DROP SHARDING ALGORITHM 语法用于删除指定逻辑库的指定分片算法。
DropShardingAlgorithm ::=
'DROP' 'SHARDING' 'ALGORITHM' algorithmName ifExists? ('FROM' databaseName)?
ifExists ::=
'IF' 'EXISTS'
algorithmName ::=
identifier
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;ifExists 子句用于避免 Sharding algorithm not exists 错误。DROP SHARDING ALGORITHM t_order_hash_mod FROM sharding_db;
DROP SHARDING ALGORITHM t_order_hash_mod;
ifExists 子句删除分片算法DROP SHARDING ALGORITHM IF EXISTS t_order_hash_mod;
DROP、SHARDING、ALGORITHM、FROM
