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Database modernization on the IBM i is more complex & expensive than it could be.
The Lab Services approach  of creating a logical file over redesigned tables, (to act as a surrogate for the old design) is a clever hack that reduces the cost somewhat.
But in order for database modernization to have first class support on the platform, we need the new instead-of-trigger functionality on logical files to allow the logical file to have a different record format then the physical.
Without this, database modernization is incompatible with instead of triggers. Being able to use instead of triggers would open up a world of design techniques that would reduce development times.
 Chapter 9 of the "Modernizing IBM i Applications" Redbook.
Create logical file matching existing table definition, and then add new columns like surrogate key, row change timestamp, etc with a new table name. Then try to define business rules at the data layer using instead-of-triggers.
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