abhishekagarwal87 commented on a change in pull request #11895:
URL: https://github.com/apache/druid/pull/11895#discussion_r745406035



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File path: 
processing/src/main/java/org/apache/druid/query/metadata/metadata/ColumnAnalysis.java
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@@ -47,6 +50,7 @@ public static ColumnAnalysis error(String reason)
 
   @JsonCreator
   public ColumnAnalysis(
+      @JsonProperty("typeSignature") ColumnType typeSignature,

Review comment:
       can this change cause a problem during upgrade? E.g. an historical is on 
older version while broker is on newer version so the broker gets old json from 
the historical when running segment metadata queries? 




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