SHOW RULES USED STORAGE UNIT
描述
SHOW RULES USED STORAGE UNIT 语法用于查询指定逻辑库中使用指定存储单元的规则。
语法
ShowRulesUsedStorageUnit ::=
'SHOW' 'RULES' 'USED' 'STORAGE' 'UNIT' storageUnitName ('FROM' databaseName)?
storageUnitName ::=
identifier
databaseName ::=
identifier返回值说明
| 列 | 说明 |
|---|---|
| type | 规则类型 |
| name | 规则名称 |
补充说明
- 未指定
databaseName时，默认是当前使用的DATABASE。如果也未使用DATABASE则会提示No database selected。
示例
- 查询指定逻辑库中使用指定存储单元的规则
SHOW RULES USED STORAGE UNIT ds_1 FROM sharding_db;mysql> SHOW RULES USED STORAGE UNIT ds_1 FROM sharding_db;
+---------------------+------------+
| type | name |
+---------------------+------------+
| readwrite_splitting | ms_group_0 |
+---------------------+------------+
1 row in set (0.01 sec)- 查询当前逻辑库中使用指定存储单元的规则
SHOW RULES USED STORAGE UNIT ds_1;mysql> SHOW RULES USED STORAGE UNIT ds_1;
+---------------------+------------+
| type | name |
+---------------------+------------+
| readwrite_splitting | ms_group_0 |
+---------------------+------------+
1 row in set (0.01 sec)保留字
SHOW、RULES、USED、STORAGE、UNIT、FROM