Check whether tag_cardinality_limit transform has acted on an event (metric) in downstream transformers

[ali-sattari]

Hello!

Imagine I am using tag_cardinality_limit transform to curb tags with drop_tag action. I want to be able to distinguish between metrics that have been affected by that transform, and those who passed through untouched. Use case would be to log them somewhere, or attach a tag to them to mark this and act on it in destination.

Is there a way to get that info from some metadata using a remap transform or something? In other words, do transforms in general, and tag_cardinality_limit in particular, leave a mark on the event that they modified it?

[spencergilbert]

Hi @ali-sattari - I don't believe we do today, but that does seem like a reasonable enhancement to make. Know the remap transform can end up injecting metadata that's similar so there's definitely some existing patterns we can look to.

Would you mind opening a new feature request issue?

[ali-sattari]

Thanks @spencergilbert, opened an issue here.