diff --git a/deps/oblib/src/lib/ob_define.h b/deps/oblib/src/lib/ob_define.h
index 12c06a58e4..01d2a7902e 100644
--- a/deps/oblib/src/lib/ob_define.h
+++ b/deps/oblib/src/lib/ob_define.h
@@ -210,6 +210,7 @@ const uint64_t OB_SERVER_USER_ID = 0;
 const int64_t OB_MAX_INDEX_PER_TABLE = 128;
 const int64_t OB_MAX_SSTABLE_PER_TABLE = OB_MAX_INDEX_PER_TABLE + 1;
 const int64_t OB_MAX_SQL_LENGTH = 64 * 1024;
+const int64_t OB_TINY_SQL_LENGTH = 128;
 const int64_t OB_SHORT_SQL_LENGTH = 1 * 1024; // 1KB
 const int64_t OB_MEDIUM_SQL_LENGTH = 2 * OB_SHORT_SQL_LENGTH; // 2KB
 const int64_t OB_MAX_PROXY_SQL_STORE_LENGTH = 8 * 1024; // 8KB
diff --git a/src/sql/executor/ob_task.cpp b/src/sql/executor/ob_task.cpp
index 62f5231bbe..74caef8bdd 100644
--- a/src/sql/executor/ob_task.cpp
+++ b/src/sql/executor/ob_task.cpp
@@ -41,6 +41,7 @@ ObTask::ObTask()
       location_idx_(OB_INVALID_INDEX),
       max_sql_no_(-1)
 {
+  sql_string_[0] = '\0';
 }
 
 ObTask::~ObTask()
@@ -92,6 +93,7 @@ OB_DEF_SERIALIZE(ObTask)
   }
   LST_DO_CODE(OB_UNIS_ENCODE, ranges_);
   LST_DO_CODE(OB_UNIS_ENCODE, max_sql_no_);
+  OB_UNIS_ENCODE(ObString(sql_string_));
   return ret;
 }
 
@@ -153,6 +155,8 @@ OB_DEF_DESERIALIZE(ObTask)
     }
   }
   LST_DO_CODE(OB_UNIS_DECODE, max_sql_no_);
+  ObString sql_string;
+  OB_UNIS_DECODE(sql_string);
   return ret;
 }
 
@@ -184,6 +188,7 @@ OB_DEF_SERIALIZE_SIZE(ObTask)
     LST_DO_CODE(OB_UNIS_ADD_LEN, ranges_);
   }
   LST_DO_CODE(OB_UNIS_ADD_LEN, max_sql_no_);
+  OB_UNIS_ADD_LEN(ObString(sql_string_));
   return len;
 }
 
diff --git a/src/sql/executor/ob_task.h b/src/sql/executor/ob_task.h
index fa82051360..f2caf349f4 100644
--- a/src/sql/executor/ob_task.h
+++ b/src/sql/executor/ob_task.h
@@ -97,6 +97,7 @@ protected:
   // 本Task涉及到的扫描范围，默认涉及的一张表（一个或者多个partition）
   common::ObSEArray<ObNewRange, 32> ranges_;
   int64_t max_sql_no_;
+  char sql_string_[common::OB_TINY_SQL_LENGTH + 1];
   //DISALLOW_COPY_AND_ASSIGN(ObTask);
 };
 
diff --git a/src/sql/session/ob_basic_session_info.cpp b/src/sql/session/ob_basic_session_info.cpp
index 0d226e2aeb..632853cde2 100644
--- a/src/sql/session/ob_basic_session_info.cpp
+++ b/src/sql/session/ob_basic_session_info.cpp
@@ -4445,6 +4445,7 @@ OB_DEF_SERIALIZE(ObBasicSessionInfo)
               is_client_sessid_support_,
               use_rich_vector_format_);
   }();
+  OB_UNIS_ENCODE(ObString(sql_id_));
   return ret;
 }
 
@@ -4690,6 +4691,8 @@ OB_DEF_DESERIALIZE(ObBasicSessionInfo)
   release_to_pool_ = OB_SUCC(ret);
   force_rich_vector_format_ = ForceRichFormatStatus::Disable;
   }();
+  ObString sql_id;
+  OB_UNIS_DECODE(sql_id);
   return ret;
 }
 
@@ -4963,6 +4966,7 @@ OB_DEF_SERIALIZE_SIZE(ObBasicSessionInfo)
               exec_min_cluster_version_,
               is_client_sessid_support_,
               use_rich_vector_format_);
+  OB_UNIS_ADD_LEN(ObString(sql_id_));
   return len;
 }