How do I use oracledb?

I've been trying to query from a oracle db using the node-red-contrib-oracledb-mod but it simply wont work.

Here is the query : SELECT * FROM UPNIVEL2

Field Mapping:
[ "location.of.first.array.index.field.in.msg.payload", "location.of.second.array.index.field", "last_array_indexfield.in[3]" ]

but it outputs this:

image

EDIT:
it connected with no problems, btw.
image