hellobabygogo opened a new issue #6085: SQL bug of avg function URL: https://github.com/apache/incubator-druid/issues/6085 `{ "query":"explain plan for select AVG(queryTime) from druid_request_log where __time >= timestamp '2018-08-01 16:19:09' group by dataSource ", "context":{"sqlTimeZone":"Asia/Shanghai"} }` `[ { "PLAN": "DruidQueryRel(dataSource=[druid_request_log], intervals=[[2018-08-01T08:19:09.000Z/146140482-04-24T15:36:27.903Z]], dimensions=[[DefaultDimensionSpec{dimension='dataSource', outputName='d0', outputType='STRING'}]], aggregations=[[Aggregation{aggregatorFactories=[LongSumAggregatorFactory{fieldName='queryTime', expression='null', name='A0:sum'}, CountAggregatorFactory{name='A0:count'}], postAggregator=ArithmeticPostAggregator{name='a0', fnName='quotient', fields=[FieldAccessPostAggregator{name='null', fieldName='A0:sum'}, FieldAccessPostAggregator{name='null', fieldName='A0:count'}], op=QUOTIENT}, finalizingPostAggregatorFactory=null}]])\n" } ]` the avg fucntion defined in calcite avg(x) = sum(x) / count(X). but if the metric x is longSum aggregator the avg(x) = sum(x) / sum('"count").
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