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Posted to dev@calcite.apache.org by "Vladimir Sitnikov (Jira)" <ji...@apache.org> on 2020/01/06 17:19:00 UTC

[jira] [Created] (CALCITE-3713) Remove column names from Project#digest

Vladimir Sitnikov created CALCITE-3713:
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             Summary: Remove column names from Project#digest
                 Key: CALCITE-3713
                 URL: https://issues.apache.org/jira/browse/CALCITE-3713
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.21.0
            Reporter: Vladimir Sitnikov
            Assignee: Vladimir Sitnikov


Projects that differ with column names only are equivalent, so the planning space can be reduced if field names do not participate in relation matching.

For instance, {{Project(input=rel#1,empid=$0)}} and {{Project(input=rel#1,deptno=$0)}} are equivalent



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