[TD-4070]<fix>: taosdemo use friendly msg if the setting has improper values. (#6041)

Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

src/kit/taosdemo/taosdemo.c

@@ -1072,7 +1072,7 @@ 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);
@@ -5200,6 +5200,13 @@ 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();