SHOW SHARDING TABLE REFERENCE RULE
描述
SHOW SHARDING BINDING TABLE RULE 语法用于查询指定逻辑库中指定分片表关联规则。
语法
ShowShardingBindingTableRules::=
'SHOW' 'SHARDING' 'TABLE' 'REFERENCE' ('RULE' ruleName | 'RULES') ('FROM' databaseName)?
ruleName ::=
identifier
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 |
|---|---|
| name | 分片表关联规则名称 |
| sharding_table_reference | 分片表关联关系 |
示例
- 查询指定逻辑库中的分片表关联规则
SHOW SHARDING TABLE REFERENCE RULES FROM sharding_db;mysql> SHOW SHARDING TABLE REFERENCE RULES FROM sharding_db;
+-------+--------------------------+
| name | sharding_table_reference |
+-------+--------------------------+
| ref_0 | t_a,t_b |
| ref_1 | t_c,t_d |
+-------+--------------------------+
2 rows in set (0.00 sec)- 查询当前逻辑库中的分片表关联规则
SHOW SHARDING TABLE REFERENCE RULES;mysql> SHOW SHARDING TABLE REFERENCE RULES;
+-------+--------------------------+
| name | sharding_table_reference |
+-------+--------------------------+
| ref_0 | t_a,t_b |
| ref_1 | t_c,t_d |
+-------+--------------------------+
2 rows in set (0.00 sec)- 查询指定逻辑库中的指定分片表关联规则
SHOW SHARDING TABLE REFERENCE RULE ref_0 FROM sharding_db;mysql> SHOW SHARDING TABLE REFERENCE RULE ref_0 FROM sharding_db;
+-------+--------------------------+
| name | sharding_table_reference |
+-------+--------------------------+
| ref_0 | t_a,t_b |
+-------+--------------------------+
1 row in set (0.00 sec)- 查询当前逻辑库中的分片表关联规则
SHOW SHARDING TABLE REFERENCE RULE ref_0;mysql> SHOW SHARDING TABLE REFERENCE RULE ref_0;
+-------+--------------------------+
| name | sharding_table_reference |
+-------+--------------------------+
| ref_0 | t_a,t_b |
+-------+--------------------------+
1 row in set (0.00 sec)保留字
SHOW、SHARDING、TABLE、REFERENCE、RULE、RULES、FROM