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

语法 铁路图

ShowRulesUsedStorageUnit ::=
  'SHOW' 'RULES' 'USED' 'STORAGE' 'UNIT' storageUnitName ('FROM' databaseName)?
storageUnitName ::=
  identifier
databaseName ::=
  identifier

返回值说明

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 |
| readwrite_splitting | ms_group_0 |
+---------------------+------------+
2 rows 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 |
| readwrite_splitting | ms_group_0 |
+---------------------+------------+
2 rows in set (0.01 sec)

保留字

SHOW、RULES、USED、STORAGE、UNIT、FROM

相关链接

• 保留字