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From "Fabian Hueske (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (FLINK-3971) Aggregates handle null values incorrectly.
Date Tue, 14 Jun 2016 16:27:57 GMT

     [ https://issues.apache.org/jira/browse/FLINK-3971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Fabian Hueske closed FLINK-3971.
--------------------------------
    Resolution: Fixed

Fixed with fdf43609977c807deb3bb81bf1095efb721fe688

> Aggregates handle null values incorrectly.
> ------------------------------------------
>
>                 Key: FLINK-3971
>                 URL: https://issues.apache.org/jira/browse/FLINK-3971
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API
>    Affects Versions: 1.1.0
>            Reporter: Fabian Hueske
>            Assignee: GaoLun
>            Priority: Critical
>             Fix For: 1.1.0
>
>
> Table API and SQL aggregates are supposed to ignore null values, e.g., {{sum(1,2,null,4)}}
is supposed to return {{7}}. 
> There current implementation is correct if at least one valid value is present however,
is incorrect if only null values are aggregated. {{sum(null, null, null)}} should return {{null}}
instead of {{0}}
> Currently only the Count aggregate handles the case of null-values-only correctly.



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