diff --git a/include/libs/planner/planner.h b/include/libs/planner/planner.h
index 16271310e5..3f4d21a746 100644
--- a/include/libs/planner/planner.h
+++ b/include/libs/planner/planner.h
@@ -138,8 +138,11 @@ typedef struct SQueryDag {
  */
 int32_t qCreateQueryDag(const struct SQueryStmtInfo* pQueryInfo, struct SEpSet* pQnode, struct SQueryDag** pDag);
 
-// @eps is an array of SEpAddr structures
-int32_t qSetSubplanExecutionNode(SSubplan* subplan, SArray* eps);
+// Set datasource of this subplan, multiple calls may be made to a subplan.
+// @subplan subplan to be schedule
+// @templateId templateId of a group of datasource subplans of this @subplan
+// @eps Execution location of this group of datasource subplans, is an array of SEpAddr structures 
+int32_t qSetSubplanExecutionNode(SSubplan* subplan, uint64_t templateId, SArray* eps);
 
 int32_t qExplainQuery(const struct SQueryStmtInfo* pQueryInfo, struct SEpSet* pQnode, char** str);
 
diff --git a/source/libs/planner/inc/plannerInt.h b/source/libs/planner/inc/plannerInt.h
index 68a9518680..19563a8a0c 100644
--- a/source/libs/planner/inc/plannerInt.h
+++ b/source/libs/planner/inc/plannerInt.h
@@ -100,8 +100,9 @@ int32_t queryPlanToString(struct SQueryPlanNode* pQueryNode, char** str);
 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, SArray* eps);
 int32_t subPlanToString(const SSubplan *pPhyNode, char** str);
+int32_t stringToSubplan(const char* str, SSubplan** subplan);
 
 /**
  * Destroy the query plan object.
diff --git a/source/libs/planner/src/physicalPlan.c b/source/libs/planner/src/physicalPlan.c
index 5a891d4b28..f187ec0ec9 100644
--- a/source/libs/planner/src/physicalPlan.c
+++ b/source/libs/planner/src/physicalPlan.c
@@ -19,6 +19,13 @@
 #define STORE_CURRENT_SUBPLAN(cxt) SSubplan* _ = cxt->pCurrentSubplan
 #define RECOVERY_CURRENT_SUBPLAN(cxt) cxt->pCurrentSubplan = _
 
+typedef struct SPlanContext {
+  struct SCatalog* pCatalog;
+  struct SQueryDag* pDag;
+  SSubplan* pCurrentSubplan;
+  SSubplanId nextId;
+} SPlanContext;
+
 static const char* gOpName[] = {
   "Unknown",
 #define INCLUDE_AS_NAME
@@ -26,12 +33,14 @@ static const char* gOpName[] = {
 #undef INCLUDE_AS_NAME
 };
 
-typedef struct SPlanContext {
-  struct SCatalog* pCatalog;
-  struct SQueryDag* pDag;
-  SSubplan* pCurrentSubplan;
-  SSubplanId nextId;
-} SPlanContext;
+int32_t opNameToOpType(const char* name) {
+  for (int32_t i = 1; i < sizeof(gOpName) / sizeof(gOpName[0]); ++i) {
+    if (strcmp(name, gOpName[i])) {
+      return i;
+    }
+  }
+  return OP_Unknown;
+}
 
 static void toDataBlockSchema(SQueryPlanNode* pPlanNode, SDataBlockSchema* dataBlockSchema) {
   SWAP(dataBlockSchema->pSchema, pPlanNode->pSchema, SSchema*);
@@ -216,11 +225,6 @@ int32_t createDag(SQueryPlanNode* pQueryNode, struct SCatalog* pCatalog, SQueryD
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t opNameToOpType(const char* name) {
-  for (int32_t i = 1; i < sizeof(gOpName) / sizeof(gOpName[0]); ++i) {
-    if (strcmp(name, gOpName[i])) {
-      return i;
-    }
-  }
-  return OP_Unknown;
+int32_t setSubplanExecutionNode(SSubplan* subplan, uint64_t templateId, SArray* eps) {
+  //todo
 }
diff --git a/source/libs/planner/src/planner.c b/source/libs/planner/src/planner.c
index 3d2bb895d5..3a90acb5fd 100644
--- a/source/libs/planner/src/planner.c
+++ b/source/libs/planner/src/planner.c
@@ -46,6 +46,10 @@ int32_t qCreateQueryDag(const struct SQueryStmtInfo* pQueryInfo, struct SEpSet*
   return TSDB_CODE_SUCCESS;
 }
 
+int32_t qSetSubplanExecutionNode(SSubplan* subplan, uint64_t templateId, SArray* eps) {
+  return setSubplanExecutionNode(subplan, templateId, eps);
+}
+
 int32_t qSubPlanToString(const SSubplan *subplan, char** str) {
   return subPlanToString(subplan, str);
 }