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Date: Fri, 26 Jun 2015 12:05:04 +0000 (UTC)
From: "Joanlynn LIN (JIRA)" <jira@apache.org>
To: issues@drill.apache.org
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Subject: [jira] [Commented] (DRILL-3370) FLATTEN error with a where clause
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    [ https://issues.apache.org/jira/browse/DRILL-3370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14602772#comment-14602772 ] 

Joanlynn LIN commented on DRILL-3370:
-------------------------------------

OK, I've patched my project and the bug is verified fixed. Thanks a lot to all you guys. Hope to see Drill performs better in memory, distributed cache and also certain types of queries.
Thanks again!

> FLATTEN error with a where clause
> ---------------------------------
>
>                 Key: DRILL-3370
>                 URL: https://issues.apache.org/jira/browse/DRILL-3370
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Functions - Drill
>    Affects Versions: 1.0.0
>            Reporter: Joanlynn LIN
>            Assignee: Jason Altekruse
>             Fix For: 1.1.0
>
>         Attachments: DRILL-3370.patch, jsonarray.150.json
>
>
> I've got a JSON file which contains 150 JSON strings all like this:
> {"arr": [94]}
> {"arr": [39]}
> {"arr": [180]}
> I was trying to Flatten() the arrays and filter the values using such an SQL query:
>     select flatten(arr) as a from dfs.`/data/test/jsonarray.150.json` where a > 100;
> However, it returned no result. Then I modified my expression like this:
> 	select a from (select flatten(arr) as a from dfs.`/data/test/jsonarray.150.json`) where a > 100;
> It then failed:
>     Error: SYSTEM ERROR: org.apache.drill.exec.exception.SchemaChangeException: Failure while trying to materialize incoming schema.  Errors:
>     Error in expression at index -1.  Error: Missing function implementation: [flatten(BIGINT-REPEATED)].  Full expression: --UNKNOWN EXPRESSION--..
>     Fragment 0:0
>     [Error Id: 1d71bf0e-48da-43f8-8b36-6a513120d7e0 on slave2:31010] (state=,code=0)
> After a lot of attempts, I finally got it work:
>     select a from (select flatten(arr) as a from dfs.`/data/test/jsonarray.150.json` limit 10000000) where a > 100;
> See, I just added a "limit 10000000" in this query and I am wondering if this is a bug or what in Drill?
> Looking forward to your attention and help. Many thanks.


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