How to parameterize the DB Row Filter with flow variables (WHERE-IN clause)

Could someone help me with the following problem?

I want to parameterize the DB Row Filter with flow variables. To get familiar with the flow variable configuration I would like to consider a very simple case. The DB Row Filter shall perform the following task: Search in a column ‘Source ID’ for the entries ‘1000001234’ and ‘1000001235’. So, behind the scenes the knot should do the following:

SELECT * FROM mytablename

WHERE SourceID IN (‘1000001234’, ‘1000001235’).

My flow variable tab looks like this.

DB Row Filter Parameterization with Flow Variables.pdf

How do I have to set up the parameters?

Thanks a lot for your support!

Heiko