Release 10.1A: OpenEdge Deployment:
Managing 4GL Applications

> ## Modifying the application database

> Upgrading is more complicated when you have to change the database schema. If you are upgrading with unencrypted source, encrypted source, or CRC-based r-code, you can supply an incremental `.df` file and copies of the modified procedures.

> If you are upgrading with time-stamp-based r-code, you must supply the following:

> - A new empty application database that includes the modified tables, fields, and indexes.

> - Precompiled versions of all modified procedures.

> - Dump/load utilities that will dump the user’s data and definitions and load them into the new empty database.

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