diff --git a/src/rootserver/ddl_task/ob_build_mview_task.cpp b/src/rootserver/ddl_task/ob_build_mview_task.cpp
index 49838c141a..ee6efa60ce 100644
--- a/src/rootserver/ddl_task/ob_build_mview_task.cpp
+++ b/src/rootserver/ddl_task/ob_build_mview_task.cpp
@@ -300,17 +300,6 @@ int ObBuildMViewTask::cleanup_impl()
   return ret;
 }
 
-void ObBuildMViewTask::flt_set_task_span_tag() const
-{
-  LOG_INFO("flt_set_task_span_tag begin");
-}
-
-void ObBuildMViewTask::flt_set_status_span_tag() const
-{
-  LOG_INFO("flt_set_status_span_tag begin");
-}
-
-
 int ObBuildMViewTask::mview_complete_refresh(obrpc::ObMViewCompleteRefreshRes &res)
 {
   int ret = OB_SUCCESS;
diff --git a/src/rootserver/ddl_task/ob_build_mview_task.h b/src/rootserver/ddl_task/ob_build_mview_task.h
index 6a50fac813..6fb766d581 100644
--- a/src/rootserver/ddl_task/ob_build_mview_task.h
+++ b/src/rootserver/ddl_task/ob_build_mview_task.h
@@ -37,8 +37,6 @@ public:
            const int64_t snapshot_version = 0);
   virtual int process() override;
   virtual int cleanup_impl() override;
-  virtual void flt_set_task_span_tag() const override;
-  virtual void flt_set_status_span_tag() const override;
   virtual int serialize_params_to_message(char *buf,
                                           const int64_t buf_size,
                                           int64_t &pos) const override;
diff --git a/src/rootserver/ddl_task/ob_column_redefinition_task.cpp b/src/rootserver/ddl_task/ob_column_redefinition_task.cpp
index 04f5eda5a2..56d597eb46 100644
--- a/src/rootserver/ddl_task/ob_column_redefinition_task.cpp
+++ b/src/rootserver/ddl_task/ob_column_redefinition_task.cpp
@@ -798,51 +798,3 @@ int ObColumnRedefinitionTask::collect_longops_stat(ObLongopsValue &value)
 
   return ret;
 }
-
-void ObColumnRedefinitionTask::flt_set_task_span_tag() const
-{
-  FLT_SET_TAG(ddl_task_id, task_id_, ddl_parent_task_id, parent_task_id_,
-              ddl_data_table_id, object_id_, ddl_schema_version, schema_version_,
-              ddl_snapshot_version, snapshot_version_, ddl_ret_code, ret_code_);
-}
-
-void ObColumnRedefinitionTask::flt_set_status_span_tag() const
-{
-  switch (task_status_) {
-  case ObDDLTaskStatus::PREPARE: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::WAIT_TRANS_END: {
-    FLT_SET_TAG(ddl_data_table_id, object_id_, ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::OBTAIN_SNAPSHOT: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::REDEFINITION: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::COPY_TABLE_DEPENDENT_OBJECTS: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::TAKE_EFFECT: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::FAIL: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::SUCCESS: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  default: {
-    break;
-  }
-  }
-}
\ No newline at end of file
diff --git a/src/rootserver/ddl_task/ob_column_redefinition_task.h b/src/rootserver/ddl_task/ob_column_redefinition_task.h
index d065e7788b..13f7abc2ee 100644
--- a/src/rootserver/ddl_task/ob_column_redefinition_task.h
+++ b/src/rootserver/ddl_task/ob_column_redefinition_task.h
@@ -52,8 +52,6 @@ public:
     const ObDDLTaskInfo &addition_info) override;
   virtual int collect_longops_stat(share::ObLongopsValue &value) override;
   virtual bool support_longops_monitoring() const { return true; }
-  virtual void flt_set_task_span_tag() const override;
-  virtual void flt_set_status_span_tag() const override;
   virtual int serialize_params_to_message(char *buf, const int64_t buf_len, int64_t &pos) const override;
   virtual int deserialize_params_from_message(const uint64_t tenant_id, const char *buf, const int64_t data_len, int64_t &pos) override;
   virtual int64_t get_serialize_param_size() const override;
diff --git a/src/rootserver/ddl_task/ob_constraint_task.cpp b/src/rootserver/ddl_task/ob_constraint_task.cpp
index ac5135337c..3651492224 100755
--- a/src/rootserver/ddl_task/ob_constraint_task.cpp
+++ b/src/rootserver/ddl_task/ob_constraint_task.cpp
@@ -2054,39 +2054,3 @@ int64_t ObConstraintTask::get_serialize_param_size() const
 {
   return alter_table_arg_.get_serialize_size() + ObDDLTask::get_serialize_param_size();
 }
-void ObConstraintTask::flt_set_task_span_tag() const
-{
-  FLT_SET_TAG(ddl_task_id, task_id_, ddl_parent_task_id, parent_task_id_,
-              ddl_data_table_id, object_id_, ddl_schema_version, schema_version_,
-              ddl_snapshot_version, snapshot_version_);
-}
-
-void ObConstraintTask::flt_set_status_span_tag() const
-{
-  switch (task_status_) {
-  case ObDDLTaskStatus::WAIT_TRANS_END: {
-    FLT_SET_TAG(ddl_data_table_id, object_id_, ddl_schema_version, schema_version_,
-                ddl_snapshot_version, snapshot_version_, ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::CHECK_CONSTRAINT_VALID: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::SET_CONSTRAINT_VALIDATE: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::FAIL: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::SUCCESS: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  default: {
-    break;
-  }
-  }
-}
diff --git a/src/rootserver/ddl_task/ob_constraint_task.h b/src/rootserver/ddl_task/ob_constraint_task.h
index 75b69572e7..5d431b4e91 100644
--- a/src/rootserver/ddl_task/ob_constraint_task.h
+++ b/src/rootserver/ddl_task/ob_constraint_task.h
@@ -108,8 +108,6 @@ public:
   virtual int serialize_params_to_message(char *buf, const int64_t buf_size, int64_t &pos) const override;
   virtual int deserialize_params_from_message(const uint64_t tenant_id, const char *buf, const int64_t buf_size, int64_t &pos) override;
   virtual int64_t get_serialize_param_size() const override;
-  virtual void flt_set_task_span_tag() const override;
-  virtual void flt_set_status_span_tag() const override;
   virtual int cleanup_impl() override;
 private:
   int hold_snapshot(const int64_t snapshot_version);
diff --git a/src/rootserver/ddl_task/ob_ddl_redefinition_task.h b/src/rootserver/ddl_task/ob_ddl_redefinition_task.h
index 2be058bab8..ed98b672cd 100644
--- a/src/rootserver/ddl_task/ob_ddl_redefinition_task.h
+++ b/src/rootserver/ddl_task/ob_ddl_redefinition_task.h
@@ -148,8 +148,6 @@ public:
       const uint64_t child_task_key,
       const int ret_code) override;
   int notify_update_autoinc_finish(const uint64_t autoinc_val, const int ret_code);
-  virtual void flt_set_task_span_tag() const = 0;
-  virtual void flt_set_status_span_tag() const = 0;
   virtual int cleanup_impl() override;
   int reap_old_replica_build_task(bool &need_exec_new_inner_sql);
   INHERIT_TO_STRING_KV("ObDDLTask", ObDDLTask,
diff --git a/src/rootserver/ddl_task/ob_ddl_retry_task.cpp b/src/rootserver/ddl_task/ob_ddl_retry_task.cpp
index 07587e5451..b4212f7fb6 100644
--- a/src/rootserver/ddl_task/ob_ddl_retry_task.cpp
+++ b/src/rootserver/ddl_task/ob_ddl_retry_task.cpp
@@ -734,33 +734,3 @@ int ObDDLRetryTask::update_task_status_wait_child_task_finish(
   }
   return ret;
 }
-
-void ObDDLRetryTask::flt_set_task_span_tag() const
-{
-  FLT_SET_TAG(ddl_task_id, task_id_, ddl_parent_task_id, parent_task_id_, ddl_data_table_id, object_id_);
-}
-
-void ObDDLRetryTask::flt_set_status_span_tag() const
-{
-  switch (task_status_) {
-  case ObDDLTaskStatus::PREPARE: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::DROP_SCHEMA: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::FAIL: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::SUCCESS: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  default: {
-    break;
-  }
-  }
-}
diff --git a/src/rootserver/ddl_task/ob_ddl_retry_task.h b/src/rootserver/ddl_task/ob_ddl_retry_task.h
index 13b8fd6439..922746c4a2 100644
--- a/src/rootserver/ddl_task/ob_ddl_retry_task.h
+++ b/src/rootserver/ddl_task/ob_ddl_retry_task.h
@@ -47,8 +47,6 @@ public:
         common::ObMySQLTransaction &trans,
         const uint64_t tenant_id,
         const int64_t task_id);
-  virtual void flt_set_task_span_tag() const override;
-  virtual void flt_set_status_span_tag() const override;
   virtual int cleanup_impl() override;
 private:
   int check_health();
diff --git a/src/rootserver/ddl_task/ob_ddl_task.cpp b/src/rootserver/ddl_task/ob_ddl_task.cpp
index fc2a4943bf..d35853ef69 100644
--- a/src/rootserver/ddl_task/ob_ddl_task.cpp
+++ b/src/rootserver/ddl_task/ob_ddl_task.cpp
@@ -348,7 +348,7 @@ void ObDDLTracing::end_task_span()
     int ret = OB_SUCCESS;
     FLT_RESTORE_DDL_TRACE_CTX(trace_ctx_);
     FLT_SET_AUTO_FLUSH(true);
-    task_->flt_set_task_span_tag();
+    // task_->flt_set_task_span_tag();
     // TODO hanxuan fix MTL_SWITCH
     MTL_SWITCH(OB_SYS_TENANT_ID) {
       FLT_END_SPAN(task_span_);
@@ -513,7 +513,7 @@ void ObDDLTracing::end_status_span()
     int ret = OB_SUCCESS;
     FLT_RESTORE_DDL_TRACE_CTX(trace_ctx_);
     FLT_SET_AUTO_FLUSH(true);
-    task_->flt_set_status_span_tag();
+    //task_->flt_set_status_span_tag();
     // TODO hanxuan fix MTL_SWITCH
     MTL_SWITCH(OB_SYS_TENANT_ID) {
       FLT_END_SPAN(status_span_);
diff --git a/src/rootserver/ddl_task/ob_ddl_task.h b/src/rootserver/ddl_task/ob_ddl_task.h
index 06d1fa7710..cc39af92e1 100755
--- a/src/rootserver/ddl_task/ob_ddl_task.h
+++ b/src/rootserver/ddl_task/ob_ddl_task.h
@@ -544,8 +544,11 @@ public:
       longops_stat_(nullptr), gmt_create_(0), stat_info_(), delay_schedule_time_(0), next_schedule_ts_(0),
       execution_id_(-1), start_time_(0), data_format_version_(0), is_pre_split_(false), wait_trans_ctx_()
   {}
+  ObDDLTask():
+    ObDDLTask(share::DDL_INVALID)
+  {}
   virtual ~ObDDLTask() {}
-  virtual int process() = 0;
+  virtual int process() { return OB_NOT_SUPPORTED; }
   virtual int on_child_task_finish(const uint64_t child_task_key, const int ret_code) { return common::OB_NOT_SUPPORTED; }
   virtual bool is_valid() const { return is_inited_; }
   typedef common::ObCurTraceId::TraceId TraceId;
@@ -627,9 +630,7 @@ public:
   static bool check_is_load_data(share::ObDDLType task_type);
   virtual bool support_longops_monitoring() const { return false; }
   int cleanup();
-  virtual int cleanup_impl() = 0;
-  virtual void flt_set_task_span_tag() const = 0;
-  virtual void flt_set_status_span_tag() const = 0;
+  virtual int cleanup_impl() { return OB_NOT_SUPPORTED; }
   int update_task_record_status_and_msg(common::ObISQLClient &proxy, const share::ObDDLTaskStatus real_new_status);
 
   #ifdef ERRSIM
diff --git a/src/rootserver/ddl_task/ob_drop_fts_index_task.cpp b/src/rootserver/ddl_task/ob_drop_fts_index_task.cpp
index e101decde6..cf33c287bd 100644
--- a/src/rootserver/ddl_task/ob_drop_fts_index_task.cpp
+++ b/src/rootserver/ddl_task/ob_drop_fts_index_task.cpp
@@ -235,16 +235,6 @@ int64_t ObDropFTSIndexTask::get_serialize_param_size() const
        + fts_doc_word_.get_serialize_size();
 }
 
-void ObDropFTSIndexTask::flt_set_task_span_tag() const
-{
-  // TODO: @hanxuan, add me for tracing.
-}
-
-void ObDropFTSIndexTask::flt_set_status_span_tag() const
-{
-  // TODO: @hanxuan, add me for tracing.
-}
-
 int ObDropFTSIndexTask::check_switch_succ()
 {
   int ret = OB_SUCCESS;
diff --git a/src/rootserver/ddl_task/ob_drop_fts_index_task.h b/src/rootserver/ddl_task/ob_drop_fts_index_task.h
index 883e72fa05..710fff73be 100644
--- a/src/rootserver/ddl_task/ob_drop_fts_index_task.h
+++ b/src/rootserver/ddl_task/ob_drop_fts_index_task.h
@@ -63,8 +63,6 @@ public:
       int64_t &pos) override;
   virtual int64_t get_serialize_param_size() const override;
 
-  virtual void flt_set_task_span_tag() const override;
-  virtual void flt_set_status_span_tag() const override;
   virtual int on_child_task_finish(const uint64_t child_task_key, const int ret_code) override { return OB_SUCCESS; }
 
   INHERIT_TO_STRING_KV("ObDDLTask", ObDDLTask, K_(rowkey_doc), K_(doc_rowkey), K_(domain_index), K_(fts_doc_word));
diff --git a/src/rootserver/ddl_task/ob_drop_index_task.cpp b/src/rootserver/ddl_task/ob_drop_index_task.cpp
index 3195dd8b2c..dc492d7260 100644
--- a/src/rootserver/ddl_task/ob_drop_index_task.cpp
+++ b/src/rootserver/ddl_task/ob_drop_index_task.cpp
@@ -481,51 +481,3 @@ int64_t ObDropIndexTask::get_serialize_param_size() const
 {
   return drop_index_arg_.get_serialize_size() + ObDDLTask::get_serialize_param_size();
 }
-
-void ObDropIndexTask::flt_set_task_span_tag() const
-{
-  FLT_SET_TAG(ddl_task_id, task_id_, ddl_parent_task_id, parent_task_id_,
-              ddl_data_table_id, object_id_, ddl_index_table_id, target_object_id_,
-              ddl_schema_version, schema_version_);
-}
-
-void ObDropIndexTask::flt_set_status_span_tag() const
-{
-  switch (task_status_) {
-  case ObDDLTaskStatus::PREPARE: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::SET_WRITE_ONLY: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::WAIT_TRANS_END_FOR_WRITE_ONLY: {
-    FLT_SET_TAG(ddl_data_table_id, object_id_, ddl_snapshot_version, snapshot_version_, ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::SET_UNUSABLE: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::WAIT_TRANS_END_FOR_UNUSABLE: {
-    FLT_SET_TAG(ddl_data_table_id, object_id_, ddl_snapshot_version, snapshot_version_, ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::DROP_SCHEMA: {
-    FLT_SET_TAG(ddl_index_table_id, target_object_id_, ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::FAIL: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::SUCCESS: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  default: {
-    break;
-  }
-  }
-}
diff --git a/src/rootserver/ddl_task/ob_drop_index_task.h b/src/rootserver/ddl_task/ob_drop_index_task.h
index fd3329ea29..4fa1da4b94 100644
--- a/src/rootserver/ddl_task/ob_drop_index_task.h
+++ b/src/rootserver/ddl_task/ob_drop_index_task.h
@@ -43,8 +43,6 @@ public:
   virtual int deserialize_params_from_message(const uint64_t tenant_id, const char *buf, const int64_t buf_size, int64_t &pos) override;
   virtual int64_t get_serialize_param_size() const override;
   INHERIT_TO_STRING_KV("ObDDLTask", ObDDLTask, KP_(root_service));
-  virtual void flt_set_task_span_tag() const override;
-  virtual void flt_set_status_span_tag() const override;
   virtual int cleanup_impl() override;
 private:
   int check_switch_succ();
diff --git a/src/rootserver/ddl_task/ob_drop_primary_key_task.cpp b/src/rootserver/ddl_task/ob_drop_primary_key_task.cpp
index 40fc6ad99c..5d9c4fc615 100644
--- a/src/rootserver/ddl_task/ob_drop_primary_key_task.cpp
+++ b/src/rootserver/ddl_task/ob_drop_primary_key_task.cpp
@@ -127,54 +127,3 @@ int ObDropPrimaryKeyTask::process()
   }
   return ret;
 }
-void ObDropPrimaryKeyTask::flt_set_task_span_tag() const
-{
-  FLT_SET_TAG(ddl_task_id, task_id_, ddl_parent_task_id, parent_task_id_,
-              ddl_data_table_id, object_id_, ddl_schema_version, schema_version_);
-}
-
-void ObDropPrimaryKeyTask::flt_set_status_span_tag() const
-{
-  switch (task_status_) {
-  case ObDDLTaskStatus::PREPARE: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::OBTAIN_SNAPSHOT: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::WAIT_TRANS_END: {
-    FLT_SET_TAG(ddl_data_table_id, object_id_, ddl_schema_version, schema_version_,
-                ddl_snapshot_version, snapshot_version_, ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::REDEFINITION: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::COPY_TABLE_DEPENDENT_OBJECTS: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::MODIFY_AUTOINC: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::TAKE_EFFECT: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::FAIL: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::SUCCESS: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  default: {
-    break;
-  }
-  }
-}
diff --git a/src/rootserver/ddl_task/ob_drop_primary_key_task.h b/src/rootserver/ddl_task/ob_drop_primary_key_task.h
index 8862fac7fa..f1e8f93fd2 100644
--- a/src/rootserver/ddl_task/ob_drop_primary_key_task.h
+++ b/src/rootserver/ddl_task/ob_drop_primary_key_task.h
@@ -40,8 +40,6 @@ public:
       const int64_t task_status = share::ObDDLTaskStatus::PREPARE,
       const int64_t snapshot_version = 0);
   virtual int process() override;
-  virtual void flt_set_task_span_tag() const override;
-  virtual void flt_set_status_span_tag() const override;
 private:
   static const int64_t OB_DROP_PRIMARY_KEY_TASK_VERSION = 1L;
 };
diff --git a/src/rootserver/ddl_task/ob_fts_index_build_task.cpp b/src/rootserver/ddl_task/ob_fts_index_build_task.cpp
index 88728fd217..56195498a4 100644
--- a/src/rootserver/ddl_task/ob_fts_index_build_task.cpp
+++ b/src/rootserver/ddl_task/ob_fts_index_build_task.cpp
@@ -1655,13 +1655,5 @@ int ObFtsIndexBuildTask::cleanup_impl()
   return ret;
 }
 
-void ObFtsIndexBuildTask::flt_set_task_span_tag() const
-{
-}
-
-void ObFtsIndexBuildTask::flt_set_status_span_tag() const
-{
-}
-
 } // end namespace rootserver
 } // end namespace oceanbase
diff --git a/src/rootserver/ddl_task/ob_fts_index_build_task.h b/src/rootserver/ddl_task/ob_fts_index_build_task.h
index 6a9c7949a9..254ecb0777 100644
--- a/src/rootserver/ddl_task/ob_fts_index_build_task.h
+++ b/src/rootserver/ddl_task/ob_fts_index_build_task.h
@@ -39,8 +39,6 @@ public:
       const int64_t snapshot_version = 0);
   int init(const ObDDLTaskRecord &task_record);
   virtual int process() override;
-  virtual void flt_set_task_span_tag() const override;
-  virtual void flt_set_status_span_tag() const override;
   virtual int cleanup_impl() override;
   virtual bool is_valid() const override;
   virtual int collect_longops_stat(share::ObLongopsValue &value) override;
diff --git a/src/rootserver/ddl_task/ob_index_build_task.cpp b/src/rootserver/ddl_task/ob_index_build_task.cpp
index b0ee65b10e..f96504cc69 100755
--- a/src/rootserver/ddl_task/ob_index_build_task.cpp
+++ b/src/rootserver/ddl_task/ob_index_build_task.cpp
@@ -346,52 +346,6 @@ int ObIndexBuildTask::process()
   return ret;
 }
 
-void ObIndexBuildTask::flt_set_task_span_tag() const
-{
-  FLT_SET_TAG(ddl_task_id, task_id_, ddl_parent_task_id, parent_task_id_,
-              ddl_data_table_id, object_id_, ddl_index_table_id, index_table_id_,
-              ddl_is_unique_index, is_unique_index_, ddl_is_global_index, is_global_index_,
-              ddl_schema_version, schema_version_);
-}
-
-void ObIndexBuildTask::flt_set_status_span_tag() const
-{
-  switch (task_status_) {
-  case ObDDLTaskStatus::PREPARE: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::WAIT_TRANS_END: {
-    FLT_SET_TAG(ddl_data_table_id, object_id_, ddl_index_table_id, index_table_id_, ddl_schema_version, schema_version_,
-                ddl_snapshot_version, snapshot_version_, ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::REDEFINITION: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::VALIDATE_CHECKSUM: {
-    FLT_SET_TAG(ddl_check_unique_snapshot, check_unique_snapshot_, ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::TAKE_EFFECT: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::FAIL: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::SUCCESS: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  default: {
-    break;
-  }
-  }
-}
-
 int ObIndexBuildTask::init(
     const uint64_t tenant_id,
     const int64_t task_id,
diff --git a/src/rootserver/ddl_task/ob_index_build_task.h b/src/rootserver/ddl_task/ob_index_build_task.h
index 3dbd3f097b..f54f1048b6 100644
--- a/src/rootserver/ddl_task/ob_index_build_task.h
+++ b/src/rootserver/ddl_task/ob_index_build_task.h
@@ -116,8 +116,6 @@ public:
       const int ret_code,
       const ObDDLTaskInfo &addition_info);
   virtual int process() override;
-  virtual void flt_set_task_span_tag() const override;
-  virtual void flt_set_status_span_tag() const override;
   virtual int cleanup_impl() override;
   virtual bool is_valid() const override;
   virtual int collect_longops_stat(share::ObLongopsValue &value) override;
diff --git a/src/rootserver/ddl_task/ob_modify_autoinc_task.cpp b/src/rootserver/ddl_task/ob_modify_autoinc_task.cpp
index 8c4ec89858..324b2a33f4 100644
--- a/src/rootserver/ddl_task/ob_modify_autoinc_task.cpp
+++ b/src/rootserver/ddl_task/ob_modify_autoinc_task.cpp
@@ -673,39 +673,3 @@ int64_t ObModifyAutoincTask::get_serialize_param_size() const
 {
   return alter_table_arg_.get_serialize_size() + ObDDLTask::get_serialize_param_size();
 }
-
-void ObModifyAutoincTask::flt_set_task_span_tag() const
-{
-  FLT_SET_TAG(ddl_task_id, task_id_, ddl_parent_task_id, parent_task_id_,
-              ddl_data_table_id, object_id_, ddl_schema_version, schema_version_,
-              ddl_snapshot_version, snapshot_version_, ddl_ret_code, ret_code_);
-}
-
-void ObModifyAutoincTask::flt_set_status_span_tag() const
-{
-  switch (task_status_) {
-  case ObDDLTaskStatus::WAIT_TRANS_END: {
-    FLT_SET_TAG(ddl_data_table_id, object_id_, ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::OBTAIN_SNAPSHOT: {
-    FLT_SET_TAG(ddl_data_table_id, object_id_, ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::MODIFY_AUTOINC: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::FAIL: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::SUCCESS: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  default: {
-    break;
-  }
-  }
-}
diff --git a/src/rootserver/ddl_task/ob_modify_autoinc_task.h b/src/rootserver/ddl_task/ob_modify_autoinc_task.h
index 37900a8833..f810e495eb 100644
--- a/src/rootserver/ddl_task/ob_modify_autoinc_task.h
+++ b/src/rootserver/ddl_task/ob_modify_autoinc_task.h
@@ -69,8 +69,6 @@ public:
   virtual int deserialize_params_from_message(const uint64_t tenant_id, const char *buf, const int64_t buf_size, int64_t &pos) override;
   virtual int64_t get_serialize_param_size() const override;
   int notify_update_autoinc_finish(const uint64_t autoinc_val, const int ret_code);
-  virtual void flt_set_task_span_tag() const override;
-  virtual void flt_set_status_span_tag() const override;
   virtual int cleanup_impl() override;
 private:
   int unlock_table();
diff --git a/src/rootserver/ddl_task/ob_table_redefinition_task.cpp b/src/rootserver/ddl_task/ob_table_redefinition_task.cpp
index 36e761f3ae..e3c74d5db1 100755
--- a/src/rootserver/ddl_task/ob_table_redefinition_task.cpp
+++ b/src/rootserver/ddl_task/ob_table_redefinition_task.cpp
@@ -1443,62 +1443,6 @@ int ObTableRedefinitionTask::collect_longops_stat(ObLongopsValue &value)
   return ret;
 }
 
-void ObTableRedefinitionTask::flt_set_task_span_tag() const
-{
-  FLT_SET_TAG(ddl_task_id, task_id_, ddl_parent_task_id, parent_task_id_,
-              ddl_data_table_id, object_id_, ddl_schema_version, schema_version_,
-              ddl_ret_code, ret_code_);
-}
-
-void ObTableRedefinitionTask::flt_set_status_span_tag() const
-{
-  switch (task_status_) {
-  case ObDDLTaskStatus::PREPARE: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::WAIT_TRANS_END: {
-    FLT_SET_TAG(ddl_data_table_id, object_id_, ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::OBTAIN_SNAPSHOT: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::CHECK_TABLE_EMPTY: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::REDEFINITION: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::COPY_TABLE_DEPENDENT_OBJECTS: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::MODIFY_AUTOINC: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::TAKE_EFFECT: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::FAIL: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  case ObDDLTaskStatus::SUCCESS: {
-    FLT_SET_TAG(ddl_ret_code, ret_code_);
-    break;
-  }
-  default: {
-    break;
-  }
-  }
-}
-
 int ObTableRedefinitionTask::get_direct_load_job_stat(common::ObArenaAllocator &allocator,
                                                       sql::ObLoadDataStat &job_stat)
 {
diff --git a/src/rootserver/ddl_task/ob_table_redefinition_task.h b/src/rootserver/ddl_task/ob_table_redefinition_task.h
index c6799462f0..4377f8a2a2 100644
--- a/src/rootserver/ddl_task/ob_table_redefinition_task.h
+++ b/src/rootserver/ddl_task/ob_table_redefinition_task.h
@@ -65,8 +65,6 @@ public:
   int assign(const ObTableRedefinitionTask *table_redef_task);
   virtual int collect_longops_stat(share::ObLongopsValue &value) override;
   virtual bool support_longops_monitoring() const override { return true; }
-  virtual void flt_set_task_span_tag() const override;
-  virtual void flt_set_status_span_tag() const override;
   static bool check_task_status_is_pending(const share::ObDDLTaskStatus task_status);
   INHERIT_TO_STRING_KV("ObDDLRedefinitionTask", ObDDLRedefinitionTask,
       K(has_rebuild_index_), K(has_rebuild_constraint_), K(has_rebuild_foreign_key_),
diff --git a/src/share/ob_ddl_common.cpp b/src/share/ob_ddl_common.cpp
index d8d87150c2..ad5e8e93bf 100644
--- a/src/share/ob_ddl_common.cpp
+++ b/src/share/ob_ddl_common.cpp
@@ -1942,29 +1942,11 @@ int ObDDLUtil::get_data_information(
 
         task_status = static_cast<share::ObDDLTaskStatus>(cur_task_status);
         if (OB_SUCC(ret)) {
-          if (is_create_index(ddl_type)) {
-            SMART_VAR(rootserver::ObIndexBuildTask, task) {
-              if (OB_FAIL(task.deserialize_params_from_message(tenant_id, task_message.ptr(), task_message.length(), pos))) {
-                LOG_WARN("deserialize from msg failed", K(ret));
-              } else {
-                data_format_version = task.get_data_format_version();
-              }
-            }
-          } else if (is_complement_data_relying_on_dag(ddl_type)) {
-            SMART_VAR(rootserver::ObColumnRedefinitionTask, task) {
-              if (OB_FAIL(task.deserialize_params_from_message(tenant_id, task_message.ptr(), task_message.length(), pos))) {
-                LOG_WARN("deserialize from msg failed", K(ret));
-              } else {
-                data_format_version = task.get_data_format_version();
-              }
-            }
-          } else {
-            SMART_VAR(rootserver::ObTableRedefinitionTask, task) {
-              if (OB_FAIL(task.deserialize_params_from_message(tenant_id, task_message.ptr(), task_message.length(), pos))) {
-                LOG_WARN("deserialize from msg failed", K(ret));
-              } else {
-                data_format_version = task.get_data_format_version();
-              }
+          SMART_VAR(rootserver::ObDDLTask, task) {
+            if (OB_FAIL(task.deserialize_params_from_message(tenant_id, task_message.ptr(), task_message.length(), pos))) {
+              LOG_WARN("deserialize from msg failed", K(ret));
+            } else {
+              data_format_version = task.get_data_format_version();
             }
           }
         }