diff --git a/src/share/ob_lob_access_utils.h b/src/share/ob_lob_access_utils.h
index f1918b47a5ec6414d22c364f9469a1586d2c0786..a132758ae8e239e9ee672270222452ee358ee1fd 100644
--- a/src/share/ob_lob_access_utils.h
+++ b/src/share/ob_lob_access_utils.h
@@ -116,7 +116,7 @@ public:
                    bool has_lob_header) :
     type_(type), cs_type_(cs_type), is_init_(false), is_lob_(false), is_outrow_(false),
     has_lob_header_(has_lob_header), state_(TEXTSTRING_ITER_INVALID), datum_str_(datum_str),
-    err_ret_(OB_SUCCESS)
+    ctx_(nullptr), err_ret_(OB_SUCCESS)
   {
     if (is_lob_storage(type)) {
       validate_has_lob_header(has_lob_header_);
@@ -126,7 +126,7 @@ public:
   ObTextStringIter(const ObObj &obj) :
     type_(obj.get_type()), cs_type_(obj.get_collation_type()), is_init_(false), is_lob_(false),
     is_outrow_(false), has_lob_header_(obj.has_lob_header()), state_(TEXTSTRING_ITER_INVALID),
-    datum_str_(obj.get_string()), err_ret_(OB_SUCCESS)
+    datum_str_(obj.get_string()), ctx_(nullptr), err_ret_(OB_SUCCESS)
   {
     if (is_lob_storage(obj.get_type())) {
       validate_has_lob_header(has_lob_header_);
diff --git a/src/storage/lob/ob_i_lob_adaptor.h b/src/storage/lob/ob_i_lob_adaptor.h
index dc21ccbc39dbc1343921ec5b306269d5d260ca01..76e3b75aa1a573abf30fabd05474c7352e7abaab 100644
--- a/src/storage/lob/ob_i_lob_adaptor.h
+++ b/src/storage/lob/ob_i_lob_adaptor.h
@@ -28,6 +28,9 @@ typedef struct ObLobPieceInfo ObLobPieceInfo;
 // TODO interface define
 class ObILobApator {
 public:
+  virtual int write_lob_meta(ObLobAccessParam &param, ObLobMetaInfo& row_info) = 0;
+  virtual int update_lob_meta(ObLobAccessParam& param, ObLobMetaInfo& old_row, ObLobMetaInfo& new_row) = 0;
+  virtual int erase_lob_meta(ObLobAccessParam &param, ObLobMetaInfo& row_info) = 0;
   virtual int scan_lob_meta(const ObLobAccessParam &param, ObTableScanParam &scan_param, common::ObNewRowIterator *&meta_iter_) = 0;
   virtual int get_lob_data(ObLobAccessParam &param, uint64_t piece_id, ObLobPieceInfo& info) = 0;
   virtual int revert_scan_iter(common::ObNewRowIterator *iter) = 0;
diff --git a/src/storage/lob/ob_lob_meta.cpp b/src/storage/lob/ob_lob_meta.cpp
index 11a30fe74d24388679a0fd89641772a9fc210793..9fe59c8312c2525e7ffba8a3af22b654b831b058 100644
--- a/src/storage/lob/ob_lob_meta.cpp
+++ b/src/storage/lob/ob_lob_meta.cpp
@@ -673,7 +673,7 @@ int ObLobMetaWriteIter::close()
 int ObLobMetaManager::write(ObLobAccessParam& param, ObLobMetaInfo& in_row)
 {
   int ret = OB_SUCCESS;
-  if (OB_FAIL(persistent_lob_adapter_.write_lob_meta_tablet(param, in_row))) {
+  if (OB_FAIL(persistent_lob_adapter_.write_lob_meta(param, in_row))) {
     LOG_WARN("write lob meta failed.", K(ret), K(param));
   }
   return ret;
@@ -721,7 +721,7 @@ int ObLobMetaManager::scan(ObLobAccessParam& param, ObLobMetaScanIter &iter)
 int ObLobMetaManager::erase(ObLobAccessParam& param, ObLobMetaInfo& in_row)
 {
   int ret = OB_SUCCESS;
-  if (OB_FAIL(persistent_lob_adapter_.erase_lob_meta_tablet(param, in_row))) {
+  if (OB_FAIL(persistent_lob_adapter_.erase_lob_meta(param, in_row))) {
     LOG_WARN("erase lob meta failed.", K(ret), K(param));
   }
   return ret;
@@ -731,7 +731,7 @@ int ObLobMetaManager::erase(ObLobAccessParam& param, ObLobMetaInfo& in_row)
 int ObLobMetaManager::update(ObLobAccessParam& param, ObLobMetaInfo& old_row, ObLobMetaInfo& new_row)
 {
   int ret = OB_SUCCESS;
-  if (OB_FAIL(persistent_lob_adapter_.update_lob_meta_tablet(param, old_row, new_row))) {
+  if (OB_FAIL(persistent_lob_adapter_.update_lob_meta(param, old_row, new_row))) {
     LOG_WARN("update lob meta failed.");
   }
   return ret;
diff --git a/src/storage/lob/ob_lob_persistent_adaptor.cpp b/src/storage/lob/ob_lob_persistent_adaptor.cpp
index a2661c222461e0153b5559493b2640f9fcd4b4a9..f6957712519e409b816ab710f31ee56cfdde6d85 100644
--- a/src/storage/lob/ob_lob_persistent_adaptor.cpp
+++ b/src/storage/lob/ob_lob_persistent_adaptor.cpp
@@ -362,7 +362,7 @@ int ObPersistentLobApator::build_lob_meta_table_dml(
   return ret;
 }
 
-int ObPersistentLobApator::erase_lob_meta_tablet(ObLobAccessParam &param, ObLobMetaInfo& in_row)
+int ObPersistentLobApator::erase_lob_meta(ObLobAccessParam &param, ObLobMetaInfo& in_row)
 {
   int ret = OB_SUCCESS;
 
@@ -477,7 +477,7 @@ int ObPersistentLobApator::erase_lob_piece_tablet(ObLobAccessParam& param, ObLob
   return ret;
 }
 
-int ObPersistentLobApator::write_lob_meta_tablet(ObLobAccessParam& param, ObLobMetaInfo& in_row)
+int ObPersistentLobApator::write_lob_meta(ObLobAccessParam& param, ObLobMetaInfo& in_row)
 {
   int ret = OB_SUCCESS;
 
@@ -528,7 +528,7 @@ int ObPersistentLobApator::write_lob_meta_tablet(ObLobAccessParam& param, ObLobM
   return ret;
 }
 
-int ObPersistentLobApator::update_lob_meta_tablet(ObLobAccessParam& param, ObLobMetaInfo& old_row, ObLobMetaInfo& new_row)
+int ObPersistentLobApator::update_lob_meta(ObLobAccessParam& param, ObLobMetaInfo& old_row, ObLobMetaInfo& new_row)
 {
   int ret = OB_SUCCESS;
 
diff --git a/src/storage/lob/ob_lob_persistent_adaptor.h b/src/storage/lob/ob_lob_persistent_adaptor.h
index fd47b92f24009b209e2b79fb716ef50b83abf18c..af06b2d94493ac4bf9097ed83fce5c499d205ff1 100644
--- a/src/storage/lob/ob_lob_persistent_adaptor.h
+++ b/src/storage/lob/ob_lob_persistent_adaptor.h
@@ -56,17 +56,17 @@ public:
   virtual int revert_scan_iter(common::ObNewRowIterator *iter) override;
   virtual int fetch_lob_id(const ObLobAccessParam& param, uint64_t &lob_id) override;
   // write meta tablet
-  int write_lob_meta_tablet(ObLobAccessParam &param, ObLobMetaInfo& row_info);
+  virtual int write_lob_meta(ObLobAccessParam &param, ObLobMetaInfo& row_info) override;
   // write piece tablet
   int write_lob_piece_tablet(ObLobAccessParam& param, ObLobPieceInfo& in_row);
   // erase meta tablet item
-  int erase_lob_meta_tablet(ObLobAccessParam &param, ObLobMetaInfo& row_info);
+  virtual int erase_lob_meta(ObLobAccessParam &param, ObLobMetaInfo& row_info) override;
   // erase piece tablet item
   int erase_lob_piece_tablet(ObLobAccessParam& param, ObLobPieceInfo& in_row);
   // update piece tabliet item
   int update_lob_piece_tablet(ObLobAccessParam& param, ObLobPieceInfo& in_row);
   // update lob meta tablet item
-  int update_lob_meta_tablet(ObLobAccessParam& param, ObLobMetaInfo& old_row, ObLobMetaInfo& new_row);
+  virtual int update_lob_meta(ObLobAccessParam& param, ObLobMetaInfo& old_row, ObLobMetaInfo& new_row) override;
 private:
   // get schema from schema service 
   int get_lob_tablet_schema(