[jira] [Updated] (DRILL-3537) Empty Json file can potentially result into wrong results

["Sean Hsuan-Yi Chu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-3537?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Hsuan-Yi Chu updated DRILL-3537:
-------------------------------------
    Fix Version/s: 1.2.0

> Empty Json file can potentially result into wrong results 
> ----------------------------------------------------------
>
>                 Key: DRILL-3537
>                 URL: https://issues.apache.org/jira/browse/DRILL-3537
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Relational Operators, Storage - JSON
>            Reporter: Sean Hsuan-Yi Chu
>            Assignee: Sean Hsuan-Yi Chu
>            Priority: Critical
>             Fix For: 1.2.0
>
>
> In the directory, we have two files. One has some data and the other one is empty. A query as below:
> {code}
> select * from dfs.`directory`;
> {code}
> will produce different results according to the order of the files being read (The default order is in the alphabetic order of the filenames). To give a more concrete example, the non-empty json has data:
> {code}
> {
>       a:1
> }
> {code}
> By naming the files, you can control the orders. If the empty file is read in firstly, the result is
> {code}
> +-------+----+
> |   *   | a  |
> +-------+----+
> | null  | 1  |
> +-------+----+
> {code}
> If the opposite order takes place, the result is
> {code}
> +----+
> | a  |
> +----+
> | 1  |
> | 2  |
> +----+
> {code}



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