Too many series returned when using rolled-up data and specifying single tag key #1083
Description
When using rolled-up data in 2.4RC2, specifying a single tag value directly returns multiple series when 1 series was expected. Putting tag value inside of regexp returns 1 series for rolled-up data as expected. Using data from default interval also works as expected.
Test data was sent using the api/rollup endpoint for multiple timestamps.
test_data = [{"metric": "sys.cpu.nice",
"timestamp": ts,
"value": 18,
"tags": {"host": "web01",
"dc": "lga"},
"interval": "1h",
"aggregator": "SUM"},
{"metric": "sys.cpu.nice",
"timestamp": ts,
"value": 9,
"tags": {"host": "web02",
"dc": "lga"},
"interval": "1h",
"aggregator": "SUM"}]
Query was
/api/query?start=2d-ago&m=sum:1h-sum-none:sys.cpu.nice{host=web01}
response was
[{"metric":"sys.cpu.nice","tags":{"host":"web01","_aggregate":"RAW","dc":"lga"},"aggregateTags":[],"dps":{"1507762800":18.0,<truncated>}},{"metric":"sys.cpu.nice","tags":{"host":"web02","_aggregate":"RAW","dc":"lga"},"aggregateTags":[],"dps":{"1507762800":9.0,<truncated}}]