DROP CAST SQL - Language Statements DROP CAST remove a cast DROP CAST DROP CAST (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. 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.