eldenmoon commented on code in PR #47096:
URL: https://github.com/apache/doris/pull/47096#discussion_r1997845028


##########
fe/fe-core/src/main/java/org/apache/doris/catalog/ColumnType.java:
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@@ -208,12 +210,48 @@ public static void 
checkSupportSchemaChangeForComplexType(Type checkType, Type o
         if (checkType.isStructType() && other.isStructType()) {

Review Comment:
   maybe also check `not nullable` -> `nullable` and `nullable` -> `not 
nullable`,  if already checked in some where else ,then add such test cases



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