`date_add` and `date_sub` are incompatible with Mysql

[qw4990]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do?
   If possible, provide a recipe for reproducing the error.

select date_add("1997-12-31 23:59:59",INTERVAL "1:1" DAY_HOUR);
select date_add("1997-12-31 23:59:59",INTERVAL "1 1" YEAR_MONTH);
select date_sub("1998-01-01 00:00:00",INTERVAL "1:1" DAY_HOUR);
select date_sub("1998-01-01 00:00:00",INTERVAL "1 1" YEAR_MONTH);

2. What did you expect to see?
   In Mysql

mysql> select date_add("1997-12-31 23:59:59",INTERVAL "1:1" DAY_HOUR);
+---------------------------------------------------------+
| date_add("1997-12-31 23:59:59",INTERVAL "1:1" DAY_HOUR) |
+---------------------------------------------------------+
| 1998-01-02 00:59:59                                     |
+---------------------------------------------------------+
1 row in set (0.00 sec)

mysql> select date_add("1997-12-31 23:59:59",INTERVAL "1 1" YEAR_MONTH);
+-----------------------------------------------------------+
| date_add("1997-12-31 23:59:59",INTERVAL "1 1" YEAR_MONTH) |
+-----------------------------------------------------------+
| 1999-01-31 23:59:59                                       |
+-----------------------------------------------------------+
1 row in set (0.00 sec)

mysql> select date_sub("1998-01-01 00:00:00",INTERVAL "1:1" DAY_HOUR);
+---------------------------------------------------------+
| date_sub("1998-01-01 00:00:00",INTERVAL "1:1" DAY_HOUR) |
+---------------------------------------------------------+
| 1997-12-30 23:00:00                                     |
+---------------------------------------------------------+
1 row in set (0.00 sec)

mysql> select date_sub("1998-01-01 00:00:00",INTERVAL "1 1" YEAR_MONTH);
+-----------------------------------------------------------+
| date_sub("1998-01-01 00:00:00",INTERVAL "1 1" YEAR_MONTH) |
+-----------------------------------------------------------+
| 1996-12-01 00:00:00                                       |
+-----------------------------------------------------------+
1 row in set (0.00 sec)

3. What did you see instead?
   In TiDB

mysql> select date_add("1997-12-31 23:59:59",INTERVAL "1:1" DAY_HOUR);
+---------------------------------------------------------+
| date_add("1997-12-31 23:59:59",INTERVAL "1:1" DAY_HOUR) |
+---------------------------------------------------------+
| NULL                                                    |
+---------------------------------------------------------+
1 row in set, 1 warning (0.00 sec)

mysql> select date_add("1997-12-31 23:59:59",INTERVAL "1 1" YEAR_MONTH);
+-----------------------------------------------------------+
| date_add("1997-12-31 23:59:59",INTERVAL "1 1" YEAR_MONTH) |
+-----------------------------------------------------------+
| NULL                                                      |
+-----------------------------------------------------------+
1 row in set, 1 warning (0.00 sec)

mysql> select date_sub("1998-01-01 00:00:00",INTERVAL "1:1" DAY_HOUR);
+---------------------------------------------------------+
| date_sub("1998-01-01 00:00:00",INTERVAL "1:1" DAY_HOUR) |
+---------------------------------------------------------+
| NULL                                                    |
+---------------------------------------------------------+
1 row in set, 1 warning (0.00 sec)

mysql> select date_sub("1998-01-01 00:00:00",INTERVAL "1 1" YEAR_MONTH);
+-----------------------------------------------------------+
| date_sub("1998-01-01 00:00:00",INTERVAL "1 1" YEAR_MONTH) |
+-----------------------------------------------------------+
| NULL                                                      |
+-----------------------------------------------------------+
1 row in set, 1 warning (0.00 sec)

4. What version of TiDB are you using (tidb-server -V or run select tidb_version(); on TiDB)?

mysql> select tidb_version();
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| tidb_version()                                                                                                                                                                                                                                                                                                                     |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Release Version: v3.0.0-beta-212-g0681b8125
Git Commit Hash: 0681b8125080045ee0d4747ce61923164c6f2dd1
Git Branch: master
UTC Build Time: 2019-03-14 04:39:19
GoVersion: go version go1.12 darwin/amd64
Race Enabled: false
TiKV Min Version: 2.1.0-alpha.1-ff3dd160846b7d1aed9079c389fc188f7f5ea13e
Check Table Before Drop: false |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)