DBTIMEZONE keyword was removed from the AT TIME ZONE expression.
Example Code
Input Code:
IN -> Oracle_01.sql
SELECT TIMESTAMP '1998-12-25 09:26:50.12' AT TIME ZONE DBTIMEZONE FROM DUAL;
Output Code:
OUT -> Oracle_01.sql
SELECT
--** SSC-FDM-OR0017 - DBTIMEZONE WAS REMOVED TO USE THE DEFAULT VALUE OF THE TIMESTAMP **
TO_TIMESTAMP_LTZ( TIMESTAMP '1998-12-25 09:26:50.12')
FROM DUAL;
Recommendations
You may need to set the TIMEZONE session parameter in order to get equal results.