DROP_CAST - remove a cast

       The DROPCAST command conforms to the SQL standard.

DROPCAST removes a previously defined cast.

       To be able to drop a cast, you must own the source or the target data type. These are the same privileges
       that are required to create a cast.

       To drop the cast from type text to type int:

           DROP CAST (text AS int);

       DROP_CAST - remove a cast

       IF EXISTS
           Do not throw an error if the cast does not exist. A notice is issued in this case.

       source_type
           The name of the source data type of the cast.

       target_type
           The name of the target data type of the cast.

       CASCADE
       RESTRICT
           These key words do not have any effect, since there are no dependencies on casts.

       CREATE CAST (CREATE_CAST(7))

PostgreSQL 17.5                                       2025                                          DROPCAST(7)

       DROP CAST [ IF EXISTS ] (source_type AS target_type) [ CASCADE | RESTRICT ]