SHOW SINGLE TABLES
描述
SHOW SINGLE TABLES 语法用于查询指定逻辑库中的单表。
语法
ShowSingleTables ::=
'SHOW' 'SINGLE' 'TABLES' ('FROM' databaseName)? showLike?
showLike ::=
'LIKE' likePattern
likePattern ::=
string
databaseName ::=
identifier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。
返回值说明
| 列 | 说明 |
|---|---|
| table_name | 单表名称 |
| storage_unit_name | 单表所在的数据源名称 |
| schema_name | Schema 名称，仅在存在 Schema 元数据时返回 |
示例
- 查询指定逻辑库中的单表
SHOW SINGLE TABLES FROM sharding_db;mysql> SHOW SINGLE TABLES FROM sharding_db;
+------------+-------------------+
| table_name | storage_unit_name |
+------------+-------------------+
| t_user | ds_0 |
+------------+-------------------+
1 row in set (0.00 sec)- 查询当前逻辑库中的单表
SHOW SINGLE TABLES;mysql> SHOW SINGLE TABLES;
+------------+-------------------+
| table_name | storage_unit_name |
+------------+-------------------+
| t_user | ds_0 |
+------------+-------------------+
1 row in set (0.00 sec)- 查询指定逻辑库中表名以
order_5结尾的单表
SHOW SINGLE TABLES FROM sharding_db LIKE '%order_5';mysql> SHOW SINGLE TABLES FROM sharding_db LIKE '%order_5';
+------------+-------------------+
| table_name | storage_unit_name |
+------------+-------------------+
| t_order_5 | ds_1 |
+------------+-------------------+
1 row in set (0.11 sec)- 查询当前逻辑库中表名以
order_5结尾的单表
SHOW SINGLE TABLES LIKE '%order_5';mysql> SHOW SINGLE TABLES LIKE '%order_5';
+------------+-------------------+
| table_name | storage_unit_name |
+------------+-------------------+
| t_order_5 | ds_1 |
+------------+-------------------+
1 row in set (0.11 sec)保留字
SHOW、SINGLE、TABLE、TABLES、LIKE、FROM