diff --git a/include/libs/planner/planner.h b/include/libs/planner/planner.h
index 91421a9174f4428fb28d3e40e57a30ea3791501e..da70f2149896e68310b0417ed1fbf9facc57e163 100644
--- a/include/libs/planner/planner.h
+++ b/include/libs/planner/planner.h
@@ -150,7 +150,7 @@ struct SQueryNode;
   * @param requestId
   * @return
   */
-int32_t qCreateQueryDag(const struct SQueryNode* pQueryInfo, struct SQueryDag** pDag, SSchema** pSchema, uint32_t* numOfResCols, uint64_t requestId);
+int32_t qCreateQueryDag(const struct SQueryNode* pQueryInfo, struct SQueryDag** pDag, uint64_t requestId);
 
 // Set datasource of this subplan, multiple calls may be made to a subplan.
 // @subplan subplan to be schedule
diff --git a/include/libs/scheduler/scheduler.h b/include/libs/scheduler/scheduler.h
index 58ec3de32f421bd223426218b31a07c55a77ff8d..aa87dd155b139977483a92a02d2b8f9fa950aed7 100644
--- a/include/libs/scheduler/scheduler.h
+++ b/include/libs/scheduler/scheduler.h
@@ -20,8 +20,10 @@
 extern "C" {
 #endif
 
-#include "planner.h"
 #include "catalog.h"
+#include "planner.h"
+
+struct SSchJob;
 
 typedef struct SSchedulerCfg {
   uint32_t maxJobNum;
@@ -65,7 +67,7 @@ int32_t schedulerInit(SSchedulerCfg *cfg);
  * @param nodeList  Qnode/Vnode address list, element is SQueryNodeAddr
  * @return
  */
-int32_t scheduleExecJob(void *transport, SArray *nodeList, SQueryDag* pDag, void** pJob, SQueryResult *pRes);
+int32_t scheduleExecJob(void *transport, SArray *nodeList, SQueryDag* pDag, struct SSchJob** pJob, SQueryResult *pRes);
 
 /**
  * Process the query job, generated according to the query physical plan.
@@ -73,7 +75,7 @@ int32_t scheduleExecJob(void *transport, SArray *nodeList, SQueryDag* pDag, void
  * @param nodeList  Qnode/Vnode address list, element is SQueryNodeAddr
  * @return
  */
-int32_t scheduleAsyncExecJob(void *transport, SArray *nodeList, SQueryDag* pDag, void** pJob);
+int32_t scheduleAsyncExecJob(void *transport, SArray *nodeList, SQueryDag* pDag, struct SSchJob** pJob);
 
 /**
  * Fetch query result from the remote query executor
@@ -81,7 +83,7 @@ int32_t scheduleAsyncExecJob(void *transport, SArray *nodeList, SQueryDag* pDag,
  * @param data
  * @return
  */
-int32_t scheduleFetchRows(void *pJob, void **data);
+int32_t scheduleFetchRows(struct SSchJob *pJob, void **data);
 
 
 /**
diff --git a/source/client/inc/clientInt.h b/source/client/inc/clientInt.h
index 26afe237c9f4e42c1b1b7b16fb34d50942f2852e..7292375e7fd1f839f309c49c772438eb66e7ce97 100644
--- a/source/client/inc/clientInt.h
+++ b/source/client/inc/clientInt.h
@@ -113,6 +113,7 @@ typedef struct SRequestSendRecvBody {
   tsem_t          rspSem;        // not used now
   void*           fp;
   SShowReqInfo    showInfo;      // todo this attribute will be removed after the query framework being completed.
+  struct SSchJob *pQueryJob;     // query job, created according to sql query DAG.
   SDataBuf        requestMsg;
   SReqResultInfo  resInfo;
 } SRequestSendRecvBody;
@@ -129,7 +130,7 @@ typedef struct SRequestObj {
   char            *msgBuf;
   void            *pInfo;   // sql parse info, generated by parser module
   int32_t          code;
-  uint64_t         affectedRows;
+  uint64_t         affectedRows;  // todo remove it
   SQueryExecMetric metric;
   SRequestSendRecvBody body;
 } SRequestObj;
@@ -161,12 +162,13 @@ int  taos_options_imp(TSDB_OPTION option, const char *str);
 void* openTransporter(const char *user, const char *auth, int32_t numOfThreads);
 
 void processMsgFromServer(void* parent, SRpcMsg* pMsg, SEpSet* pEpSet);
+
 void initMsgHandleFp();
 
 TAOS *taos_connect_internal(const char *ip, const char *user, const char *pass, const char *auth, const char *db, uint16_t port);
-TAOS_RES *taos_query_l(TAOS *taos, const char *sql, int sqlLen);
 
 void *doFetchRow(SRequestObj* pRequest);
+
 void  setResultDataPtr(SReqResultInfo* pResultInfo, TAOS_FIELD* pFields, int32_t numOfCols, int32_t numOfRows);
 
 #ifdef __cplusplus
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 26f97cc6ef1c28061ab2edcc120773a6b81748b5..14cb35355fa4a2d18effaebc1543419e6215975a 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -1,6 +1,10 @@
 
+#include "../../libs/scheduler/inc/schedulerInt.h"
 #include "clientInt.h"
 #include "clientLog.h"
+#include "parser.h"
+#include "planner.h"
+#include "scheduler.h"
 #include "tdef.h"
 #include "tep.h"
 #include "tglobal.h"
@@ -8,9 +12,6 @@
 #include "tnote.h"
 #include "tpagedfile.h"
 #include "tref.h"
-#include "parser.h"
-#include "planner.h"
-#include "scheduler.h"
 
 #define CHECK_CODE_GOTO(expr, lable) \
   do {                               \
@@ -57,6 +58,7 @@ static char* getClusterKey(const char* user, const char* auth, const char* ip, i
 }
 
 static STscObj* taosConnectImpl(const char *ip, const char *user, const char *auth, const char *db, uint16_t port, __taos_async_fn_t fp, void *param, SAppInstInfo* pAppInfo);
+static void  setResSchemaInfo(SReqResultInfo* pResInfo, const SDataBlockSchema* pDataBlockSchema);
 
 TAOS *taos_connect_internal(const char *ip, const char *user, const char *pass, const char *auth, const char *db, uint16_t port) {
   if (taos_init() != TSDB_CODE_SUCCESS) {
@@ -198,36 +200,48 @@ int32_t execDdlQuery(SRequestObj* pRequest, SQueryNode* pQuery) {
 int32_t getPlan(SRequestObj* pRequest, SQueryNode* pQueryNode, SQueryDag** pDag) {
   pRequest->type = pQueryNode->type;
 
-  SSchema *pSchema = NULL;
   SReqResultInfo* pResInfo = &pRequest->body.resInfo;
-
-  int32_t code = qCreateQueryDag(pQueryNode, pDag, &pSchema, &pResInfo->numOfCols, pRequest->requestId);
+  int32_t code = qCreateQueryDag(pQueryNode, pDag, pRequest->requestId);
   if (code != 0) {
     return code;
   }
 
   if (pQueryNode->type == TSDB_SQL_SELECT) {
-    pResInfo->fields = calloc(1, sizeof(TAOS_FIELD));
-    for (int32_t i = 0; i < pResInfo->numOfCols; ++i) {
-      pResInfo->fields[i].bytes = pSchema[i].bytes;
-      pResInfo->fields[i].type = pSchema[i].type;
-      tstrncpy(pResInfo->fields[i].name, pSchema[i].name, tListLen(pResInfo->fields[i].name));
-    }
+    SArray* pa = taosArrayGetP((*pDag)->pSubplans, 0);
+
+    SSubplan* pPlan = taosArrayGetP(pa, 0);
+    SDataBlockSchema* pDataBlockSchema = &(pPlan->pDataSink->schema);
+    setResSchemaInfo(pResInfo, pDataBlockSchema);
+    pRequest->type = TDMT_VND_QUERY;
   }
 
   return code;
 }
 
-int32_t scheduleQuery(SRequestObj* pRequest, SQueryDag* pDag, void** pJob) {
+void setResSchemaInfo(SReqResultInfo* pResInfo, const SDataBlockSchema* pDataBlockSchema) {
+  assert(pDataBlockSchema != NULL && pDataBlockSchema->numOfCols > 0);
+
+  pResInfo->numOfCols = pDataBlockSchema->numOfCols;
+  pResInfo->fields = calloc(pDataBlockSchema->numOfCols, sizeof(pDataBlockSchema->pSchema[0]));
+
+  for (int32_t i = 0; i < pResInfo->numOfCols; ++i) {
+    SSchema* pSchema = &pDataBlockSchema->pSchema[i];
+    pResInfo->fields[i].bytes = pSchema->bytes;
+    pResInfo->fields[i].type  = pSchema->type;
+    tstrncpy(pResInfo->fields[i].name, pSchema[i].name, tListLen(pResInfo->fields[i].name));
+  }
+}
+
+int32_t scheduleQuery(SRequestObj* pRequest, SQueryDag* pDag) {
   if (TSDB_SQL_INSERT == pRequest->type || TSDB_SQL_CREATE_TABLE == pRequest->type) {
     SQueryResult res = {.code = 0, .numOfRows = 0, .msgSize = ERROR_MSG_BUF_DEFAULT_SIZE, .msg = pRequest->msgBuf};
 
-    int32_t code = scheduleExecJob(pRequest->pTscObj->pTransporter, NULL, pDag, pJob, &res);
+    int32_t code = scheduleExecJob(pRequest->pTscObj->pTransporter, NULL, pDag, &pRequest->body.pQueryJob, &res);
     if (code != TSDB_CODE_SUCCESS) {
       // handle error and retry
     } else {
-      if (*pJob != NULL) {
-        scheduleFreeJob(*pJob);
+      if (pRequest->body.pQueryJob != NULL) {
+        scheduleFreeJob(pRequest->body.pQueryJob);
       }
     }
 
@@ -235,7 +249,7 @@ int32_t scheduleQuery(SRequestObj* pRequest, SQueryDag* pDag, void** pJob) {
     return res.code;
   }
 
-  return scheduleAsyncExecJob(pRequest->pTscObj->pTransporter, NULL /*todo appInfo.xxx*/, pDag, pJob);
+  return scheduleAsyncExecJob(pRequest->pTscObj->pTransporter, NULL, pDag, &pRequest->body.pQueryJob);
 }
 
 TAOS_RES *tmq_create_topic(TAOS* taos, const char* name, const char* sql, int sqlLen) {
@@ -312,7 +326,6 @@ TAOS_RES *taos_query_l(TAOS *taos, const char *sql, int sqlLen) {
   SRequestObj *pRequest = NULL;
   SQueryNode  *pQuery   = NULL;
   SQueryDag   *pDag     = NULL;
-  void        *pJob     = NULL;
 
   terrno = TSDB_CODE_SUCCESS;
   CHECK_CODE_GOTO(buildRequest(pTscObj, sql, sqlLen, &pRequest), _return);
@@ -322,9 +335,8 @@ TAOS_RES *taos_query_l(TAOS *taos, const char *sql, int sqlLen) {
     CHECK_CODE_GOTO(execDdlQuery(pRequest, pQuery), _return);
   } else {
     CHECK_CODE_GOTO(getPlan(pRequest, pQuery, &pDag), _return);
-    CHECK_CODE_GOTO(scheduleQuery(pRequest, pDag, &pJob), _return);
+    CHECK_CODE_GOTO(scheduleQuery(pRequest, pDag), _return);
     pRequest->code = terrno;
-    return pRequest;
   }
 
 _return:
@@ -333,6 +345,7 @@ _return:
   if (NULL != pRequest && TSDB_CODE_SUCCESS != terrno) {
     pRequest->code = terrno;
   }
+
   return pRequest;
 }
 
@@ -531,7 +544,10 @@ void* doFetchRow(SRequestObj* pRequest) {
   SReqResultInfo* pResultInfo = &pRequest->body.resInfo;
 
   if (pResultInfo->pData == NULL || pResultInfo->current >= pResultInfo->numOfRows) {
-    if (pRequest->type == TDMT_MND_SHOW) {
+    if (pRequest->type == TDMT_VND_QUERY) {
+      pRequest->type = TDMT_VND_FETCH;
+      scheduleFetchRows(pRequest->body.pQueryJob, &pRequest->body.resInfo.pData);
+    } else if (pRequest->type == TDMT_MND_SHOW) {
       pRequest->type = TDMT_MND_SHOW_RETRIEVE;
     } else if (pRequest->type == TDMT_VND_SHOW_TABLES) {
       pRequest->type = TDMT_VND_SHOW_TABLES_FETCH;
diff --git a/source/client/test/clientTests.cpp b/source/client/test/clientTests.cpp
index af5ad874f80021c6673e8e647723d72428e6fef0..d507c565df07beaac5102b9553a3b7da71733b47 100644
--- a/source/client/test/clientTests.cpp
+++ b/source/client/test/clientTests.cpp
@@ -568,7 +568,7 @@ TEST(testCase, projection_query_tables) {
   TAOS_RES* pRes = taos_query(pConn, "use abc1");
 
 //  pRes = taos_query(pConn, "create table m1 (ts timestamp,  k int) tags(a int)");
-//  taos_free_result(pRes);
+  taos_free_result(pRes);
 //
 //  pRes = taos_query(pConn, "create table tu using m1 tags(1)");
 //  taos_free_result(pRes);
diff --git a/source/libs/planner/src/physicalPlan.c b/source/libs/planner/src/physicalPlan.c
index 7ef434ccf5e1129b2d660a6680d92fc1e74151fa..01fb3c25130b34086427976ed51f86c25290b1f0 100644
--- a/source/libs/planner/src/physicalPlan.c
+++ b/source/libs/planner/src/physicalPlan.c
@@ -89,7 +89,7 @@ static bool copySchema(SDataBlockSchema* dst, const SDataBlockSchema* src) {
 
 static bool toDataBlockSchema(SQueryPlanNode* pPlanNode, SDataBlockSchema* dataBlockSchema) {
   dataBlockSchema->numOfCols = pPlanNode->numOfExpr;
-  dataBlockSchema->pSchema = malloc(sizeof(SSlotSchema) * pPlanNode->numOfCols);
+  dataBlockSchema->pSchema = malloc(sizeof(SSlotSchema) * pPlanNode->numOfExpr);
   if (NULL == dataBlockSchema->pSchema) {
     return false;
   }
@@ -306,8 +306,6 @@ static SPhyNode* createPhyNode(SPlanContext* pCxt, SQueryPlanNode* pPlanNode) {
     case QNODE_TABLESCAN:
       node = createTableScanNode(pCxt, pPlanNode);
       break;
-    case QNODE_PROJECT:
-//      node = create
     case QNODE_MODIFY:
       // Insert is not an operator in a physical plan.
       break;
diff --git a/source/libs/planner/src/planner.c b/source/libs/planner/src/planner.c
index de3454ddbbf4b063b7eb49c283950cd25fb9cb55..3047ef4f5ac5b8cf6eba9f3036aee44f55021d9e 100644
--- a/source/libs/planner/src/planner.c
+++ b/source/libs/planner/src/planner.c
@@ -56,7 +56,7 @@ void qDestroyQueryDag(struct SQueryDag* pDag) {
   tfree(pDag);
 }
 
-int32_t qCreateQueryDag(const struct SQueryNode* pNode, struct SQueryDag** pDag, SSchema** pSchema, uint32_t* numOfResCols, uint64_t requestId) {
+int32_t qCreateQueryDag(const struct SQueryNode* pNode, struct SQueryDag** pDag, uint64_t requestId) {
   SQueryPlanNode* pLogicPlan;
   int32_t code = createQueryPlan(pNode, &pLogicPlan);
   if (TSDB_CODE_SUCCESS != code) {
@@ -70,15 +70,6 @@ int32_t qCreateQueryDag(const struct SQueryNode* pNode, struct SQueryDag** pDag,
     printf("%s\n", str);
   }
 
-  int32_t numOfOutput = pLogicPlan->numOfExpr;
-  *pSchema = calloc(numOfOutput, sizeof(SSchema));
-  *numOfResCols = numOfOutput;
-
-  for(int32_t i = 0; i < numOfOutput; ++i) {
-    SExprInfo* pExprInfo = taosArrayGetP(pLogicPlan->pExpr, i);
-    memcpy(&(*pSchema)[i], pExprInfo->pExpr->pSchema, sizeof(SSchema));
-  }
-
   code = optimizeQueryPlan(pLogicPlan);
   if (TSDB_CODE_SUCCESS != code) {
     destroyQueryPlan(pLogicPlan);
diff --git a/source/libs/planner/test/phyPlanTests.cpp b/source/libs/planner/test/phyPlanTests.cpp
index 0d3820cc77f421717a34af326664cc7bd8db8aee..2733a73a3f0dc4f6384009a91956a567ecbee35d 100644
--- a/source/libs/planner/test/phyPlanTests.cpp
+++ b/source/libs/planner/test/phyPlanTests.cpp
@@ -65,7 +65,7 @@ protected:
     SSchema *schema = NULL;
     uint32_t numOfOutput = 0;
 
-    code = qCreateQueryDag(query, &dag, &schema, &numOfOutput, requestId);
+    code = qCreateQueryDag(query, &dag, requestId);
     dag_.reset(dag);
     return code;
   }
diff --git a/source/libs/scheduler/inc/schedulerInt.h b/source/libs/scheduler/inc/schedulerInt.h
index d127adbcfaadcbd6fbb614f556de33e1cf4ac716..c83eba4232952fa72984251b96f4e06fde57e523 100644
--- a/source/libs/scheduler/inc/schedulerInt.h
+++ b/source/libs/scheduler/inc/schedulerInt.h
@@ -58,7 +58,6 @@ typedef struct SSchLevel {
   SArray  *subTasks;  // Element is SQueryTask
 } SSchLevel;
 
-
 typedef struct SSchTask {
   uint64_t             taskId;         // task id
   SRWLatch             lock;           // task lock
diff --git a/source/libs/scheduler/src/scheduler.c b/source/libs/scheduler/src/scheduler.c
index cbd07f2a07cd68b69df04b90bd958ff4e1d4546e..9ce2e809516d8d21c1296da8bf22abdecd459fd2 100644
--- a/source/libs/scheduler/src/scheduler.c
+++ b/source/libs/scheduler/src/scheduler.c
@@ -773,8 +773,6 @@ int32_t schHandleResponseMsg(SSchJob *pJob, SSchTask *pTask, int32_t msgType, ch
         
         break;
       }
-      break;
-    }
     case TDMT_VND_RES_READY_RSP: {
         SResReadyRsp *rsp = (SResReadyRsp *)msg;
         
@@ -1198,7 +1196,7 @@ void schDropJobAllTasks(SSchJob *pJob) {
   schDropTaskInHashList(pJob, pJob->failTasks);
 }
 
-int32_t schExecJobImpl(void *transport, SArray *nodeList, SQueryDag* pDag, void** job, bool syncSchedule) {
+int32_t schExecJobImpl(void *transport, SArray *nodeList, SQueryDag* pDag, struct SSchJob** job, bool syncSchedule) {
   if (nodeList && taosArrayGetSize(nodeList) <= 0) {
     qInfo("QID:%"PRIx64" input nodeList is empty", pDag->queryId);
   }
@@ -1311,7 +1309,7 @@ int32_t schedulerInit(SSchedulerCfg *cfg) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t scheduleExecJob(void *transport, SArray *nodeList, SQueryDag* pDag, void** pJob, SQueryResult *pRes) {
+int32_t scheduleExecJob(void *transport, SArray *nodeList, SQueryDag* pDag, struct SSchJob** pJob, SQueryResult *pRes) {
   if (NULL == transport || NULL == pDag || NULL == pDag->pSubplans || NULL == pJob || NULL == pRes) {
     SCH_ERR_RET(TSDB_CODE_QRY_INVALID_INPUT);
   }
@@ -1328,7 +1326,7 @@ int32_t scheduleExecJob(void *transport, SArray *nodeList, SQueryDag* pDag, void
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t scheduleAsyncExecJob(void *transport, SArray *nodeList, SQueryDag* pDag, void** pJob) {
+int32_t scheduleAsyncExecJob(void *transport, SArray *nodeList, SQueryDag* pDag, struct SSchJob** pJob) {
   if (NULL == transport || NULL == pDag || NULL == pDag->pSubplans || NULL == pJob) {
     SCH_ERR_RET(TSDB_CODE_QRY_INVALID_INPUT);
   }
@@ -1343,12 +1341,10 @@ int32_t scheduleAsyncExecJob(void *transport, SArray *nodeList, SQueryDag* pDag,
 }
 
 
-int32_t scheduleFetchRows(void *job, void **data) {
-  if (NULL == job || NULL == data) {
+int32_t scheduleFetchRows(SSchJob *pJob, void** pData) {
+  if (NULL == pJob || NULL == pData) {
     SCH_ERR_RET(TSDB_CODE_QRY_INVALID_INPUT);
   }
-
-  SSchJob *pJob = job;
   int32_t code = 0;
 
   int8_t status = SCH_GET_JOB_STATUS(pJob);
@@ -1489,4 +1485,4 @@ void scheduleFreeJob(void *job) {
   
   void schedulerDestroy(void) {
     if (schMgmt.jobs) {
-      taosHashCleanup(sch
\ No newline at end of file
+      taosHashCleanup(sch