[jira] [Commented] (HIVE-5872) Make UDAFs such as GenericUDAFSum report accurate precision/scale for decimal types

["Hive QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-5872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13838267#comment-13838267 ] 

Hive QA commented on HIVE-5872:
-------------------------------



{color:red}Overall{color}: -1 at least one tests failed

Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12616853/HIVE-5872.2.patch

{color:red}ERROR:{color} -1 due to 1 failed/errored test(s), 4451 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver_decimal_precision
{noformat}

Test results: http://bigtop01.cloudera.org:8080/job/PreCommit-HIVE-Build/500/testReport
Console output: http://bigtop01.cloudera.org:8080/job/PreCommit-HIVE-Build/500/console

Messages:
{noformat}
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: 1 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12616853

> Make UDAFs such as GenericUDAFSum report accurate precision/scale for decimal types
> -----------------------------------------------------------------------------------
>
>                 Key: HIVE-5872
>                 URL: https://issues.apache.org/jira/browse/HIVE-5872
>             Project: Hive
>          Issue Type: Improvement
>          Components: Types, UDF
>    Affects Versions: 0.12.0
>            Reporter: Xuefu Zhang
>            Assignee: Xuefu Zhang
>         Attachments: HIVE-5872.1.patch, HIVE-5872.2.patch, HIVE-5872.patch
>
>
> Currently UDAFs are still reporting system default precision/scale (38, 18) for decimal results. Not only this is coarse, but also this can cause problems in subsequent operators such as division, where the result is dependent on the precision/scale of the input, which can go out of bound (38,38). Thus, these UDAFs should correctly report the precision/scale of the result.



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