Return strings values as python unicode string

    http://www.oracle.com/technetwork/articles/dsl/tuininga-cx-oracle-084866.html

def _unicode_output(cursor, name, default_type, size, precision, scale):
    '''
    Return strings values as python unicode string

    http://www.oracle.com/technetwork/articles/dsl/tuininga-cx-oracle-084866.html
    '''
    if default_type in (cx_Oracle.STRING, cx_Oracle.LONG_STRING,
                        cx_Oracle.FIXED_CHAR, cx_Oracle.CLOB):
        return cursor.var(six.text_type, size, cursor.arraysize)