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1. Union mapping two table with different id column names    forum.hibernate.org

2. Deep Union-sub inheritance consumes lots-o heap space>768    forum.hibernate.org

Hi All, I'm using Oracle 10g and Hibernate Core 3.2.6 on a complex app with quite a few classes (~90 at present, with 13 abstract classes [most near tree top], and ~200 classes planned). (The hibernate version used does not affect the memory usage.) I switched to union-sub from table per class at around 30 classes and had to increase the ...