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https://issues.apache.org/jira/browse/HIVE-12742?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pengcheng Xiong updated HIVE-12742:
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Attachment: HIVE-12742.02.patch
address the "CASE" case too. Add test case for non-cbo too.
> 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
>
>
> 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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