public static ShowResultSet execute(ShowStmt statement, ConnectContext context) {
        return GlobalStateMgr.getCurrentState().getShowExecutor().showExecutorVisitor.visit(statement, context);
    }
@Test
    public void testShowEngine() throws AnalysisException, DdlException {
        ShowEnginesStmt stmt = new ShowEnginesStmt();

        ShowResultSet resultSet = ShowExecutor.execute(stmt, ctx);

        Assert.assertTrue(resultSet.next());
        Assert.assertEquals("OLAP", resultSet.getString(0));
    }