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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-15474) Extend limit propagation for chain of RS-GB-RS operators
Date Thu, 05 Jan 2017 13:56:58 GMT

    [ https://issues.apache.org/jira/browse/HIVE-15474?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15801404#comment-15801404
] 

Hive QA commented on HIVE-15474:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12845788/HIVE-15474.03.patch

{color:green}SUCCESS:{color} +1 due to 1 test(s) being added or modified.

{color:red}ERROR:{color} -1 due to 9 failed/errored test(s), 10915 tests executed
*Failed tests:*
{noformat}
TestDerbyConnector - did not produce a TEST-*.xml file (likely timed out) (batchId=233)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[case_sensitivity] (batchId=61)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[input_testxpath] (batchId=28)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[udf_coalesce] (batchId=75)
org.apache.hadoop.hive.cli.TestMiniLlapCliDriver.testCliDriver[orc_ppd_basic] (batchId=134)
org.apache.hadoop.hive.cli.TestMiniLlapCliDriver.testCliDriver[orc_ppd_schema_evol_3a] (batchId=135)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[offset_limit_ppd_optimizer]
(batchId=150)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[vector_if_expr] (batchId=139)
org.apache.hadoop.hive.cli.TestMiniTezCliDriver.testCliDriver[explainanalyze_3] (batchId=92)
{noformat}

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/2800/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/2800/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-2800/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 9 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12845788 - PreCommit-HIVE-Build

> Extend limit propagation for chain of RS-GB-RS operators
> --------------------------------------------------------
>
>                 Key: HIVE-15474
>                 URL: https://issues.apache.org/jira/browse/HIVE-15474
>             Project: Hive
>          Issue Type: Bug
>          Components: Physical Optimizer
>    Affects Versions: 2.2.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>         Attachments: HIVE-15474.01.patch, HIVE-15474.03.patch, HIVE-15474.patch
>
>
> The goal is to extend the work started in HIVE-14002.
> For instance, given the following query:
> {code:sql}
> explain
> select key, value, count(key + 1) as agg1 from src 
> group by key, value
> order by key, value, agg1 limit 20;
> {code}
> We generate the following physical plan:
> {{TS1 - GBY2 - RS3 - GBY4 - RS5 - SEL6 - LIM7 - FS8}}
> We can push the limit to RS3 operator, as we will generate records for the _top N_ keys,
and thus, GBY4 will produce the _top N_ results. However, currently we do not do it.



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