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Posted to dev@calcite.apache.org by "Liya Fan (Jira)" <ji...@apache.org> on 2020/09/27 09:42:00 UTC

[jira] [Created] (CALCITE-4287) Fix a bug in AggregateJoinRemoveRule

Liya Fan created CALCITE-4287:
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             Summary: Fix a bug in AggregateJoinRemoveRule
                 Key: CALCITE-4287
                 URL: https://issues.apache.org/jira/browse/CALCITE-4287
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: Liya Fan
            Assignee: Liya Fan


In {{AggregateJoinRemoveRule#onMatch}}, the logic of checking if the aggregate references any columns from the other side is incorrect.

For example, given an aggregate on a left join, the logic checks if the aggregate references any columns from the right side. If the aggregate happens to references the last column of the left input, the current implementation will make a wrong decision to skip the rule match. 

 

This will miss opportunities of simplifying the plan. 



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