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Posted to issues@drill.apache.org by "Roman (JIRA)" <ji...@apache.org> on 2016/10/04 10:21:20 UTC

[jira] [Created] (DRILL-4926) Add support for Null Equality Joins

Roman created DRILL-4926:
----------------------------

             Summary: Add support for Null Equality Joins
                 Key: DRILL-4926
                 URL: https://issues.apache.org/jira/browse/DRILL-4926
             Project: Apache Drill
          Issue Type: Improvement
          Components: Query Planning & Optimization
    Affects Versions: 1.8.0
            Reporter: Roman
            Assignee: Roman


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

{code:sql}
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);
{code}

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



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