@Override
    public void analyze(Analyzer analyzer) throws AnalysisException {
    }
@Test
    public void testGetTuple() throws AnalysisException {
        ArrayList<Expr> groupingExprs = new ArrayList<>();
        String[] cols = {"k1", "k2", "k3", "k1"};
        for (String col : cols) {
            Expr expr = new SlotRef(new TableName("testdb", "t"), col);
            groupingExprs.add(expr);
        }
        GroupByClause groupByClause = new GroupByClause(Expr.cloneList(groupingExprs),
                GroupByClause.GroupingType.GROUP_BY);
        try {
            groupByClause.analyze(analyzer);
        } catch (AnalysisException exception) {
            Assert.assertTrue(false);
        }
    }