在我的 Druid 数据源中,我在其中一个字段上有一个 hyperUnique 聚合(摄取时间)。
我正在尝试COUNT(DISTINCT(<hyperunique_field>))
在这个聚合字段上做相当于。
Calcite Druid Adapter 是否支持它?如果是这样,正确的方法是什么?
在胶合板中,我可以做到COUNT_DISTINCT
。运行此返回 0 个计数。
SQL:
选择 floor("__time" to HOUR) time_bucket,"field_1", count(distinct("ingestion_time_aggregated_field")) as uniq from "datasource" where "__time" between '2017-01-01 00:00:00' 和 '2017 -01-02 00:00:00' and “field_1” in ('value_1') and “field_2”='value_2' and “field_3”='value_3' and “field_4”='value_4' group by floor("__time " to HOUR),”field_1" order by floor("__time" to HOUR);
摄取时间聚合字段:
{"name": "ingestion_time_aggregated_field", "type": "hyperUnique","fieldName": “field” }