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https://issues.apache.org/jira/browse/IOTDB-528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17048574#comment-17048574
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Xiangdong Huang commented on IOTDB-528:
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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]
> [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
> Priority: Major
> Labels: performance
>
> 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.
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