diff --git a/include/libs/planner/planner.h b/include/libs/planner/planner.h
index 153cf0bb3e..d4469be5e3 100644
--- a/include/libs/planner/planner.h
+++ b/include/libs/planner/planner.h
@@ -119,9 +119,9 @@ typedef struct SSubplanId {
 
 typedef struct SSubplan {
   SSubplanId id;          // unique id of the subplan
-  int32_t    type;         // QUERY_TYPE_MERGE|QUERY_TYPE_PARTIAL|QUERY_TYPE_SCAN
+  int32_t    type;         // QUERY_TYPE_MERGE|QUERY_TYPE_PARTIAL|QUERY_TYPE_SCAN|QUERY_TYPE_MODIFY
   int32_t    level;        // the execution level of current subplan, starting from 0.
-  SEpSet     execEpSet;    // for the scan sub plan, the optional execution node
+  SEpSet     execEpSet;    // for the scan/modify subplan, the optional execution node
   SArray    *pChildern;    // the datasource subplan,from which to fetch the result
   SArray    *pParents;     // the data destination subplan, get data from current subplan
   SPhyNode  *pNode;        // physical plan of current subplan
@@ -152,7 +152,7 @@ int32_t qExplainQuery(const struct SQueryNode* pQueryInfo, struct SEpSet* pQnode
 /**
  * Convert to subplan to string for the scheduler to send to the executor
  */
-int32_t qSubPlanToString(const SSubplan* subplan, char** str);
+int32_t qSubPlanToString(const SSubplan* subplan, char** str, int32_t* len);
 
 int32_t qStringToSubplan(const char* str, SSubplan** subplan);
 
diff --git a/source/libs/planner/inc/plannerInt.h b/source/libs/planner/inc/plannerInt.h
index 1bee95b8e5..ed29839905 100644
--- a/source/libs/planner/inc/plannerInt.h
+++ b/source/libs/planner/inc/plannerInt.h
@@ -102,7 +102,7 @@ int32_t queryPlanToSql(struct SQueryPlanNode* pQueryNode, char** sql);
 
 int32_t createDag(SQueryPlanNode* pQueryNode, struct SCatalog* pCatalog, SQueryDag** pDag);
 int32_t setSubplanExecutionNode(SSubplan* subplan, uint64_t templateId, SEpAddr* ep);
-int32_t subPlanToString(const SSubplan *pPhyNode, char** str);
+int32_t subPlanToString(const SSubplan *pPhyNode, char** str, int32_t* len);
 int32_t stringToSubplan(const char* str, SSubplan** subplan);
 
 /**
@@ -121,6 +121,9 @@ void* destroyQueryPhyPlan(struct SPhyNode* pQueryPhyNode);
 const char* opTypeToOpName(int32_t type);
 int32_t opNameToOpType(const char* name);
 
+const char* dsinkTypeToDsinkName(int32_t type);
+int32_t dsinkNameToDsinkType(const char* name);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/libs/planner/src/physicalPlan.c b/source/libs/planner/src/physicalPlan.c
index 9db9e059b3..8388458b4c 100644
--- a/source/libs/planner/src/physicalPlan.c
+++ b/source/libs/planner/src/physicalPlan.c
@@ -47,16 +47,38 @@ const char* opTypeToOpName(int32_t type) {
 
 int32_t opNameToOpType(const char* name) {
   for (int32_t i = 1; i < sizeof(gOpName) / sizeof(gOpName[0]); ++i) {
-    if (strcmp(name, gOpName[i])) {
+    if (0 == strcmp(name, gOpName[i])) {
       return i;
     }
   }
   return OP_Unknown;
 }
 
+const char* dsinkTypeToDsinkName(int32_t type) {
+  switch (type) {
+    case DSINK_Dispatch:
+      return "Dispatch";
+    case DSINK_Insert:
+      return "Insert";
+    default:
+      break;
+  }
+  return "Unknown";
+}
+
+int32_t dsinkNameToDsinkType(const char* name) {
+  if (0 == strcmp(name, "Dispatch")) {
+    return DSINK_Dispatch;
+  } else if (0 == strcmp(name, "Insert")) {
+    return DSINK_Insert;
+  }
+  return DSINK_Unknown;
+}
+
 static SDataSink* initDataSink(int32_t type, int32_t size) {
   SDataSink* sink = (SDataSink*)vailidPointer(calloc(1, size));
   sink->info.type = type;
+  sink->info.name = dsinkTypeToDsinkName(type);
   return sink;
 }
 
diff --git a/source/libs/planner/src/physicalPlanJson.c b/source/libs/planner/src/physicalPlanJson.c
index 15c0e632a7..bf052f34b4 100644
--- a/source/libs/planner/src/physicalPlanJson.c
+++ b/source/libs/planner/src/physicalPlanJson.c
@@ -695,6 +695,70 @@ static bool phyNodeFromJson(const cJSON* json, void* obj) {
   return res;
 }
 
+static const char* jkInserterNumOfTables = "NumOfTables";
+static const char* jkInserterDataSize = "DataSize";
+
+static bool inserterToJson(const void* obj, cJSON* json) {
+  const SDataInserter* inserter = (const SDataInserter*)obj;
+  bool res = cJSON_AddNumberToObject(json, jkInserterNumOfTables, inserter->numOfTables);
+  if (res) {
+    res = cJSON_AddNumberToObject(json, jkInserterDataSize, inserter->size);
+  }
+  // todo pData
+  return res;
+}
+
+static bool inserterFromJson(const cJSON* json, void* obj) {
+  SDataInserter* inserter = (SDataInserter*)obj;
+  inserter->numOfTables = getNumber(json, jkInserterNumOfTables);
+  inserter->size = getNumber(json, jkInserterDataSize);
+  // todo pData
+}
+
+static bool specificDataSinkToJson(const void* obj, cJSON* json) {
+  const SDataSink* dsink = (const SDataSink*)obj;
+  switch (dsink->info.type) {
+    case DSINK_Dispatch:
+      return true;
+    case DSINK_Insert:
+      return inserterToJson(obj, json);
+    default:
+      break;
+  }
+  return false;
+}
+
+static bool specificDataSinkFromJson(const cJSON* json, void* obj) {
+  SDataSink* dsink = (SDataSink*)obj;
+  switch (dsink->info.type) {
+    case DSINK_Dispatch:
+      return true;
+    case DSINK_Insert:
+      return inserterFromJson(json, obj);
+    default:
+      break;
+  }
+  return false;
+}
+
+static const char* jkDataSinkName = "Name";
+
+static bool dataSinkToJson(const void* obj, cJSON* json) {
+  const SDataSink* dsink = (const SDataSink*)obj;
+  bool res = cJSON_AddStringToObject(json, jkDataSinkName, dsink->info.name);
+  if (res) {
+    res = addObject(json, dsink->info.name, specificDataSinkToJson, dsink);
+  }
+  return res;
+}
+
+static bool dataSinkFromJson(const cJSON* json, void* obj) {
+  SDataSink* dsink = (SDataSink*)obj;
+  dsink->info.name = getString(json, jkDataSinkName);
+  dsink->info.type = dsinkNameToDsinkType(dsink->info.name);
+  return fromObject(json, dsink->info.name, specificDataSinkFromJson, dsink, true);
+}
+
 static const char* jkIdQueryId = "QueryId";
 static const char* jkIdTemplateId = "TemplateId";
 static const char* jkIdSubplanId = "SubplanId";
@@ -721,6 +785,7 @@ static bool subplanIdFromJson(const cJSON* json, void* obj) {
 
 static const char* jkSubplanId = "Id";
 static const char* jkSubplanNode = "Node";
+static const char* jkSubplanDataSink = "DataSink";
 
 static cJSON* subplanToJson(const SSubplan* subplan) {
   cJSON* jSubplan = cJSON_CreateObject();
@@ -734,6 +799,9 @@ static cJSON* subplanToJson(const SSubplan* subplan) {
   if (res) {
     res = addObject(jSubplan, jkSubplanNode, phyNodeToJson, subplan->pNode);
   }
+  if (res) {
+    res = addObject(jSubplan, jkSubplanDataSink, dataSinkToJson, subplan->pDataSink);
+  }
 
   if (!res) {
     cJSON_Delete(jSubplan);
@@ -751,6 +819,9 @@ static SSubplan* subplanFromJson(const cJSON* json) {
   if (res) {
     res = fromObjectWithAlloc(json, jkSubplanNode, phyNodeFromJson, (void**)&subplan->pNode, sizeof(SPhyNode), false);
   }
+  if (res) {
+    res = fromObjectWithAlloc(json, jkSubplanDataSink, dataSinkFromJson, (void**)&subplan->pDataSink, sizeof(SDataSink), false);
+  }
   
   if (!res) {
     qDestroySubplan(subplan);
@@ -759,13 +830,22 @@ static SSubplan* subplanFromJson(const cJSON* json) {
   return subplan;
 }
 
-int32_t subPlanToString(const SSubplan* subplan, char** str) {
+int32_t subPlanToString(const SSubplan* subplan, char** str, int32_t* len) {
+  if (QUERY_TYPE_MODIFY == subplan->type) {
+    SDataInserter* insert = (SDataInserter*)(subplan->pDataSink);
+    *len = insert->size;
+    *str = insert->pData;
+    insert->pData == NULL;
+    return TSDB_CODE_SUCCESS;
+  }
+
   cJSON* json = subplanToJson(subplan);
   if (NULL == json) {
     terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
     return TSDB_CODE_FAILED;
   }
   *str = cJSON_Print(json);
+  *len = strlen(*str);
   return TSDB_CODE_SUCCESS;
 }
 
diff --git a/source/libs/planner/src/planner.c b/source/libs/planner/src/planner.c
index 7722a7d363..e8523249e4 100644
--- a/source/libs/planner/src/planner.c
+++ b/source/libs/planner/src/planner.c
@@ -50,8 +50,8 @@ int32_t qSetSubplanExecutionNode(SSubplan* subplan, uint64_t templateId, SEpAddr
   return setSubplanExecutionNode(subplan, templateId, ep);
 }
 
-int32_t qSubPlanToString(const SSubplan *subplan, char** str) {
-  return subPlanToString(subplan, str);
+int32_t qSubPlanToString(const SSubplan *subplan, char** str, int32_t* len) {
+  return subPlanToString(subplan, str, len);
 }
 
 int32_t qStringToSubplan(const char* str, SSubplan** subplan) {
diff --git a/source/libs/planner/test/phyPlanTests.cpp b/source/libs/planner/test/phyPlanTests.cpp
index 3be3337304..ddd1151742 100644
--- a/source/libs/planner/test/phyPlanTests.cpp
+++ b/source/libs/planner/test/phyPlanTests.cpp
@@ -62,8 +62,9 @@ protected:
       size_t num = taosArrayGetSize(subplans);
       for (size_t j = 0; j < num; ++j) {
         std::cout << "no " << j << ":" << std::endl;
+        int32_t len = 0;
         char* str = nullptr;
-        ASSERT_EQ (TSDB_CODE_SUCCESS, qSubPlanToString((const SSubplan*)taosArrayGetP(subplans, j), &str));
+        ASSERT_EQ (TSDB_CODE_SUCCESS, qSubPlanToString((const SSubplan*)taosArrayGetP(subplans, j), &str, &len));
         std::cout << str << std::endl;
         free(str);
       }
diff --git a/source/libs/scheduler/src/scheduler.c b/source/libs/scheduler/src/scheduler.c
index 99a9b06fe4..5671a0d747 100644
--- a/source/libs/scheduler/src/scheduler.c
+++ b/source/libs/scheduler/src/scheduler.c
@@ -521,8 +521,8 @@ _return:
 
 int32_t schLaunchTask(SQueryJob *job, SQueryTask *task) {
   SSubplan *plan = task->plan;
-  
-  SCH_ERR_RET(qSubPlanToString(plan, &task->msg));
+  int32_t len = 0;
+  SCH_ERR_RET(qSubPlanToString(plan, &task->msg, &len));
   if (plan->execEpSet.numOfEps <= 0) {
     SCH_ERR_RET(schSetTaskExecEpSet(job, &plan->execEpSet));
   }