1 files changed, 34 insertions, 0 deletions
diff --git a/mysql-test/t/func_str.test b/mysql-test/t/func_str.test
index 66b9eabd385..8942b0a2faf 100644
--- a/mysql-test/t/func_str.test
+++ b/mysql-test/t/func_str.test
@@ -1318,3 +1318,37 @@ insert into t1 values (-1),(null);
 explain select 1 as a from t1,(select decode(f1,f1) as b from t1) a;
 explain select 1 as a from t1,(select encode(f1,f1) as b from t1) a;
 drop table t1;
+
+--echo #
+--echo # Bug#49141: Encode function is significantly slower in 5.1 compared to 5.0
+--echo #
+
+--disable_warnings
+DROP TABLE IF EXISTS t1, t2;
+--enable_warnings
+
+CREATE TABLE t1 (a VARCHAR(20), b INT);
+CREATE TABLE t2 (a VARCHAR(20), b INT);
+
+INSERT INTO t1 VALUES ('ABC', 1);
+INSERT INTO t2 VALUES ('ABC', 1);
+
+SELECT DECODE((SELECT ENCODE('secret', t1.a) FROM t1,t2 WHERE t1.a = t2.a GROUP BY t1.b), t2.a)
+  FROM t1,t2 WHERE t1.b = t1.b > 0 GROUP BY t2.b;
+
+SELECT DECODE((SELECT ENCODE('secret', 'ABC') FROM t1,t2 WHERE t1.a = t2.a GROUP BY t1.b), t2.a)
+  FROM t1,t2 WHERE t1.b = t1.b > 0 GROUP BY t2.b;
+
+SELECT DECODE((SELECT ENCODE('secret', t1.a) FROM t1,t2 WHERE t1.a = t2.a GROUP BY t1.b), 'ABC')
+  FROM t1,t2 WHERE t1.b = t1.b > 0 GROUP BY t2.b;
+
+TRUNCATE TABLE t1;
+TRUNCATE TABLE t2;
+
+INSERT INTO t1 VALUES ('EDF', 3), ('BCD', 2), ('ABC', 1);
+INSERT INTO t2 VALUES ('EDF', 3), ('BCD', 2), ('ABC', 1);
+
+SELECT DECODE((SELECT ENCODE('secret', t1.a) FROM t1,t2 WHERE t1.a = t2.a GROUP BY t1.b LIMIT 1), t2.a)
+  FROM t2 WHERE t2.b = 1 GROUP BY t2.b;
+
+DROP TABLE t1, t2;