Hotfix/sangshuduo/td 3607 taosdemo buffer overflow (#5721)

* [TD-3607] <fix>: fix taosdemo buffer overflow.

* [TD-3607] <fix>: taosdemo buffer overflow.

add tmp buffer.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix data generation.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix normal table writting.

* [TD-3607] <fix>: taosdemo buffer overflow.

remove tail spaces.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix taosdemo alter table test case.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix taosdemo alter table case.

* [TD-3607] <fix>: taosdemo buffer overflow.

adjust limit offset count warning.

* [TD-3607] <fix>: taosdemo buffer overflow.

add more logic for child tables exist.

* [TD-3607] <fix>: taosdemo buffer overflow.

create database if database be dropped only.

* [TD-3607] <fix>: fix taosdemo buffer overflow.

adjust limit and offset test cases.

* [TD-3607] <fix>: taosdemo buffer overflow.

adjust sample data test case.

* [TD-3607]<fix>: taosdemo limit and offset.

if limit+offset > count

* [TD-3607]<fix>: taosdemo limit and offset.

if child tbl not exist, dont take limit and offset value.

* fix taosdemo limit invalid warning condition.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

src/kit/taosdemo/taosdemo.c

@@ -5165,7 +5165,7 @@ static void startMultiThreadInsertData(int threads, char* db_name,
     int limit, offset;
 
     if ((superTblInfo->childTblExists == TBL_NO_EXISTS) &&
-            ((superTblInfo->childTblOffset != 0) || (superTblInfo->childTblLimit != 0))) {
+            ((superTblInfo->childTblOffset != 0) || (superTblInfo->childTblLimit >= 0))) {
       printf("WARNING: offset and limit will not be used since the child tables are not exists!\n");
     }