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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5201) Query bug: null values in result of a conditioned query
Date Wed, 18 Jan 2017 01:40:26 GMT

    [ https://issues.apache.org/jira/browse/DRILL-5201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15827221#comment-15827221

Jinfeng Ni commented on DRILL-5201:

You are right that Drill should not return rows where `a` value is null for query with condition
a=1.  Seems this is a incorrect query issue, which we probably should take a close look.

Can you please provide a small sample dataset that could be used to re-produce the problem
you describe?

> Query bug: null values in result of a conditioned query  
> ---------------------------------------------------------
>                 Key: DRILL-5201
>                 URL: https://issues.apache.org/jira/browse/DRILL-5201
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Client - HTTP
>    Affects Versions: 1.9.0
>            Reporter: mehran
> I have a table with 300 columns.
> When I select a query , some null columns are also returned.
> This is the query that I used.
> "select a,b from dfs.root.`/2016/1/17` where a=1"
> For example in this query some columns are returned that "a" value is null.
> I think null values are problems. Because when I add a condition to it like 
> "select a,b from dfs.root.`/2016/1/17` where a=1 and a IS NOT NULL"
> there is not any change and still NULL values are returned.

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