Hi,

As I touch Correlate relations, I had to touch RelDecorrelator code.
I think I get the idea of that 3000 line thing, however I am not sure
what is the idea behind mapOldToNewRel.

Am I right it would be better to express RelDecorrelator in terms of
some RelShuttle?
I think I would be able to pass with my LogicalCorrelate without major
changes to decorrelator. However I wonder if there are known pitfalls
(e.g. what kind of state is held in RelDecorrelator and if there are
state dependencies between different methods/etc).

-- 
Regards,
Vladimir Sitnikov

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