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From "Pengcheng Xiong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-10120) Disallow create table with dot/colon in column name
Date Mon, 20 Apr 2015 21:27:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-10120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14503683#comment-14503683
] 

Pengcheng Xiong commented on HIVE-10120:
----------------------------------------

[~jpullokkaran] and [~ashutoshc], I checked Hive 0.13,0.14,1.1, in all of these versions,
it throws exception if we would like to select the column with dot/colon. And, in the previous
patch, I already included negative tests. Thus, I think it is ready to go. Thanks.

> Disallow create table with dot/colon in column name
> ---------------------------------------------------
>
>                 Key: HIVE-10120
>                 URL: https://issues.apache.org/jira/browse/HIVE-10120
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>         Attachments: HIVE-10120.01.patch, HIVE-10120.02.patch
>
>
> Since we don't allow users to query column names with dot in the middle such as emp.no,
don't allow users to create tables with such columns that cannot be queried. Fix the documentation
to reflect this fix.
> Here is an example. Consider this table:
> {code}
> CREATE TABLE a (`emp.no` string);
> select `emp.no` from a; fails with this message:
> FAILED: RuntimeException java.lang.RuntimeException: cannot find field emp from [0:emp.no]
> {code}
> The hive documentation needs to be fixed:
> {code}
>  (https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL) seems to  indicate
that any Unicode character can go between the backticks in the select statement, but it doesn’t
like the dot/colon or even select * when there is a column that has a dot/colon. 
> {code}



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