Problem connecting to external PostgreSQL DB using connector

Bonita BPM 6.5.2. Community PostgreSQL 9.4

I am very new in using Bonita. I am studying it to use in production. I stuck in pretty simply task. I need to create connectors in order to get and update data from/in external client base (PostgreSQL). I created connector in lane, entered correct info for connecting to the database but can't event test connection with simple queries.

Here are my steps:

1. Choose connector - PostgreSQL 9.2.

2. Choose driver - PostgreSQL.

3. Enter DB access information. DB is hosted locally.

1. Put simple test SQL query. Further I did not choose any additional dependencies.

1. Here I suppose to see information from the table, but I got this (and have no I what to do with it):

1. Then I tried another query with choosing dependency:

With a bit different result:

I supposed that using DB connector will allow to use pure SQL queries without the need of Groovy scripting or Java code, at least for simple tasks.

I would be grateful for any hint and advise. Thank you!