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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-1060) disable SELECT * FROM a JOIN b ON key
Date Tue, 26 Jan 2010 21:38:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12805216#action_12805216
] 

Zheng Shao commented on HIVE-1060:
----------------------------------

One more question:

Can you find out why the follow-on semantic analysis didn't catch this problem?
The column reference should end up with "ambiguous column" since both tables have this column,
but apparently it didn't.


> disable SELECT * FROM a JOIN b ON key
> -------------------------------------
>
>                 Key: HIVE-1060
>                 URL: https://issues.apache.org/jira/browse/HIVE-1060
>             Project: Hadoop Hive
>          Issue Type: Bug
>    Affects Versions: 0.5.0, 0.6.0
>            Reporter: Zheng Shao
>            Assignee: Vikram Chandrasekhar
>         Attachments: HIVE-1060.1.patch
>
>
> In some SQL dialect, we support this kind of syntax as a shortcut of "a.key = b.key".
> We should output an error for this. Currently we are allowing this because we might have
implicit type conversion from String to Boolean.

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