mysql - How can I see the specific value of the sql_mode?

Question

There are some sql_mode values in MySQL:

ANSI,

IGNORE_SPACE,

STRICT_TRANS_TABLES, etc

How can I see the one particular value? The manual says:

You can retrieve the current mode by issuing a SELECT @@sql_mode statement.

But it just shows nothing, just one blank field in a table with @@sql_mode as a column name.

Answer 1

It's only blank for you because you have not set the sql_mode. If you set it, then that query will show you the details:

mysql> SELECT @@sql_mode;
+------------+
| @@sql_mode |
+------------+
|            |
+------------+
1 row in set (0.00 sec)

mysql> set sql_mode=ORACLE;
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT @@sql_mode;
+----------------------------------------------------------------------------------------------------------------------+
| @@sql_mode                                                                                                           |
+----------------------------------------------------------------------------------------------------------------------+
| PIPES_AS_CONCAT,ANSI_QUOTES,IGNORE_SPACE,ORACLE,NO_KEY_OPTIONS,NO_TABLE_OPTIONS,NO_FIELD_OPTIONS,NO_AUTO_CREATE_USER |
+----------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)