检查当前的FOREIGN_KEY_CHECKS值 [英] Check current FOREIGN_KEY_CHECKS value

问题描述

如何检查FOREIGN_KEY_CHECKS的当前值是什么?

How can I check what the current value of FOREIGN_KEY_CHECKS is?

我想确保该值为1.

推荐答案

检查 更新

mysql> SELECT VERSION();
+-----------+
| VERSION() |
+-----------+
| 5.7.18    |
+-----------+
1 row in set (0.00 sec)

mysql> SELECT IF((SELECT `VARIABLE_VALUE`
    -> FROM `performance_schema`.`global_variables`
    -> WHERE `VARIABLE_NAME` = 'foreign_key_checks') = 'ON', 1, 0) `global.foreign_key_checks`,
    -> IF((SELECT `VARIABLE_VALUE`
    -> FROM `performance_schema`.`session_variables`
    -> WHERE `VARIABLE_NAME` = 'foreign_key_checks') = 'ON', 1, 0) `session.foreign_key_checks`;
+---------------------------+----------------------------+
| global.foreign_key_checks | session.foreign_key_checks |
+---------------------------+----------------------------+
|                         1 |                          1 |
+---------------------------+----------------------------+
1 row in set (0.00 sec)

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