This option indicates whether date, time, and timestamp values are returned to applications as a date or time data type or
as a string.
When this option is set to On, the database server converts the date, time, or timestamp value to a string before it is sent
to the client to preserve the timestamp_format, date_format, or time_format option setting.
Sybase Central and Interactive SQL automatically turn the return_date_time_as_string option On.