from(bucket: "jmeter")
|> range(start: v.timeRangeStart, stop: v.timeRangeStop)
|> filter(fn: (r) => r["_measurement"] == "jmeter" and r["testRun"]== "${run}")
|> filter(fn: (r) => r["_field"] == "maxAT")
|> group(columns: ["_time"])
|> sum()
|> group()
Denis