siddharthteotia commented on a change in pull request #4535: Implement DISTINCT 
clause
URL: https://github.com/apache/incubator-pinot/pull/4535#discussion_r315382449
 
 

 ##########
 File path: 
pinot-core/src/main/java/org/apache/pinot/core/plan/TransformPlanNode.java
 ##########
 @@ -124,6 +143,10 @@ public TransformOperator run() {
     return new TransformOperator(_projectionPlanNode.run(), new 
ArrayList<>(_expressionTrees));
   }
 
+  public List<FieldSpec.DataType> getProjectedColumnTypes() {
 
 Review comment:
   I see, but as mentioned in the response above 
https://github.com/apache/incubator-pinot/pull/4535#discussion_r315381929, this 
projected column type info is being used later to build DataTable in 
InstanceResponseBlock

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