Hi, here is the situation : - a table, say "tableA", that contains a certain number of fields, is mapped to a class "A", - a table, say "tableB", contains some extra attributes that semantically belong to table "tableA", but "tableA" cannot be extended, in order not to break existing code. The goal is to create a class, say "ExtendedA", that contains all the attributes of class "A", and some attributes coming from table "tableB", and map this class to the database without modifying neither "tableA",
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