[GitHub] ashukhira commented on issue #5440: Superset Druid Query Error

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ashukhira commented on issue #5440: Superset Druid Query Error
URL: https://github.com/apache/incubator-superset/issues/5440#issuecomment-406967248
 
 
   Hi,
   
   1) - Above issue coming when passing following in limitSpec with Column node . Below funky limitSpec generated by superset 0.25.6 . And druid not getting to understood below funky limitSpec.  If we   remove limitSpec column then it works well. 
   
   So here want to know why superset adding such limitSpec?? Is such limitSpec supported by druid-0.12.
   "limitSpec": {"columns": [{"dimension": {"aggregate": "SUM","column": {"column_name": "impressions","description": null,"expression": null,"filterable": false,"groupby": false,"is_dttm": null,"optionName": "_col_impressions","type": "doubleSum","verbose_name": null},"expressionType": "SIMPLE","fromFormData": false,"hasCustomLabel": false,"label": "SUM(impressions)","optionName": "metric_6nkhk39wj0j_ym12qdvuhqa","sqlExpression": null},"direction": "descending"}],"limit": 10000,"type": "default"},
   
   2)- com.fasterxml.jackson.databind.JsonMappingException :-- exception error throwing by druid.
   coming when limitSpec JSON specifies an array while you're trying to deserialize into an object.
   
   com.fasterxml.jackson.databind :-- is library , that support  General data-binding functionality for Jackson: works on core streaming API .  https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind
   
   

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