Question

从下面的输出中可以看出，我正在使用MySQL shell将会话的wait_timeout变量更改为30秒。它有效。

但是，无论如何都要从命令行设置此变量吗？

$ mysql -u root -h 127.0.0.1 -p
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Your MySQL connection id is 48543
Server version: 5.6.39 MySQL Community Server (GPL)

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mysql> SHOW SESSION VARIABLES LIKE 'wait_timeout';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| wait_timeout  | 28800 |
+---------------+-------+
1 row in set (0.00 sec)

mysql> SET session wait_timeout=30;
Query OK, 0 rows affected (0.00 sec)

mysql> SHOW SESSION VARIABLES LIKE 'wait_timeout';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| wait_timeout  | 30    |
+---------------+-------+
1 row in set (0.00 sec)

mysql> select now() from dual;
+---------------------+
| now()               |
+---------------------+
| 2018-01-23 17:16:52 |
+---------------------+
1 row in set (0.00 sec)

mysql> select now() from dual;
ERROR 2013 (HY000): Lost connection to MySQL server during query

Answer 1

这样做：

$ mysql -u root -p -h 127.0.0.1 --init-command="SET SESSION wait_timeout=30"

如何从命令行设置MySQL会话wait_timeout？

1 个答案: