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https://issues.apache.org/jira/browse/HIVE-3795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13534252#comment-13534252
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Gang Tim Liu commented on HIVE-3795:
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very minor comment.
> NPE in SELECT when WHERE-clause is an and/or/not operation involving null
> -------------------------------------------------------------------------
>
> Key: HIVE-3795
> URL: https://issues.apache.org/jira/browse/HIVE-3795
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Xiao Jiang
> Assignee: Xiao Jiang
> Priority: Trivial
> Attachments: HIVE-3795.1.patch.txt, HIVE-3795.2.patch.txt
>
>
> Sometimes users forget to quote date constants in queries. For example,
> SELECT * FROM some_table WHERE ds >= 2012-12-10 and ds <= 2012-12-12; . In
> such cases, if the WHERE-clause contains and/or/not operation, it would throw
> NPE exception. That's because PcrExprProcFactory in ql/optimizer forgot to
> check null.
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