fixed compare, the test cases still assume the different type names i…

…n structs are allowed

src/function/comparison_functions.cpp

@@ -150,6 +150,16 @@ void Equals::operation(const struct_entry_t& left, const struct_entry_t& right,
         }
     }
     result = true;
+    // For STRUCT type, we also need to check their field names 
+    if (result || leftVector->dataType.getLogicalTypeID() == LogicalTypeID::STRUCT || rightVector->dataType.getLogicalTypeID() == LogicalTypeID::STRUCT) {
+        auto leftTypeNames = StructType::getFieldNames(leftVector->dataType);
+        auto rightTypeNames = StructType::getFieldNames(rightVector->dataType);
+        for (auto i = 0u; i < leftTypeNames.size(); i++) {
+            if (leftTypeNames[i] != rightTypeNames[i]) {
+                result = false;
+            }
+        }
+    }
 }
 
 static void executeNestedGreaterThan(uint8_t& isGreaterThan, uint8_t& isEqual,