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Posted to dev@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2016/09/01 01:35:21 UTC

[jira] [Created] (CALCITE-1367) Implement equals and hashCode for all sub-classes of RexNode

Julian Hyde created CALCITE-1367:
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             Summary: Implement equals and hashCode for all sub-classes of RexNode
                 Key: CALCITE-1367
                 URL: https://issues.apache.org/jira/browse/CALCITE-1367
             Project: Calcite
          Issue Type: Bug
            Reporter: Julian Hyde
            Assignee: Julian Hyde


Currently not all sub-classes of {{RexNode}} override {{Object.equals}} and {{Object.hashCode}} methods, so they can't be used in java collections, e.g. as keys in maps.

To fix, override {{equals}} and {{hashCode}} in {{RexCall}} and maybe other sub-classes. See if there are workarounds (using digests instead of the {{RexNode}} themselves, using {{IdentityHashMap}}, using canonization) and if appropriate remove them.



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