ALTER SHARDING KEY GENERATE STRATEGY

AlterShardingKeyGenerateStrategy ::=
  'ALTER' 'SHARDING' 'KEY' 'GENERATE' 'STRATEGY' keyGenerateStrategyName '(' keyGenerateStrategyDefinition ')'

keyGenerateStrategyDefinition ::=
  columnKeyGenerateStrategyDefinition
  | sequenceKeyGenerateStrategyDefinition

columnKeyGenerateStrategyDefinition ::=
  'TABLE' '=' tableName ',' 'COLUMN' '=' columnName ',' keyGenerateAlgorithmDefinition

sequenceKeyGenerateStrategyDefinition ::=
  'SEQUENCE' '=' sequenceName ',' keyGenerateAlgorithmDefinition

keyGenerateAlgorithmDefinition ::=
  algorithmDefinition
  | 'GENERATOR' '=' keyGeneratorName

algorithmDefinition ::=
  'TYPE' '(' 'NAME' '=' algorithmType (',' propertiesDefinition)? ')'

propertiesDefinition ::=
  'PROPERTIES' '(' key '=' value (',' key '=' value)* ')'

key ::=
  string

value ::=
  literal

keyGenerateStrategyName ::=
  identifier

tableName ::=
  identifier

columnName ::=
  identifier

sequenceName ::=
  identifier | string

keyGeneratorName ::=
  identifier

algorithmType ::=
  string

ALTER SHARDING KEY GENERATE STRATEGY order_id_strategy (
TABLE=t_order,
COLUMN=order_id,
GENERATOR=snowflake_generator
);

ALTER SHARDING KEY GENERATE STRATEGY order_sequence_strategy (
SEQUENCE="order_seq",
TYPE(NAME="uuid")
);