# Note that date data must consist of a date encased in
    # single quotes followed by a comma, then a date
    # format string encased in single quotes.  For example:
    #    '2002-05-30','YYYY-MM-DD'
    # or     '05/30/2000:18:31','MM/DD/YYYY:HH:MM'
    foreach $name ( keys (%$r_datedata) ) {
        $column_str .= $name . ", ";
        if ( $$r_datedata{$name} eq "SYSDATE" ) {
            $value_str .= "SYSDATE, ";
        } else {
            $value_str .= "to_date(" . $$r_datedata{$name} . "), ";
        }
    }