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Posted to dev@calcite.apache.org by "Haisheng Yuan (Jira)" <ji...@apache.org> on 2020/06/18 16:11:00 UTC

[jira] [Created] (CALCITE-4071) Make RelNode Immutable

Haisheng Yuan created CALCITE-4071:
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             Summary: Make RelNode Immutable
                 Key: CALCITE-4071
                 URL: https://issues.apache.org/jira/browse/CALCITE-4071
             Project: Calcite
          Issue Type: Improvement
          Components: core
            Reporter: Haisheng Yuan


Currently, RelNode is mutable, mainly in planner. That makes planner code error-prone, hard to maintain, and complicate the logic. Let's try to avoid using {{replaceInput}}, at least inside planner, and see if we can deprecate {{replaceInput}}. That will make planner more robust.



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