First: `join` allows you to specify a join condition. You can often use
that to bypass tables or automat selects
query(A).join(B, A.id == B.id_a)
But: what you really need to do is check the generated SQL to see what is
going on, and tweak that to eliminate the joins/fields you don't need. Then
you can run the raw SQL against EXPLAIN in an Oracle client to see what is
slow and why. Based on that, you can tweak what SqlAlchemy does.
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
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