PostgreSQL 8.2.6 Documentation
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DROP CAST

Name

DROP CAST -- remove a cast


DROP CAST [ IF EXISTS ] (

sourcetype

 AS 

targettype

) [ CASCADE | RESTRICT ]

DROP CAST 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.

IF EXISTS: Do not throw an error if the cast does not exist. A notice is issued in this case.
sourcetype: The name of the source data type of the cast.
targettype: 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.

To drop the cast from type text to type int :


DROP CAST (text AS int);

The DROP CAST command conforms to the SQL standard.

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