Hibernate HQL和原生SQL查询的一点区别

1.createSQLQuery

　　1.1默认查询的结果为BigDecimal

　　1.2通过addScalar("CGD_ID", StandardBasicTypes.LONG)可以将结果直接转为Long

　　　　　StringBuffer sb = new StringBuffer();
        sb.append("select g.CGD_ID from em_circle_apply_info a join em_circle_group_def g on a.CAI_CGD_ID = g.CGD_ID ");
        if (size != null) {
            sb.append(" where rownum < " + (size+1));
        }
        sb.append(" group by a.CAI_CGD_ID order by count(a.CAI_CGD_ID) desc ");
        Query query = this.getSession().createSQLQuery(sb.toString()).addScalar("CGD_ID", StandardBasicTypes.LONG);

2.createQuery

　　2.1默认查询结果为Long

　　　　 StringBuffer sb = new StringBuffer();
　　　　 sb.append("select t.caiCgdId.cgdId from EmCircleApplyInfo t ");
        if (size != null) {
            sb.append(" where rownum < " + (size+1));
        }
        sb.append(" group by t.caiCgdId.cgdId order by count(t.caiCgdId) desc");
        Query query = this.getSession().createQuery(sb.toString()).setCacheable(true);
        List<BigDecimal> idList = query.list();
        List<Long> ids = new ArrayList<Long>();
        List<Long> ids = query.list();