Could TiDB Lightning skip creating schema and tables?

Starting from v5.1, TiDB Lightning can automatically recognize the schema and tables in the downstream. If you use TiDB Lightning earlier than v5.1, you need to set no-schema = true in the [mydumper] section in tidb-lightning.toml. This makes TiDB Lightning skip the CREATE TABLE invocations and fetch the metadata directly from the target database. TiDB Lightning will exit with error if a table is actually missing.