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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4324) ORC Turn off dictionary encoding when number of distinct keys is greater than threshold
Date Mon, 12 Aug 2013 03:42:48 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13736542#comment-13736542
] 

Hudson commented on HIVE-4324:
------------------------------

SUCCESS: Integrated in Hive-trunk-h0.21 #2261 (See [https://builds.apache.org/job/Hive-trunk-h0.21/2261/])
HIVE-4324 : ORC Turn off dictionary encoding when number of distinct keys is greater than
threshold (Kevin Wilfong & Owen Omalley via Ashutosh Chauhan) (hashutosh: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1512893)
* /hive/trunk/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
* /hive/trunk/conf/hive-default.xml.template
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/orc/OrcFile.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/orc/OutStream.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/orc/RecordReaderImpl.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/orc/StringRedBlackTree.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/orc/WriterImpl.java
* /hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/io/orc/TestFileDump.java
* /hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/io/orc/TestOrcFile.java
* /hive/trunk/ql/src/test/queries/clientpositive/orc_dictionary_threshold.q
* /hive/trunk/ql/src/test/resources/orc-file-dump-dictionary-threshold.out
* /hive/trunk/ql/src/test/results/clientpositive/orc_dictionary_threshold.q.out

                
> ORC Turn off dictionary encoding when number of distinct keys is greater than threshold
> ---------------------------------------------------------------------------------------
>
>                 Key: HIVE-4324
>                 URL: https://issues.apache.org/jira/browse/HIVE-4324
>             Project: Hive
>          Issue Type: Sub-task
>          Components: File Formats
>    Affects Versions: 0.11.0
>            Reporter: Kevin Wilfong
>            Assignee: Kevin Wilfong
>             Fix For: 0.12.0
>
>         Attachments: HIVE-4324.1.patch.txt, HIVE-4324.D12045.1.patch, HIVE-4324.D12045.2.patch,
HIVE-4324.D12045.2.patch, HIVE-4324.D12045.3.patch
>
>
> Add a configurable threshold so that if the number of distinct values in a string column
is greater than that fraction of non-null values, dictionary encoding is turned off.

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