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https://issues.apache.org/jira/browse/HIVE-2543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13141830#comment-13141830
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jirapos...@reviews.apache.org commented on HIVE-2543:
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/2667/
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Review request for hive, Yongqiang He, Ning Zhang, and namit jain.
Summary
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By explicitely setting the two variable HIVEMERGEMAPFILES and
HIVEMERGEMAPREDFILES to false before compiling the query to build the index, it
guarantees that there will not be a merge task.
This addresses bug HIVE-2543.
https://issues.apache.org/jira/browse/HIVE-2543
Diffs
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trunk/ql/src/java/org/apache/hadoop/hive/ql/index/AggregateIndexHandler.java
1196155
trunk/ql/src/java/org/apache/hadoop/hive/ql/index/compact/CompactIndexHandler.java
1196155
Diff: https://reviews.apache.org/r/2667/diff
Testing
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I ran an explain plan on a command to rebuild an index and verified it did not
contain a merge task.
I also verified all the index related tests still pass.
Thanks,
Kevin
> Compact index table's files merged in creation
> ----------------------------------------------
>
> Key: HIVE-2543
> URL: https://issues.apache.org/jira/browse/HIVE-2543
> Project: Hive
> Issue Type: Bug
> Reporter: Kevin Wilfong
> Assignee: Kevin Wilfong
> Attachments: HIVE-2543.1.patch.txt
>
>
> When a compact index is built there is the possibility of a merge task at the
> end of the task tree. If this happens, the index table's files will no
> longer be sorted.
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