[
https://issues.apache.org/jira/browse/HIVE-4324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Phabricator updated HIVE-4324:
------------------------------
Attachment: HIVE-4324.D12045.1.patch
omalley requested code review of "HIVE-4324 [jira] ORC Turn off dictionary
encoding when number of distinct keys is greater than threshold".
Reviewers: JIRA
forward port of kevin's 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.
TEST PLAN
EMPTY
REVISION DETAIL
https://reviews.facebook.net/D12045
AFFECTED FILES
common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
conf/hive-default.xml.template
ql/src/java/org/apache/hadoop/hive/ql/io/orc/OrcFile.java
ql/src/java/org/apache/hadoop/hive/ql/io/orc/OutStream.java
ql/src/java/org/apache/hadoop/hive/ql/io/orc/RecordReaderImpl.java
ql/src/java/org/apache/hadoop/hive/ql/io/orc/StringRedBlackTree.java
ql/src/java/org/apache/hadoop/hive/ql/io/orc/WriterImpl.java
ql/src/test/org/apache/hadoop/hive/ql/io/orc/TestFileDump.java
ql/src/test/org/apache/hadoop/hive/ql/io/orc/TestOrcFile.java
ql/src/test/queries/clientpositive/orc_dictionary_threshold.q
ql/src/test/resources/orc-file-dump-dictionary-threshold.out
ql/src/test/results/clientpositive/orc_dictionary_threshold.q.out
MANAGE HERALD RULES
https://reviews.facebook.net/herald/view/differential/
WHY DID I GET THIS EMAIL?
https://reviews.facebook.net/herald/transcript/28797/
To: JIRA, omalley
> 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
> Attachments: HIVE-4324.1.patch.txt, HIVE-4324.D12045.1.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.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
