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https://issues.apache.org/jira/browse/HIVE-13299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15203545#comment-15203545
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Lefty Leverenz commented on HIVE-13299:
---------------------------------------
Agreed it's just a bug fix and we don't usually document those, but
occasionally we do when the bug affects HiveQL behavior. Examples:
* [Create/Drop/Alter Index |
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-Create/Drop/AlterIndex]
* [Describe Table/View/Column (two info boxes at end of section) |
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-DescribeTable/View/Column]
So I thought this might be helpful information for users, but I'll defer to
your judgment.
As for the commits, I have no opinion. I just wanted to be sure Fix Version/s
is correct.
> Column Names trimmed of leading and trailing spaces
> ---------------------------------------------------
>
> Key: HIVE-13299
> URL: https://issues.apache.org/jira/browse/HIVE-13299
> Project: Hive
> Issue Type: Bug
> Components: Parser
> Affects Versions: 2.0.0
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Labels: TODOC2.0
> Fix For: 2.1.0, 2.0.1
>
> Attachments: HIVE-13299.01.patch
>
>
> PROBLEM:
> As per the Hive Language DDL:
> https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL
> In Hive 0.12 and earlier, only alphanumeric and underscore characters are
> allowed in table and column names.
> In Hive 0.13 and later, column names can contain any Unicode character (see
> HIVE-6013). Any column name that is specified within backticks (`) is treated
> literally.
> However column names
> {code}
> ` left` resulted in `left`
> ` middle ` resulted in `middle`
> `right ` resulted in `right`
> `middle space` resulted in `middle space`
> ` middle space ` resulted in `middle space`
> {code}
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