diff --git a/src/sql/engine/expr/ob_expr_output_pack.cpp b/src/sql/engine/expr/ob_expr_output_pack.cpp
index f6a4dc6bc3..952f472f36 100644
--- a/src/sql/engine/expr/ob_expr_output_pack.cpp
+++ b/src/sql/engine/expr/ob_expr_output_pack.cpp
@@ -17,6 +17,9 @@
 #include "io/easy_io.h"
 #include "lib/oblog/ob_log.h"
 #include "share/ob_lob_access_utils.h"
+#ifdef OB_BUILD_ORACLE_XML
+#include "sql/engine/expr/ob_expr_xml_func_helper.h"
+#endif
 namespace oceanbase{
 
 using namespace common;
@@ -561,39 +564,6 @@ int ObExprOutputPack::process_lob_locator_results(common::ObObj& value,
   return ret;
 }
 
-int ObExprOutputPack::process_sql_udt_results(common::ObObj& value,
-                                              common::ObIAllocator &alloc,
-                                              const ObSQLSessionInfo &my_session)
-{
-  int ret = OB_SUCCESS;
-  if (!value.is_xml_sql_type()) {
-    ret = OB_NOT_SUPPORTED;
-    OB_LOG(WARN, "not support udt type", K(ret), K(value.get_type()), K(value.get_udt_subschema_id()));
-  } else {
-    bool is_client_support_binary_xml = false; // client receive xml as json, like json
-    if (value.is_null() || value.is_nop_value()) {
-      // do nothing
-    } else if (is_client_support_binary_xml) {
-      // convert to udt client format
-    } else {
-      ObString data;
-      ObLobLocatorV2 loc(value.get_string(), true);
-      if (loc.is_null()) {
-      } else {
-        ObTextStringIter instr_iter(ObLongTextType, CS_TYPE_BINARY, value.get_string(), true);
-        if (OB_FAIL(instr_iter.init(0, &my_session, &alloc))) {
-          LOG_WARN("init lob str inter failed", K(ret), K(value));
-        } else if (OB_FAIL(instr_iter.get_full_data(data))) {
-          LOG_WARN("get xml full data failed", K(value));
-        } else {
-          value.set_udt_value(data.ptr(), data.length());
-        }
-      }
-    }
-  }
-  return ret;
-}
-
 int ObExprOutputPack::convert_string_charset(const common::ObString &in_str,
                                              const ObCollationType in_cs_type,
                                              const ObCollationType out_cs_type,
@@ -678,8 +648,10 @@ int ObExprOutputPack::try_encode_row(const ObExpr &expr, ObEvalCtx &ctx,
         } else if ((obj.is_lob() || obj.is_lob_locator() || obj.is_json())
                    && OB_FAIL(process_lob_locator_results(obj, alloc, *session))) {
           LOG_WARN("convert lob locator to longtext failed", K(ret));
-        } else if (obj.is_user_defined_sql_type() && OB_FAIL(process_sql_udt_results(obj, alloc, *session))) {
+#ifdef OB_BUILD_ORACLE_XML
+        } else if (obj.is_user_defined_sql_type() && OB_FAIL(ObXMLExprHelper::process_sql_udt_results(obj, &alloc, session))) {
           LOG_WARN("convert udt to client format failed", K(ret), K(obj.get_udt_subschema_id()));
+#endif
         }
       }
     }
diff --git a/src/sql/engine/expr/ob_expr_output_pack.h b/src/sql/engine/expr/ob_expr_output_pack.h
index 42a770df2d..4e106bbe97 100644
--- a/src/sql/engine/expr/ob_expr_output_pack.h
+++ b/src/sql/engine/expr/ob_expr_output_pack.h
@@ -74,9 +74,6 @@ private:
   static int process_lob_locator_results(common::ObObj& value,
                                          common::ObIAllocator &alloc,
                                          const ObSQLSessionInfo &my_session);
-  static int process_sql_udt_results(common::ObObj& value,
-                                     common::ObIAllocator &alloc,
-                                     const ObSQLSessionInfo &my_session);
 
   static int convert_string_charset(const common::ObString &in_str,
                                     const ObCollationType in_cs_type,