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From "Zelaine Fong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-4321) Difference in results count distinct with min max query on JDK8
Date Fri, 05 Feb 2016 05:43:40 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15133709#comment-15133709
] 

Zelaine Fong commented on DRILL-4321:
-------------------------------------

Since these are floating point values, I would expect differences in precision.  So, I think
these are ok.

> Difference in results count distinct with min max query on JDK8
> ---------------------------------------------------------------
>
>                 Key: DRILL-4321
>                 URL: https://issues.apache.org/jira/browse/DRILL-4321
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 1.4.0
>         Environment: 4 node cluster
>            Reporter: Khurram Faraaz
>              Labels: JDK8SUPPORT
>         Attachments: expected_results.res
>
>
> count distinct query with min max and group by and order by returns incorrect results
on MapR Drill 1.4.0, MapR FS 5.0.0 GA and JDK8
> The difference is in the way we round off values after the decimal when using JDK8.
> Expected results file can be found here
> https://github.com/mapr/drill-test-framework/blob/master/framework/resources/Functional/aggregates/aggregation/count_distinct/with_min_max_c_float_group_by_1_cols.res
> Failing query is Functional/aggregates/aggregation/count_distinct/
> with_min_max_c_float_group_by_1_cols.sql
> {noformat}
> select count(distinct c_float), max(c_float), min(c_float) from alltypes_with_nulls group
by  c_date order by  c_date;
> {noformat}



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