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https://issues.apache.org/jira/browse/HIVE-6393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13925144#comment-13925144
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Lefty Leverenz commented on HIVE-6393:
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This needs wiki documentation and perhaps a release note. (Is the fix version
0.13?)
Here's the Joins doc:
* [Language Manual: Hive Joins
|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Joins]
> Support unqualified column references in Joining conditions
> -----------------------------------------------------------
>
> Key: HIVE-6393
> URL: https://issues.apache.org/jira/browse/HIVE-6393
> Project: Hive
> Issue Type: Improvement
> Reporter: Harish Butani
> Assignee: Harish Butani
> Attachments: HIVE-6393.1.patch, HIVE-6393.2.patch, HIVE-6393.3.patch
>
>
> Support queries of the form:
> {noformat}
> create table r1(a int);
> create table r2(b);
> select a, b
> from r1 join r2 on a = b
> {noformat}
> This becomes more useful in old style syntax:
> {noformat}
> select a, b
> from r1, r2
> where a = b
> {noformat}
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