diff --git a/source/client/inc/clientInt.h b/source/client/inc/clientInt.h
index 9a029b0fea..0630704d93 100644
--- a/source/client/inc/clientInt.h
+++ b/source/client/inc/clientInt.h
@@ -45,7 +45,7 @@ extern "C" {
 
 #define ERROR_MSG_BUF_DEFAULT_SIZE 512
 #define HEARTBEAT_INTERVAL         1500  // ms
-#define SYNC_ON_TOP_OF_ASYNC       1
+#define SYNC_ON_TOP_OF_ASYNC       0
 
 enum {
   RES_TYPE__QUERY = 1,
@@ -266,8 +266,8 @@ extern SAppInfo appInfo;
 extern int32_t  clientReqRefPool;
 extern int32_t  clientConnRefPool;
 
-extern int (*handleRequestRspFp[TDMT_MAX])(void*, const SDataBuf* pMsg, int32_t code);
-int           genericRspCallback(void* param, const SDataBuf* pMsg, int32_t code);
+__async_send_cb_fn_t getMsgRspHandle(int32_t msgType);
+
 SMsgSendInfo* buildMsgInfoImpl(SRequestObj* pReqObj);
 
 void*    createTscObj(const char* user, const char* auth, const char* db, int32_t connType, SAppInstInfo* pAppInfo);
@@ -293,8 +293,6 @@ void* openTransporter(const char* user, const char* auth, int32_t numOfThreads);
 bool persistConnForSpecificMsg(void* parenct, tmsg_t msgType);
 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, int connType);
 
diff --git a/source/client/src/clientEnv.c b/source/client/src/clientEnv.c
index c210a7ed39..75e1884360 100644
--- a/source/client/src/clientEnv.c
+++ b/source/client/src/clientEnv.c
@@ -278,7 +278,6 @@ void taos_init_imp(void) {
     return;
   }
 
-  initMsgHandleFp();
   initQueryModuleMsgHandle();
 
   rpcInit();
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 85f6e85190..c71c7d3487 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -535,19 +535,20 @@ int32_t handleAlterTbExecRes(void* res, SCatalog* pCatalog) {
   return catalogUpdateTableMeta(pCatalog, (STableMetaRsp*)res);
 }
 
-int32_t handleExecRes(SRequestObj* pRequest) {
+int32_t handleQueryExecRsp(SRequestObj* pRequest) {
   if (NULL == pRequest->body.resInfo.execRes.res) {
     return TSDB_CODE_SUCCESS;
   }
 
-  int32_t code = 0;
   SCatalog* pCatalog = NULL;
-  code = catalogGetHandle(pRequest->pTscObj->pAppInfo->clusterId, &pCatalog);
+  SAppInstInfo*   pAppInfo = getAppInfo(pRequest);
+
+  int32_t code = catalogGetHandle(pAppInfo->clusterId, &pCatalog);
   if (code) {
     return code;
   }
 
-  SEpSet epset = getEpSet_s(&pRequest->pTscObj->pAppInfo->mgmtEp);
+  SEpSet epset = getEpSet_s(&pAppInfo->mgmtEp);
   SQueryExecRes* pRes = &pRequest->body.resInfo.execRes;
 
   switch (pRes->msgType) {
@@ -565,8 +566,9 @@ int32_t handleExecRes(SRequestObj* pRequest) {
       break;
     }
     default:
-      tscError("invalid exec result for request type %d", pRequest->type);
-      return TSDB_CODE_APP_ERROR;
+      tscError("0x%"PRIx64", invalid exec result for request type %d, reqId:0x%"PRIx64, pRequest->self,
+          pRequest->type, pRequest->requestId);
+      code = TSDB_CODE_APP_ERROR;
   }
 
   return code;
@@ -578,13 +580,18 @@ void schedulerExecCb(SQueryResult* pResult, void* param, int32_t code) {
 
   STscObj* pTscObj = pRequest->pTscObj;
   if (code != TSDB_CODE_SUCCESS && NEED_CLIENT_HANDLE_ERROR(code)) {
-    // todo do nothing in clear value in request
     tscDebug("0x%"PRIx64" client retry to handle the error, code:%s, reqId:0x%"PRIx64, pRequest->self, tstrerror(code), pRequest->requestId);
     pRequest->prevCode = code;
     doAsyncQuery(pRequest, true);
     return;
   }
 
+  if (code == TSDB_CODE_SUCCESS) {
+    code = handleQueryExecRsp(pRequest);
+    ASSERT(pRequest->code ==  TSDB_CODE_SUCCESS);
+    pRequest->code = code;
+  }
+
   if (NEED_CLIENT_RM_TBLMETA_REQ(pRequest->type)) {
     removeMeta(pTscObj, pRequest->tableList);
   }
@@ -623,7 +630,7 @@ SRequestObj* launchQueryImpl(SRequestObj* pRequest, SQuery* pQuery, bool keepQue
     qDestroyQuery(pQuery);
   }
 
-  handleExecRes(pRequest);
+  handleQueryExecRsp(pRequest);
 
   if (NULL != pRequest && TSDB_CODE_SUCCESS != code) {
     pRequest->code = terrno;
@@ -688,9 +695,6 @@ void launchAsyncQuery(SRequestObj* pRequest, SQuery* pQuery) {
       if (TSDB_CODE_SUCCESS == code) {
         schedulerAsyncExecJob(pAppInfo->pTransporter, pNodeList, pRequest->body.pDag, &pRequest->body.queryJob,
                               pRequest->sqlstr, pRequest->metric.start, schedulerExecCb, pRequest);
-        //        if (NULL != pRes) {
-        //          code = validateSversion(pRequest, pRes);
-        //        }
       }
 
       //todo not to be released here
@@ -884,7 +888,7 @@ static SMsgSendInfo* buildConnectMsg(SRequestObj* pRequest) {
 
   pMsgSendInfo->requestObjRefId = pRequest->self;
   pMsgSendInfo->requestId = pRequest->requestId;
-  pMsgSendInfo->fp = handleRequestRspFp[TMSG_INDEX(pMsgSendInfo->msgType)];
+  pMsgSendInfo->fp = getMsgRspHandle(pMsgSendInfo->msgType);
   pMsgSendInfo->param = pRequest;
 
   SConnectReq connectReq = {0};
diff --git a/source/client/src/clientMain.c b/source/client/src/clientMain.c
index a15f9f17f7..d192b65bf0 100644
--- a/source/client/src/clientMain.c
+++ b/source/client/src/clientMain.c
@@ -634,7 +634,7 @@ void retrieveMetaCallback(SMetaData* pResultMeta, void* param, int32_t code) {
 
     // return to app directly
     taosMemoryFree(pWrapper);
-    tscError("0x%" PRIx64 " error occurs, code:%s, return to user app, reqId:%" PRIx64, pRequest->self, tstrerror(code),
+    tscError("0x%" PRIx64 " error occurs, code:%s, return to user app, reqId:0x%" PRIx64, pRequest->self, tstrerror(code),
              pRequest->requestId);
     pRequest->code = code;
     pRequest->body.queryFp(pRequest->body.param, pRequest, code);
@@ -748,7 +748,6 @@ void doAsyncQuery(SRequestObj* pRequest, bool updateMetaForce) {
   pRequest->body.queryFp(pRequest->body.param, pRequest, code);
 }
 
-
 static void fetchCallback(void* pResult, void* param, int32_t code) {
   SRequestObj* pRequest = (SRequestObj*) param;
 
diff --git a/source/client/src/clientMsgHandler.c b/source/client/src/clientMsgHandler.c
index cdac217084..14e2798d3b 100644
--- a/source/client/src/clientMsgHandler.c
+++ b/source/client/src/clientMsgHandler.c
@@ -21,8 +21,6 @@
 #include "tdef.h"
 #include "tname.h"
 
-int32_t (*handleRequestRspFp[TDMT_MAX])(void*, const SDataBuf* pMsg, int32_t code);
-
 static void setErrno(SRequestObj* pRequest, int32_t code) {
   pRequest->code = code;
   terrno = code;
@@ -107,10 +105,7 @@ SMsgSendInfo* buildMsgInfoImpl(SRequestObj* pRequest) {
 
   assert(pRequest != NULL);
   pMsgSendInfo->msgInfo = pRequest->body.requestMsg;
-
-  pMsgSendInfo->fp = (handleRequestRspFp[TMSG_INDEX(pRequest->type)] == NULL)
-                         ? genericRspCallback
-                         : handleRequestRspFp[TMSG_INDEX(pRequest->type)];
+  pMsgSendInfo->fp = getMsgRspHandle(pRequest->type);
   return pMsgSendInfo;
 }
 
@@ -209,7 +204,7 @@ int32_t processUseDbRsp(void* param, const SDataBuf* pMsg, int32_t code) {
   return 0;
 }
 
-int32_t processCreateTableRsp(void* param, const SDataBuf* pMsg, int32_t code) {
+int32_t processCreateSTableRsp(void* param, const SDataBuf* pMsg, int32_t code) {
   assert(pMsg != NULL && param != NULL);
   SRequestObj* pRequest = param;
 
@@ -285,13 +280,21 @@ int32_t processAlterStbRsp(void* param, const SDataBuf* pMsg, int32_t code) {
   return code;
 }
 
-
-// todo refactor: this arraylist is too large
-void initMsgHandleFp() {
-  handleRequestRspFp[TMSG_INDEX(TDMT_MND_CONNECT)] = processConnectRsp;
-  handleRequestRspFp[TMSG_INDEX(TDMT_MND_CREATE_DB)] = processCreateDbRsp;
-  handleRequestRspFp[TMSG_INDEX(TDMT_MND_USE_DB)] = processUseDbRsp;
-  handleRequestRspFp[TMSG_INDEX(TDMT_MND_CREATE_STB)] = processCreateTableRsp;
-  handleRequestRspFp[TMSG_INDEX(TDMT_MND_DROP_DB)] = processDropDbRsp;
-  handleRequestRspFp[TMSG_INDEX(TDMT_MND_ALTER_STB)] = processAlterStbRsp;
+__async_send_cb_fn_t getMsgRspHandle(int32_t msgType) {
+  switch (msgType) {
+    case TDMT_MND_CONNECT:
+      return processConnectRsp;
+    case TDMT_MND_CREATE_DB:
+      return processCreateDbRsp;
+    case TDMT_MND_USE_DB:
+      return processUseDbRsp;
+    case TDMT_MND_CREATE_STB:
+      return processCreateSTableRsp;
+    case TDMT_MND_DROP_DB:
+      return processDropDbRsp;
+    case TDMT_MND_ALTER_STB:
+      return processAlterStbRsp;
+    default:
+      return genericRspCallback;
+  }
 }
diff --git a/source/dnode/mnode/impl/src/mndDb.c b/source/dnode/mnode/impl/src/mndDb.c
index 1ce1a2590a..245089ddb7 100644
--- a/source/dnode/mnode/impl/src/mndDb.c
+++ b/source/dnode/mnode/impl/src/mndDb.c
@@ -1497,20 +1497,26 @@ char *buildRetension(SArray *pRetension) {
 
   int64_t v1 = getValOfDiffPrecision(p->freqUnit, p->freq);
   int64_t v2 = getValOfDiffPrecision(p->keepUnit, p->keep);
-  len += sprintf(p1 + len, "%" PRId64 "%c:%" PRId64 "%c,", v1, p->freqUnit, v2, p->keepUnit);
-
-  p = taosArrayGet(pRetension, 1);
-
-  v1 = getValOfDiffPrecision(p->freqUnit, p->freq);
-  v2 = getValOfDiffPrecision(p->keepUnit, p->keep);
-  len += sprintf(p1 + len, "%" PRId64 "%c:%" PRId64 "%c,", v1, p->freqUnit, v2, p->keepUnit);
-
-  p = taosArrayGet(pRetension, 2);
-
-  v1 = getValOfDiffPrecision(p->freqUnit, p->freq);
-  v2 = getValOfDiffPrecision(p->keepUnit, p->keep);
   len += sprintf(p1 + len, "%" PRId64 "%c:%" PRId64 "%c", v1, p->freqUnit, v2, p->keepUnit);
 
+  if (size > 1) {
+    len += sprintf(p1 + len, ",");
+    p = taosArrayGet(pRetension, 1);
+
+    v1 = getValOfDiffPrecision(p->freqUnit, p->freq);
+    v2 = getValOfDiffPrecision(p->keepUnit, p->keep);
+    len += sprintf(p1 + len, "%" PRId64 "%c:%" PRId64 "%c", v1, p->freqUnit, v2, p->keepUnit);
+  }
+
+  if (size > 2) {
+    len += sprintf(p1 + len, ",");
+    p = taosArrayGet(pRetension, 2);
+
+    v1 = getValOfDiffPrecision(p->freqUnit, p->freq);
+    v2 = getValOfDiffPrecision(p->keepUnit, p->keep);
+    len += sprintf(p1 + len, "%" PRId64 "%c:%" PRId64 "%c", v1, p->freqUnit, v2, p->keepUnit);
+  }
+
   varDataSetLen(p1, len);
   return p1;
 }
diff --git a/source/libs/parser/src/parTranslater.c b/source/libs/parser/src/parTranslater.c
index f1892d0040..6334d079c8 100644
--- a/source/libs/parser/src/parTranslater.c
+++ b/source/libs/parser/src/parTranslater.c
@@ -2903,7 +2903,6 @@ static int32_t buildRollupAst(STranslateContext* pCxt, SCreateTableStmt* pStmt,
     }
   }
 
-  taosArrayDestroy(dbCfg.pRetensions);
   return code;
 }