diff --git a/CMakeLists.txt b/CMakeLists.txt
index cda71fb3bf..99e48006b1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,7 @@ set(CMAKE_CONTRIB_DIR "${CMAKE_SOURCE_DIR}/contrib")
 include(${CMAKE_SUPPORT_DIR}/cmake.options)
 
 SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC -gdwarf-2 -msse4.2 -mfma -g3")
+SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -gdwarf-2 -msse4.2 -mfma -g3")
 
 # contrib
 add_subdirectory(contrib)
diff --git a/include/libs/catalog/catalog.h b/include/libs/catalog/catalog.h
index 60c688d95b..4d33706303 100644
--- a/include/libs/catalog/catalog.h
+++ b/include/libs/catalog/catalog.h
@@ -110,7 +110,7 @@ int32_t catalogRenewAndGetTableMeta(struct SCatalog* pCatalog, void *pRpc, const
  * @param pVgroupList (output, vgroup info list, element is SVgroupInfo, NEED to simply free the array by caller)
  * @return error code
  */
-int32_t catalogGetTableDistVgroup(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const char* pDBName, const char* pTableName, SArray* pVgroupList);
+int32_t catalogGetTableDistVgroup(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const char* pDBName, const char* pTableName, SArray** pVgroupList);
 
 /**
  * Get a table's vgroup from its name's hash value.
@@ -137,7 +137,7 @@ int32_t catalogGetTableHashVgroup(struct SCatalog* pCatalog, void * pTransporter
 int32_t catalogGetAllMeta(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const SCatalogReq* pReq, SMetaData* pRsp);
 
 
-int32_t catalogGetQnodeList(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, SEpSet* pQnodeEpSet);
+int32_t catalogGetQnodeList(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, SArray* pQnodeList);
 
 
 
diff --git a/include/libs/scheduler/scheduler.h b/include/libs/scheduler/scheduler.h
index 975b103538..fa1483de87 100644
--- a/include/libs/scheduler/scheduler.h
+++ b/include/libs/scheduler/scheduler.h
@@ -59,7 +59,15 @@ int32_t schedulerInit(SSchedulerCfg *cfg);
  * @param qnodeList  Qnode address list, element is SEpAddr
  * @return
  */
-int32_t scheduleExecJob(void *transport, SArray *qnodeList, SQueryDag* pDag, void** pJob);
+int32_t scheduleExecJob(void *transport, SArray *qnodeList, SQueryDag* pDag, void** pJob, uint64_t *numOfRows);
+
+/**
+ * Process the query job, generated according to the query physical plan.
+ * This is a asynchronized API, and is also thread-safety.
+ * @param qnodeList  Qnode address list, element is SEpAddr
+ * @return
+ */
+int32_t scheduleAsyncExecJob(void *transport, SArray *qnodeList, SQueryDag* pDag, void** pJob);
 
 int32_t scheduleFetchRows(void *pJob, void **data);
 
@@ -79,4 +87,4 @@ void schedulerDestroy(void);
 }
 #endif
 
-#endif /*_TD_SCHEDULER_H_*/
\ No newline at end of file
+#endif /*_TD_SCHEDULER_H_*/
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 00fe769299..c7ea3c2e09 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -209,7 +209,7 @@ int32_t execDdlQuery(SRequestObj* pRequest, SQueryNode* pQuery) {
 }
 
 int32_t scheduleQuery(SRequestObj* pRequest, SQueryDag* pDag, void** pJob) {
-  return scheduleExecJob(pRequest->pTscObj->pTransporter, NULL/*todo appInfo.xxx*/, pDag, pJob);
+  return scheduleAsyncExecJob(pRequest->pTscObj->pTransporter, NULL/*todo appInfo.xxx*/, pDag, pJob);
 }
 
 TAOS_RES *taos_query_l(TAOS *taos, const char *sql, int sqlLen) {
diff --git a/source/libs/catalog/src/catalog.c b/source/libs/catalog/src/catalog.c
index 7ca2822332..b882e1a42c 100644
--- a/source/libs/catalog/src/catalog.c
+++ b/source/libs/catalog/src/catalog.c
@@ -197,15 +197,21 @@ int32_t ctgGetHashFunction(int8_t hashMethod, tableNameHashFp *fp) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t ctgGetVgInfoFromDB(struct SCatalog *pCatalog, void *pRpc, const SEpSet *pMgmtEps, SDBVgroupInfo *dbInfo, SArray* vgroupList) {
+int32_t ctgGetVgInfoFromDB(struct SCatalog *pCatalog, void *pRpc, const SEpSet *pMgmtEps, SDBVgroupInfo *dbInfo, SArray** vgroupList) {
   SHashObj *vgroupHash = NULL;
   SVgroupInfo *vgInfo = NULL;
 
+  *vgroupList = taosArrayInit(taosHashGetSize(dbInfo->vgInfo), sizeof(SVgroupInfo));
+  if (NULL == *vgroupList) {
+    ctgError("taosArrayInit failed");
+    CTG_ERR_RET(TSDB_CODE_CTG_MEM_ERROR);    
+  }
+
   void *pIter = taosHashIterate(dbInfo->vgInfo, NULL);
   while (pIter) {
     vgInfo = pIter;
 
-    if (NULL == taosArrayPush(vgroupList, vgInfo)) {
+    if (NULL == taosArrayPush(*vgroupList, vgInfo)) {
       ctgError("taosArrayPush failed");
       CTG_ERR_RET(TSDB_CODE_CTG_MEM_ERROR);
     }
@@ -295,14 +301,6 @@ int32_t ctgUpdateTableMetaCache(struct SCatalog *pCatalog, STableMetaOutput *out
     CTG_ERR_RET(TSDB_CODE_CTG_INTERNAL_ERROR);
   }
 
-  if (NULL == pCatalog->tableCache.cache) {
-    pCatalog->tableCache.cache = taosHashInit(ctgMgmt.cfg.maxTblCacheNum, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_ENTRY_LOCK);
-    if (NULL == pCatalog->tableCache.cache) {
-      ctgError("init hash[%d] for tablemeta cache failed", ctgMgmt.cfg.maxTblCacheNum);
-      CTG_ERR_RET(TSDB_CODE_CTG_MEM_ERROR);
-    }
-  }
-
   if (NULL == pCatalog->tableCache.cache) {
     pCatalog->tableCache.cache = taosHashInit(ctgMgmt.cfg.maxTblCacheNum, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_ENTRY_LOCK);
     if (NULL == pCatalog->tableCache.cache) {
@@ -329,7 +327,8 @@ int32_t ctgUpdateTableMetaCache(struct SCatalog *pCatalog, STableMetaOutput *out
     }    
   }
 
-  if (taosHashPut(pCatalog->tableCache.cache, output->tbFname, strlen(output->tbFname), output->tbMeta, sizeof(*output->tbMeta)) != 0) {
+  int32_t tbSize = sizeof(*output->tbMeta) + sizeof(SSchema) * (output->tbMeta->tableInfo.numOfColumns + output->tbMeta->tableInfo.numOfTags);
+  if (taosHashPut(pCatalog->tableCache.cache, output->tbFname, strlen(output->tbFname), output->tbMeta, tbSize) != 0) {
     ctgError("push table[%s] to table cache failed", output->tbFname);
     goto error_exit;
   }
@@ -529,7 +528,7 @@ int32_t catalogRenewAndGetTableMeta(struct SCatalog* pCatalog, void *pRpc, const
   return ctgGetTableMetaImpl(pCatalog, pRpc, pMgmtEps, pDBName, pTableName, true, pTableMeta);
 }
 
-int32_t catalogGetTableDistVgroup(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const char* pDBName, const char* pTableName, SArray* pVgroupList) {
+int32_t catalogGetTableDistVgroup(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const char* pDBName, const char* pTableName, SArray** pVgroupList) {
   if (NULL == pCatalog || NULL == pRpc || NULL == pMgmtEps || NULL == pDBName || NULL == pTableName || NULL == pVgroupList) {
     CTG_ERR_RET(TSDB_CODE_CTG_INVALID_INPUT);
   }
@@ -549,17 +548,29 @@ int32_t catalogGetTableDistVgroup(struct SCatalog* pCatalog, void *pRpc, const S
     int32_t vgId = tbMeta->vgId;
     if (NULL == taosHashGetClone(dbVgroup.vgInfo, &vgId, sizeof(vgId), &vgroupInfo)) {
       ctgError("vgId[%d] not found in vgroup list", vgId);
-      CTG_ERR_RET(TSDB_CODE_CTG_INTERNAL_ERROR);    
+      CTG_ERR_JRET(TSDB_CODE_CTG_INTERNAL_ERROR);    
     }
 
-    if (NULL == taosArrayPush(pVgroupList, &vgroupInfo)) {
+    *pVgroupList = taosArrayInit(1, sizeof(SVgroupInfo));
+    if (NULL == *pVgroupList) {
+      ctgError("taosArrayInit failed");
+      CTG_ERR_JRET(TSDB_CODE_CTG_MEM_ERROR);    
+    }
+
+    if (NULL == taosArrayPush(*pVgroupList, &vgroupInfo)) {
       ctgError("push vgroupInfo to array failed");
       CTG_ERR_JRET(TSDB_CODE_CTG_INTERNAL_ERROR);
     }
   }
 
+  tfree(tbMeta);
+
+  return TSDB_CODE_SUCCESS;
+
 _return:
   tfree(tbMeta);
+
+  taosArrayDestroy(*pVgroupList);
   
   CTG_RET(code);
 }
@@ -634,8 +645,8 @@ _return:
   CTG_RET(code);
 }
 
-int32_t catalogGetQnodeList(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, SEpSet* pQnodeEpSet) {
-  if (NULL == pCatalog || NULL == pRpc  || NULL == pMgmtEps || NULL == pQnodeEpSet) {
+int32_t catalogGetQnodeList(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, SArray* pQnodeList) {
+  if (NULL == pCatalog || NULL == pRpc  || NULL == pMgmtEps || NULL == pQnodeList) {
     CTG_ERR_RET(TSDB_CODE_CTG_INVALID_INPUT);
   }
 
diff --git a/source/libs/catalog/test/catalogTests.cpp b/source/libs/catalog/test/catalogTests.cpp
index aa5a8e2b3e..62279b9e1f 100644
--- a/source/libs/catalog/test/catalogTests.cpp
+++ b/source/libs/catalog/test/catalogTests.cpp
@@ -32,27 +32,28 @@
 #include "stub.h"
 #include "addr_any.h"
 
-typedef struct SAppInstInfo {
-  int64_t           numOfConns;
-  SCorEpSet         mgmtEp;
-} SAppInstInfo;
 
-typedef struct STscObj {
-  char               user[TSDB_USER_LEN];
-  char               pass[TSDB_PASSWORD_LEN];
-  char               acctId[TSDB_ACCT_ID_LEN];
-  char               db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
-  uint32_t           connId;
-  uint64_t           id;       // ref ID returned by taosAddRef
-//  struct SSqlObj    *sqlList;
-  void              *pTransporter;
-  pthread_mutex_t    mutex;     // used to protect the operation on db
-  int32_t            numOfReqs; // number of sqlObj from this tscObj
-  SAppInstInfo      *pAppInfo;
-} STscObj;
 
 namespace {
 
+void ctgTestSetPrepareTableMeta();
+void ctgTestSetPrepareCTableMeta();
+void ctgTestSetPrepareSTableMeta();
+
+
+int32_t ctgTestVgNum = 10;
+int32_t ctgTestColNum = 2;
+int32_t ctgTestTagNum = 1;
+int32_t ctgTestSVersion = 1;
+int32_t ctgTestTVersion = 1;
+
+char *ctgTestClusterId = "cluster1";
+char *ctgTestDbname = "1.db1";
+char *ctgTestTablename = "table1";
+char *ctgTestCTablename = "ctable1";
+char *ctgTestSTablename = "stable1";
+
+
 void sendCreateDbMsg(void *shandle, SEpSet *pEpSet) {
   SCreateDbMsg* pReq = (SCreateDbMsg*)rpcMallocCont(sizeof(SCreateDbMsg));
   strcpy(pReq->db, "1.db1");
@@ -88,22 +89,281 @@ void sendCreateDbMsg(void *shandle, SEpSet *pEpSet) {
   ASSERT_EQ(rpcRsp.code, 0);
 }
 
-void __rpcSendRecv(void *shandle, SEpSet *pEpSet, SRpcMsg *pMsg, SRpcMsg *pRsp) {
+void ctgTestPrepareDbVgroups(void *shandle, SEpSet *pEpSet, SRpcMsg *pMsg, SRpcMsg *pRsp) {
   SUseDbRsp *rspMsg = NULL; //todo
 
+  pRsp->code =0;
+  pRsp->contLen = sizeof(SUseDbRsp) + ctgTestVgNum * sizeof(SVgroupInfo);
+  pRsp->pCont = calloc(1, pRsp->contLen);
+  rspMsg = (SUseDbRsp *)pRsp->pCont;
+  strcpy(rspMsg->db, ctgTestDbname);
+  rspMsg->vgVersion = htonl(1);
+  rspMsg->vgNum = htonl(ctgTestVgNum);
+  rspMsg->hashMethod = 0;
+
+  SVgroupInfo *vg = NULL;
+  uint32_t hashUnit = UINT32_MAX / ctgTestVgNum;
+  for (int32_t i = 0; i < ctgTestVgNum; ++i) {
+    vg = &rspMsg->vgroupInfo[i];
+
+    vg->vgId = htonl(i + 1);
+    vg->hashBegin = htonl(i * hashUnit);
+    vg->hashEnd = htonl(hashUnit * (i + 1) - 1);
+    vg->numOfEps = i % TSDB_MAX_REPLICA + 1;
+    vg->inUse = i % vg->numOfEps;
+    for (int32_t n = 0; n < vg->numOfEps; ++n) {
+      SEpAddrMsg *addr = &vg->epAddr[n];
+      strcpy(addr->fqdn, "a0");
+      addr->port = htons(n + 22);
+    }
+  }
+
+  vg->hashEnd = htonl(UINT32_MAX);
+
   return;
 }
 
 
-void initTestEnv() {
+
+
+void ctgTestPrepareTableMeta(void *shandle, SEpSet *pEpSet, SRpcMsg *pMsg, SRpcMsg *pRsp) {
+  STableMetaMsg *rspMsg = NULL; //todo
+
+  pRsp->code =0;
+  pRsp->contLen = sizeof(STableMetaMsg) + (ctgTestColNum + ctgTestTagNum) * sizeof(SSchema);
+  pRsp->pCont = calloc(1, pRsp->contLen);
+  rspMsg = (STableMetaMsg *)pRsp->pCont;
+  sprintf(rspMsg->tbFname, "%s.%s", ctgTestDbname, ctgTestTablename);
+  rspMsg->numOfTags = 0;
+  rspMsg->numOfColumns = htonl(ctgTestColNum);
+  rspMsg->precision = 1;
+  rspMsg->tableType = TSDB_NORMAL_TABLE;
+  rspMsg->update = 1;
+  rspMsg->sversion = htonl(ctgTestSVersion);
+  rspMsg->tversion = htonl(ctgTestTVersion);
+  rspMsg->suid = 0;
+  rspMsg->tuid = htobe64(0x0000000000000001);
+  rspMsg->vgId = htonl(8);
+
+  SSchema *s = NULL;
+  s = &rspMsg->pSchema[0];
+  s->type = TSDB_DATA_TYPE_TIMESTAMP;
+  s->colId = htonl(0);
+  s->bytes = htonl(8);
+  strcpy(s->name, "ts");
+
+  s = &rspMsg->pSchema[1];
+  s->type = TSDB_DATA_TYPE_INT;
+  s->colId = htonl(1);
+  s->bytes = htonl(4);
+  strcpy(s->name, "col1");
+  
+  return;
+}
+
+
+void ctgTestPrepareCTableMeta(void *shandle, SEpSet *pEpSet, SRpcMsg *pMsg, SRpcMsg *pRsp) {
+  STableMetaMsg *rspMsg = NULL; //todo
+
+  pRsp->code =0;
+  pRsp->contLen = sizeof(STableMetaMsg) + (ctgTestColNum + ctgTestTagNum) * sizeof(SSchema);
+  pRsp->pCont = calloc(1, pRsp->contLen);
+  rspMsg = (STableMetaMsg *)pRsp->pCont;
+  sprintf(rspMsg->tbFname, "%s.%s", ctgTestDbname, ctgTestCTablename);
+  sprintf(rspMsg->stbFname, "%s.%s", ctgTestDbname, ctgTestSTablename);
+  rspMsg->numOfTags = htonl(ctgTestTagNum);
+  rspMsg->numOfColumns = htonl(ctgTestColNum);
+  rspMsg->precision = 1;
+  rspMsg->tableType = TSDB_CHILD_TABLE;
+  rspMsg->update = 1;
+  rspMsg->sversion = htonl(ctgTestSVersion);
+  rspMsg->tversion = htonl(ctgTestTVersion);
+  rspMsg->suid = htobe64(0x0000000000000002);
+  rspMsg->tuid = htobe64(0x0000000000000003);
+  rspMsg->vgId = htonl(9);
+
+  SSchema *s = NULL;
+  s = &rspMsg->pSchema[0];
+  s->type = TSDB_DATA_TYPE_TIMESTAMP;
+  s->colId = htonl(0);
+  s->bytes = htonl(8);
+  strcpy(s->name, "ts");
+
+  s = &rspMsg->pSchema[1];
+  s->type = TSDB_DATA_TYPE_INT;
+  s->colId = htonl(1);
+  s->bytes = htonl(4);
+  strcpy(s->name, "col1s");
+
+  s = &rspMsg->pSchema[2];
+  s->type = TSDB_DATA_TYPE_BINARY;
+  s->colId = htonl(2);
+  s->bytes = htonl(12);
+  strcpy(s->name, "tag1s");
+
+  
+  return;
+}
+
+
+void ctgTestPrepareSTableMeta(void *shandle, SEpSet *pEpSet, SRpcMsg *pMsg, SRpcMsg *pRsp) {
+  STableMetaMsg *rspMsg = NULL; //todo
+
+  pRsp->code =0;
+  pRsp->contLen = sizeof(STableMetaMsg) + (ctgTestColNum + ctgTestTagNum) * sizeof(SSchema);
+  pRsp->pCont = calloc(1, pRsp->contLen);
+  rspMsg = (STableMetaMsg *)pRsp->pCont;
+  sprintf(rspMsg->tbFname, "%s.%s", ctgTestDbname, ctgTestSTablename);
+  sprintf(rspMsg->stbFname, "%s.%s", ctgTestDbname, ctgTestSTablename);
+  rspMsg->numOfTags = htonl(ctgTestTagNum);
+  rspMsg->numOfColumns = htonl(ctgTestColNum);
+  rspMsg->precision = 1;
+  rspMsg->tableType = TSDB_SUPER_TABLE;
+  rspMsg->update = 1;
+  rspMsg->sversion = htonl(ctgTestSVersion);
+  rspMsg->tversion = htonl(ctgTestTVersion);
+  rspMsg->suid = htobe64(0x0000000000000002);
+  rspMsg->tuid = htobe64(0x0000000000000003);
+  rspMsg->vgId = 0;
+
+  SSchema *s = NULL;
+  s = &rspMsg->pSchema[0];
+  s->type = TSDB_DATA_TYPE_TIMESTAMP;
+  s->colId = htonl(0);
+  s->bytes = htonl(8);
+  strcpy(s->name, "ts");
+
+  s = &rspMsg->pSchema[1];
+  s->type = TSDB_DATA_TYPE_INT;
+  s->colId = htonl(1);
+  s->bytes = htonl(4);
+  strcpy(s->name, "col1s");
+
+  s = &rspMsg->pSchema[2];
+  s->type = TSDB_DATA_TYPE_BINARY;
+  s->colId = htonl(2);
+  s->bytes = htonl(12);
+  strcpy(s->name, "tag1s");
+
+  
+  return;
+}
+
+void ctgTestPrepareDbVgroupsAndNormalMeta(void *shandle, SEpSet *pEpSet, SRpcMsg *pMsg, SRpcMsg *pRsp) {
+  ctgTestPrepareDbVgroups(shandle, pEpSet, pMsg, pRsp);
+  
+  ctgTestSetPrepareTableMeta();
+  
+  return;
+}
+
+
+void ctgTestPrepareDbVgroupsAndChildMeta(void *shandle, SEpSet *pEpSet, SRpcMsg *pMsg, SRpcMsg *pRsp) {
+  ctgTestPrepareDbVgroups(shandle, pEpSet, pMsg, pRsp);
+  
+  ctgTestSetPrepareCTableMeta();
+  
+  return;
+}
+
+void ctgTestPrepareDbVgroupsAndSuperMeta(void *shandle, SEpSet *pEpSet, SRpcMsg *pMsg, SRpcMsg *pRsp) {
+  ctgTestPrepareDbVgroups(shandle, pEpSet, pMsg, pRsp);
+  
+  ctgTestSetPrepareSTableMeta();
+  
+  return;
+}
+
+
+
+void ctgTestSetPrepareDbVgroups() {
   static Stub stub;
-  stub.set(rpcSendRecv, __rpcSendRecv);
+  stub.set(rpcSendRecv, ctgTestPrepareDbVgroups);
   {
     AddrAny any("libtransport.so");
     std::map<std::string,void*> result;
     any.get_global_func_addr_dynsym("^rpcSendRecv$", result);
     for (const auto& f : result) {
-      stub.set(f.second, __rpcSendRecv);
+      stub.set(f.second, ctgTestPrepareDbVgroups);
+    }
+  }
+}
+
+void ctgTestSetPrepareTableMeta() {
+  static Stub stub;
+  stub.set(rpcSendRecv, ctgTestPrepareTableMeta);
+  {
+    AddrAny any("libtransport.so");
+    std::map<std::string,void*> result;
+    any.get_global_func_addr_dynsym("^rpcSendRecv$", result);
+    for (const auto& f : result) {
+      stub.set(f.second, ctgTestPrepareTableMeta);
+    }
+  }
+}
+
+void ctgTestSetPrepareCTableMeta() {
+  static Stub stub;
+  stub.set(rpcSendRecv, ctgTestPrepareCTableMeta);
+  {
+    AddrAny any("libtransport.so");
+    std::map<std::string,void*> result;
+    any.get_global_func_addr_dynsym("^rpcSendRecv$", result);
+    for (const auto& f : result) {
+      stub.set(f.second, ctgTestPrepareCTableMeta);
+    }
+  }
+}
+
+void ctgTestSetPrepareSTableMeta() {
+  static Stub stub;
+  stub.set(rpcSendRecv, ctgTestPrepareSTableMeta);
+  {
+    AddrAny any("libtransport.so");
+    std::map<std::string,void*> result;
+    any.get_global_func_addr_dynsym("^rpcSendRecv$", result);
+    for (const auto& f : result) {
+      stub.set(f.second, ctgTestPrepareSTableMeta);
+    }
+  }
+}
+
+void ctgTestSetPrepareDbVgroupsAndNormalMeta() {
+  static Stub stub;
+  stub.set(rpcSendRecv, ctgTestPrepareDbVgroupsAndNormalMeta);
+  {
+    AddrAny any("libtransport.so");
+    std::map<std::string,void*> result;
+    any.get_global_func_addr_dynsym("^rpcSendRecv$", result);
+    for (const auto& f : result) {
+      stub.set(f.second, ctgTestPrepareDbVgroupsAndNormalMeta);
+    }
+  }
+}
+
+
+void ctgTestSetPrepareDbVgroupsAndChildMeta() {
+  static Stub stub;
+  stub.set(rpcSendRecv, ctgTestPrepareDbVgroupsAndChildMeta);
+  {
+    AddrAny any("libtransport.so");
+    std::map<std::string,void*> result;
+    any.get_global_func_addr_dynsym("^rpcSendRecv$", result);
+    for (const auto& f : result) {
+      stub.set(f.second, ctgTestPrepareDbVgroupsAndChildMeta);
+    }
+  }
+}
+
+void ctgTestSetPrepareDbVgroupsAndSuperMeta() {
+  static Stub stub;
+  stub.set(rpcSendRecv, ctgTestPrepareDbVgroupsAndSuperMeta);
+  {
+    AddrAny any("libtransport.so");
+    std::map<std::string,void*> result;
+    any.get_global_func_addr_dynsym("^rpcSendRecv$", result);
+    for (const auto& f : result) {
+      stub.set(f.second, ctgTestPrepareDbVgroupsAndSuperMeta);
     }
   }
 }
@@ -111,33 +371,267 @@ void initTestEnv() {
 
 }
 
-TEST(testCase, normalCase) {
-  STscObj* pConn = (STscObj *)taos_connect("127.0.0.1", "root", "taosdata", NULL, 0);
-  assert(pConn != NULL);
-
-  char *clusterId = "cluster1";
-  char *dbname = "1.db1";
-  char *tablename = "table1";
+TEST(tableMeta, normalTable) {
   struct SCatalog* pCtg = NULL;
   void *mockPointer = (void *)0x1;
   SVgroupInfo vgInfo = {0};
 
+  ctgTestSetPrepareDbVgroups();
+
   initQueryModuleMsgHandle();
 
-  sendCreateDbMsg(pConn->pTransporter, &pConn->pAppInfo->mgmtEp.epSet);
+  //sendCreateDbMsg(pConn->pTransporter, &pConn->pAppInfo->mgmtEp.epSet);
   
   int32_t code = catalogInit(NULL);
   ASSERT_EQ(code, 0);
 
-  code = catalogGetHandle(clusterId, &pCtg);
+  code = catalogGetHandle(ctgTestClusterId, &pCtg);
   ASSERT_EQ(code, 0);
 
-  code = catalogGetTableHashVgroup(pCtg, pConn->pTransporter, &pConn->pAppInfo->mgmtEp.epSet, dbname, tablename, &vgInfo);
+  code = catalogGetTableHashVgroup(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestTablename, &vgInfo);
   ASSERT_EQ(code, 0);
+  ASSERT_EQ(vgInfo.vgId, 8);
+  ASSERT_EQ(vgInfo.numOfEps, 3);
 
-  taos_close(pConn);
+  ctgTestSetPrepareTableMeta();
+
+  STableMeta *tableMeta = NULL;
+  code = catalogGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestTablename, &tableMeta);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(tableMeta->vgId, 8);
+  ASSERT_EQ(tableMeta->tableType, TSDB_NORMAL_TABLE);
+  ASSERT_EQ(tableMeta->sversion, ctgTestSVersion);
+  ASSERT_EQ(tableMeta->tversion, ctgTestTVersion);
+  ASSERT_EQ(tableMeta->tableInfo.numOfColumns, ctgTestColNum);
+  ASSERT_EQ(tableMeta->tableInfo.numOfTags, 0);
+  ASSERT_EQ(tableMeta->tableInfo.precision, 1);
+  ASSERT_EQ(tableMeta->tableInfo.rowSize, 12);
+
+  tableMeta = NULL;
+  code = catalogGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestTablename, &tableMeta);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(tableMeta->vgId, 8);
+  ASSERT_EQ(tableMeta->tableType, TSDB_NORMAL_TABLE);
+  ASSERT_EQ(tableMeta->sversion, ctgTestSVersion);
+  ASSERT_EQ(tableMeta->tversion, ctgTestTVersion);
+  ASSERT_EQ(tableMeta->tableInfo.numOfColumns, ctgTestColNum);
+  ASSERT_EQ(tableMeta->tableInfo.numOfTags, 0);
+  ASSERT_EQ(tableMeta->tableInfo.precision, 1);
+  ASSERT_EQ(tableMeta->tableInfo.rowSize, 12);
+
+  catalogDestroy();
 }
 
+TEST(tableMeta, childTableCase) {
+  struct SCatalog* pCtg = NULL;
+  void *mockPointer = (void *)0x1;
+  SVgroupInfo vgInfo = {0};
+
+  ctgTestSetPrepareDbVgroupsAndChildMeta();
+
+  initQueryModuleMsgHandle();
+
+  //sendCreateDbMsg(pConn->pTransporter, &pConn->pAppInfo->mgmtEp.epSet);
+  
+  int32_t code = catalogInit(NULL);
+  ASSERT_EQ(code, 0);
+
+  code = catalogGetHandle(ctgTestClusterId, &pCtg);
+  ASSERT_EQ(code, 0);
+
+  STableMeta *tableMeta = NULL;
+  code = catalogGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestCTablename, &tableMeta);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(tableMeta->vgId, 9);
+  ASSERT_EQ(tableMeta->tableType, TSDB_CHILD_TABLE);
+  ASSERT_EQ(tableMeta->sversion, ctgTestSVersion);
+  ASSERT_EQ(tableMeta->tversion, ctgTestTVersion);
+  ASSERT_EQ(tableMeta->tableInfo.numOfColumns, ctgTestColNum);
+  ASSERT_EQ(tableMeta->tableInfo.numOfTags, ctgTestTagNum);
+  ASSERT_EQ(tableMeta->tableInfo.precision, 1);
+  ASSERT_EQ(tableMeta->tableInfo.rowSize, 12);
+
+  tableMeta = NULL;
+  code = catalogGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestCTablename, &tableMeta);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(tableMeta->vgId, 9);
+  ASSERT_EQ(tableMeta->tableType, TSDB_CHILD_TABLE);
+  ASSERT_EQ(tableMeta->sversion, ctgTestSVersion);
+  ASSERT_EQ(tableMeta->tversion, ctgTestTVersion);
+  ASSERT_EQ(tableMeta->tableInfo.numOfColumns, ctgTestColNum);
+  ASSERT_EQ(tableMeta->tableInfo.numOfTags, ctgTestTagNum);
+  ASSERT_EQ(tableMeta->tableInfo.precision, 1);
+  ASSERT_EQ(tableMeta->tableInfo.rowSize, 12);
+
+  tableMeta = NULL;
+  code = catalogGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestSTablename, &tableMeta);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(tableMeta->vgId, 0);
+  ASSERT_EQ(tableMeta->tableType, TSDB_SUPER_TABLE);
+  ASSERT_EQ(tableMeta->sversion, ctgTestSVersion);
+  ASSERT_EQ(tableMeta->tversion, ctgTestTVersion);
+  ASSERT_EQ(tableMeta->tableInfo.numOfColumns, ctgTestColNum);
+  ASSERT_EQ(tableMeta->tableInfo.numOfTags, ctgTestTagNum);
+  ASSERT_EQ(tableMeta->tableInfo.precision, 1);
+  ASSERT_EQ(tableMeta->tableInfo.rowSize, 12);
+
+  catalogDestroy();
+}
+
+TEST(tableMeta, superTableCase) {
+  struct SCatalog* pCtg = NULL;
+  void *mockPointer = (void *)0x1;
+  SVgroupInfo vgInfo = {0};
+
+  ctgTestSetPrepareDbVgroupsAndSuperMeta();
+
+  initQueryModuleMsgHandle();
+
+  //sendCreateDbMsg(pConn->pTransporter, &pConn->pAppInfo->mgmtEp.epSet);
+  
+  int32_t code = catalogInit(NULL);
+  ASSERT_EQ(code, 0);
+
+  code = catalogGetHandle(ctgTestClusterId, &pCtg);
+  ASSERT_EQ(code, 0);
+
+  STableMeta *tableMeta = NULL;
+  code = catalogGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestSTablename, &tableMeta);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(tableMeta->vgId, 0);
+  ASSERT_EQ(tableMeta->tableType, TSDB_SUPER_TABLE);
+  ASSERT_EQ(tableMeta->sversion, ctgTestSVersion);
+  ASSERT_EQ(tableMeta->tversion, ctgTestTVersion);
+  ASSERT_EQ(tableMeta->tableInfo.numOfColumns, ctgTestColNum);
+  ASSERT_EQ(tableMeta->tableInfo.numOfTags, ctgTestTagNum);
+  ASSERT_EQ(tableMeta->tableInfo.precision, 1);
+  ASSERT_EQ(tableMeta->tableInfo.rowSize, 12);
+
+  ctgTestSetPrepareCTableMeta();
+
+  tableMeta = NULL;
+  code = catalogGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestCTablename, &tableMeta);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(tableMeta->vgId, 9);
+  ASSERT_EQ(tableMeta->tableType, TSDB_CHILD_TABLE);
+  ASSERT_EQ(tableMeta->sversion, ctgTestSVersion);
+  ASSERT_EQ(tableMeta->tversion, ctgTestTVersion);
+  ASSERT_EQ(tableMeta->tableInfo.numOfColumns, ctgTestColNum);
+  ASSERT_EQ(tableMeta->tableInfo.numOfTags, ctgTestTagNum);
+  ASSERT_EQ(tableMeta->tableInfo.precision, 1);
+  ASSERT_EQ(tableMeta->tableInfo.rowSize, 12);
+
+  tableMeta = NULL;
+  code = catalogRenewAndGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestCTablename, &tableMeta);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(tableMeta->vgId, 9);
+  ASSERT_EQ(tableMeta->tableType, TSDB_CHILD_TABLE);
+  ASSERT_EQ(tableMeta->sversion, ctgTestSVersion);
+  ASSERT_EQ(tableMeta->tversion, ctgTestTVersion);
+  ASSERT_EQ(tableMeta->tableInfo.numOfColumns, ctgTestColNum);
+  ASSERT_EQ(tableMeta->tableInfo.numOfTags, ctgTestTagNum);
+  ASSERT_EQ(tableMeta->tableInfo.precision, 1);
+  ASSERT_EQ(tableMeta->tableInfo.rowSize, 12);
+
+
+
+  catalogDestroy();
+}
+
+TEST(tableDistVgroup, normalTable) {
+  struct SCatalog* pCtg = NULL;
+  void *mockPointer = (void *)0x1;
+  SVgroupInfo *vgInfo = NULL;
+  SArray *vgList = NULL;
+
+  ctgTestSetPrepareDbVgroupsAndNormalMeta();
+
+  initQueryModuleMsgHandle();
+
+  //sendCreateDbMsg(pConn->pTransporter, &pConn->pAppInfo->mgmtEp.epSet);
+  
+  int32_t code = catalogInit(NULL);
+  ASSERT_EQ(code, 0);
+
+  code = catalogGetHandle(ctgTestClusterId, &pCtg);
+  ASSERT_EQ(code, 0);
+
+
+  code = catalogGetTableDistVgroup(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestTablename, &vgList);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(taosArrayGetSize((const SArray *)vgList), 1);
+  vgInfo = (SVgroupInfo *)taosArrayGet(vgList, 0);
+  ASSERT_EQ(vgInfo->vgId, 8);
+  ASSERT_EQ(vgInfo->numOfEps, 3);
+
+  catalogDestroy();
+}
+
+TEST(tableDistVgroup, childTableCase) {
+  struct SCatalog* pCtg = NULL;
+  void *mockPointer = (void *)0x1;
+  SVgroupInfo *vgInfo = NULL;
+  SArray *vgList = NULL;
+
+  ctgTestSetPrepareDbVgroupsAndChildMeta();
+
+  initQueryModuleMsgHandle();
+
+  //sendCreateDbMsg(pConn->pTransporter, &pConn->pAppInfo->mgmtEp.epSet);
+  
+  int32_t code = catalogInit(NULL);
+  ASSERT_EQ(code, 0);
+
+  code = catalogGetHandle(ctgTestClusterId, &pCtg);
+  ASSERT_EQ(code, 0);
+
+  code = catalogGetTableDistVgroup(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestCTablename, &vgList);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(taosArrayGetSize((const SArray *)vgList), 1);
+  vgInfo = (SVgroupInfo *)taosArrayGet(vgList, 0);
+  ASSERT_EQ(vgInfo->vgId, 9);
+  ASSERT_EQ(vgInfo->numOfEps, 4);
+
+
+  catalogDestroy();
+}
+
+TEST(tableDistVgroup, superTableCase) {
+  struct SCatalog* pCtg = NULL;
+  void *mockPointer = (void *)0x1;
+  SVgroupInfo *vgInfo = NULL;
+  SArray *vgList = NULL;
+
+  ctgTestSetPrepareDbVgroupsAndSuperMeta();
+
+  initQueryModuleMsgHandle();
+
+  //sendCreateDbMsg(pConn->pTransporter, &pConn->pAppInfo->mgmtEp.epSet);
+  
+  int32_t code = catalogInit(NULL);
+  ASSERT_EQ(code, 0);
+
+  code = catalogGetHandle(ctgTestClusterId, &pCtg);
+  ASSERT_EQ(code, 0);
+
+  code = catalogGetTableDistVgroup(pCtg, mockPointer, (const SEpSet *)mockPointer, ctgTestDbname, ctgTestSTablename, &vgList);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(taosArrayGetSize((const SArray *)vgList), 10);
+  vgInfo = (SVgroupInfo *)taosArrayGet(vgList, 0);
+  ASSERT_EQ(vgInfo->vgId, 1);
+  ASSERT_EQ(vgInfo->numOfEps, 1);
+  vgInfo = (SVgroupInfo *)taosArrayGet(vgList, 1);
+  ASSERT_EQ(vgInfo->vgId, 2);
+  ASSERT_EQ(vgInfo->numOfEps, 2);
+  vgInfo = (SVgroupInfo *)taosArrayGet(vgList, 2);
+  ASSERT_EQ(vgInfo->vgId, 3);
+  ASSERT_EQ(vgInfo->numOfEps, 3);
+
+
+  catalogDestroy();
+}
+
+
 
 int main(int argc, char** argv) {
   testing::InitGoogleTest(&argc, argv);
diff --git a/source/libs/qcom/src/querymsg.c b/source/libs/qcom/src/querymsg.c
index 9507b93222..34db262d5d 100644
--- a/source/libs/qcom/src/querymsg.c
+++ b/source/libs/qcom/src/querymsg.c
@@ -92,8 +92,8 @@ int32_t queryProcessUseDBRsp(void* output, char *msg, int32_t msgSize) {
     return TSDB_CODE_TSC_VALUE_OUT_OF_RANGE;
   }
   
-  pRsp->vgVersion = htonl(pRsp->vgVersion);
-  pRsp->vgNum = htonl(pRsp->vgNum);
+  pRsp->vgVersion = ntohl(pRsp->vgVersion);
+  pRsp->vgNum = ntohl(pRsp->vgNum);
 
   if (pRsp->vgNum < 0) {
     qError("invalid db[%s] vgroup number[%d]", pRsp->db, pRsp->vgNum);
@@ -115,12 +115,12 @@ int32_t queryProcessUseDBRsp(void* output, char *msg, int32_t msgSize) {
   }
 
   for (int32_t i = 0; i < pRsp->vgNum; ++i) {
-    pRsp->vgroupInfo[i].vgId = htonl(pRsp->vgroupInfo[i].vgId);
-    pRsp->vgroupInfo[i].hashBegin = htonl(pRsp->vgroupInfo[i].hashBegin);
-    pRsp->vgroupInfo[i].hashEnd = htonl(pRsp->vgroupInfo[i].hashEnd);
+    pRsp->vgroupInfo[i].vgId = ntohl(pRsp->vgroupInfo[i].vgId);
+    pRsp->vgroupInfo[i].hashBegin = ntohl(pRsp->vgroupInfo[i].hashBegin);
+    pRsp->vgroupInfo[i].hashEnd = ntohl(pRsp->vgroupInfo[i].hashEnd);
 
     for (int32_t n = 0; n < pRsp->vgroupInfo[i].numOfEps; ++n) {
-      pRsp->vgroupInfo[i].epAddr[n].port = htons(pRsp->vgroupInfo[i].epAddr[n].port);
+      pRsp->vgroupInfo[i].epAddr[n].port = ntohs(pRsp->vgroupInfo[i].epAddr[n].port);
     }
 
     if (0 != taosHashPut(pOut->dbVgroup.vgInfo, &pRsp->vgroupInfo[i].vgId, sizeof(pRsp->vgroupInfo[i].vgId), &pRsp->vgroupInfo[i], sizeof(pRsp->vgroupInfo[i]))) {
@@ -142,13 +142,13 @@ _return:
 }
 
 static int32_t queryConvertTableMetaMsg(STableMetaMsg* pMetaMsg) {
-  pMetaMsg->numOfTags = htonl(pMetaMsg->numOfTags);
-  pMetaMsg->numOfColumns = htonl(pMetaMsg->numOfColumns);
-  pMetaMsg->sversion = htonl(pMetaMsg->sversion);
-  pMetaMsg->tversion = htonl(pMetaMsg->tversion);
+  pMetaMsg->numOfTags = ntohl(pMetaMsg->numOfTags);
+  pMetaMsg->numOfColumns = ntohl(pMetaMsg->numOfColumns);
+  pMetaMsg->sversion = ntohl(pMetaMsg->sversion);
+  pMetaMsg->tversion = ntohl(pMetaMsg->tversion);
   pMetaMsg->tuid = htobe64(pMetaMsg->tuid);
   pMetaMsg->suid = htobe64(pMetaMsg->suid);
-  pMetaMsg->vgId = htonl(pMetaMsg->vgId);
+  pMetaMsg->vgId = ntohl(pMetaMsg->vgId);
 
   if (pMetaMsg->numOfTags < 0 || pMetaMsg->numOfTags > TSDB_MAX_TAGS) {
     qError("invalid numOfTags[%d] in table meta rsp msg", pMetaMsg->numOfTags);
@@ -179,8 +179,8 @@ static int32_t queryConvertTableMetaMsg(STableMetaMsg* pMetaMsg) {
 
   int32_t numOfTotalCols = pMetaMsg->numOfColumns + pMetaMsg->numOfTags;
   for (int i = 0; i < numOfTotalCols; ++i) {
-    pSchema->bytes = htonl(pSchema->bytes);
-    pSchema->colId = htonl(pSchema->colId);
+    pSchema->bytes = ntohl(pSchema->bytes);
+    pSchema->colId = ntohl(pSchema->colId);
 
     pSchema++;
   }
@@ -202,7 +202,8 @@ int32_t queryCreateTableMetaFromMsg(STableMetaMsg* msg, bool isSuperTable, STabl
     qError("calloc size[%d] failed", metaSize);
     return TSDB_CODE_TSC_OUT_OF_MEMORY;
   }
-  
+
+  pTableMeta->vgId = isSuperTable ? 0 : msg->vgId;
   pTableMeta->tableType = isSuperTable ? TSDB_SUPER_TABLE : msg->tableType;
   pTableMeta->uid = msg->suid;
   pTableMeta->suid = msg->suid;
@@ -213,12 +214,12 @@ int32_t queryCreateTableMetaFromMsg(STableMetaMsg* msg, bool isSuperTable, STabl
   pTableMeta->tableInfo.precision = msg->precision;
   pTableMeta->tableInfo.numOfColumns = msg->numOfColumns;
 
+  memcpy(pTableMeta->schema, msg->pSchema, sizeof(SSchema) * total);
+
   for(int32_t i = 0; i < msg->numOfColumns; ++i) {
     pTableMeta->tableInfo.rowSize += pTableMeta->schema[i].bytes;
   }
 
-  memcpy(pTableMeta->schema, msg->pSchema, sizeof(SSchema) * total);
-
   *pMeta = pTableMeta;
   
   return TSDB_CODE_SUCCESS;
diff --git a/source/libs/qworker/CMakeLists.txt b/source/libs/qworker/CMakeLists.txt
index 4eafa50bdc..001756d7c3 100644
--- a/source/libs/qworker/CMakeLists.txt
+++ b/source/libs/qworker/CMakeLists.txt
@@ -10,3 +10,5 @@ target_link_libraries(
    qworker
    PRIVATE os util transport planner qcom
 )
+
+ADD_SUBDIRECTORY(test)
\ No newline at end of file
diff --git a/source/libs/qworker/src/qworker.c b/source/libs/qworker/src/qworker.c
index 994b46c5c4..149f46273c 100644
--- a/source/libs/qworker/src/qworker.c
+++ b/source/libs/qworker/src/qworker.c
@@ -943,6 +943,11 @@ int32_t qWorkerProcessQueryMsg(void *node, void *qWorkerMgmt, SRpcMsg *pMsg) {
     qError("invalid query msg");
     QW_ERR_RET(TSDB_CODE_QRY_INVALID_INPUT);
   }
+
+  msg->schedulerId = htobe64(msg->schedulerId);
+  msg->queryId = htobe64(msg->queryId);
+  msg->taskId = htobe64(msg->taskId);
+  msg->contentLen = ntohl(msg->contentLen);
   
   bool queryDone = false;
   bool queryRsp = false;
diff --git a/source/libs/qworker/test/CMakeLists.txt b/source/libs/qworker/test/CMakeLists.txt
new file mode 100644
index 0000000000..6d755ad487
--- /dev/null
+++ b/source/libs/qworker/test/CMakeLists.txt
@@ -0,0 +1,18 @@
+
+MESSAGE(STATUS "build qworker unit test")
+
+# GoogleTest requires at least C++11
+SET(CMAKE_CXX_STANDARD 11)
+AUX_SOURCE_DIRECTORY(${CMAKE_CURRENT_SOURCE_DIR} SOURCE_LIST)
+
+ADD_EXECUTABLE(qworkerTest ${SOURCE_LIST})
+TARGET_LINK_LIBRARIES(
+        qworkerTest
+        PUBLIC os util common transport gtest qcom planner qworker
+)
+
+TARGET_INCLUDE_DIRECTORIES(
+        qworkerTest
+        PUBLIC "${CMAKE_SOURCE_DIR}/include/libs/qworker/"
+        PRIVATE "${CMAKE_SOURCE_DIR}/source/libs/qworker/inc"
+)
diff --git a/source/libs/qworker/test/qworkerTests.cpp b/source/libs/qworker/test/qworkerTests.cpp
new file mode 100644
index 0000000000..4b54b77544
--- /dev/null
+++ b/source/libs/qworker/test/qworkerTests.cpp
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <gtest/gtest.h>
+#include <tglobal.h>
+#include <iostream>
+#pragma GCC diagnostic ignored "-Wwrite-strings"
+
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+#pragma GCC diagnostic ignored "-Wsign-compare"
+#include "os.h"
+
+#include "taos.h"
+#include "tdef.h"
+#include "tvariant.h"
+#include "tep.h"
+#include "trpc.h"
+#include "planner.h"
+#include "qworker.h"
+#include "stub.h"
+#include "addr_any.h"
+
+
+namespace {
+
+int32_t qwtStringToPlan(const char* str, SSubplan** subplan) {
+  return 0;
+}
+
+
+void stubSetStringToPlan() {
+  static Stub stub;
+  stub.set(qStringToSubplan, qwtStringToPlan);
+  {
+    AddrAny any("libplanner.so");
+    std::map<std::string,void*> result;
+    any.get_global_func_addr_dynsym("^qStringToSubplan$", result);
+    for (const auto& f : result) {
+      stub.set(f.second, qwtStringToPlan);
+    }
+  }
+}
+
+
+}
+
+
+TEST(testCase, normalCase) {
+  void *mgmt = NULL;
+  int32_t code = 0;
+  void *mockPointer = (void *)0x1;
+  SRpcMsg queryRpc = {0};
+  SRpcMsg readyRpc = {0};
+  SRpcMsg fetchRpc = {0};
+  SRpcMsg dropRpc = {0};
+  SSubQueryMsg *queryMsg = (SSubQueryMsg *)calloc(1, sizeof(SSubQueryMsg) + 100);
+  queryMsg->queryId = htobe64(1);
+  queryMsg->schedulerId = htobe64(1);
+  queryMsg->taskId = htobe64(1);
+  queryMsg->contentLen = htonl(100);
+  queryRpc.pCont = queryMsg;
+
+  SResReadyMsg readyMsg = {0};
+  readyMsg.schedulerId = htobe64(1);
+  readyMsg.queryId = htobe64(1);
+  readyMsg.taskId = htobe64(1);
+  readyRpc.pCont = &readyMsg;
+
+  SResFetchMsg fetchMsg = {0};
+  fetchMsg.schedulerId = htobe64(1);
+  fetchMsg.queryId = htobe64(1);
+  fetchMsg.taskId = htobe64(1);
+  fetchRpc.pCont = &fetchMsg;
+
+  STaskDropMsg dropMsg = {0};  
+  dropMsg.schedulerId = htobe64(1);
+  dropMsg.queryId = htobe64(1);
+  dropMsg.taskId = htobe64(1);
+  dropRpc.pCont = &dropMsg;
+
+  stubSetStringToPlan();
+  
+  code = qWorkerInit(NULL, &mgmt);
+  ASSERT_EQ(code, 0);
+
+  code = qWorkerProcessQueryMsg(mockPointer, mgmt, &queryRpc);
+  ASSERT_EQ(code, 0);
+
+  code = qWorkerProcessReadyMsg(mockPointer, mgmt, &readyRpc);
+  ASSERT_EQ(code, 0);
+
+  code = qWorkerProcessFetchMsg(mockPointer, mgmt, &fetchRpc);
+  ASSERT_EQ(code, 0);
+
+  code = qWorkerProcessDropMsg(mockPointer, mgmt, &dropRpc);
+  ASSERT_EQ(code, 0);
+  
+}
+
+
+int main(int argc, char** argv) {
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
+
+
+
diff --git a/source/libs/scheduler/inc/schedulerInt.h b/source/libs/scheduler/inc/schedulerInt.h
index bc7bc44350..2381a1dd49 100644
--- a/source/libs/scheduler/inc/schedulerInt.h
+++ b/source/libs/scheduler/inc/schedulerInt.h
@@ -43,7 +43,7 @@ typedef struct SSchedulerMgmt {
   SHashObj *jobs;  // key: queryId, value: SQueryJob*
 } SSchedulerMgmt;
 
-typedef struct SQueryLevel {
+typedef struct SSchLevel {
   int32_t  level;
   int8_t   status;
   SRWLatch lock;
@@ -51,12 +51,12 @@ typedef struct SQueryLevel {
   int32_t  taskSucceed;
   int32_t  taskNum;
   SArray  *subTasks;  // Element is SQueryTask
-} SQueryLevel;
+} SSchLevel;
 
 
-typedef struct SQueryTask {
+typedef struct SSchTask {
   uint64_t             taskId;     // task id
-  SQueryLevel         *level;      // level
+  SSchLevel           *level;      // level
   SSubplan            *plan;       // subplan
   char                *msg;        // operator tree
   int32_t              msgLen;     // msg length
@@ -66,13 +66,20 @@ typedef struct SQueryTask {
   int32_t              childReady; // child task ready number
   SArray              *children;   // the datasource tasks,from which to fetch the result, element is SQueryTask*
   SArray              *parents;    // the data destination tasks, get data from current task, element is SQueryTask*
-} SQueryTask;
+} SSchTask;
 
-typedef struct SQueryJob {
+typedef struct SSchJobAttr {
+  bool needFetch;
+  bool syncSchedule;
+  bool queryJob;
+} SSchJobAttr;
+
+typedef struct SSchJob {
   uint64_t  queryId;
   int32_t   levelNum;
   int32_t   levelIdx;
   int8_t    status;
+  SSchJobAttr    attr;
   SQueryProfileSummary summary;
   SEpSet           dataSrcEps;
   SEpAddr          resEp;
@@ -81,15 +88,19 @@ typedef struct SQueryJob {
   tsem_t           rspSem;
   int32_t          userFetch;
   int32_t          remoteFetch;
-  void            *res;
 
+  SSchTask      *fetchTask;
+  int32_t          errCode;
+  void            *res;
+  int32_t          resNumOfRows;
+  
   SHashObj *execTasks; // executing tasks, key:taskid, value:SQueryTask*
   SHashObj *succTasks; // succeed tasks, key:taskid, value:SQueryTask*
   SHashObj *failTasks; // failed tasks, key:taskid, value:SQueryTask*
     
   SArray   *levels;    // Element is SQueryLevel, starting from 0.
   SArray   *subPlans;  // Element is SArray*, and nested element is SSubplan. The execution level of subplan, starting from 0.
-} SQueryJob;
+} SSchJob;
 
 #define SCH_HAS_QNODE_IN_CLUSTER(type) (false) //TODO CLUSTER TYPE
 #define SCH_TASK_READY_TO_LUNCH(task) ((task)->childReady >= taosArrayGetSize((task)->children))   // MAY NEED TO ENHANCE
@@ -108,7 +119,7 @@ typedef struct SQueryJob {
 #define SCH_UNLOCK(type, _lock) (SCH_READ == (type) ? taosRUnLockLatch(_lock) : taosWUnLockLatch(_lock))
 
 
-extern int32_t schLaunchTask(SQueryJob *job, SQueryTask *task);
+extern int32_t schLaunchTask(SSchJob *job, SSchTask *task);
 
 #ifdef __cplusplus
 }
diff --git a/source/libs/scheduler/src/scheduler.c b/source/libs/scheduler/src/scheduler.c
index 876a4ff4ae..503383f4b1 100644
--- a/source/libs/scheduler/src/scheduler.c
+++ b/source/libs/scheduler/src/scheduler.c
@@ -51,12 +51,12 @@ int32_t schBuildAndSendRequest(void *pRpc, const SEpSet* pMgmtEps, __taos_async_
 */  
 }
 
-int32_t schBuildTaskRalation(SQueryJob *job, SHashObj *planToTask) {
+int32_t schBuildTaskRalation(SSchJob *job, SHashObj *planToTask) {
   for (int32_t i = 0; i < job->levelNum; ++i) {
-    SQueryLevel *level = taosArrayGet(job->levels, i);
+    SSchLevel *level = taosArrayGet(job->levels, i);
     
     for (int32_t m = 0; m < level->taskNum; ++m) {
-      SQueryTask *task = taosArrayGet(level->subTasks, m);
+      SSchTask *task = taosArrayGet(level->subTasks, m);
       SSubplan *plan = task->plan;
       int32_t childNum = plan->pChildern ? (int32_t)taosArrayGetSize(plan->pChildern) : 0;
       int32_t parentNum = plan->pParents ? (int32_t)taosArrayGetSize(plan->pParents) : 0;
@@ -70,14 +70,14 @@ int32_t schBuildTaskRalation(SQueryJob *job, SHashObj *planToTask) {
       }
 
       for (int32_t n = 0; n < childNum; ++n) {
-        SSubplan *child = taosArrayGet(plan->pChildern, n);
-        SQueryTask *childTask = taosHashGet(planToTask, &child, POINTER_BYTES);
-        if (childTask) {
+        SSubplan **child = taosArrayGet(plan->pChildern, n);
+        SSchTask **childTask = taosHashGet(planToTask, child, POINTER_BYTES);
+        if (NULL == childTask || NULL == *childTask) {
           qError("subplan relationship error, level:%d, taskIdx:%d, childIdx:%d", i, m, n);
           SCH_ERR_RET(TSDB_CODE_SCH_INTERNAL_ERROR);
         }
 
-        if (NULL == taosArrayPush(task->children, &childTask)) {
+        if (NULL == taosArrayPush(task->children, childTask)) {
           qError("taosArrayPush failed");
           SCH_ERR_RET(TSDB_CODE_QRY_OUT_OF_MEMORY);
         }
@@ -92,14 +92,14 @@ int32_t schBuildTaskRalation(SQueryJob *job, SHashObj *planToTask) {
       }
 
       for (int32_t n = 0; n < parentNum; ++n) {
-        SSubplan *parent = taosArrayGet(plan->pParents, n);
-        SQueryTask *parentTask = taosHashGet(planToTask, &parent, POINTER_BYTES);
-        if (parentTask) {
+        SSubplan **parent = taosArrayGet(plan->pParents, n);
+        SSchTask **parentTask = taosHashGet(planToTask, parent, POINTER_BYTES);
+        if (NULL == parentTask || NULL == *parentTask) {
           qError("subplan relationship error, level:%d, taskIdx:%d, childIdx:%d", i, m, n);
           SCH_ERR_RET(TSDB_CODE_SCH_INTERNAL_ERROR);
         }
 
-        if (NULL == taosArrayPush(task->parents, &parentTask)) {
+        if (NULL == taosArrayPush(task->parents, parentTask)) {
           qError("taosArrayPush failed");
           SCH_ERR_RET(TSDB_CODE_QRY_OUT_OF_MEMORY);
         }
@@ -107,13 +107,13 @@ int32_t schBuildTaskRalation(SQueryJob *job, SHashObj *planToTask) {
     }
   }
 
-  SQueryLevel *level = taosArrayGet(job->levels, 0);
-  if (level->taskNum > 1) {
+  SSchLevel *level = taosArrayGet(job->levels, 0);
+  if (job->attr.queryJob && level->taskNum > 1) {
     qError("invalid plan info, level 0, taskNum:%d", level->taskNum);
     SCH_ERR_RET(TSDB_CODE_SCH_INTERNAL_ERROR);
   }
 
-  SQueryTask *task = taosArrayGet(level->subTasks, 0);
+  SSchTask *task = taosArrayGet(level->subTasks, 0);
   if (task->parents && taosArrayGetSize(task->parents) > 0) {
     qError("invalid plan info, level 0, parentNum:%d", (int32_t)taosArrayGetSize(task->parents));
     SCH_ERR_RET(TSDB_CODE_SCH_INTERNAL_ERROR);
@@ -124,7 +124,7 @@ int32_t schBuildTaskRalation(SQueryJob *job, SHashObj *planToTask) {
 }
 
 
-int32_t schValidateAndBuildJob(SQueryDag *dag, SQueryJob *job) {
+int32_t schValidateAndBuildJob(SQueryDag *dag, SSchJob *job) {
   int32_t code = 0;
 
   job->queryId = dag->queryId;
@@ -146,21 +146,23 @@ int32_t schValidateAndBuildJob(SQueryDag *dag, SQueryJob *job) {
     SCH_ERR_RET(TSDB_CODE_QRY_OUT_OF_MEMORY);
   }
   
-  job->levels = taosArrayInit(levelNum, sizeof(SQueryLevel));
+  job->levels = taosArrayInit(levelNum, sizeof(SSchLevel));
   if (NULL == job->levels) {
     qError("taosArrayInit %d failed", levelNum);
     SCH_ERR_JRET(TSDB_CODE_QRY_OUT_OF_MEMORY);
   }
 
+  job->attr.needFetch = true;
+  
   job->levelNum = levelNum;
   job->levelIdx = levelNum - 1;
 
   job->subPlans = dag->pSubplans;
 
-  SQueryLevel level = {0};
+  SSchLevel level = {0};
   SArray *levelPlans = NULL;
   int32_t levelPlanNum = 0;
-  SQueryLevel *pLevel = NULL;
+  SSchLevel *pLevel = NULL;
 
   level.status = JOB_TASK_STATUS_NOT_START;
 
@@ -187,7 +189,7 @@ int32_t schValidateAndBuildJob(SQueryDag *dag, SQueryJob *job) {
 
     pLevel->taskNum = levelPlanNum;
     
-    pLevel->subTasks = taosArrayInit(levelPlanNum, sizeof(SQueryTask));
+    pLevel->subTasks = taosArrayInit(levelPlanNum, sizeof(SSchTask));
     if (NULL == pLevel->subTasks) {
       qError("taosArrayInit %d failed", levelPlanNum);
       SCH_ERR_JRET(TSDB_CODE_QRY_OUT_OF_MEMORY);
@@ -195,7 +197,14 @@ int32_t schValidateAndBuildJob(SQueryDag *dag, SQueryJob *job) {
     
     for (int32_t n = 0; n < levelPlanNum; ++n) {
       SSubplan *plan = taosArrayGet(levelPlans, n);
-      SQueryTask task = {0};
+      SSchTask task = {0};
+
+      if (plan->type == QUERY_TYPE_MODIFY) {
+        job->attr.needFetch = false;
+      } else {
+        job->attr.queryJob = true;
+      }
+
       
       task.taskId = atomic_add_fetch_64(&schMgmt.taskId, 1);
       task.plan = plan;
@@ -236,7 +245,7 @@ _return:
   SCH_RET(code);
 }
 
-int32_t schSetTaskExecEpSet(SQueryJob *job, SEpSet *epSet) {  
+int32_t schSetTaskExecEpSet(SSchJob *job, SEpSet *epSet) {  
   if (epSet->numOfEps >= SCH_MAX_CONDIDATE_EP_NUM) {
     return TSDB_CODE_SUCCESS;
   }
@@ -263,7 +272,7 @@ int32_t schSetTaskExecEpSet(SQueryJob *job, SEpSet *epSet) {
 }
 
 
-int32_t schPushTaskToExecList(SQueryJob *job, SQueryTask *task) {
+int32_t schPushTaskToExecList(SSchJob *job, SSchTask *task) {
   if (0 != taosHashPut(job->execTasks, &task->taskId, sizeof(task->taskId), &task, POINTER_BYTES)) {
     qError("taosHashPut failed");
     SCH_ERR_RET(TSDB_CODE_QRY_OUT_OF_MEMORY);
@@ -272,7 +281,7 @@ int32_t schPushTaskToExecList(SQueryJob *job, SQueryTask *task) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t schMoveTaskToSuccList(SQueryJob *job, SQueryTask *task, bool *moved) {
+int32_t schMoveTaskToSuccList(SSchJob *job, SSchTask *task, bool *moved) {
   if (0 != taosHashRemove(job->execTasks, &task->taskId, sizeof(task->taskId))) {
     qWarn("remove task[%"PRIx64"] from execTasks failed", task->taskId);
     return TSDB_CODE_SUCCESS;
@@ -288,10 +297,9 @@ int32_t schMoveTaskToSuccList(SQueryJob *job, SQueryTask *task, bool *moved) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t schMoveTaskToFailList(SQueryJob *job, SQueryTask *task, bool *moved) {
+int32_t schMoveTaskToFailList(SSchJob *job, SSchTask *task, bool *moved) {
   if (0 != taosHashRemove(job->execTasks, &task->taskId, sizeof(task->taskId))) {
-    qWarn("remove task[%"PRIx64"] from execTasks failed", task->taskId);
-    return TSDB_CODE_SUCCESS;
+    qWarn("remove task[%"PRIx64"] from execTasks failed, it may not exist", task->taskId);
   }
 
   if (0 != taosHashPut(job->failTasks, &task->taskId, sizeof(task->taskId), &task, POINTER_BYTES)) {
@@ -305,7 +313,7 @@ int32_t schMoveTaskToFailList(SQueryJob *job, SQueryTask *task, bool *moved) {
 }
 
 
-int32_t schAsyncSendMsg(SQueryJob *job, SQueryTask *task, int32_t msgType) {
+int32_t schAsyncSendMsg(SSchJob *job, SSchTask *task, int32_t msgType) {
   int32_t msgSize = 0;
   void *msg = NULL;
   
@@ -357,6 +365,9 @@ int32_t schAsyncSendMsg(SQueryJob *job, SQueryTask *task, int32_t msgType) {
       break;
     }
     case TDMT_VND_FETCH: {
+      if (NULL == task) {
+        SCH_ERR_RET(TSDB_CODE_QRY_APP_ERROR);
+      }
       msgSize = sizeof(SResFetchMsg);
       msg = calloc(1, msgSize);
       if (NULL == msg) {
@@ -395,7 +406,7 @@ int32_t schAsyncSendMsg(SQueryJob *job, SQueryTask *task, int32_t msgType) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t schTaskCheckAndSetRetry(SQueryJob *job, SQueryTask *task, int32_t errCode, bool *needRetry) {
+int32_t schTaskCheckAndSetRetry(SSchJob *job, SSchTask *task, int32_t errCode, bool *needRetry) {
   // TODO set retry or not based on task type/errCode/retry times/job status/available eps...
   // TODO if needRetry, set task retry info
 
@@ -405,7 +416,7 @@ int32_t schTaskCheckAndSetRetry(SQueryJob *job, SQueryTask *task, int32_t errCod
 }
 
 
-int32_t schFetchFromRemote(SQueryJob *job) {
+int32_t schFetchFromRemote(SSchJob *job) {
   int32_t code = 0;
   
   if (atomic_val_compare_exchange_32(&job->remoteFetch, 0, 1) != 0) {
@@ -413,7 +424,7 @@ int32_t schFetchFromRemote(SQueryJob *job) {
     return TSDB_CODE_SUCCESS;
   }
 
-  SCH_ERR_JRET(schAsyncSendMsg(job, NULL, TDMT_VND_FETCH));
+  SCH_ERR_JRET(schAsyncSendMsg(job, job->fetchTask, TDMT_VND_FETCH));
 
   return TSDB_CODE_SUCCESS;
   
@@ -424,8 +435,12 @@ _return:
 }
 
 
-int32_t schProcessOnJobSuccess(SQueryJob *job) {
-  job->status = JOB_TASK_STATUS_SUCCEED;
+int32_t schProcessOnJobPartialSuccess(SSchJob *job) {
+  job->status = JOB_TASK_STATUS_PARTIAL_SUCCEED;
+
+  if ((!job->attr.needFetch) && job->attr.syncSchedule) {
+    tsem_post(&job->rspSem);
+  }
   
   if (job->userFetch) {
     SCH_ERR_RET(schFetchFromRemote(job));
@@ -434,26 +449,27 @@ int32_t schProcessOnJobSuccess(SQueryJob *job) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t schProcessOnJobFailure(SQueryJob *job) {
+int32_t schProcessOnJobFailure(SSchJob *job, int32_t errCode) {
   job->status = JOB_TASK_STATUS_FAILED;
+  job->errCode = errCode;
 
   atomic_val_compare_exchange_32(&job->remoteFetch, 1, 0);
 
-  if (job->userFetch) {
+  if (job->userFetch || ((!job->attr.needFetch) && job->attr.syncSchedule)) {
     tsem_post(&job->rspSem);
   }
 
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t schProcessOnDataFetched(SQueryJob *job) {
+int32_t schProcessOnDataFetched(SSchJob *job) {
   atomic_val_compare_exchange_32(&job->remoteFetch, 1, 0);
 
   tsem_post(&job->rspSem);
 }
 
 
-int32_t schProcessOnTaskSuccess(SQueryJob *job, SQueryTask *task) {
+int32_t schProcessOnTaskSuccess(SSchJob *job, SSchTask *task) {
   bool moved = false;
   
   SCH_ERR_RET(schMoveTaskToSuccList(job, task, &moved));
@@ -464,7 +480,7 @@ int32_t schProcessOnTaskSuccess(SQueryJob *job, SQueryTask *task) {
 
   task->status = JOB_TASK_STATUS_SUCCEED;
   
-  int32_t parentNum = (int32_t)taosArrayGetSize(task->parents);
+  int32_t parentNum = task->parents ? (int32_t)taosArrayGetSize(task->parents) : 0;
   if (parentNum == 0) {
     if (task->plan->level != 0) {
       qError("level error");
@@ -475,7 +491,7 @@ int32_t schProcessOnTaskSuccess(SQueryJob *job, SQueryTask *task) {
     
     if (SCH_TASK_NEED_WAIT_ALL(task)) {
       SCH_LOCK(SCH_WRITE, &task->level->lock);
-      task->level->taskFailed++;
+      task->level->taskSucceed++;
       taskDone = task->level->taskSucceed + task->level->taskFailed;
       SCH_UNLOCK(SCH_WRITE, &task->level->lock);
       
@@ -486,7 +502,7 @@ int32_t schProcessOnTaskSuccess(SQueryJob *job, SQueryTask *task) {
 
       if (task->level->taskFailed > 0) {
         job->status = JOB_TASK_STATUS_FAILED;
-        SCH_ERR_RET(schProcessOnJobFailure(job));
+        SCH_ERR_RET(schProcessOnJobFailure(job, TSDB_CODE_QRY_APP_ERROR));
 
         return TSDB_CODE_SUCCESS;
       }
@@ -495,7 +511,9 @@ int32_t schProcessOnTaskSuccess(SQueryJob *job, SQueryTask *task) {
       job->resEp.port = task->execAddr.port;
     }
 
-    SCH_ERR_RET(schProcessOnJobSuccess(job));
+    job->fetchTask = task;
+    
+    SCH_ERR_RET(schProcessOnJobPartialSuccess(job));
 
     return TSDB_CODE_SUCCESS;
   }
@@ -508,21 +526,21 @@ int32_t schProcessOnTaskSuccess(SQueryJob *job, SQueryTask *task) {
   }
 
   for (int32_t i = 0; i < parentNum; ++i) {
-    SQueryTask *par = taosArrayGet(task->parents, i);
+    SSchTask *par = *(SSchTask **)taosArrayGet(task->parents, i);
 
     ++par->childReady;
 
     SCH_ERR_RET(qSetSubplanExecutionNode(par->plan, task->plan->id.templateId, &task->execAddr));
     
     if (SCH_TASK_READY_TO_LUNCH(par)) {
-      SCH_ERR_RET(schLaunchTask(job, task));
+      SCH_ERR_RET(schLaunchTask(job, par));
     }
   }
 
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t schProcessOnTaskFailure(SQueryJob *job, SQueryTask *task, int32_t errCode) {
+int32_t schProcessOnTaskFailure(SSchJob *job, SSchTask *task, int32_t errCode) {
   bool needRetry = false;
   bool moved = false;
   int32_t taskDone = 0;
@@ -534,7 +552,6 @@ int32_t schProcessOnTaskFailure(SQueryJob *job, SQueryTask *task, int32_t errCod
     SCH_ERR_RET(schMoveTaskToFailList(job, task, &moved));
     if (!moved) {
       SCH_TASK_ERR_LOG("task may already moved, status:%d", task->status);
-      return TSDB_CODE_SUCCESS;
     }    
     
     if (SCH_TASK_NEED_WAIT_ALL(task)) {
@@ -550,7 +567,7 @@ int32_t schProcessOnTaskFailure(SQueryJob *job, SQueryTask *task, int32_t errCod
     }
     
     job->status = JOB_TASK_STATUS_FAILED;
-    SCH_ERR_RET(schProcessOnJobFailure(job));
+    SCH_ERR_RET(schProcessOnJobFailure(job, errCode));
 
     return TSDB_CODE_SUCCESS;
   }
@@ -560,34 +577,60 @@ int32_t schProcessOnTaskFailure(SQueryJob *job, SQueryTask *task, int32_t errCod
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t schHandleRspMsg(SQueryJob *job, SQueryTask *task, int32_t msgType, int32_t rspCode) {
+int32_t schHandleRspMsg(SSchJob *job, SSchTask *task, int32_t msgType, char *msg, int32_t msgSize, int32_t rspCode) {
   int32_t code = 0;
   
   switch (msgType) {
-    case TDMT_VND_QUERY:
-      if (rspCode != TSDB_CODE_SUCCESS) {
-        SCH_ERR_JRET(schProcessOnTaskFailure(job, task, rspCode));
-      } else {
-        code = schAsyncSendMsg(job, task, TDMT_VND_RES_READY);
-        if (code) {
-          goto _task_error;
+    case TDMT_VND_SUBMIT: {
+        SShellSubmitRspMsg *rsp = (SShellSubmitRspMsg *)msg;
+        if (rsp->code != TSDB_CODE_SUCCESS) {
+          SCH_ERR_JRET(schProcessOnTaskFailure(job, task, rsp->code));
+        } else {
+          job->resNumOfRows += rsp->affectedRows;
+          
+          code = schProcessOnTaskSuccess(job, task);
+          if (code) {
+            goto _task_error;
+          }               
         }
+        break;
       }
-      break;
-    case TDMT_VND_RES_READY:
-      if (rspCode != TSDB_CODE_SUCCESS) {
-        SCH_ERR_JRET(schProcessOnTaskFailure(job, task, rspCode));
-      } else {
-        code = schProcessOnTaskSuccess(job, task);
-        if (code) {
-          goto _task_error;
-        }        
+    case TDMT_VND_QUERY: {
+        SQueryTableRsp *rsp = (SQueryTableRsp *)msg;
+        
+        if (rsp->code != TSDB_CODE_SUCCESS) {
+          SCH_ERR_JRET(schProcessOnTaskFailure(job, task, rsp->code));
+        } else {
+          code = schAsyncSendMsg(job, task, TDMT_VND_RES_READY);
+          if (code) {
+            goto _task_error;
+          }
+        }
+        break;
+      }
+    case TDMT_VND_RES_READY: {
+        SResReadyRsp *rsp = (SResReadyRsp *)msg;
+        
+        if (rsp->code != TSDB_CODE_SUCCESS) {
+          SCH_ERR_JRET(schProcessOnTaskFailure(job, task, rsp->code));
+        } else {
+          code = schProcessOnTaskSuccess(job, task);
+          if (code) {
+            goto _task_error;
+          }        
+        }
+        break;
+      }
+    case TDMT_VND_FETCH: {
+        SCH_ERR_JRET(rspCode);
+        SRetrieveTableRsp *rsp = (SRetrieveTableRsp *)msg;
+
+        job->res = rsp;
+        job->resNumOfRows = rsp->numOfRows;
+        
+        SCH_ERR_JRET(schProcessOnDataFetched(job));
+        break;
       }
-      break;
-    case TDMT_VND_FETCH:
-      SCH_ERR_JRET(rspCode);
-      SCH_ERR_JRET(schProcessOnDataFetched(job));
-      break;
     default:
       qError("unknown msg type:%d received", msgType);
       return TSDB_CODE_QRY_INVALID_INPUT;
@@ -600,14 +643,14 @@ _task_error:
   return TSDB_CODE_SUCCESS;
 
 _return:
-  code = schProcessOnJobFailure(job);
+  code = schProcessOnJobFailure(job, code);
   return code;
 }
 
 
 
 
-int32_t schLaunchTask(SQueryJob *job, SQueryTask *task) {
+int32_t schLaunchTask(SSchJob *job, SSchTask *task) {
   SSubplan *plan = task->plan;
   SCH_ERR_RET(qSubPlanToString(plan, &task->msg, &task->msgLen));
   if (plan->execEpSet.numOfEps <= 0) {
@@ -630,10 +673,10 @@ int32_t schLaunchTask(SQueryJob *job, SQueryTask *task) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t schLaunchJob(SQueryJob *job) {
-  SQueryLevel *level = taosArrayGet(job->levels, job->levelIdx);
+int32_t schLaunchJob(SSchJob *job) {
+  SSchLevel *level = taosArrayGet(job->levels, job->levelIdx);
   for (int32_t i = 0; i < level->taskNum; ++i) {
-    SQueryTask *task = taosArrayGet(level->subTasks, i);
+    SSchTask *task = taosArrayGet(level->subTasks, i);
     SCH_ERR_RET(schLaunchTask(job, task));
   }
 
@@ -642,10 +685,10 @@ int32_t schLaunchJob(SQueryJob *job) {
   return TSDB_CODE_SUCCESS;
 }
 
-void schDropJobAllTasks(SQueryJob *job) {
+void schDropJobAllTasks(SSchJob *job) {
   void *pIter = taosHashIterate(job->succTasks, NULL);
   while (pIter) {
-    SQueryTask *task = *(SQueryTask **)pIter;
+    SSchTask *task = *(SSchTask **)pIter;
   
     schAsyncSendMsg(job, task, TDMT_VND_DROP_TASK);
     
@@ -654,7 +697,7 @@ void schDropJobAllTasks(SQueryJob *job) {
 
   pIter = taosHashIterate(job->failTasks, NULL);
   while (pIter) {
-    SQueryTask *task = *(SQueryTask **)pIter;
+    SSchTask *task = *(SSchTask **)pIter;
   
     schAsyncSendMsg(job, task, TDMT_VND_DROP_TASK);
     
@@ -680,7 +723,7 @@ int32_t schedulerInit(SSchedulerCfg *cfg) {
 }
 
 
-int32_t scheduleExecJob(void *transport, SArray *qnodeList, SQueryDag* pDag, void** pJob) {
+int32_t scheduleExecJobImpl(void *transport, SArray *qnodeList, SQueryDag* pDag, void** pJob, bool syncSchedule) {
   if (NULL == transport || NULL == transport ||NULL == pDag || NULL == pDag->pSubplans || NULL == pJob) {
     SCH_ERR_RET(TSDB_CODE_QRY_INVALID_INPUT);
   }
@@ -690,11 +733,12 @@ int32_t scheduleExecJob(void *transport, SArray *qnodeList, SQueryDag* pDag, voi
   }
 
   int32_t code = 0;
-  SQueryJob *job = calloc(1, sizeof(SQueryJob));
+  SSchJob *job = calloc(1, sizeof(SSchJob));
   if (NULL == job) {
     SCH_ERR_RET(TSDB_CODE_QRY_OUT_OF_MEMORY);
   }
 
+  job->attr.syncSchedule = syncSchedule;
   job->transport = transport;
   job->qnodeList = qnodeList;
 
@@ -719,54 +763,104 @@ int32_t scheduleExecJob(void *transport, SArray *qnodeList, SQueryDag* pDag, voi
   }
 
   tsem_init(&job->rspSem, 0, 0);
-  
-  if (0 != taosHashPut(schMgmt.jobs, &job->queryId, sizeof(job->queryId), &job, POINTER_BYTES)) {
-    qError("taosHashPut queryId:%"PRIx64" failed", job->queryId);
-    SCH_ERR_JRET(TSDB_CODE_SCH_INTERNAL_ERROR);
+
+  code = taosHashPut(schMgmt.jobs, &job->queryId, sizeof(job->queryId), &job, POINTER_BYTES);
+  if (0 != code) {
+    if (HASH_NODE_EXIST(code)) {
+      qError("taosHashPut queryId:%"PRIx64" already exist", job->queryId);
+      SCH_ERR_JRET(TSDB_CODE_QRY_INVALID_INPUT);
+    } else {
+      qError("taosHashPut queryId:%"PRIx64" failed", job->queryId);
+      SCH_ERR_JRET(TSDB_CODE_SCH_INTERNAL_ERROR);
+    }
   }
 
   job->status = JOB_TASK_STATUS_NOT_START;
   
   SCH_ERR_JRET(schLaunchJob(job));
 
-  *(SQueryJob **)pJob = job;
+  *(SSchJob **)pJob = job;
+
+  if (syncSchedule) {
+    tsem_wait(&job->rspSem);
+  }
 
   return TSDB_CODE_SUCCESS;
 
 _return:
 
-  *(SQueryJob **)pJob = NULL;
+  *(SSchJob **)pJob = NULL;
   scheduleFreeJob(job);
   
   SCH_RET(code);
 }
 
+int32_t scheduleExecJob(void *transport, SArray *qnodeList, SQueryDag* pDag, void** pJob, uint64_t *numOfRows) {
+  *numOfRows = 0;
+  
+  SCH_ERR_RET(scheduleExecJobImpl(transport, qnodeList, pDag, pJob, true));
+
+  SSchJob *job = *(SSchJob **)pJob;
+  
+  *numOfRows = job->resNumOfRows;
+
+  return TSDB_CODE_SUCCESS;
+}
+
+int32_t scheduleAsyncExecJob(void *transport, SArray *qnodeList, SQueryDag* pDag, void** pJob) {
+  return scheduleExecJobImpl(transport, qnodeList, pDag, pJob, false);
+}
+
+
 int32_t scheduleFetchRows(void *pJob, void **data) {
   if (NULL == pJob || NULL == data) {
-    return TSDB_CODE_QRY_INVALID_INPUT;
+    SCH_ERR_RET(TSDB_CODE_QRY_INVALID_INPUT);
   }
 
-  SQueryJob *job = pJob;
+  SSchJob *job = pJob;
   int32_t code = 0;
 
-  if (atomic_val_compare_exchange_32(&job->userFetch, 0, 1) != 0) {
-    qError("prior fetching not finished");
-    return TSDB_CODE_QRY_APP_ERROR;
+  if (!job->attr.needFetch) {
+    qError("no need to fetch data");
+    SCH_ERR_RET(TSDB_CODE_QRY_APP_ERROR);
+  }
+
+  if (job->status == JOB_TASK_STATUS_FAILED) {
+    job->res = NULL;
+    SCH_RET(job->errCode);
   }
 
   if (job->status == JOB_TASK_STATUS_SUCCEED) {
+    job->res = NULL;
+    return TSDB_CODE_SUCCESS;
+  }
+
+  if (atomic_val_compare_exchange_32(&job->userFetch, 0, 1) != 0) {
+    qError("prior fetching not finished");
+    SCH_ERR_RET(TSDB_CODE_QRY_APP_ERROR);
+  }
+
+  if (job->status == JOB_TASK_STATUS_PARTIAL_SUCCEED) {
     SCH_ERR_JRET(schFetchFromRemote(job));
   }
 
   tsem_wait(&job->rspSem);
 
+  if (job->status == JOB_TASK_STATUS_FAILED) {
+    code = job->errCode;
+  }
+  
+  if (job->res && ((SRetrieveTableRsp *)job->res)->completed) {
+    job->status = JOB_TASK_STATUS_SUCCEED;
+  }
+
   *data = job->res;
   job->res = NULL;
 
 _return:
   atomic_val_compare_exchange_32(&job->userFetch, 1, 0);
 
-  return code;
+  SCH_RET(code);
 }
 
 int32_t scheduleCancelJob(void *pJob) {
@@ -782,7 +876,7 @@ void scheduleFreeJob(void *pJob) {
     return;
   }
 
-  SQueryJob *job = pJob;
+  SSchJob *job = pJob;
 
   if (job->status > 0) {
     if (0 != taosHashRemove(schMgmt.jobs, &job->queryId, sizeof(job->queryId))) {
diff --git a/source/libs/scheduler/test/schedulerTests.cpp b/source/libs/scheduler/test/schedulerTests.cpp
index 9e94553058..4732429d0b 100644
--- a/source/libs/scheduler/test/schedulerTests.cpp
+++ b/source/libs/scheduler/test/schedulerTests.cpp
@@ -26,72 +26,310 @@
 #include "taos.h"
 #include "tdef.h"
 #include "tvariant.h"
-#include "catalog.h"
-#include "scheduler.h"
+#include "catalog.h"
+#include "scheduler.h"
 #include "tep.h"
 #include "trpc.h"
-
+#include "schedulerInt.h"
+#include "stub.h"
+#include "addr_any.h"
+
 namespace {
-void mockBuildDag(SQueryDag *dag) {
-  uint64_t qId = 0x111111111111;
-  
-  dag->queryId = qId;
-  dag->numOfSubplans = 2;
-  dag->pSubplans = taosArrayInit(dag->numOfSubplans, POINTER_BYTES);
-  SArray *scan = taosArrayInit(1, sizeof(SSubplan));
-  SArray *merge = taosArrayInit(1, sizeof(SSubplan));
-  
-  SSubplan scanPlan = {0};
-  SSubplan mergePlan = {0};
-
-  scanPlan.id.queryId = qId;
-  scanPlan.id.templateId = 0x2222222222;
-  scanPlan.id.subplanId = 0x3333333333;
-  scanPlan.type = QUERY_TYPE_SCAN;
-  scanPlan.level = 1;
-  scanPlan.execEpSet.numOfEps = 1;
-  scanPlan.pChildern = NULL;
-  scanPlan.pParents = taosArrayInit(1, POINTER_BYTES);
-
-  mergePlan.id.queryId = qId;
-  mergePlan.id.templateId = 0x4444444444;
-  mergePlan.id.subplanId = 0x5555555555;
-  mergePlan.type = QUERY_TYPE_MERGE;
-  mergePlan.level = 0;
-  mergePlan.execEpSet.numOfEps = 1;
-  mergePlan.pChildern = taosArrayInit(1, POINTER_BYTES);
-  mergePlan.pParents = NULL;
-
-  SSubplan *mergePointer = (SSubplan *)taosArrayPush(merge, &mergePlan);
-  SSubplan *scanPointer = (SSubplan *)taosArrayPush(scan, &scanPlan);
-
-  taosArrayPush(mergePointer->pChildern, &scanPointer);
-  taosArrayPush(scanPointer->pParents, &mergePointer);
-
-  taosArrayPush(dag->pSubplans, &merge);  
-  taosArrayPush(dag->pSubplans, &scan);
-}
-
+
+extern "C" int32_t schHandleRspMsg(SSchJob *job, SSchTask *task, int32_t msgType, char *msg, int32_t msgSize, int32_t rspCode);
+
+void schtBuildQueryDag(SQueryDag *dag) {
+  uint64_t qId = 0x0000000000000001;
+  
+  dag->queryId = qId;
+  dag->numOfSubplans = 2;
+  dag->pSubplans = taosArrayInit(dag->numOfSubplans, POINTER_BYTES);
+  SArray *scan = taosArrayInit(1, sizeof(SSubplan));
+  SArray *merge = taosArrayInit(1, sizeof(SSubplan));
+  
+  SSubplan scanPlan = {0};
+  SSubplan mergePlan = {0};
+
+  scanPlan.id.queryId = qId;
+  scanPlan.id.templateId = 0x0000000000000002;
+  scanPlan.id.subplanId = 0x0000000000000003;
+  scanPlan.type = QUERY_TYPE_SCAN;
+  scanPlan.level = 1;
+  scanPlan.execEpSet.numOfEps = 1;
+  scanPlan.execEpSet.port[0] = 6030;
+  strcpy(scanPlan.execEpSet.fqdn[0], "ep0");
+  scanPlan.pChildern = NULL;
+  scanPlan.pParents = taosArrayInit(1, POINTER_BYTES);
+  scanPlan.pNode = (SPhyNode*)calloc(1, sizeof(SPhyNode));
+
+  mergePlan.id.queryId = qId;
+  mergePlan.id.templateId = 0x4444444444;
+  mergePlan.id.subplanId = 0x5555555555;
+  mergePlan.type = QUERY_TYPE_MERGE;
+  mergePlan.level = 0;
+  mergePlan.execEpSet.numOfEps = 0;
+  mergePlan.pChildern = taosArrayInit(1, POINTER_BYTES);
+  mergePlan.pParents = NULL;
+  mergePlan.pNode = (SPhyNode*)calloc(1, sizeof(SPhyNode));
+
+  SSubplan *mergePointer = (SSubplan *)taosArrayPush(merge, &mergePlan);
+  SSubplan *scanPointer = (SSubplan *)taosArrayPush(scan, &scanPlan);
+
+  taosArrayPush(mergePointer->pChildern, &scanPointer);
+  taosArrayPush(scanPointer->pParents, &mergePointer);
+
+  taosArrayPush(dag->pSubplans, &merge);  
+  taosArrayPush(dag->pSubplans, &scan);
 }
 
-TEST(testCase, normalCase) {
-  void *mockPointer = (void *)0x1;
+void schtBuildInsertDag(SQueryDag *dag) {
+  uint64_t qId = 0x0000000000000002;
+  
+  dag->queryId = qId;
+  dag->numOfSubplans = 2;
+  dag->pSubplans = taosArrayInit(1, POINTER_BYTES);
+  SArray *inserta = taosArrayInit(dag->numOfSubplans, sizeof(SSubplan));
+  
+  SSubplan insertPlan[2] = {0};
+
+  insertPlan[0].id.queryId = qId;
+  insertPlan[0].id.templateId = 0x0000000000000003;
+  insertPlan[0].id.subplanId = 0x0000000000000004;
+  insertPlan[0].type = QUERY_TYPE_MODIFY;
+  insertPlan[0].level = 0;
+  insertPlan[0].execEpSet.numOfEps = 1;
+  insertPlan[0].execEpSet.port[0] = 6030;
+  strcpy(insertPlan[0].execEpSet.fqdn[0], "ep0");
+  insertPlan[0].pChildern = NULL;
+  insertPlan[0].pParents = NULL;
+  insertPlan[0].pNode = NULL;
+  insertPlan[0].pDataSink = (SDataSink*)calloc(1, sizeof(SDataSink));
+
+  insertPlan[1].id.queryId = qId;
+  insertPlan[1].id.templateId = 0x0000000000000003;
+  insertPlan[1].id.subplanId = 0x0000000000000005;
+  insertPlan[1].type = QUERY_TYPE_MODIFY;
+  insertPlan[1].level = 0;
+  insertPlan[1].execEpSet.numOfEps = 1;
+  insertPlan[1].execEpSet.port[0] = 6030;
+  strcpy(insertPlan[1].execEpSet.fqdn[0], "ep1");
+  insertPlan[1].pChildern = NULL;
+  insertPlan[1].pParents = NULL;
+  insertPlan[1].pNode = NULL;
+  insertPlan[1].pDataSink = (SDataSink*)calloc(1, sizeof(SDataSink));
+
+
+  taosArrayPush(inserta, &insertPlan[0]);
+  taosArrayPush(inserta, &insertPlan[1]);
+
+  taosArrayPush(dag->pSubplans, &inserta);  
+}
+
+
+int32_t schtPlanToString(const SSubplan *subplan, char** str, int32_t* len) {
+  *str = (char *)calloc(1, 20);
+  *len = 20;
+  return 0;
+}
+
+int32_t schtExecNode(SSubplan* subplan, uint64_t templateId, SEpAddr* ep) {
+  return 0;
+}
+
+
+void schtSetPlanToString() {
+  static Stub stub;
+  stub.set(qSubPlanToString, schtPlanToString);
+  {
+    AddrAny any("libplanner.so");
+    std::map<std::string,void*> result;
+    any.get_global_func_addr_dynsym("^qSubPlanToString$", result);
+    for (const auto& f : result) {
+      stub.set(f.second, schtPlanToString);
+    }
+  }
+}
+
+void schtSetExecNode() {
+  static Stub stub;
+  stub.set(qSetSubplanExecutionNode, schtExecNode);
+  {
+    AddrAny any("libplanner.so");
+    std::map<std::string,void*> result;
+    any.get_global_func_addr_dynsym("^qSetSubplanExecutionNode$", result);
+    for (const auto& f : result) {
+      stub.set(f.second, schtExecNode);
+    }
+  }
+}
+
+void *schtSendRsp(void *param) {
+  SSchJob *job = NULL;
+  int32_t code = 0;
+
+  while (true) {
+    job = *(SSchJob **)param;
+    if (job) {
+      break;
+    }
+
+    usleep(1000);
+  }
+  
+  void *pIter = taosHashIterate(job->execTasks, NULL);
+  while (pIter) {
+    SSchTask *task = *(SSchTask **)pIter;
+
+    SShellSubmitRspMsg rsp = {0};
+    rsp.affectedRows = 10;
+    schHandleRspMsg(job, task, TDMT_VND_SUBMIT, (char *)&rsp, sizeof(rsp), 0);
+    
+    pIter = taosHashIterate(job->execTasks, pIter);
+  }    
+
+  return NULL;
+}
+
+void *pInsertJob = NULL;
+
+
+}
+
+TEST(queryTest, normalCase) {
+  void *mockPointer = (void *)0x1;
   char *clusterId = "cluster1";
   char *dbname = "1.db1";
   char *tablename = "table1";
-  SVgroupInfo vgInfo = {0};
-  void *pJob = NULL;
-  SQueryDag dag = {0};
-  SArray *qnodeList = taosArrayInit(1, sizeof(SEpAddr));
-  
-  int32_t code = schedulerInit(NULL);
+  SVgroupInfo vgInfo = {0};
+  void *pJob = NULL;
+  SQueryDag dag = {0};
+  SArray *qnodeList = taosArrayInit(1, sizeof(SEpAddr));
+
+  SEpAddr qnodeAddr = {0};
+  strcpy(qnodeAddr.fqdn, "qnode0.ep");
+  qnodeAddr.port = 6031;
+  taosArrayPush(qnodeList, &qnodeAddr);
+  
+  int32_t code = schedulerInit(NULL);
   ASSERT_EQ(code, 0);
-
-  mockBuildDag(&dag);
-  
-  code = scheduleExecJob(mockPointer, qnodeList, &dag, &pJob);
+
+  schtBuildQueryDag(&dag);
+
+  schtSetPlanToString();
+  schtSetExecNode();
+  
+  code = scheduleAsyncExecJob(mockPointer, qnodeList, &dag, &pJob);
   ASSERT_EQ(code, 0);
-}
+
+  SSchJob *job = (SSchJob *)pJob;
+  void *pIter = taosHashIterate(job->execTasks, NULL);
+  while (pIter) {
+    SSchTask *task = *(SSchTask **)pIter;
+
+    SQueryTableRsp rsp = {0};
+    code = schHandleRspMsg(job, task, TDMT_VND_QUERY, (char *)&rsp, sizeof(rsp), 0);
+    
+    ASSERT_EQ(code, 0);
+    pIter = taosHashIterate(job->execTasks, pIter);
+  }    
+
+  pIter = taosHashIterate(job->execTasks, NULL);
+  while (pIter) {
+    SSchTask *task = *(SSchTask **)pIter;
+
+    SResReadyRsp rsp = {0};
+    code = schHandleRspMsg(job, task, TDMT_VND_RES_READY, (char *)&rsp, sizeof(rsp), 0);
+    
+    ASSERT_EQ(code, 0);
+    pIter = taosHashIterate(job->execTasks, pIter);
+  }  
+
+  pIter = taosHashIterate(job->execTasks, NULL);
+  while (pIter) {
+    SSchTask *task = *(SSchTask **)pIter;
+
+    SQueryTableRsp rsp = {0};
+    code = schHandleRspMsg(job, task, TDMT_VND_QUERY, (char *)&rsp, sizeof(rsp), 0);
+    
+    ASSERT_EQ(code, 0);
+    pIter = taosHashIterate(job->execTasks, pIter);
+  }    
+
+  pIter = taosHashIterate(job->execTasks, NULL);
+  while (pIter) {
+    SSchTask *task = *(SSchTask **)pIter;
+
+    SResReadyRsp rsp = {0};
+    code = schHandleRspMsg(job, task, TDMT_VND_RES_READY, (char *)&rsp, sizeof(rsp), 0);
+    ASSERT_EQ(code, 0);
+    
+    pIter = taosHashIterate(job->execTasks, pIter);
+  }  
+
+  SRetrieveTableRsp rsp = {0};
+  rsp.completed = 1;
+  rsp.numOfRows = 10;
+  code = schHandleRspMsg(job, NULL, TDMT_VND_FETCH, (char *)&rsp, sizeof(rsp), 0);
+    
+  ASSERT_EQ(code, 0);
+
+
+  void *data = NULL;
+  
+  code = scheduleFetchRows(job, &data);
+  ASSERT_EQ(code, 0);
+
+  SRetrieveTableRsp *pRsp = (SRetrieveTableRsp *)data;
+  ASSERT_EQ(pRsp->completed, 1);
+  ASSERT_EQ(pRsp->numOfRows, 10);
+
+  data = NULL;
+  code = scheduleFetchRows(job, &data);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(data, (void*)NULL);
+
+  scheduleFreeJob(pJob);
+}
+
+
+
+
+TEST(insertTest, normalCase) {
+  void *mockPointer = (void *)0x1;
+  char *clusterId = "cluster1";
+  char *dbname = "1.db1";
+  char *tablename = "table1";
+  SVgroupInfo vgInfo = {0};
+  SQueryDag dag = {0};
+  uint64_t numOfRows = 0;
+  SArray *qnodeList = taosArrayInit(1, sizeof(SEpAddr));
+
+  SEpAddr qnodeAddr = {0};
+  strcpy(qnodeAddr.fqdn, "qnode0.ep");
+  qnodeAddr.port = 6031;
+  taosArrayPush(qnodeList, &qnodeAddr);
+  
+  int32_t code = schedulerInit(NULL);
+  ASSERT_EQ(code, 0);
+
+  schtBuildInsertDag(&dag);
+
+  schtSetPlanToString();
+
+  pthread_attr_t thattr;
+  pthread_attr_init(&thattr);
+
+  pthread_t thread1;
+  pthread_create(&(thread1), &thattr, schtSendRsp, &pInsertJob);
+  
+  code = scheduleExecJob(mockPointer, qnodeList, &dag, &pInsertJob, &numOfRows);
+  ASSERT_EQ(code, 0);
+  ASSERT_EQ(numOfRows, 20);
+
+  scheduleFreeJob(pInsertJob);
+}
+
+
 
 
 int main(int argc, char** argv) {
@@ -101,4 +339,4 @@ int main(int argc, char** argv) {
 
 
 
-
+