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Status

Current state:   [One of "Under Discussion", "Accepted", "Rejected"]

Discussion thread: thread: https://lists.apache.org/thread/g211rn7j09z1cgrspz0kstxqkkbwfpq9

Voting thread: https://lists.apache.org/thread/shxrhyxlt87rpc64d0xlbkndr6hy9oyhhere [Change the link from the KIP proposal email archive to your own email thread]

JIRA:

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The config can either have the values "all", "none" or any of the three rules above. It cannot combine "all" or "anynone" with any other config.

Proposed Changes

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• Add a rule to the optimizer that will rewrite an inner join to a self-join. The graphs (logical plans) created from the DSL excerpts above are the same (after the already existing optimization mergeDuplicateSourceNodes) and look as follows:

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