[td-225] fix the bug found by crash_gen

src/client/src/tscServer.c

@@ -451,7 +451,7 @@ int doProcessSql(SSqlObj *pSql) {
   
   if (pRes->code != TSDB_CODE_SUCCESS) {
     tscAsyncResultOnError(pSql);
-    return pRes->code;
+    return TSDB_CODE_SUCCESS;
   }
 
   int32_t code = tscSendMsgToServer(pSql);
@@ -460,7 +460,7 @@ int doProcessSql(SSqlObj *pSql) {
   if (code != TSDB_CODE_SUCCESS) {
     pRes->code = code;
     tscAsyncResultOnError(pSql);
-    return code;
+    return  TSDB_CODE_SUCCESS;
   }
   
   return TSDB_CODE_SUCCESS;

src/client/src/tscSql.c

@@ -696,7 +696,7 @@ static void tscKillSTableQuery(SSqlObj *pSql) {
     }
 
     tscAsyncResultOnError(pSubObj);
-    taosReleaseRef(tscObjRef, pSubObj->self);
+    // taosRelekaseRef(tscObjRef, pSubObj->self);
   }
 
   if (pSql->subState.numOfSub <= 0) {

src/client/src/tscSubquery.c

@@ -2362,7 +2362,7 @@ static int32_t tscReissueSubquery(SRetrieveSupport *oriTrs, SSqlObj *pSql, int32
     taos_free_result(pSql);
     return ret;
   } else {    
-    pSql->pSubs[trsupport->subqueryIndex] = pSql;
+    pParentSql->pSubs[trsupport->subqueryIndex] = pSql;
     tscFreeRetrieveSup(pNew);
     taos_free_result(pNew);
     return ret;