Issue adding multiple deltas

[ouraios]

Bug Report

What did you do?
i made this query :
delta(app_stats{statsName="name1"}[5m])+delta(app_stats{statsName="name2"}[5m])+delta(app_stats{statsName="name3"}[5m])

What did you expect to see?
I expected to see the addition result of the 3 deltas
What did you see instead? Under which circumstances?
It returned me an empty result

[brian-brazil]

It makes more sense to ask questions like this on the prometheus-users mailing list rather than in a GitHub issue. On the mailing list, more people are available to potentially respond to your question, and the whole community can benefit from the answers provided.