DBConnect Daylight saving conversion

Question

Hello Experts,
I am trying to extract data from Oracle Database tables and their Date format is Daylight saving and using their Oracle side function to convert it to "mm/dd/yyyy hh:mm:ss" is taking a lot of time while extraction.
So, i am tying to replicate the following code in SAP:
FUNCTION DATE_TIME_CONV (dRemedyDateIn IN NUMBER)
RETURN DATE
IS
dDateOut DATE;
  BEGIN
IF dRemedyDateIn is NULL THEN
   RETURN NULL;
END IF;
      dDateOut := TO_DATE('12/31/1969 16:00:00','MM/DD/YYYY HH24:MI:SS') + ( dRemedyDateIn/ ( 60 * 60 * 24 ));
      IF ( dDateOut < DAY_LIGHT_SAVING_STARTS(dDateOut) )
            OR ( DAY_LIGHT_SAVING_ENDS(dDateOut) <= dDateOut ) THEN
            dDateOut := TO_DATE('01/01/1970','MM/DD/YYYY') +  ((( dRemedyDateIn / 60 / 60 )- 8) / 24 );
      ELSE
            dDateOut := TO_DATE('01/01/1970','MM/DD/YYYY') +  ((( dRemedyDateIn / 60 / 60 )- 7) / 24 );
      END IF;
      RETURN dDateOut;
END DATE_TIME_CONV;
Did somebody have come across this scenario?
Thanks
Arun

Answer 1

try to play around with these function modules..
GET_SYSTEM_TIMEZONE
TZ_LOCATION_TIMEZONE           Time zones: Determine time zone for a location (land, region)                                                                               
TZON_GET_OS_TIMEZONE                                                                           
TZON_LOCATION_TIMEZONE                                                                               
TZON_CHECK_TIMEZONE                                                                            
TZON_GET_TIMEZONE_TEXT                                                                         
TZON_GET_USER_TIMEZONE