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Posted to issues@calcite.apache.org by "Ruben Q L (Jira)" <ji...@apache.org> on 2020/06/04 08:54:00 UTC

[jira] [Created] (CALCITE-4042) JoinCommuteRule should not match SEMI / ANTI join

Ruben Q L created CALCITE-4042:
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             Summary: JoinCommuteRule should not match SEMI / ANTI join
                 Key: CALCITE-4042
                 URL: https://issues.apache.org/jira/browse/CALCITE-4042
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.23.0
            Reporter: Ruben Q L
            Assignee: Ruben Q L
             Fix For: 1.24.0


JoinCommuteRule should not match SEMI / ANTI join, because these types cannot be swapped.

This is a minor issue, because the "default" JoinCommuteRule.INSTANCE matches only INNER joins. However, there is another version of the rule (JoinCommuteRule.SWAP_OUTER, currently only used in a few unit tests), to match also outer joins, which could potentially match a SEMI / ANTI join.



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