Merge mysql.com:/home/gluh/MySQL/Merge/5.1

into  mysql.com:/home/gluh/MySQL/Merge/5.1-opt

1 files changed, 24 insertions, 0 deletions

diff --git a/mysql-test/t/group_min_max.test b/mysql-test/t/group_min_max.test
index 9d1e065797d..7ec7e58ee19 100644
--- a/mysql-test/t/group_min_max.test
+++ b/mysql-test/t/group_min_max.test
@@ -914,7 +914,31 @@ SELECT SQL_BIG_RESULT DISTINCT(a) FROM t1;
 
 DROP TABLE t1;
 
+#
+# Bug #32268: Indexed queries give bogus MIN and MAX results
+#
+
+CREATE TABLE t1 (a INT, b INT);
+INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3);
+INSERT INTO t1 SELECT a + 1, b FROM t1;
+INSERT INTO t1 SELECT a + 2, b FROM t1;
 
+EXPLAIN
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
 
+CREATE INDEX break_it ON t1 (a, b);
 
+EXPLAIN
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
 
+EXPLAIN
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
+
+EXPLAIN
+SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
+SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
+
+DROP TABLE t1;