| DROP CONVERSION NameDROP CONVERSION -- remove a user-defined conversionSynopsisDROP CONVERSION conversion_name
    [ CASCADE | RESTRICT ]Description   DROP CONVERSION removes a previously defined conversion.
      To be able to drop a conversion, you must own the conversion.
   Parameters conversion_name       The name of the conversion. The conversion name may be
       schema-qualified.
      CASCADERESTRICT
       These key words do not have any effect, since there are no
       dependencies on conversions.
      
Notes   Use CREATE CONVERSION to create user-defined conversions.
      The privileges required to drop a conversion may be changed in a future
   release.
  Examples   To drop the conversion named myname:
 DROP CONVERSION myname; 
  Compatibility    DROP CONVERSION
    is a PostgreSQL extension.
    There is no DROP CONVERSION
    statement in SQL99.
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