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https://issues.apache.org/jira/browse/HIVE-11703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14734032#comment-14734032
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Pengcheng Xiong commented on HIVE-11703:
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[~leftylev], thanks for your comments. I have modified the wiki accordingly.
> Make RegExp and RLike reserved keywords
> ---------------------------------------
>
> Key: HIVE-11703
> URL: https://issues.apache.org/jira/browse/HIVE-11703
> Project: Hive
> Issue Type: Sub-task
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Fix For: 2.0.0
>
>
> RegExp and RLike are treated as "precedenceEqualNegatableOperator" in Hive.
> They actually come from MySQL. Both of them are not keywords in SQL2011. But
> they are reserved keywords in MySQL. Making them reserved ones can eliminate
> the current 14 ambiguities that we have in current Hive. If users still would
> like to use them as identifiers/function names, users can "set
> hive.support.sql11.reserved.keywords=false;"
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