@Test
public void testExceptionErrorHint() {

    String sql = "/*+TDDL_GROUP({groupIndexx:12})*/select * from tab";
    try {
        GroupHintParser.convertHint2Index(sql);
        Assert.fail();
    } catch (Exception e) {
        Assert.assertEquals("the standard group hint is:'groupIndex:12[,failRetry:true]',current index hint is:groupIndexx:12",
            e.getMessage());
    }
}