[GitHub] [druid] BigRantLing edited a comment on issue #10236: How to implement "case when" by Native queries

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

BigRantLing edited a comment on issue #10236:
URL: https://github.com/apache/druid/issues/10236#issuecomment-670444651


    @Mxdcp, Hi，
   [Druid filtered aggregator](https://druid.apache.org/docs/latest/querying/aggregations.html#filtered-aggregator)  may be help you . I think it can be parsed to native query like below:    
   
   ```json 
   {
       "queryType":"queryType",
       ....
       "aggregations":[
           {
               "type":"filtered",
               "filter":{
                   "type":"selector",
                   "dimension":"column_A",
                   "value":"value_one"
               },
               "aggregator":{
                   "type":"longSum",
                   "fieldName":"column_B",
                   "name":"sum_B"
               }
           },
           {
               "type":"filtered",
               "filter":{
                   "type":"selector",
                   "dimension":"column_A",
                   "value":"value_two"
               },
               "aggregator":{
                   "type":"longSum",
                   "fieldName":"column_D",
                   "name":"sum_D"
               }
           }
       ]
   }
   ```


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