eldenmoon commented on code in PR #65561:
URL: https://github.com/apache/doris/pull/65561#discussion_r3656265490


##########
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/expression/check/CheckCast.java:
##########
@@ -356,9 +356,17 @@ public static boolean check(DataType originalType, 
DataType targetType, boolean
     public static boolean check(DataType originalType, DataType targetType,
             boolean isStrictMode, boolean looseAggState) {
         if (originalType.isVariantType() && targetType.isVariantType()) {
-            // Variant properties describe the source column layout. The 
execution value type is
-            // still Variant, so operators may align those properties without 
changing the value.
-            return true;
+            VariantType originalVariantType = (VariantType) originalType;
+            VariantType targetVariantType = (VariantType) targetType;
+            return 
originalVariantType.isExecutionCompatibleWith(targetVariantType);
+        }
+        if (originalType.isVariantType() && targetType.isComplexType()) {

Review Comment:
   这个代码是否能删掉



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