Changeset: 41fc8f7f9258 for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=41fc8f7f9258
Modified Files:
MonetDB/src/gdk/gdk_relop.mx
Branch: Jun2010
Log Message:
batjoin(): produce empty result if either join column is void-NIL
diffs (18 lines):
diff -r 4f8530d6c7f9 -r 41fc8f7f9258 MonetDB/src/gdk/gdk_relop.mx
--- a/MonetDB/src/gdk/gdk_relop.mx Wed Aug 11 10:03:56 2010 +0200
+++ b/MonetDB/src/gdk/gdk_relop.mx Wed Aug 11 10:05:33 2010 +0200
@@ -1246,10 +1246,12 @@
lcount = BATcount(l);
rcount = BATcount(r);
- if (lcount == 0 || rcount == 0) {
+ if (lcount == 0 || rcount == 0 ||
+ (l->ttype == TYPE_void && l->tseqbase == oid_nil) ||
+ (r->htype == TYPE_void && r->hseqbase == oid_nil)) {
BAT *bn;
- @:return_empty_join_result(l,r, BATjoin: |l|==0 or |r|==0,0)@
+ @:return_empty_join_result(l,r, BATjoin: |l|==0 or |r|==0 or
tail(l)==NIL or head(r)==NIL,0)@
}
@-
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