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https://issues.apache.org/jira/browse/HIVE-1740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13041913#comment-13041913
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Eric Hassold commented on HIVE-1740:
------------------------------------

The IN operator is turned into a different AST, which root is TOK_FUNCTION 
(that is, TOK_FUNCTION^ KW_IN ...), and that's probably why KW_IN wasn't part 
of precedenceEqualExpression either. If putting KW_IN into 
precedenceEqualNegatableOperator, this would require testing operator after -> 
to generate this different AST when operator is KW_IN, which IMHO would end up 
in a more complex and less readable change. Does it make sense?

> support NOT IN and NOT LIKE syntax
> ----------------------------------
>
>                 Key: HIVE-1740
>                 URL: https://issues.apache.org/jira/browse/HIVE-1740
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>    Affects Versions: 0.6.0
>            Reporter: John Sichi
>            Assignee: Eric Hassold
>         Attachments: HIVE-1740.1.patch.txt
>
>
> Hive should support standard SQL syntax
> x NOT LIKE p
> x NOT IN (...)

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