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Deprecated Objects and APPLCOMPAT
by Jim Dee
DBAs are notoriously conservative when it comes to migrating data to new types of objects. Our theme seems to be "if it ain't broke, don't fix it!" IBM has decided to encourage those of us on Db2 for z/OS to migrate our data to Universal Table Spaces (UTS) by essentially deprecating non UTS spaces in FL504 of Db2 12. Remember that we get to control the timing of when the functional changes occur. Even if the maintenance has been applied, none of these changes take effect until FL504 is activated. The considerations around activating the function level and setting APPLCOMPAT appropriately center around two areas:
What to do if we want to move aggressively towards the restrictions
What to do if we want to keep running without the restrictions