In nonsharded upgrade mode, you have the option of reducing the size of some database tables by converting CHAR/NOT NULL columns to VARCHAR/NULL columns. Whether or not you plan to convert these columns, you must extend the following files and edit the corresponding XML files:
You cannot convert these columns in a sharded environment. Thus, if you want these columns converted and plan to move to a sharded environment in the future, you should perform this conversion as part of the nonsharded migration to Release 9.4.
If you are migrating from 8.0 (or later) to 9.4 on DB2®, perform the following migration: