Synopsis:

        sys_timeadd(start_date,start_time,seconds)

Arguments:

        start_date         - The starting date (either YYYYMMDD or YYMMDD)

        start_time        - the starting time (HHMMSS)

        seconds          - The number of seconds to add to the start_date and start_time

Description:   This function adds the specified number of seconds to the start_date and start_time and returns a new date and time as a single string with the format  YYMMDDHHMMSS or YYYYMMDDHHMMSS depending on how the start_date was originally specified.

Return Value:

Returns the new date and time string after adding seconds to the original date and time.