SHOW DIST VARIABLE 语法用于查询 PROXY 系统变量配置。
ShowDistVariable ::=
'SHOW' 'DIST' ('VARIABLES' ('LIKE' likePattern)?| 'VARIABLE' 'WHERE' 'NAME' '=' variableName)
likePattern ::=
string
variableName ::=
identifier
| 列 | 说明 |
|---|---|
| variable_name | 系统变量名称 |
| variable_value | 系统变量值 |
variableName 时，默认查询所有持久化 PROXY 系统变量配置和缓存连接数PROXY 系统变量配置SHOW DIST VARIABLES;
mysql> SHOW DIST VARIABLES;
+-------------------------------------------------------+-----------------+
| variable_name | variable_value |
+-------------------------------------------------------+-----------------+
| agent_plugins_enabled | true |
| cached_connections | 0 |
| cdc_server_port | 33071 |
| check_table_metadata_enabled | false |
| groovy_inline_expression_parsing_cache_max_size | 1000 |
| kernel_executor_size | 0 |
| load_table_metadata_batch_size | 1000 |
| max_connections_size_per_query | 1 |
| max_union_size_per_datasource | 2147483647 |
| metadata_identifier_case_sensitivity | DATABASE |
| proxy_backend_query_fetch_size | -1 |
| proxy_default_port | 3307 |
| proxy_frontend_connection_idle_timeout | 28800 |
| proxy_frontend_database_protocol_type | |
| proxy_frontend_executor_size | 0 |
| proxy_frontend_flush_threshold | 128 |
| proxy_frontend_max_connections | 0 |
| proxy_frontend_ssl_cipher | |
| proxy_frontend_ssl_enabled | false |
| proxy_frontend_ssl_version | TLSv1.2,TLSv1.3 |
| proxy_netty_backlog | 1024 |
| sql_show | false |
| sql_simple | false |
+-------------------------------------------------------+-----------------+
23 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