hadoop-hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-790) race condition related to ScriptOperator + UnionOperator
Date Tue, 25 Aug 2009 15:16:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12747455#action_12747455
] 

He Yongqiang commented on HIVE-790:
-----------------------------------

This query can not be compiled with the truck code.

> race condition related to ScriptOperator + UnionOperator
> --------------------------------------------------------
>
>                 Key: HIVE-790
>                 URL: https://issues.apache.org/jira/browse/HIVE-790
>             Project: Hadoop Hive
>          Issue Type: Bug
>            Reporter: Zheng Shao
>
> ScriptOperator uses a second thread to output the rows to the children operators. In
a corner case which contains a union, 2 threads might be outputting data into the same operator
hierarchy and caused race conditions.
> {code}
> SELECT *
> FROM (
>     SELECT TRANSFORM(cola)
>     USING 'cat'
>     AS cola
>     FROM tablea
>   UNION ALL
>     SELECT cola
>     FROM tablea
> ) a;
> {code}

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message