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https://issues.apache.org/jira/browse/DRILL-4927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15616941#comment-15616941
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ASF GitHub Bot commented on DRILL-4927:
---------------------------------------
Github user amansinha100 commented on a diff in the pull request:
https://github.com/apache/drill/pull/635#discussion_r85625856
--- Diff:
exec/java-exec/src/test/java/org/apache/drill/TestJoinNullable.java ---
@@ -493,4 +496,81 @@ public void withNullEqualAdditionFilter() throws
Exception {
.go();
}
+ @Test
+ public void withMixedEqualAndIsNotDistinctHashJoin() throws Exception {
--- End diff --
Could you add a test with the predicate of type:
t1.key = t2.key AND ((t1.data=t2.data) OR (t1.data IS NULL AND t2.data
IS NULL))
where the right side of the AND gets converted to IS NOT DISTINCT FROM.
> 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: Aman Sinha
> 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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