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  1. Apache Drill
  2. DRILL-4926

Add support for Null Equality Joins

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: 1.8.0
    • Fix Version/s: None
    • Labels:
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      Description

      Join with an equality condition which allows null=null fails. For example, if we use some of this queries:

      select ... FROM t1, t2 WHERE t1.c1 = t2.c2 OR (t1.c1 IS NULL AND t2.c2 IS NULL);
      
      select ... FROM t1 INNER JOIN  t2 ON  t1.c1 = t2.c2 OR (t1.c1 IS NULL AND t2.c2 IS NULL);
      

      we got "UNSUPPORTED_OPERATION ERROR". We should add support of this option.

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              • Assignee:
                RomanKulyk Roman Kulyk
                Reporter:
                RomanKulyk Roman Kulyk
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                • Created:
                  Updated:
                  Resolved: