Before executing FLASHBACK CLUSTER TO TIMESTAMP, TiDB disconnects all related connections and prohibits read and write operations on these tables until the FLASHBACK CLUSTER statement is completed.

CURRENT_TIMESTAMP (Transact-SQL) [!INCLUDE sql-asdb-asdbmi-asa-pdw-fabricse-fabricdw] This function returns the current database system timestamp as a datetime value, without the database time zone ...

Shelley Doll finishes her coverage of SQL data types with an overview of datetime and interval data types. Learn more about the basic syntax of these standard SQL types.