Removes a cast.
DROP CAST [IF EXISTS] (sourcetype AS targettype) [CASCADE | RESTRICT]
DROP CAST will delete 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.
- IF EXISTS
- Do not throw an error if the cast does not exist. A notice is issued in this case.
- The name of the source data type of the cast.
- The name of the target data type of the cast.
- These keywords have no effect since there are no dependencies on casts.
To drop the cast from type text to type int:
DROP CAST (text AS int);
There DROP CAST command conforms to the SQL standard.