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https://issues.apache.org/jira/browse/DRILL-4927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15548262#comment-15548262
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ASF GitHub Bot commented on DRILL-4927:
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GitHub user KulykRoman opened a pull request:
https://github.com/apache/drill/pull/603
DRILL-4927: Add support for Null Equality Joins
- Added changes to support Null Equality Joins;
- Created tests for it.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/KulykRoman/drill DRILL-4927
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/603.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #603
----
commit b218d64ff0238ec947e6beba9a521d14daee6c42
Author: Roman Kulyk <[email protected]>
Date: 2016-10-04T13:58:13Z
DRILL-4927: Add support for Null Equality Joins
- Added changes to support Null Equality Joins;
- Created tests for it.
----
> Add support for Null Equality Joins
> -----------------------------------
>
> Key: DRILL-4927
> URL: https://issues.apache.org/jira/browse/DRILL-4927
> Project: Apache Drill
> Issue Type: Improvement
> Components: Query Planning & Optimization
> Affects Versions: 1.8.0
> Reporter: Roman
> Assignee: Roman
> Labels: doc-impacting
> Fix For: 1.9.0
>
>
> 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 for this option.
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