clintropolis commented on a change in pull request #9731:
URL: https://github.com/apache/druid/pull/9731#discussion_r435566970



##########
File path: 
processing/src/main/java/org/apache/druid/segment/DimensionHandlerUtils.java
##########
@@ -60,7 +60,8 @@
                                   .setDictionaryEncoded(false)
                                   .setDictionaryValuesUnique(false)
                                   .setDictionaryValuesSorted(false)
-                                  .setHasBitmapIndexes(false);
+                                  .setHasBitmapIndexes(false)
+                                  .setHasMultipleValues(false);

Review comment:
       Since null capabilities for vector selectors means unambiguously that 
the column doesn't exist, I changed this back to leaving multi-value as unknown 
in favor of checking for this condition in `makeVectorProcessor`, which I think 
is the best thing to do for now




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