diff --git a/src/sql/das/ob_das_task.cpp b/src/sql/das/ob_das_task.cpp
index db632fdc8..3e30e1ac7 100644
--- a/src/sql/das/ob_das_task.cpp
+++ b/src/sql/das/ob_das_task.cpp
@@ -82,6 +82,7 @@ OB_DEF_SERIALIZE(ObDASRemoteInfo)
   OB_UNIS_ENCODE(user_id_);
   OB_UNIS_ENCODE(session_id_);
   OB_UNIS_ENCODE(plan_id_);
+  OB_UNIS_ENCODE(plan_hash_);
   return ret;
 }
 
@@ -175,6 +176,7 @@ OB_DEF_DESERIALIZE(ObDASRemoteInfo)
   OB_UNIS_DECODE(user_id_);
   OB_UNIS_DECODE(session_id_);
   OB_UNIS_DECODE(plan_id_);
+  OB_UNIS_DECODE(plan_hash_);
   return ret;
 }
 
@@ -213,6 +215,7 @@ OB_DEF_SERIALIZE_SIZE(ObDASRemoteInfo)
   OB_UNIS_ADD_LEN(user_id_);
   OB_UNIS_ADD_LEN(session_id_);
   OB_UNIS_ADD_LEN(plan_id_);
+  OB_UNIS_ADD_LEN(plan_hash_);
   return len;
 }
 
diff --git a/src/sql/das/ob_das_task.h b/src/sql/das/ob_das_task.h
index b6ebaecbb..d42e8f87b 100644
--- a/src/sql/das/ob_das_task.h
+++ b/src/sql/das/ob_das_task.h
@@ -55,7 +55,8 @@ public:
       flags_(0),
       user_id_(0),
       session_id_(0),
-      plan_id_(0)
+      plan_id_(0),
+      plan_hash_(0)
   {
     sql_id_[0] = '\0';
   }
@@ -88,6 +89,8 @@ public:
   uint64_t user_id_;
   uint64_t session_id_;
   uint64_t plan_id_;
+private:
+  uint64_t plan_hash_; // no use!!!
 };
 
 class ObIDASTaskOp