eldenmoon commented on code in PR #40573:
URL: https://github.com/apache/doris/pull/40573#discussion_r1778445365


##########
fe/fe-core/src/main/java/org/apache/doris/alter/SchemaChangeHandler.java:
##########
@@ -611,8 +611,9 @@ private boolean processModifyColumn(ModifyColumnClause 
alterClause, OlapTable ol
                 if (!col.equals(modColumn)) {
                     typeChanged = true;
                     // TODO:the case where columnPos is not empty has not been 
considered
-                    if (columnPos == null && col.getDataType() == 
PrimitiveType.VARCHAR
-                            && modColumn.getDataType() == 
PrimitiveType.VARCHAR) {
+                    if (columnPos == null && (col.getDataType() == 
PrimitiveType.VARCHAR
+                            && modColumn.getDataType() == 
PrimitiveType.VARCHAR)
+                            || (col.getDataType().isVariantType() && 
modColumn.getDataType().isVariantType())) {

Review Comment:
   VariantType and VariantType



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