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https://issues.apache.org/jira/browse/HIVE-12742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15072213#comment-15072213
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Pengcheng Xiong commented on HIVE-12742:
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[~gopalv] i have double checked auto_sortmerge_join_2.q before i committed and
it rans OK. pushed to master, branch-2.0. Thanks for the review.
> NULL table comparison within CASE does not work as previous hive versions
> -------------------------------------------------------------------------
>
> Key: HIVE-12742
> URL: https://issues.apache.org/jira/browse/HIVE-12742
> Project: Hive
> Issue Type: Bug
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Attachments: HIVE-12742.01.patch, HIVE-12742.02.patch,
> HIVE-12742.03.patch
>
>
> drop table test_1;
> create table test_1 (id int, id2 int);
> insert into table test_1 values (123, NULL);
> SELECT cast(CASE WHEN id = id2 THEN FALSE ELSE TRUE END AS BOOLEAN) AS b
> FROM test_1;
> --NULL
> But the output should be true (confirmed with postgres.)
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