Changeset: 4535ac77094f for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=4535ac77094f
Modified Files:
gdk/gdk_join.c
Branch: default
Log Message:
Don't swap join operands in mergejoin.
diffs (17 lines):
diff --git a/gdk/gdk_join.c b/gdk/gdk_join.c
--- a/gdk/gdk_join.c
+++ b/gdk/gdk_join.c
@@ -3356,11 +3356,8 @@ BATjoin(BAT **r1p, BAT **r2p, BAT *l, BA
return mergejoin_void(r2, r1, r, l, sr, sl, 0, 0, t0);
} else if ((BATordered(l) || BATordered_rev(l)) &&
(BATordered(r) || BATordered_rev(r))) {
- /* both sorted, smallest on left */
- if (BATcount(l) <= BATcount(r))
- return mergejoin(r1, r2, l, r, sl, sr, nil_matches, 0,
0, 0, maxsize, t0, 0);
- else
- return mergejoin(r2, r1, r, l, sr, sl, nil_matches, 0,
0, 0, maxsize, t0, 1);
+ /* both sorted */
+ return mergejoin(r1, r2, l, r, sl, sr, nil_matches, 0, 0, 0,
maxsize, t0, 0);
} else if (lhash && rhash) {
/* both have hash, smallest on right */
swap = lcount < rcount;
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