IsSchemaDDL returns true if the action type is a schema DDL.

IsSysSchema returns true if the given schema is a system schema.

NewFilter creates a filter.

SupportedEventTypes returns the supported event types.

VerifyTableRules checks the table filter rules in the configuration and returns an invalid rule error if the verification fails, otherwise it will return a table filter.

DDLTsTable is the table name use to write ddl commitTs for each table when downstream is mysql-class.

LightningTaskInfoSchema is the schema only generated by Lightning.

SyncPointTable is the table name use to write ts-map when sync-point is enable.

TiCDCSystemSchema is the schema only use by TiCDC.

Filter are safe for concurrent use.