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Posted to issues@drill.apache.org by "Rahul Challapalli (JIRA)" <ji...@apache.org> on 2015/04/21 19:34:59 UTC
[jira] [Updated] (DRILL-2838) Applying flatten after joining 2
sub-queries returns empty maps
[ https://issues.apache.org/jira/browse/DRILL-2838?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rahul Challapalli updated DRILL-2838:
-------------------------------------
Attachment: data.json
> 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: Chris Westin
> Priority: Critical
> Attachments: 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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