Bug #21564557: INCONSISTENT OUTPUT FROM 5.5 AND 5.6

               UNIX_TIMESTAMP(STR_TO_DATE('201506', "%Y%M"

Issue:
-----
When an invalid date is supplied to the UNIX_TIMESTAMP
function from STR_TO_DATE, no check is performed before
converting it to a timestamp value.

SOLUTION:
---------
Add the check_date function and only if it succeeds,
proceed to the timestamp conversion.

No warning will be returned for dates having zero in
month/date, since partial dates are allowed. UNIX_TIMESTAMP
will return only a zero for such values.

The problem has been handled in 5.6+ with WL#946.

1 files changed, 18 insertions, 0 deletions

diff --git a/mysql-test/t/func_time.test b/mysql-test/t/func_time.test
index b6c70485dbc..3abfdc616ff 100644
--- a/mysql-test/t/func_time.test
+++ b/mysql-test/t/func_time.test
@@ -1026,3 +1026,21 @@ create table t1(a time);
 insert into t1 values ('00:00:00'),('00:01:00');
 select 1 from t1 where 1 < some (select cast(a as datetime) from t1);
 drop table t1;
+
+--echo #
+--echo # Bug #21564557: INCONSISTENT OUTPUT FROM 5.5 AND 5.6
+--echo #                UNIX_TIMESTAMP(STR_TO_DATE('201506', "%Y%M"
+--echo #
+
+SELECT UNIX_TIMESTAMP(STR_TO_DATE('201506', "%Y%m"));
+SELECT UNIX_TIMESTAMP('2015-06-00');
+SELECT UNIX_TIMESTAMP(STR_TO_DATE('0000-00-00 10:30:30', '%Y-%m-%d %h:%i:%s'));
+
+set sql_mode= 'TRADITIONAL';
+SELECT @@sql_mode;
+
+SELECT UNIX_TIMESTAMP(STR_TO_DATE('201506', "%Y%m"));
+SELECT UNIX_TIMESTAMP('2015-06-00');
+SELECT UNIX_TIMESTAMP(STR_TO_DATE('0000-00-00 10:30:30', '%Y-%m-%d %h:%i:%s'));
+
+set sql_mode= default;