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From "Hive QA (JIRA)" <>
Subject [jira] [Commented] (HIVE-16998) Add config to enable HoS DPP only for map-joins
Date Thu, 27 Jul 2017 23:52:00 GMT


Hive QA commented on HIVE-16998:

Here are the results of testing the latest attachment:

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

{color:red}ERROR:{color} -1 due to 12 failed/errored test(s), 11013 tests executed
*Failed tests:*
TestPerfCliDriver - did not produce a TEST-*.xml file (likely timed out) (batchId=235)
org.apache.hadoop.hive.cli.TestMiniLlapCliDriver.testCliDriver[llap_smb] (batchId=144)
org.apache.hadoop.hive.cli.TestMiniTezCliDriver.testCliDriver[explainanalyze_2] (batchId=100)
org.apache.hadoop.hive.metastore.TestHiveMetaStoreStatsMerge.testStatsMerge (batchId=206)
org.apache.hive.hcatalog.api.TestHCatClient.testPartitionRegistrationWithCustomSchema (batchId=179)
org.apache.hive.hcatalog.api.TestHCatClient.testTableSchemaPropagation (batchId=179)

Test results:
Console output:
Test logs:

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: 12 tests failed

This message is automatically generated.

ATTACHMENT ID: 12879205 - PreCommit-HIVE-Build

> Add config to enable HoS DPP only for map-joins
> -----------------------------------------------
>                 Key: HIVE-16998
>                 URL:
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Logical Optimizer, Spark
>            Reporter: Sahil Takiar
>            Assignee: Janaki Lahorani
>         Attachments: HIVE16998.1.patch, HIVE16998.2.patch, HIVE16998.3.patch, HIVE16998.4.patch
> HoS DPP will split a given operator tree in two under the following conditions: it has
detected that the query can benefit from DPP, and the filter is not a map-join (see SplitOpTreeForDPP).
> This can hurt performance if the the non-partitioned side of the join involves a complex
operator tree - e.g. the query {{select count(*) from srcpart where srcpart.ds in (select
max(srcpart.ds) from srcpart union all select min(srcpart.ds) from srcpart)}} will require
running the subquery twice, once in each Spark job.
> Queries with map-joins don't get split into two operator trees and thus don't suffer
from this drawback. Thus, it would be nice to have a config key that just enables DPP on HoS
for map-joins.

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