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https://issues.apache.org/jira/browse/HIVE-20278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16570642#comment-16570642
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Hive QA commented on HIVE-20278:
--------------------------------
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12934516/HIVE-20278.patch
{color:green}SUCCESS:{color} +1 due to 1 test(s) being added or modified.
{color:green}SUCCESS:{color} +1 due to 14865 tests passed
Test results:
https://builds.apache.org/job/PreCommit-HIVE-Build/13063/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/13063/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-13063/
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.YetusPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12934516 - PreCommit-HIVE-Build
> Druid Scan Query avoid copying from List -> Map -> List
> -------------------------------------------------------
>
> Key: HIVE-20278
> URL: https://issues.apache.org/jira/browse/HIVE-20278
> Project: Hive
> Issue Type: Improvement
> Reporter: Nishant Bangarwa
> Assignee: Nishant Bangarwa
> Priority: Major
> Labels: PERFORMANCE
> Attachments: HIVE-20278.patch
>
>
> DruidScanQueryRecordReader gets a compacted List<Object> from druid. It then
> converts that list into a Map<String,Object> as DruidWritable where key is
> the column name.
> At the second stage DruidSerde takes this DruidWritable and creates a List
> out out of the map again. We can avoid the map creation part by reading the
> list sent by druid directly in the DruidSerde.deserialize() method.
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