Update of /cvsroot/monetdb/pathfinder/compiler/sql
In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv5967/sql
Modified Files:
lalg2sql.brg
Log Message:
-- Generate the selectivity clauses more selectively.
U lalg2sql.brg
Index: lalg2sql.brg
===================================================================
RCS file: /cvsroot/monetdb/pathfinder/compiler/sql/lalg2sql.brg,v
retrieving revision 1.156
retrieving revision 1.157
diff -u -d -r1.156 -r1.157
--- lalg2sql.brg 16 Feb 2009 16:25:51 -0000 1.156
+++ lalg2sql.brg 9 Mar 2009 15:00:20 -0000 1.157
@@ -1091,6 +1091,15 @@
eq (LEVEL(ctx), LEVEL(step)));
}
+static bool
+is_step (PFla_op_t *p)
+{
+ return p->kind == la_step ||
+ p->kind == la_guide_step ||
+ p->kind == la_step_join ||
+ p->kind == la_guide_step_join;
+}
+
static void
step_axis (PFla_op_t *p, PFsql_aident_t ctx, PFsql_aident_t step,
PFalg_axis_t axis, PFsql_t *fragment, int level_in)
@@ -1118,7 +1127,7 @@
case alg_chld:
/* attribute axis */
case alg_attr:
- if (selectivity) {
+ if (selectivity && is_step (p)) {
if ((level_in == 0 || level_in == 1) &&
/* check for steps from a single document */
L(p)->kind == la_frag_union &&
@@ -1152,7 +1161,7 @@
/* descendant-or-self axis */
case alg_desc_s:
- if (selectivity) {
+ if (selectivity && is_step (p)) {
if ((level_in == 0 || level_in == 1) &&
/* check for steps from a single document */
L(p)->kind == la_frag_union &&
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