Did you get an answer to this? It looks to me like you can't, which is very weird. I would have expected a Merge Attributes section, like on other transformers. It looks to me like you'll have to follow up with a FeatureMerger transformer to copy info across. Not ideal and definitely worth posting an Idea for.

No, I'm presuming it's not possible. I couldn't decide whether a FeatureMerger would be the best way, or whether to include the UniqueID as a an Attribute to Match, discard the features that only differed by the UniqueID attribute then fetch the value from a list built in the change detector. Or whether if having to use the FeatureMerger anyway, is the ChangeDetector even worth keeping?

I thought I might be missing something, as I thought it might be a common use, to compare records from say an outside source, with an existing table and then want to update the existing table using a unique key that only exists within that table, not the outside source.

Hi @ebygomm, I ran into the same issue. Did you post an idea? I couldn't find it.

Using a FeatureMerger seems the best way to me as well.

No, I didn't get round to posting an idea, it ended up no longer being an issue for the particular workspace i was developing.

I mentioned you and @mark2atsafe​  in the idea. I hope that is fine for you both: https://community.safe.com/s/idea/0874Q000000j0MdQAI/detail

@jelle - the link to the idea is broken but it looks like it’s now possible to preserve original attributes :-)

@ebygomm that is nice!