Can't be negative the value of NAME_CONST.

[SunRunAway]

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.

Can't be negative the value of NAME_CONST.

mysql> SELECT NAME_CONST( 'come', -1 );

mysql> SELECT NAME_CONST( 'come', -1.0 );

2. What did you expect to see?

+------+
| come |
+------+
|   -1 |
+------+
1 row in set (0.00 sec)

+------+
| come |
+------+
| -1.0 |
+------+
1 row in set (0.00 sec)

3. What did you see instead?

ERROR 1210 (HY000): Incorrect arguments to NAME_CONST

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

fdbc149

[b41sh]

/assign