[TD-3357] <fix>: fix child table count if exists. (#5542)

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

src/kit/taosdemo/taosdemo.c

@@ -2422,12 +2422,9 @@ static int createDatabases() {
                 &g_Dbs.db[i].superTbls[j], g_Dbs.use_metric);
       } else {      
         g_Dbs.db[i].superTbls[j].superTblExists = TBL_ALREADY_EXISTS;
-
-        if (g_Dbs.db[i].superTbls[j].childTblExists != TBL_ALREADY_EXISTS) {
         ret = getSuperTableFromServer(taos, g_Dbs.db[i].dbName,
                 &g_Dbs.db[i].superTbls[j]);
       }
-      }
 
       if (0 != ret) {
         printf("\ncreate super table %d failed!\n\n", j);
@@ -2514,8 +2511,8 @@ static void* createTable(void *sarg)
     len = 0;
     verbosePrint("%s() LN%d %s\n", __func__, __LINE__, buffer);
     if (0 != queryDbExec(winfo->taos, buffer, NO_INSERT_TYPE)){
-      errorPrint( "queryDbExec() failed. buffer:\n%s\n", buffer);
       free(buffer);
+      errorPrint( "queryDbExec() failed. buffer:\n%s\n", buffer);
       return NULL;
     }
 
@@ -4530,7 +4527,6 @@ static void* syncWriteInterlace(threadInfo *pThreadInfo) {
       recOfBatch += batchPerTbl;
       startTime += batchPerTbl * superTblInfo->timeStampStep;
       pThreadInfo->totalInsertRows += batchPerTbl;
-
       verbosePrint("[%d] %s() LN%d batchPerTbl=%d recOfBatch=%d\n",
                 pThreadInfo->threadID, __func__, __LINE__,
                 batchPerTbl, recOfBatch);