gianm commented on a change in pull request #9235: Add join-related DataSource 
types, and analysis functionality.
URL: https://github.com/apache/druid/pull/9235#discussion_r369701195
 
 

 ##########
 File path: processing/src/main/java/org/apache/druid/query/BaseQuery.java
 ##########
 @@ -270,14 +270,13 @@ public boolean equals(Object o)
            Objects.equals(dataSource, baseQuery.dataSource) &&
            Objects.equals(context, baseQuery.context) &&
            Objects.equals(querySegmentSpec, baseQuery.querySegmentSpec) &&
-           Objects.equals(duration, baseQuery.duration) &&
+           Objects.equals(getDuration(), baseQuery.getDuration()) &&
            Objects.equals(granularity, baseQuery.granularity);
   }
 
   @Override
   public int hashCode()
   {
-
-    return Objects.hash(dataSource, descending, context, querySegmentSpec, 
duration, granularity);
 
 Review comment:
   It's because `duration` is lazily computed, so it might be null. Calling 
`getDuration()` forces it to be computed. I'll add a comment.
   
   Btw, a lot of the subclasses of BaseQuery _do_ call `super.equals` at some 
point (but they do other stuff too).

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