SESSION_VARIABLES
SESSION_VARIABLES 表提供关于会话变量的信息。该表的数据类似于 SHOW SESSION VARIABLES 语句的结果。
USE INFORMATION_SCHEMA;
DESC SESSION_VARIABLES;输出结果如下：
+----------------+---------------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------------+---------------+------+------+---------+-------+
| VARIABLE_NAME | varchar(64) | YES | | NULL | |
| VARIABLE_VALUE | varchar(1024) | YES | | NULL | |
+----------------+---------------+------+------+---------+-------+
2 rows in set (0.00 sec)查询 SESSION_VARIABLES 表的前 10 行：
SELECT * FROM SESSION_VARIABLES ORDER BY variable_name LIMIT 10;输出结果如下：
+-----------------------------------+------------------+
| VARIABLE_NAME | VARIABLE_VALUE |
+-----------------------------------+------------------+
| allow_auto_random_explicit_insert | OFF |
| auto_increment_increment | 1 |
| auto_increment_offset | 1 |
| autocommit | ON |
| automatic_sp_privileges | 1 |
| avoid_temporal_upgrade | OFF |
| back_log | 80 |
| basedir | /usr/local/mysql |
| big_tables | OFF |
| bind_address | * |
+-----------------------------------+------------------+
10 rows in set (0.00 sec)SESSION_VARIABLES 表中列的描述如下：
VARIABLE_NAME：数据库中会话级变量的名称。VARIABLE_VALUE：数据库中会话级变量的值。