I have a problem querying a csv file with header like this:

```
ID, NOMBRE, APELLIDOS, PROVINCIA
12121212, MARIA, LIONZA, MADRID
12312312, JAIMITO, PEREZ, ALMERÍA
13131313, BRUNO, DIAZ, MALAGA
23423423, HARLEY, QUINN, BARCELONA

```

I am doing it over apache drill UI v1.8. 
When a do the following query 

SELECT \* FROM dfs.'*path\_to\_file*/clientes.csv' it works perfectly and it returns a table like this:
[![enter image description here](https://i.stack.imgur.com/yuPFG.png)](https://i.stack.imgur.com/yuPFG.png) 

But if I do a query specifying the columns names (the headers of the csv file) then some columns are empty for any reason I haven´t figured out yet and is driving me crazy
p.e. this query

SELECT ID, NOMBRE FROM dfs.'*path\_to\_file*/clientes.csv'

Return this

[![enter image description here](https://i.stack.imgur.com/rHetG.png)](https://i.stack.imgur.com/rHetG.png)

Also I edited the dfs plugin and added the property extractHeader to true

```
...
"csv": {
      "type": "text",
      "extensions": [
        "csv"
      ],
      "extractHeader": true,
      "delimiter": ","
    },
...

```

So what I'm doing wrong? why I can query by ID but not by the other fields (header names) like NOMBRE or PROVINCIA. Do you have any idea?