SHOW SHARDING ALGORITHMS 语法用于查询指定逻辑库的分片算法。
ShowShardingAlgorithms::=
'SHOW' 'SHARDING' 'ALGORITHMS' ('FROM' databaseName)?
databaseName ::=
identifier
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。| 列 | 说明 |
|---|---|
| name | 分片算法名称 |
| type | 分片算法类型 |
| props | 分片算法参数 |
SHOW SHARDING ALGORITHMS FROM sharding_db;
mysql> SHOW SHARDING ALGORITHMS FROM sharding_db;
+-------------------------+--------+-----------------------------------------------------+
| name | type | props |
+-------------------------+--------+-----------------------------------------------------+
| t_order_inline | INLINE | algorithm-expression=t_order_${order_id % 2} |
| t_order_item_inline | INLINE | algorithm-expression=t_order_item_${order_id % 2} |
+-------------------------+--------+-----------------------------------------------------+
2 rows in set (0.01 sec)
SHOW SHARDING ALGORITHMS;
mysql> SHOW SHARDING ALGORITHMS;
+-------------------------+--------+-----------------------------------------------------+
| name | type | props |
+-------------------------+--------+-----------------------------------------------------+
| t_order_inline | INLINE | algorithm-expression=t_order_${order_id % 2} |
| t_order_item_inline | INLINE | algorithm-expression=t_order_item_${order_id % 2} |
+-------------------------+--------+-----------------------------------------------------+
2 rows in set (0.01 sec)
SHOW、SHARDING、ALGORITHMS、FROM