SHOW DIST VARIABLE 语法用于查询 PROXY 系统变量配置
ShowDistVariable ::=
'SHOW' ('VARIABLES'|'VARIABLE' 'NAME' '=' variableName)
variableName ::=
identifier
| 列 | 说明 |
|---|---|
| variable_name | 系统变量名称 |
| variable_value | 系统变量值 |
vairableName 时，默认查询所有 PROXY 系统变量配置PROXY 系统变量配置SHOW DIST VARIABLES;
mysql> SHOW DIST VARIABLES;
+---------------------------------------+----------------+
| variable_name | variable_value |
+---------------------------------------+----------------+
| sql_show | false |
| sql_simple | false |
| kernel_executor_size | 0 |
| max_connections_size_per_query | 1 |
| check_table_metadata_enabled | false |
| sql_federation_type | NONE |
| proxy_frontend_database_protocol_type | |
| proxy_frontend_flush_threshold | 128 |
| proxy_hint_enabled | false |
| proxy_backend_query_fetch_size | -1 |
| proxy_frontend_executor_size | 0 |
| proxy_backend_executor_suitable | OLAP |
| proxy_frontend_max_connections | 0 |
| proxy_backend_driver_type | JDBC |
| proxy_mysql_default_version | 5.7.22 |
| proxy_default_port | 3307 |
| proxy_netty_backlog | 1024 |
| proxy_instance_type | Proxy |
| proxy_metadata_collector_enabled | false |
| agent_plugins_enabled | true |
| cached_connections | 0 |
| transaction_type | LOCAL |
+---------------------------------------+----------------+
22 rows in set (0.01 sec)
PROXY 系统变量配置SHOW DIST VARIABLE WHERE NAME = sql_show;
mysql> SHOW DIST VARIABLE WHERE NAME = sql_show;
+---------------+----------------+
| variable_name | variable_value |
+---------------+----------------+
| sql_show | false |
+---------------+----------------+
1 row in set (0.00 sec)
SHOW、DIST、VARIABLE、VARIABLES、NAME