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https://issues.apache.org/jira/browse/DRILL-3370?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Altekruse resolved DRILL-3370.
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Resolution: Fixed
Fixed in a915085e8a8b4255ff659086d047cc5dd874a5bf
> 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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