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  1. Apache Drill
  2. DRILL-6758

Hash Join should not return the join columns when they are not needed downstream

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      Description

      Currently the Hash-Join operator returns all its (both sides) incoming columns. In cases where the join columns are not used further downstream, this is a waste (allocating vectors, copying each value, etc).

        Suggestion: Have the planner pass this information to the Hash-Join operator, to enable skipping the return of these columns.

       

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            • Assignee:
              hanu.ncr Hanumath Rao Maduri
              Reporter:
              ben-zvi Boaz Ben-Zvi
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                Updated: