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DROP CAST -- remove a user-defined cast
DROP CAST (sourcetype AS targettype)
[ CASCADE | RESTRICT ]
DROP CAST removes a previously
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.
The name of the source data type of the cast.
The name of the target data type of the cast.
These key words do not have any effect, since there are
no dependencies on casts.
Use CREATE CAST to create
To drop the cast from type text to type
DROP CAST (text AS int4);
The DROP CAST command conforms to