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From "David Mollitor (Jira)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-23176) Remove SELECT REGEX Column Feature
Date Fri, 08 May 2020 13:33:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-23176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17102594#comment-17102594
] 

David Mollitor commented on HIVE-23176:
---------------------------------------

[~jcamachorodriguez] We talked about this one in the context of [HIVE-19064].  Any thoughts?

> Remove SELECT REGEX Column Feature
> ----------------------------------
>
>                 Key: HIVE-23176
>                 URL: https://issues.apache.org/jira/browse/HIVE-23176
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: David Mollitor
>            Assignee: David Mollitor
>            Priority: Major
>              Labels: backwards-incompatible
>         Attachments: HIVE-23176.1.patch, HIVE-23176.2.patch, HIVE-23176.3.patch, HIVE-23176.4.patch,
HIVE-23176.4.patch
>
>
> Remove the Hive feature: REGEX Column.
>  
> Hive has this interesting feature for doing REGEX to SELECT multiple columns.  This
needs to go.  It is not SQL standard and as currently implemented, it is impossible to determine
if a column identifier is a REGEX or the actual name of the column.  If a column name is
enclosed in back ticks then any UTF-8 character is a valid table name.
>  
> [https://dev.mysql.com/doc/refman/8.0/en/identifiers.html]
> [https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Select]



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