diff --git a/src/objit/include/objit/common/ob_item_type.h b/src/objit/include/objit/common/ob_item_type.h
index 5168e960c8..497d61fa85 100755
--- a/src/objit/include/objit/common/ob_item_type.h
+++ b/src/objit/include/objit/common/ob_item_type.h
@@ -2409,6 +2409,8 @@ typedef enum ObItemType
   T_COALESCE_AGGR,
   T_NO_COALESCE_AGGR,
   T_AUTO_INCREMENT_CACHE_SIZE,
+
+  T_IGNORE_UNKNOWN_USER,
   T_MAX //Attention: add a new type before T_MAX
 } ObItemType;
 
diff --git a/src/share/ob_rpc_struct.cpp b/src/share/ob_rpc_struct.cpp
index 9395b1abf7..ee533c9c74 100755
--- a/src/share/ob_rpc_struct.cpp
+++ b/src/share/ob_rpc_struct.cpp
@@ -4678,6 +4678,8 @@ int ObAlterUserProfileArg::assign(const ObAlterUserProfileArg &other)
     LOG_WARN("fail to assign ddl arg", KR(ret));
   } else if (OB_FAIL(role_id_array_.assign(other.role_id_array_))) {
     SHARE_LOG(WARN, "fail to assign role_id_array", K(ret));
+  } else if (OB_FAIL(user_ids_.assign(other.user_ids_))) {
+    SHARE_LOG(WARN, "fail to assign user_ids", K(ret));
   }
   return ret;
 }
@@ -4697,7 +4699,8 @@ OB_SERIALIZE_MEMBER((ObAlterUserProfileArg, ObDDLArg),
                     profile_name_,
                     user_id_,
                     default_role_flag_,
-                    role_id_array_);
+                    role_id_array_,
+                    user_ids_);
 
 bool ObGrantArg::is_valid() const
 {
@@ -4751,6 +4754,8 @@ int ObGrantArg::assign(const ObGrantArg &other)
     SHARE_LOG(WARN, "fail to assign ref_col_ids_", K(ret));
   } else if (OB_FAIL(sel_col_ids_.assign(other.sel_col_ids_))) {
     SHARE_LOG(WARN, "fail to assign sel_col_ids_", K(ret));
+  } else if (OB_FAIL(column_names_priv_.assign(other.column_names_priv_))) {
+    LOG_WARN("fail to assin column_names_priv_", K(ret));
   }
   return ret;
 }
@@ -4781,7 +4786,8 @@ OB_DEF_SERIALIZE(ObGrantArg)
               grantor_id_,
               remain_roles_,
               is_inner_,
-              sel_col_ids_
+              sel_col_ids_,
+              column_names_priv_
               );
 return ret;
 }
@@ -4812,7 +4818,8 @@ OB_DEF_DESERIALIZE(ObGrantArg)
               grantor_id_,
               remain_roles_,
               is_inner_,
-              sel_col_ids_);
+              sel_col_ids_,
+              column_names_priv_);
 
   //compatibility for old version
   if (OB_SUCC(ret) && users_passwd_.count() > 0 && hosts_.empty()) {
@@ -4852,7 +4859,8 @@ OB_DEF_SERIALIZE_SIZE(ObGrantArg)
               grantor_id_,
               remain_roles_,
               is_inner_,
-              sel_col_ids_);
+              sel_col_ids_,
+              column_names_priv_);
   return len;
 }
 
@@ -4907,6 +4915,8 @@ int ObRevokeTableArg::assign(const ObRevokeTableArg &other)
     LOG_WARN("fail to assign ref_col_ids_", K(ret));
   } else if (OB_FAIL(sel_col_ids_.assign(other.sel_col_ids_))) {
     LOG_WARN("fail to assign sel_col_ids_", K(ret));
+  } else if (OB_FAIL(column_names_priv_.assign(other.column_names_priv_))) {
+    LOG_WARN("fail to assin column_names_priv_", K(ret));
   }
   return ret;
 }
@@ -4932,7 +4942,8 @@ OB_SERIALIZE_MEMBER((ObRevokeTableArg, ObDDLArg),
                     sel_col_ids_,
                     ins_col_ids_,
                     upd_col_ids_,
-                    ref_col_ids_);
+                    ref_col_ids_,
+                    column_names_priv_);
 
 bool ObRevokeSysPrivArg::is_valid() const
 {
diff --git a/src/share/ob_rpc_struct.h b/src/share/ob_rpc_struct.h
index a820e5f04e..b34b33b141 100755
--- a/src/share/ob_rpc_struct.h
+++ b/src/share/ob_rpc_struct.h
@@ -115,6 +115,7 @@ enum ObDefaultRoleFlag
   OB_DEFAULT_ROLE_ALL = 2,
   OB_DEFAULT_ROLE_ALL_EXCEPT = 3,
   OB_DEFAULT_ROLE_NONE = 4,
+  OB_DEFAULT_ROLE_DEFAULT = 5,
   OB_DEFAULT_ROLE_MAX,
 };
 struct Bool
@@ -5242,7 +5243,7 @@ struct ObAlterUserProfileArg : public ObDDLArg
 public:
   ObAlterUserProfileArg() : ObDDLArg(), tenant_id_(common::OB_INVALID_TENANT_ID),
     user_name_(), host_name_(), profile_name_(), user_id_(common::OB_INVALID_TENANT_ID),
-    default_role_flag_(common::OB_INVALID_TENANT_ID), role_id_array_()
+    default_role_flag_(common::OB_INVALID_TENANT_ID), role_id_array_(), user_ids_()
   { }
   virtual ~ObAlterUserProfileArg() {}
   int assign(const ObAlterUserProfileArg &other);
@@ -5256,6 +5257,7 @@ public:
   uint64_t user_id_;
   uint64_t default_role_flag_;
   common::ObSEArray<uint64_t, 4> role_id_array_;
+  common::ObSEArray<uint64_t, 4> user_ids_; //for set default role to multiple users
 };
 
 struct ObCreateDirectoryArg : public ObDDLArg
@@ -5325,7 +5327,7 @@ public:
                  object_id_(common::OB_INVALID_ID), ins_col_ids_(),
                  upd_col_ids_(), ref_col_ids_(),
                  grantor_id_(common::OB_INVALID_ID), remain_roles_(), is_inner_(false),
-		 sel_col_ids_()
+		         sel_col_ids_(), column_names_priv_()
   { }
   virtual ~ObGrantArg() {}
   bool is_valid() const;
@@ -5362,6 +5364,7 @@ public:
   common::ObSArray<common::ObString> remain_roles_;
   bool is_inner_;
   common::ObSEArray<uint64_t, 4> sel_col_ids_;
+  common::ObSEArray<std::pair<ObString, ObPrivType>, 4> column_names_priv_;
 };
 
 struct ObStandbyGrantArg : public ObDDLArg
@@ -5435,7 +5438,7 @@ public:
                             priv_set_(0), grant_(true), obj_id_(common::OB_INVALID_ID),
                             obj_type_(common::OB_INVALID_ID), grantor_id_(common::OB_INVALID_ID),
                             obj_priv_array_(), revoke_all_ora_(false), sel_col_ids_(), ins_col_ids_(),
-			    upd_col_ids_(), ref_col_ids_()
+			    upd_col_ids_(), ref_col_ids_(), column_names_priv_()
   { }
   bool is_valid() const;
 
@@ -5466,6 +5469,7 @@ public:
   common::ObSEArray<uint64_t, 4> ins_col_ids_;
   common::ObSEArray<uint64_t, 4> upd_col_ids_;
   common::ObSEArray<uint64_t, 4> ref_col_ids_;
+  common::ObSEArray<std::pair<ObString, ObPrivType>, 4> column_names_priv_;
 };
 
 struct ObRevokeSysPrivArg : public ObDDLArg