DROP CONVERSION 7 SQL - Language Statements DROP CONVERSION remove a conversion DROP CONVERSION DROP CONVERSION [ IF EXISTS ] name [ CASCADE | RESTRICT ] DROP CONVERSION removes a previously defined conversion. To be able to drop a conversion, you must own the conversion. IF EXISTS Do not throw an error if the conversion does not exist. A notice is issued in this case. name The name of the conversion. The conversion name can be schema-qualified. CASCADE RESTRICT These key words do not have any effect, since there are no dependencies on conversions. To drop the conversion named myname: DROP CONVERSION myname; There is no DROP CONVERSION statement in the SQL standard.