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https://issues.apache.org/jira/browse/HIVE-11531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15063320#comment-15063320
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Hui Zheng commented on HIVE-11531:
----------------------------------
Hi [~sershe] and [~prasanth_j]
The union9 is good in my local machine.Could you give more details about how to
reproduce it?
{code}
mvn test -Dtest=TestCliDriver -Dqfile=union9.q,offset_limit.q
......
[INFO] Executed tasks
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @
hive-it-qfile-spark ---
[INFO] Compiling 3 source files to
/Users/huzheng/git/hive/itests/qtest-spark/target/test-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.16:test (default-test) @ hive-it-qfile-spark
---
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Hive Integration - Parent ......................... SUCCESS [1.191s]
[INFO] Hive Integration - Custom Serde ................... SUCCESS [1.955s]
[INFO] Hive Integration - HCatalog Unit Tests ............ SUCCESS [2.974s]
[INFO] Hive Integration - Testing Utilities .............. SUCCESS [2.312s]
[INFO] Hive Integration - Unit Tests ..................... SUCCESS [4.672s]
[INFO] Hive Integration - Test Serde ..................... SUCCESS [0.326s]
[INFO] Hive Integration - QFile Tests .................... SUCCESS [1:35.067s]
[INFO] Hive Integration - QFile Accumulo Tests ........... SUCCESS [2.523s]
[INFO] JMH benchmark: Hive ............................... SUCCESS [0.399s]
[INFO] Hive Integration - Unit Tests - Hadoop 2 .......... SUCCESS [1.358s]
[INFO] Hive Integration - Unit Tests with miniKdc ........ SUCCESS [1.407s]
[INFO] Hive Integration - QFile Spark Tests .............. SUCCESS [3.650s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1:58.710s
[INFO] Finished at: Fri Dec 18 11:18:28 JST 2015
[INFO] Final Memory: 164M/875M
[INFO] ------------------------------------------------------------------------
{code}
> Add mysql-style LIMIT support to Hive, or improve ROW_NUMBER performance-wise
> -----------------------------------------------------------------------------
>
> Key: HIVE-11531
> URL: https://issues.apache.org/jira/browse/HIVE-11531
> Project: Hive
> Issue Type: Improvement
> Components: CBO
> Reporter: Sergey Shelukhin
> Assignee: Hui Zheng
> Fix For: 2.1.0
>
> Attachments: HIVE-11531.02.patch, HIVE-11531.03.patch,
> HIVE-11531.04.patch, HIVE-11531.05.patch, HIVE-11531.06.patch,
> HIVE-11531.07.patch, HIVE-11531.WIP.1.patch, HIVE-11531.WIP.2.patch,
> HIVE-11531.patch
>
>
> For any UIs that involve pagination, it is useful to issue queries in the
> form SELECT ... LIMIT X,Y where X,Y are coordinates inside the result to be
> paginated (which can be extremely large by itself). At present, ROW_NUMBER
> can be used to achieve this effect, but optimizations for LIMIT such as TopN
> in ReduceSink do not apply to ROW_NUMBER. We can add first class support for
> "skip" to existing limit, or improve ROW_NUMBER for better performance
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