sh-learn opened a new issue #6089: Use Filtered Aggregator return null but expect 0 URL: https://github.com/apache/incubator-druid/issues/6089 I recently encountered a problem with druid. When using the filter aggregator to count the total number of times a condition is met, since there is no data that satisfies the filter condition, it returns null when LongSum is performed, but expects to return 0. I don't know if there is a solution? The version of druid used is 0.10.1. filtered aggregator: { "type": "filtered", "filter": { "type": "selector", "dimension": "xxx", "value": "yyy" }, "aggregator": { "type": "longSum", "name": "value", "fieldName": "zzz" } } result: { "version" : "v1", "timestamp" : "2018-08-01T00:00:00.000+08:00", "event" : { "value" : null }
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