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https://issues.apache.org/jira/browse/DRILL-3533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14637641#comment-14637641
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Jinfeng Ni commented on DRILL-3533:
-----------------------------------

The full mvn build  ( mvn clean install ) will takes about 30 minutes on my 
machine. But if you skip the unit testcases, it should be much shorter.

Can you try with skipping the unit testcase?

mvn clean install -DskipTests



> null values in a sub-structure in Parquet returns unexpected/misleading 
> results
> -------------------------------------------------------------------------------
>
>                 Key: DRILL-3533
>                 URL: https://issues.apache.org/jira/browse/DRILL-3533
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 1.1.0
>            Reporter: Stefán Baxter
>            Assignee: Parth Chandra
>            Priority: Critical
>
> With this minimal dataset as /tmp/test.json:
> {"dimensions":{"adults":"A"}}
> select lower(p.dimensions.budgetLevel) as `field1`, 
> lower(p.dimensions.adults) as `field2` from dfs.tmp.`/test.json` as p;
> Returns this:
> +---------+---------+
> | field1  | field2  |
> +---------+---------+
> | null    | a       |
> +---------+---------+
> With the same data as a Parquet file
> CREATE TABLE dfs.tmp.`/test` AS SELECT * FROM dfs.tmp.`/test.json`;
> The same query:
> select lower(p.dimensions.budgetLevel) as `field1`, 
> lower(p.dimensions.adults) as `field2` from dfs.tmp.`/test/0_0_0.parquet` as 
> p;
> Return this:
> +---------+---------+
> | field1  | field2  |
> +---------+---------+
> | a       | null    |
> +---------+---------+
> After some more testing it appears that this has nothing to do with trim. 
> (any non existing nested-value will be pushed aside)
> select p.dimensions.budgetLevel as `field1`, lower(p.dimensions.adults) as 
> `field2` from dfs.tmp.`/test/0_0_0.parquet` as p;
> also returns:
> +---------+---------+
> | field1  | field2  |
> +---------+---------+
> | a       | null    |
> +---------+---------+



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