Delphi dbExpress and Interbase: UTF8 migration steps and risks?

Question

Currently, our database uses Win1252 as the only character encoding. We will have to support Unicode in the database tables soon, which means we have to perform this migrati

Answer 1

Problem: UPDATE on a empty string field no longer finds a record. If a UTF8 character field is empty, the DataSetProvider generates a wrong SELECT for the update action.

Symptom: Message 'record not found or edited by another user'

Solution: upgrade to Delphi 2010 Update 4 or use the workaround described in QC