Add nodes to allow Subqueries to be processed #38
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quick comment: mark join/single join should probably be moved into Just some thoughts, I know that Mark Join has to take a marked column as metadata. |
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Problem
There is no way to currently represent subqueries.
Summary of changes
Added a subquery node (to be decorrelated), as well as the 3 major decorrelated join nodes. All of these are logical only since the goal is to convert a logical subquery node to one of these 3 logical join nodes in unnesting.