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Date: Fri, 19 Sep 2014 02:39:33 +0000 (UTC)
From: "Sergey Shelukhin (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
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Subject: [jira] [Commented] (HIVE-8186) CBO Trunk Merge: join_vc fails
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    [ https://issues.apache.org/jira/browse/HIVE-8186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14139897#comment-14139897 ] 

Sergey Shelukhin commented on HIVE-8186:
----------------------------------------

{noformat}select t1.BLOCK__OFFSET__INSIDE__FILE,t2.BLOCK__OFFSET__INSIDE__FILE
from src t1 join src t2 on t1.key = t2.key;{noformat}
Passes
{noformat}select t2.BLOCK__OFFSET__INSIDE__FILE
from src t1 join src t2 on t1.key = t2.key;{noformat}
Fails.

The issue is that LazyBinarySerDe OI receives data intended for UnionStructObjectInspector.
Judging by the above it has something to do with scanning table once for two aliases.

I'll look tomorrow

> CBO Trunk Merge: join_vc fails
> ------------------------------
>
>                 Key: HIVE-8186
>                 URL: https://issues.apache.org/jira/browse/HIVE-8186
>             Project: Hive
>          Issue Type: Sub-task
>          Components: CBO
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>         Attachments: HIVE-8186.patch
>
>
> Simplified query appears to fail in CBO branch even with CBO disabled. I'm looking...


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