missed one change

src/Formats/NativeWriter.cpp

@@ -117,18 +117,21 @@ void NativeWriter::write(const Block & block)
         /// Serialization. Dynamic, if client supports it.
         SerializationPtr serialization;
         /// proton: starts
-        /// if (client_revision >= DBMS_MIN_REVISION_WITH_CUSTOM_SERIALIZATION)
-        /// {
-        ///     auto info = column.type->getSerializationInfo(*column.column);
-        ///     serialization = column.type->getSerialization(*info);
-        ///
-        ///     bool has_custom = info->hasCustomSerialization();
-        ///     writeBinary(static_cast<UInt8>(has_custom), ostr);
-        ///     if (has_custom)
-        ///         info->serialializeKindBinary(ostr);
-        /// }
-        /// else
-        /// proton: ends
+        /// Because our drivers does not support custom serialization, we can only check the serialization when `compatible_with_clickhouse` is `true`,
+        /// i.e. this writer is writing packets to clickhouse (for ClickHouse external tables).
+        if (compatible_with_clickhouse &&
+            /// proton: ends
+            client_revision >= DBMS_MIN_REVISION_WITH_CUSTOM_SERIALIZATION)
+        {
+            auto info = column.type->getSerializationInfo(*column.column);
+            serialization = column.type->getSerialization(*info);
+
+            bool has_custom = info->hasCustomSerialization();
+            writeBinary(static_cast<UInt8>(has_custom), ostr);
+            if (has_custom)
+                info->serialializeKindBinary(ostr);
+        }
+        else
         {
             serialization = column.type->getDefaultSerialization();
             column.column = recursiveRemoveSparse(column.column);