SHOW SHADOW TABLE RULE
描述
SHOW SHADOW TABLE RULE 语法用于查询指定逻辑库中的影子表规则。
语法
ShowShadowTableRule::=
'SHOW' 'SHADOW' 'TABLE' ('RULE' tableName | 'RULES') ('FROM' databaseName)?
tableName ::=
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 |
|---|---|
| shadow_table | 影子表 |
| shadow_algorithm_name | 影子算法名称 |
示例
- 查询指定逻辑库中的影子表规则
SHOW SHADOW TABLE RULES FROM shadow_db;mysql> SHOW SHADOW TABLE RULES FROM shadow_db;
+--------------+-------------------------------------------------------+
| shadow_table | shadow_algorithm_name |
+--------------+-------------------------------------------------------+
| t_order_item | shadow_rule_t_order_item_value_match |
| t_order | sql_hint_algorithm,shadow_rule_t_order_regex_match |
+--------------+-------------------------------------------------------+
2 rows in set (0.00 sec)- 查询当前逻辑库中的指定影子表规则
SHOW SHADOW TABLE RULE t_order;- 查询当前逻辑库中的影子表规则
SHOW SHADOW TABLE RULES;mysql> SHOW SHADOW TABLE RULES;
+--------------+-------------------------------------------------------+
| shadow_table | shadow_algorithm_name |
+--------------+-------------------------------------------------------+
| t_order_item | shadow_rule_t_order_item_value_match |
| t_order | sql_hint_algorithm,shadow_rule_t_order_regex_match |
+--------------+-------------------------------------------------------+
2 rows in set (0.01 sec)保留字
SHOW、SHADOW、TABLE、RULE、RULES、FROM