DROP SHARDING KEY GENERATOR 语法用于从当前逻辑库中删除分片主键生成器。
DropShardingKeyGenerator ::=
'DROP' 'SHARDING' 'KEY' 'GENERATOR' ifExists? keyGeneratorName (',' keyGeneratorName)*
ifExists ::=
'IF' 'EXISTS'
keyGeneratorName ::=
identifier
ifExists 子句用于避免 Sharding key generator not exists 错误。DROP SHARDING KEY GENERATOR t_order_snowflake;
DROP SHARDING KEY GENERATOR t_order_snowflake, t_item_snowflake;
ifExists 子句删除分片主键生成器DROP SHARDING KEY GENERATOR IF EXISTS t_order_snowflake;
DROP、SHARDING、KEY、GENERATOR、IF、EXISTS