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https://issues.apache.org/jira/browse/HIVE-741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12900941#action_12900941
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Ning Zhang commented on HIVE-741:
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The SMB test case still has a minor issue: the tables was created as 2 buckets
but there is only 1 file in the tables. This is conflicting to the table
schema. If a table is defined as bucketd 2, there should be 2 files in the
partition or table. They SMB join takes the 1st file in T1 join the 1st file in
T2, and 2nd file in T1 join 2nd file in T2. So the test case should cover this
use case.
> NULL is not handled correctly in join
> -------------------------------------
>
> Key: HIVE-741
> URL: https://issues.apache.org/jira/browse/HIVE-741
> Project: Hadoop Hive
> Issue Type: Bug
> Reporter: Ning Zhang
> Assignee: Amareshwari Sriramadasu
> Attachments: patch-741-1.txt, patch-741-2.txt, patch-741-3.txt,
> patch-741.txt, smbjoin_nulls.q.txt
>
>
> With the following data in table input4_cb:
> Key Value
> ------ --------
> NULL 325
> 18 NULL
> The following query:
> {code}
> select * from input4_cb a join input4_cb b on a.key = b.value;
> {code}
> returns the following result:
> NULL 325 18 NULL
> The correct result should be empty set.
> When 'null' is replaced by '' it works.
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