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From "Jason Altekruse (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-2838) Applying flatten after joining 2 sub-queries returns empty maps
Date Thu, 09 Jul 2015 00:17:04 GMT

     [ https://issues.apache.org/jira/browse/DRILL-2838?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Altekruse updated DRILL-2838:
-----------------------------------
    Assignee: Hanifi Gunes  (was: Jason Altekruse)

> Applying flatten after joining 2 sub-queries returns empty maps
> ---------------------------------------------------------------
>
>                 Key: DRILL-2838
>                 URL: https://issues.apache.org/jira/browse/DRILL-2838
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Relational Operators
>            Reporter: Rahul Challapalli
>            Assignee: Hanifi Gunes
>            Priority: Critical
>             Fix For: 1.2.0
>
>         Attachments: DRILL-2838.patch, data.json
>
>
> git.commit.id.abbrev=5cd36c5
> The below query applies flatten after joining 2 subqueries. It generates empty maps which
is wrong
> {code}
> select v1.uid, flatten(events), flatten(transactions) from 
>     (select uid, events from `data.json`) v1
> inner join
>     (select uid, transactions from `data.json`) v2
> on v1.uid = v2.uid;
> +------------+------------+------------+
> |    uid     |   EXPR$1   |   EXPR$2   |
> +------------+------------+------------+
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 1          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> | 2          | {}         | {}         |
> +------------+------------+------------+
> 36 rows selected (0.244 seconds)
> {code}
> I attached the data set. Let me know if you have any questions.



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