Merge for BUG#3759 which was missing from the main tree for some reason.

BitKeeper/etc/logging_ok:
  auto-union
sql/item_cmpfunc.h:
  Auto merged
mysql-test/r/select.result:
  Merge for BUG#3759
mysql-test/t/select.test:
  Merge for BUG#3759

1 files changed, 22 insertions, 1 deletions

diff --git a/mysql-test/t/select.test b/mysql-test/t/select.test
index 11b3ae6aed1..f897703789b 100644
--- a/mysql-test/t/select.test
+++ b/mysql-test/t/select.test
@@ -1887,4 +1887,25 @@ explain select * from t1 left join t2 on a=c where d in (4);
 select * from t1 left join t2 on a=c where d in (4);
 explain select * from t1 left join t2 on a=c where d = 4;
 select * from t1 left join t2 on a=c where d = 4;
-drop table t1, t2;
\ No newline at end of file
+drop table t1, t2;R
+
+#
+# Covering index is mentioned in EXPLAIN output for const tables (bug #5333)
+#
+
+CREATE TABLE t1 (
+  i int(11) NOT NULL default '0',
+  c char(10) NOT NULL default '',
+  PRIMARY KEY  (i),
+  UNIQUE KEY c (c)
+) TYPE=MyISAM;
+
+INSERT INTO t1 VALUES (1,'a');
+INSERT INTO t1 VALUES (2,'b');
+INSERT INTO t1 VALUES (3,'c');
+
+EXPLAIN SELECT i FROM t1 WHERE i=1;
+
+EXPLAIN SELECT i FROM t1 WHERE i=1;
+
+DROP TABLE t1;