[jira] [Created] (CALCITE-4105) Replace Pair with Flat2List in RelDigestWriter to improve hash code distribution

[Haisheng Yuan (Jira)]

Haisheng Yuan created CALCITE-4105:
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             Summary: Replace Pair with Flat2List in RelDigestWriter to improve 
hash code distribution
                 Key: CALCITE-4105
                 URL: https://issues.apache.org/jira/browse/CALCITE-4105
             Project: Calcite
          Issue Type: Improvement
          Components: core
            Reporter: Haisheng Yuan
            Assignee: Haisheng Yuan


Pair hashCode uses XOR, Flat2List uses 31 prime multiplication.



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