tomglk commented on a change in pull request #151:
URL: https://github.com/apache/solr/pull/151#discussion_r655928003



##########
File path: 
solr/core/src/java/org/apache/solr/handler/component/QueryComponent.java
##########
@@ -185,6 +187,8 @@ public void prepare(ResponseBuilder rb) throws IOException
         if(rq instanceof RankQuery) {
           RankQuery rankQuery = (RankQuery)rq;
           rb.setRankQuery(rankQuery);
+          // we always need the score for reRanking
+          rb.setFieldFlags(rb.getFieldFlags() | GET_SCORES);

Review comment:
       That looks good to me! :)
   
   One thing that I stumbled upon while looking at your change is, that we 
actually override the flags instead of just adding the score, because we start 
with this:
   ```java
   int flags = 0;
   ```
   A comment why we do this instead of starting with 
   ```java
   int flags = rb.getFieldFlags();
   ```
   would be great, I think.
   




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