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-rw-r--r--mysql-test/t/merge.test13
1 files changed, 13 insertions, 0 deletions
diff --git a/mysql-test/t/merge.test b/mysql-test/t/merge.test
index 01ba8986474..c3bffa4f2fb 100644
--- a/mysql-test/t/merge.test
+++ b/mysql-test/t/merge.test
@@ -250,3 +250,16 @@ EXPLAIN SELECT * FROM t2 WHERE fileset_id = 2
AND file_code = '0000000115' LIMIT 1;
DROP TABLE t2, t1;
+#
+# Test of ORDER BY DESC on key (Bug #515)
+#
+
+create table t1 (x int, y int, index xy(x, y));
+create table t2 (x int, y int, index xy(x, y));
+create table t3 (x int, y int, index xy(x, y)) type=merge union=(t1,t2);
+insert into t1 values(1, 2);
+insert into t2 values(1, 3);
+select * from t3 where x = 1 and y < 5 order by y;
+# Bug is that followng query returns empty set while it must be same as above
+select * from t3 where x = 1 and y < 5 order by y desc;
+drop table t1,t2,t3;