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From "Hive QA (JIRA)" <>
Subject [jira] [Commented] (HIVE-14310) ORC schema evolution should not completely disable PPD
Date Thu, 28 Jul 2016 18:50:20 GMT


Hive QA commented on HIVE-14310:

Here are the results of testing the latest attachment:

{color:green}SUCCESS:{color} +1 due to 2 test(s) being added or modified.

{color:red}ERROR:{color} -1 due to 5 failed/errored test(s), 10378 tests executed
*Failed tests:*
TestMsgBusConnection - did not produce a TEST-*.xml file

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: 5 tests failed

This message is automatically generated.

ATTACHMENT ID: 12820583 - PreCommit-HIVE-MASTER-Build

> ORC schema evolution should not completely disable PPD
> ------------------------------------------------------
>                 Key: HIVE-14310
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 2.2.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Critical
>         Attachments: HIVE-14310.1.patch, HIVE-14310.2.patch, HIVE-14310.4.patch, HIVE-14310.WIP.patch
> Follow up for HIVE-14214 which completely shuts off PPD when there is any schema evolution.
Some evolutions are safer for PPD like
> byte -> short -> int -> long
> -float -> double- (This is unsafe, see comments in in the patch)
> varchar <-> string (string to char, varchar to char and vice versa is also unsafe
conversion as Orc stores internal index with padded spaces for char)
> For all other conversions we can disable PPD for that specific column that has evolved
by returning TruthValue.YES_NO

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