`timestampadd` is not compatible 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.

CREATE TABLE t1 (datetime datetime, timestamp timestamp, date date, time time);
INSERT INTO t1 values ("2001-01-02 03:04:05", "2002-01-02 03:04:05", "2003-01-02", "06:07:08");
select timestampadd(WEEK, 1, date) from t1;

2. What did you expect to see?
   In Mysql

mysql> CREATE TABLE t1 (datetime datetime, timestamp timestamp, date date, time time);
Query OK, 0 rows affected (0.01 sec)

mysql> INSERT INTO t1 values ("2001-01-02 03:04:05", "2002-01-02 03:04:05", "2003-01-02", "06:07:08");
Query OK, 1 row affected (0.00 sec)

mysql> select timestampadd(WEEK, 1, date) from t1;
+-----------------------------+
| timestampadd(WEEK, 1, date) |
+-----------------------------+
| 2003-01-09                  |
+-----------------------------+
1 row in set (0.00 sec)

3. What did you see instead?
   In TiDB

mysql> CREATE TABLE t1 (datetime datetime, timestamp timestamp, date date, time time);
Query OK, 0 rows affected (0.01 sec)

mysql> INSERT INTO t1 values ("2001-01-02 03:04:05", "2002-01-02 03:04:05", "2003-01-02", "06:07:08");
Query OK, 1 row affected (0.01 sec)

mysql> select timestampadd(WEEK, 1, date) from t1;
+-----------------------------+
| timestampadd(WEEK, 1, date) |
+-----------------------------+
| 2003-01-09 00:00:00         |
+-----------------------------+
1 row in set (0.00 sec

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

+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| 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 |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+