Controls how a date, time, or timestamp value is passed to the client application when queried.
RETURN_DATE_TIME_AS_STRING 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 server converts the date, time, or timestamp value to a string before it is sent to the client in order 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.