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From "Victoria Markman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-2217) Trying to flatten an empty list should return an empty result
Date Tue, 15 Sep 2015 17:41:46 GMT

    [ https://issues.apache.org/jira/browse/DRILL-2217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14745802#comment-14745802
] 

Victoria Markman commented on DRILL-2217:
-----------------------------------------

With drill 1.2.0 I see result below and I'm not sure if it is correct ... 

{code}
0: jdbc:drill:schema=dfs> select empty from `data1.json`;
+--------------+
|    empty     |
+--------------+
| [[],[null]]  |
| [[],[null]]  |
+--------------+
2 rows selected (0.167 seconds)

0: jdbc:drill:schema=dfs> select flatten(empty) from `data1.json`;
+---------+
| EXPR$0  |
+---------+
| null    |
| null    |
| null    |
| null    |
+---------+
4 rows selected (0.174 seconds)
{code}

> Trying to flatten an empty list should return an empty result
> -------------------------------------------------------------
>
>                 Key: DRILL-2217
>                 URL: https://issues.apache.org/jira/browse/DRILL-2217
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Relational Operators
>            Reporter: Rahul Challapalli
>            Assignee: Jason Altekruse
>             Fix For: 1.3.0
>
>         Attachments: error.log
>
>
> git.commit.id.abbrev=3d863b5
> Data Set :
> {code}
> {"empty":[[],[[]]]}
> {code}
> Query :
> {code}
> select flatten(empty) from `data1.json`;
> Query failed: RemoteRpcException: Failure while running fragment.[ 1b3123d9-92bc-45d5-bef8-b5f1be9def07
on qa-node191.qa.lab:31010 ]
> [ 1b3123d9-92bc-45d5-bef8-b5f1be9def07 on qa-node191.qa.lab:31010 ]
> {code}
> I also attached the error from the logs



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