[GitHub] [druid] deng2 opened a new issue #10957: doubleMean aggregation metric in subquery cannot be further aggregated

[GitBox <gi...@apache.org>]

deng2 opened a new issue #10957:
URL: https://github.com/apache/druid/issues/10957


   doubleMean aggregation metric in subquery cannot be further aggregated
   
   ### Affected Version
   0.20
   
   ### Description
   I have a groupBy query with subquery. 
   In the subquery, I aggregate the metric with doubleMean. I wish to further aggregate with doubleSum in outer query. It won't work and the result is always 0. Is this expected?
   
   `{
     "queryType": "groupBy",
     "dataSource": {
       "type": "query",
       "query": {
         "queryType": "groupBy",
         "dataSource": "viaops_metric_specguide",
         "intervals": [
           "2020-02-23T04:00+12:00/2020-03-01T04:00+12:00",
           "2020-02-16T04:00+12:00/2020-02-23T04:00+12:00",
           "2020-02-09T04:00+12:00/2020-02-16T04:00+12:00",
           "2020-02-02T04:00+12:00/2020-02-09T04:00+12:00",
           "2020-01-26T04:00+12:00/2020-02-02T04:00+12:00"
         ],
         "filter": {
           "type": "and",
           "fields": [
             {
               "type": "selector",
               "dimension": "metric_name",
               "value": "Successful API Attempt"
             },
             {
               "type": "selector",
               "dimension": "app",
               "value": "Quantum"
             },
             {
               "type": "in",
               "dimension": "api",
               "values": [
                 "",
                 "stbDeviceEdgeRefresh",
                 "deviceEdgeDevices",
                 "avappsTermsAndConditions",
                 "viewingHistoryEdgeViewingHistory",
                 "loginEdgeSessionInfo",
                 "searchEdgeSavedSearchRecent",
                 "searchEdgeUnfiltered",
                 "networkSettingsEdgeSettings",
                 "viewingHistoryEdgeCollated",
                 "watchListEdgeWatchList",
                 "lrmEdgeEntitlements",
                 "companionDevicesEdgeHandoff",
                 "searchedgeV1CatalogUnfiltered",
                 "loginEdgeLogin",
                 "savedSearchEdgeSavedSearch"
               ]
             }
           ]
         },
         "granularity": {
           "type": "period",
           "period": "PT5M",
           "timeZone": "Pacific/Kwajalein",
           "origin": "2020-03-01T04:00+12:00"
         },
         "dimensions": [
           {
             "type": "default",
             "dimension": "app"
           },
           {
             "type": "default",
             "dimension": "metric_name"
           }
         ],
         "aggregations": [
           {
             "type": "doubleMean",
             "name": "__aggr",
             "fieldName": "metric_value"
           }
         ],
         "context": {
           "populateCache": false,
           "useCache": false,
           "serializeDateTimeAsLong": true
         }
       }
     },
     "aggregations": [
       {
         "type": "count",
         "name": "__count"
       },
       {
         "type": "doubleSum",
         "name": "__sum",
         "fieldName": "__aggr"
       }
     ],
     "intervals": [
       "-10000/10000"
     ],
     "granularity": {
       "type": "period",
       "period": "PT1H",
       "timeZone": "Pacific/Kwajalein",
       "origin": "2020-03-01T04:00+12:00"
     },
     "dimensions": [
       {
         "type": "default",
         "dimension": "app"
       },
       {
         "type": "default",
         "dimension": "metric_name"
       }
     ],
     "context": {
       "populateCache": false,
       "useCache": false,
       "serializeDateTimeAsLong": true
     }
   }`


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