diff --git a/src/observer/table_load/client/ob_table_direct_load_rpc_executor.cpp b/src/observer/table_load/client/ob_table_direct_load_rpc_executor.cpp
index 6075addbba..bc6de6eaf9 100644
--- a/src/observer/table_load/client/ob_table_direct_load_rpc_executor.cpp
+++ b/src/observer/table_load/client/ob_table_direct_load_rpc_executor.cpp
@@ -531,8 +531,9 @@ int ObTableDirectLoadInsertExecutor::set_batch_seq_no(int64_t batch_id,
   } else {
     for (int64_t i = 0; OB_SUCC(ret) && i < obj_row_array.count(); ++i) {
       ObTableLoadObjRow &row = obj_row_array.at(i);
-      row.seq_no_.batch_id_ = batch_id;
-      row.seq_no_.batch_seq_no_ = i;
+      row.seq_no_.sequence_no_ = batch_id;
+      row.seq_no_.sequence_no_ <<= ObTableLoadSequenceNo::BATCH_ID_SHIFT;
+      row.seq_no_.sequence_no_ |= i;
     }
   }
   return ret;
diff --git a/src/share/table/ob_table_load_define.h b/src/share/table/ob_table_load_define.h
index 47c9fb4510..67c609ac15 100644
--- a/src/share/table/ob_table_load_define.h
+++ b/src/share/table/ob_table_load_define.h
@@ -438,32 +438,20 @@ public:
 
 struct ObTableLoadSequenceNo
 {
- OB_UNIS_VERSION(1);
+  OB_UNIS_VERSION(1);
 public:
-  static const uint64_t MAX_DATA_ID  = (1LL << 16) - 1;
-  static const uint64_t MAX_CHUNK_ID  = (1LL << 32) - 1;
-  static const uint64_t MAX_BATCH_ID  = (1LL << 48) - 1;
-  static const uint64_t MAX_DATA_SEQ_NO  = (1LL << 48) - 1;
-  static const uint64_t MAX_CHUNK_SEQ_NO  = (1LL << 32) - 1;
-  static const uint64_t MAX_BATCH_SEQ_NO  = (1LL << 16) - 1;
-  union {
-    // multi file
-    struct {
-      uint64_t data_id_ : 16;
-      uint64_t data_seq_no_ : 48;
-    };
-    // single file
-    struct {
-      uint64_t chunk_id_ : 32;
-      uint64_t chunk_seq_no_ : 32;
-    };
-    // client
-    struct {
-      uint64_t batch_id_ : 48;
-      uint64_t batch_seq_no_ : 16;
-    };
-    uint64_t sequence_no_;
-  };
+  static const int32_t DATA_ID_SHIFT = 48;   // multi file sequence_no_ = [data_id << 48 | data_seq_no]
+  static const int32_t CHUNK_ID_SHIFT = 32;  // single file sequence_no_ = [chunk_id << 32 | chunk_seq_no]
+  static const int32_t BATCH_ID_SHIFT = 16;  // java client sequence_no_ = [batch_id << 16 | batch_seq_no]
+
+  static const uint64_t MAX_DATA_ID  = (1LL << (64 - DATA_ID_SHIFT)) - 1;
+  static const uint64_t MAX_CHUNK_ID  = (1LL << (64 - CHUNK_ID_SHIFT)) - 1;
+  static const uint64_t MAX_BATCH_ID  = (1LL << (64 - BATCH_ID_SHIFT)) - 1;
+  static const uint64_t MAX_DATA_SEQ_NO  = (1LL << DATA_ID_SHIFT) - 1;
+  static const uint64_t MAX_CHUNK_SEQ_NO  = (1LL << CHUNK_ID_SHIFT) - 1;
+  static const uint64_t MAX_BATCH_SEQ_NO  = (1LL << BATCH_ID_SHIFT) - 1;
+  uint64_t sequence_no_;
+
   ObTableLoadSequenceNo() : sequence_no_(OB_INVALID_ID) {}
   ObTableLoadSequenceNo(uint64_t sequence_no) { sequence_no_ = sequence_no; }
   void reset() { sequence_no_ = OB_INVALID_ID; }
@@ -494,7 +482,7 @@ public:
     sequence_no_--;
     return tmp;
   }
-  TO_STRING_KV(K_(sequence_no), K_(data_id), K_(data_seq_no), K_(chunk_id), K_(chunk_seq_no), K_(batch_id), K_(batch_seq_no));
+  TO_STRING_KV(K_(sequence_no));
 };
 
 } // namespace table
diff --git a/src/share/table/ob_table_load_row.h b/src/share/table/ob_table_load_row.h
index 8b4acc7e76..3263af5c68 100644
--- a/src/share/table/ob_table_load_row.h
+++ b/src/share/table/ob_table_load_row.h
@@ -49,7 +49,13 @@ public:
   {
     return seq_no_;
   }
-  TO_STRING_KV(K_(count));
+
+  int64_t to_string(char* buf, const int64_t buf_len) const {
+    int64_t pos = 0;
+    databuff_printf(buf, buf_len, pos, "seq=%lu ", seq_no_.sequence_no_);
+    databuff_print_obj_array(buf, buf_len, pos, cells_, count_);
+    return pos;
+  }
 
 private:
   static int allocate_cells(T *&cells, int64_t count,
diff --git a/src/sql/engine/cmd/ob_load_data_direct_impl.cpp b/src/sql/engine/cmd/ob_load_data_direct_impl.cpp
index 493648867f..40a6a9ed3f 100644
--- a/src/sql/engine/cmd/ob_load_data_direct_impl.cpp
+++ b/src/sql/engine/cmd/ob_load_data_direct_impl.cpp
@@ -1524,8 +1524,8 @@ int ObLoadDataDirectImpl::LargeFileLoadExecutor::get_next_task_handle(TaskHandle
     handle->data_desc_ = data_desc_;
     handle->start_line_no_ = total_line_no_ ;
     handle->result_.created_ts_ = ObTimeUtil::current_time();
-    handle->sequence_no_.chunk_id_ = chunk_id;
-    handle->sequence_no_.chunk_seq_no_ = 0;
+    handle->sequence_no_.sequence_no_ = chunk_id;
+    handle->sequence_no_.sequence_no_ <<= ObTableLoadSequenceNo::CHUNK_ID_SHIFT;
     handle->data_buffer_.swap(expr_buffer_);
     handle->data_buffer_.is_end_file_ = data_reader_.is_end_file();
     total_line_no_ += current_line_count;
@@ -1792,8 +1792,8 @@ int ObLoadDataDirectImpl::MultiFilesLoadExecutor::get_next_task_handle(TaskHandl
     handle->data_desc_ = data_desc;
     handle->start_line_no_ = 0;
     handle->result_.created_ts_ = ObTimeUtil::current_time();
-    handle->sequence_no_.data_id_ = data_id;
-    handle->sequence_no_.data_seq_no_ = 0;
+    handle->sequence_no_.sequence_no_ = data_id;
+    handle->sequence_no_.sequence_no_ <<= ObTableLoadSequenceNo::DATA_ID_SHIFT;
   }
   return ret;
 }