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Posted to dev@calcite.apache.org by "daimin (Jira)" <ji...@apache.org> on 2019/10/25 09:58:00 UTC

[jira] [Created] (CALCITE-3447) Fix equivalents in method SubstitutionVisitor#go

daimin created CALCITE-3447:
-------------------------------

             Summary: Fix equivalents in method SubstitutionVisitor#go
                 Key: CALCITE-3447
                 URL: https://issues.apache.org/jira/browse/CALCITE-3447
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: daimin


Code segment here depends on `hashcode` and `equals` methods of class `MutableRel`:

[https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/plan/SubstitutionVisitor.java#L492-L502] 

However the implementations of class `MutableScan` delegates to class `TableScan`, which directly relies on implementations of class `Object`. This leads to a situation that two `MutableScan` on the exactly same table will not be considered as equivalent.



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