sql查询实体问题。。。。。

public Map delete(JSONObject head, JSONObject body)
throws Exception {
Map attributes=new HashMap();
JSONArray couponJson=body.optJSONArray("couponId");

        String token=head.optString("token");
    Object object=UserCacheManage.getAppUser(token);

    //if(object!=null){
    //UserCache user=(UserCache)object;
    String userId="4028668150c6aedb0150c6ddde750005";
    HhUserEntity hhUserEntity=super.getEntity(HhUserEntity.class, userId);
    if(hhUserEntity!=null){
        String ids="";
        Object [] couponIds=(Object[])couponJson.toArray();
        if(couponIds!=null&&couponIds.length>0){
            for(int i=0;i<couponIds.length;i++){
                if(i==0){
                    ids=ids+"'"+couponIds[i]+"'";
                }else{
                    ids=ids+",'"+couponIds[i]+"'";
                }
            }    
        }
        String query ="SELECT c FROM couponpublish c,couponpool s WHERE s.owner='"+userId+"' and c.pubid=s.pubid";
        List<CouponPublishEntity> list = super.findListbySqlReturnMap(query);
        if(list!=null&&list.size()>0){
            super.deleteAllEntitie(list);
        }

想查询couponpublish表的实体然后删除掉，但是报错Unknown column 'c' in 'field list'
select c这样写不行。。应该咋写= =

c是表名，不能直接 selcet c 你是想显示c表中的所有列吗？可以用 select c.*