[td-1442]

src/client/src/tscSQLParser.c

@@ -6242,6 +6242,12 @@ int32_t doCheckForQuery(SSqlObj* pSql, SQuerySQL* pQuerySql, int32_t index) {
     }
 
     if (pQueryInfo->intervalTime > 0 && pQueryInfo->intervalTimeUnit != 'n' && pQueryInfo->intervalTimeUnit != 'y') {
+      // to avoid data overflow
+      bool initialWindows = TSWINDOW_IS_EQUAL(pQueryInfo->window, TSWINDOW_INITIALIZER);
+      if (initialWindows) {
+        return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg6);
+      }
+
       int64_t timeRange = ABS(pQueryInfo->window.skey - pQueryInfo->window.ekey);
       // number of result is not greater than 10,000,000
       if ((timeRange == 0) || (timeRange / pQueryInfo->intervalTime) > MAX_INTERVAL_TIME_WINDOW) {