[Bug]: Dimension lookup/update transform: Forced to choose a stream field in Lookup mode

[gutknecht]

Apache Hop version?

2.9

Java version?

17.0.1

Operating system

macOS

What happened?

Example Scenario:
I have a table with institutions and places with validfrom to validto values:

For a certain date and an institution_id I want to retrieve the places:

For that I uncheck in the fields tab the "Update the dimesion?" option (so I will be working only in the lookup mode)

While being able to correctly choose the "Dimension field", I also have to select a 2. column with the title "New name of output field" which is a dropdown with the incoming stream field.

Leaving that 2. column empty will either create an error in the GUI (SWTException: Widget is disposed) or later when runing the pipline (Dimension lookup/update 2.0 - Key field [null] couldn't be found)

In the lookup mode there is however no need to choose a stream field. Instead the field should should be empty by default, or can be used to rename the looked up database field (as the titel already suggest)

Issue Priority

Priority: 2

Issue Component

Component: Transforms