romseygeek commented on a change in pull request #1444:
URL: https://github.com/apache/lucene-solr/pull/1444#discussion_r413936078



##########
File path: 
lucene/expressions/src/java/org/apache/lucene/expressions/SimpleBindings.java
##########
@@ -96,24 +90,51 @@ public DoubleValuesSource getDoubleValuesSource(String 
name) {
       case SCORE:
         return DoubleValuesSource.SCORES;
       default:
-        throw new UnsupportedOperationException(); 
+        throw new UnsupportedOperationException();
     }
   }
   
-  /** 
-   * Traverses the graph of bindings, checking there are no cycles or missing 
references 
-   * @throws IllegalArgumentException if the bindings is inconsistent 
+  @Override
+  public DoubleValuesSource getDoubleValuesSource(String name) {
+    if (map.containsKey(name) == false) {

Review comment:
       I'm pretty sure this won't be in the hot path - it's part of query 
setup, not query execution - and I think it reads more clearly.




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