public void execQueryOnVirtualTable( QueryContext queryContext, Session session, String query, LogicalPlan plan, SubmitQueryResponse.Builder response) throws Exception { int maxRow = Integer.MAX_VALUE; if (plan.getRootBlock().hasNode(NodeType.LIMIT)) { LimitNode limitNode = plan.getRootBlock().getNode(NodeType.LIMIT); maxRow = (int) limitNode.getFetchFirstNum(); } QueryInfo queryInfo = context .getQueryJobManager() .createNewSimpleQuery( queryContext, session, query, (LogicalRootNode) plan.getRootBlock().getRoot()); NonForwardQueryResultScanner queryResultScanner = new NonForwardQueryResultSystemScanner( context, plan, queryInfo.getQueryId(), session.getSessionId(), maxRow); queryResultScanner.init(); session.addNonForwardQueryResultScanner(queryResultScanner); response.setState(OK); response.setQueryId(queryInfo.getQueryId().getProto()); response.setResultType(ResultType.ENCLOSED); response.setMaxRowNum(maxRow); response.setTableDesc(queryResultScanner.getTableDesc().getProto()); }