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https://issues.apache.org/jira/browse/DRILL-5201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15829409#comment-15829409
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mehran commented on DRILL-5201:
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I restarted drillbit and the issue disappeared.
I look in detail into the problem and I will give further information in case
of capturing the problem again.
> 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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