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From "Sumit Kumar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7097) The Support for REGEX Column Broken in HIVE 0.13
Date Thu, 26 Jun 2014 20:01:25 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14045084#comment-14045084
] 

Sumit Kumar commented on HIVE-7097:
-----------------------------------

Basically this doesn't seem to be an issue but it would help if we clarify this in [Select
documentation|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Select] as well
. 

> The Support for REGEX Column Broken in HIVE 0.13
> ------------------------------------------------
>
>                 Key: HIVE-7097
>                 URL: https://issues.apache.org/jira/browse/HIVE-7097
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.13.0
>            Reporter: Sun Rui
>
> The Support for REGEX Column is OK in HIVE 0.12, but is broken in HIVE 0.13.
> For example:
> {code:sql}
> select `key.*` from src limit 1;
> {code}
> will fail in HIVE 0.13 with the following error from SemanticAnalyzer:
> {noformat}
> FAILED: SemanticException [Error 10004]: Line 1:7 Invalid table alias or column reference
'key.*': (possible column names are: key, value)
> {noformat}
> This issue is related to HIVE-6037. When set "hive.support.quoted.identifiers=none",
the issue will be gone.
> I am not sure the configuration was intended to break regex column. But at least the
documentation needs to be updated: https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Select#LanguageManualSelect-REGEXColumnSpecification
> I would argue backward compatibility is more important.



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