Hi Niek,

That is a bug; thank you for digging out the exact location. Please open a 
ticket <https://issues.apache.org/jira/browse/DRILL>. Let’s start tracking the 
details of the fix in that ticket.

Thank you,
Sudheesh

> On Sep 15, 2016, at 2:49 AM, Niek Bartholomeus <n...@pulsar-it.be> wrote:
> 
> Hi,
> 
> I'm using the drill rest api to query my parquet files that were generated by 
> spark.
> 
> I noticed that numeric and boolean data types are all converted to string in 
> the results. Nested data however is returned with the original data types 
> intact.
> 
> Probably this is happening here: 
> https://github.com/apache/drill/blob/2d9f9abb4c47d08f8462599c8d6076a61a1708fe/exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/QueryWrapper.java#L158
> 
> Is there any way how to fix this?
> 
> I'm using the latest version of drill.
> 
> Thanks in advance,
> 
> Niek.

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