diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index 9b73284f7996aa662418b5857e9758309eaf931e..49d89dc5975977927adbfe54aaec860e7c6e35ac 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -769,16 +769,16 @@ static void parse_args(int argc, char *argv[], SArguments *arguments) {
       }
       arguments->sqlFile = argv[++i];
     } else if (strcmp(argv[i], "-q") == 0) {
-      if ((argc == i+1) ||
-        (!isStringNumber(argv[i+1]))) {
+      if ((argc == i+1)
+              || (!isStringNumber(argv[i+1]))) {
         printHelp();
         errorPrint("%s", "\n\t-q need a number following!\nQuery mode -- 0: SYNC, 1: ASYNC. Default is SYNC.\n");
         exit(EXIT_FAILURE);
       }
       arguments->async_mode = atoi(argv[++i]);
     } else if (strcmp(argv[i], "-T") == 0) {
-      if ((argc == i+1) ||
-        (!isStringNumber(argv[i+1]))) {
+      if ((argc == i+1)
+              || (!isStringNumber(argv[i+1]))) {
         printHelp();
         errorPrint("%s", "\n\t-T need a number following!\n");
         exit(EXIT_FAILURE);
@@ -793,24 +793,24 @@ static void parse_args(int argc, char *argv[], SArguments *arguments) {
       }
       arguments->insert_interval = atoi(argv[++i]);
     } else if (strcmp(argv[i], "-qt") == 0) {
-      if ((argc == i+1) ||
-        (!isStringNumber(argv[i+1]))) {
+      if ((argc == i+1)
+              || (!isStringNumber(argv[i+1]))) {
         printHelp();
         errorPrint("%s", "\n\t-qt need a number following!\n");
         exit(EXIT_FAILURE);
       }
       arguments->query_times = atoi(argv[++i]);
     } else if (strcmp(argv[i], "-B") == 0) {
-      if ((argc == i+1) ||
-        (!isStringNumber(argv[i+1]))) {
+      if ((argc == i+1)
+              || (!isStringNumber(argv[i+1]))) {
         printHelp();
         errorPrint("%s", "\n\t-B need a number following!\n");
         exit(EXIT_FAILURE);
       }
       arguments->interlace_rows = atoi(argv[++i]);
     } else if (strcmp(argv[i], "-r") == 0) {
-      if ((argc == i+1) ||
-        (!isStringNumber(argv[i+1]))) {
+      if ((argc == i+1)
+              || (!isStringNumber(argv[i+1]))) {
         printHelp();
         errorPrint("%s", "\n\t-r need a number following!\n");
         exit(EXIT_FAILURE);
@@ -1075,7 +1075,7 @@ static int queryDbExec(TAOS *taos, char *command, QUERY_TYPE type, bool quiet) {
   if (code != 0) {
     if (!quiet) {
       debugPrint("%s() LN%d - command: %s\n", __func__, __LINE__, command);
-      errorPrint("Failed to run %s, reason: %s\n", command, taos_errstr(res));
+      errorPrint("Failed to execute %s, reason: %s\n", command, taos_errstr(res));
     }
     taos_free_result(res);
     //taos_close(taos);
@@ -4079,7 +4079,7 @@ static bool getMetaFromQueryJsonFile(cJSON* root) {
 
   cJSON* gQueryTimes = cJSON_GetObjectItem(root, "query_times");
   if (gQueryTimes && gQueryTimes->type == cJSON_Number) {
-    if (gQueryTimes->valueint < 0) {
+    if (gQueryTimes->valueint <= 0) {
       errorPrint("%s() LN%d, failed to read json, query_times input mistake\n",
         __func__, __LINE__);
       goto PARSE_OVER;
@@ -4130,9 +4130,9 @@ static bool getMetaFromQueryJsonFile(cJSON* root) {
     cJSON* specifiedQueryTimes = cJSON_GetObjectItem(specifiedQuery,
         "query_times");
     if (specifiedQueryTimes && specifiedQueryTimes->type == cJSON_Number) {
-      if (specifiedQueryTimes->valueint < 0) {
-        errorPrint("%s() LN%d, failed to read json, query_times input mistake\n",
-          __func__, __LINE__);
+      if (specifiedQueryTimes->valueint <= 0) {
+        errorPrint("%s() LN%d, failed to read json, query_times: %"PRId64", need be a valid (>0) number\n",
+          __func__, __LINE__, specifiedQueryTimes->valueint);
         goto PARSE_OVER;
 
       }
@@ -4274,9 +4274,9 @@ static bool getMetaFromQueryJsonFile(cJSON* root) {
 
     cJSON* superQueryTimes = cJSON_GetObjectItem(superQuery, "query_times");
     if (superQueryTimes && superQueryTimes->type == cJSON_Number) {
-      if (superQueryTimes->valueint < 0) {
-        errorPrint("%s() LN%d, failed to read json, query_times input mistake\n",
-          __func__, __LINE__);
+      if (superQueryTimes->valueint <= 0) {
+        errorPrint("%s() LN%d, failed to read json, query_times: %"PRId64", need be a valid (>0) number\n",
+          __func__, __LINE__, superQueryTimes->valueint);
         goto PARSE_OVER;
       }
       g_queryInfo.superQueryInfo.queryTimes = superQueryTimes->valueint;
@@ -5240,6 +5240,13 @@ static void* syncWriteInterlace(threadInfo *pThreadInfo) {
 
     startTs = taosGetTimestampMs();
 
+    if (recOfBatch == 0) {
+      errorPrint("[%d] %s() LN%d try inserting records of batch is %"PRIu64"\n",
+              pThreadInfo->threadID, __func__, __LINE__,
+              recOfBatch);
+      errorPrint("%s\n", "\tPlease check if the batch or the buffer length is proper value!\n");
+      goto free_of_interlace;
+    }
     int64_t affectedRows = execInsert(pThreadInfo, buffer, recOfBatch);
 
     endTs = taosGetTimestampMs();