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From "mehran (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-5201) Returning null
Date Tue, 17 Jan 2017 11:32:27 GMT

     [ https://issues.apache.org/jira/browse/DRILL-5201?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

mehran updated DRILL-5201:
--------------------------
    Description: 
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.









  was:
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.
If we?
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










> Returning null 
> ---------------
>
>                 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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