Hi, It seems SimpleJSON does not support aggregation push-down[1].
Actually, we need a better Grafana connector implementation to solve this problem. [1] https://grafana.com/grafana/plugins/grafana-simple-json-datasource Best, ----------------------------------- Xiangdong Huang School of Software, Tsinghua University 黄向东 清华大学 软件学院 Julian Feinauer (Jira) <j...@apache.org> 于2020年3月1日周日 下午9:04写道： > Julian Feinauer created IOTDB-528: > ------------------------------------- > > Summary: [GRAFANA] Implicitly do GROUP BY to avoid sending to > many data over the wire > Key: IOTDB-528 > URL: https://issues.apache.org/jira/browse/IOTDB-528 > Project: Apache IoTDB > Issue Type: Improvement > Components: Connectors/Grafana > Reporter: Julian Feinauer > > > When using itodb-grafana integration through SimpleJson it seems like it > does not do any aggregation at all. > > In situations where one selects a big time range it should do some > subsampling with group by to limit the number of rows being sent. > > > > -- > This message was sent by Atlassian Jira > (v8.3.4#803005) >
