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https://issues.apache.org/jira/browse/HIVE-4502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13714800#comment-13714800
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Yin Huai commented on HIVE-4502:
--------------------------------
HIVE-4502.incremental.patch has extra changes I made based on HIVE-4502.patch
(uploaded at 20/Jul/13 17:06). Since in GenMapRedUtils there are three places
that we need to check if we need to need to do tagging, I add a utility method
to check the class of the reducer. We will set needsTagging when the reducer is
JoinOperator or DemuxOperator. Also, some small updates are needed for test
results of those queries related to Correlation Optimizer. Those updates just
replace '#### A masked pattern was here ####' with '$INTNAME'.
> NPE - subquery smb joins fails
> ------------------------------
>
> Key: HIVE-4502
> URL: https://issues.apache.org/jira/browse/HIVE-4502
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.11.0
> Reporter: Vikram Dixit K
> Assignee: Navis
> Attachments: HIVE-4502.D10695.1.patch, HIVE-4502.D10695.2.patch,
> HIVE-4502.D10695.3.patch, HIVE-4502.D10695.4.patch,
> HIVE-4502.incremental.patch, HIVE-4502.patch, smb_mapjoin_25.q,
> smb_mapjoin_25.q
>
>
> Found this issue while running some SMB joins. Attaching test case that
> causes this error.
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