajoin with a one-row literal table and
* replace thetajoin by eqjoin if the join behaves like a mapping join.
U algebra.c
Index: algebra.c
===================================================================
RCS file: /cvsroot/monetdb/pathfinder/compiler/algebra/algebra.c,v
retrieving revision 1.102
retrieving revision 1.103
diff -u -d -r1.102 -r1.103
--- algebra.c 9 Feb 2009 08:29:37 -0000 1.102
+++ algebra.c 9 Mar 2009 14:48:12 -0000 1.103
@@ -606,6 +606,23 @@
}
/**
+ * Create a projection list based on a schema. The new projection
+ * list will be as wide as the upper projection (@a upper_count).
+ */
+PFalg_proj_t *
+PFalg_proj_create (PFalg_schema_t schema)
+{
+ unsigned int i;
+ PFalg_proj_t *proj = PFmalloc (schema.count * sizeof (*(proj)));
+
+ for (i = 0; i < schema.count; i++) {
+ proj[i] = PFalg_proj (schema.items[i].name,
+ schema.items[i].name);
+ }
+ return proj;
+}
+
+/**
* Constructor for column lists (e.g., for literal table
* construction, or sort specifications in the rownum operator).
*
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