Oracle Message DRG-12605 - datatype of column number in COLUMNS list is not supported

ERRORdatatype of column number in COLUMNS list is not supported
CAUSEone or more of the columns in the column list of the multi datastore are of a type which the multi datastore is unable to process
ACTIONchange the column list of the multi datastore to contain only supported types. PL/SQL functions can be used in the comlumn list to convert unsupported types to supported types.