As a minor trigger enhancement in V5R1, the restriction that prevented triggers from being defined over tables with binary large object (BLOB) or character large object (CLOB) columns was eliminated. As part of the infrastructure changes, the values in the trigger buffer passed to the trigger program may be different once you start running your triggers in V5R1. Trigger programs that are properly coded to access the trigger buffer values (e.g., a new record image) by using the provided offsets and lengths will run without any problems on V5R1; however, improperly designed trigger programs that accessed the trigger buffer values by hard-coding access to the old and new record images may not function as expected after you install V5R1.
When installing V5R1, take the time to verify that your trigger program design and implementation is correct. The offset and length values passed in the trigger program buffer can change at any time.
Kent Milligan is a Senior Technical Team Lead on the Emerging Technology Delivery team for the IBM Watson for Clinical Trial Matching solution. Prior to joining the Watson team in 2015, Kent spent the first 25 years of his career working as a DB2 for IBM i consultant and developer working out of the IBM Rochester lab.