Untitled

with
  errors = spans count | delta | filter (("service" == "delivery-information-provider/api") && ("operation" == "convenience_options") && ("error" == true)) | group_by ["request.cfa.id", "request.country"], sum;
  total = spans count | delta | filter (("service" == "delivery-information-provider/api") && ("operation" == "convenience_options")) | group_by ["request.cfa.id", "request.country"], sum;
join (errors / total), errors=0, total=0