将 SQL 转换为 Hibernate 标准

Question

我正在编写一种方法来检索订单总和 (order.total) 高于和低于输入值的客户。

Criteria criteria = DetachedCriteria.forClass(Clients.class, "cl");

if (clOrdsTtlPrcFrom != -1 && clOrdsTtlPrcTo != -1) {
            String sql = "select OwnerID from Orders group by OwnerID having sum(Total) >= :clOrdsTtlPrcFrom and sum(Total) <= :clOrdsTtlPrcTo";
            SQLQuery query = sess.createSQLQuery(sql).addScalar("OwnerID", LongType.INSTANCE);
            query.setParameter("clOrdsTtlPrcFrom", clOrdsTtlPrcFrom);
            query.setParameter("clOrdsTtlPrcTo", clOrdsTtlPrcTo);
            criteria.add(Restrictions.in("id", query.list()));
        }


Criteria criteria2 = sess.createCriteria(Clients.class);
        criteria2.add(Subqueries.propertyIn("id", criteria));
List<Clients> clients = (List<Clients>) criteria2.list();

一切正常，但是，有时我会收到错误消息：

java.sql.SQLException: Prepared or callable statement has more than 2000 parameter markers.

我如何更正此方法，或者，也许，将其转换为完整标准样式？

Answer 1

java.sql.SQLException: Prepared or callable statement has more than 2000 parameter markers`.

当输入参数列表不能超过 2000 时，您可以了解更多此错误的含义。解决方案是您需要将大列表拆分为较小的列表或优化您的 SQL 查询具有小于限制大小的参数。

您必须通过将列表划分为大小小于 2000 的小列表然后运行查询每个较小的列表来解决此问题。然后再次将结果合并到一个列表中。现在您可以按照自己的方式对列表进行分区。

Answer 2

最后，我通过这种方式解决了这个问题，使用sql限制：

DetachedCriteria dtcrt = DetachedCriteria.forClass(Clients.class);
        dtcrt.setProjection(Projections.distinct(Projections.id()));    
if (clOrdsTtlPrcFrom != -1 && clOrdsTtlPrcTo != -1) {
            dtcrt.add(Restrictions.sqlRestriction("OwnerID in(select OwnerID from Orders group by " +
                            "OwnerID having sum(Total) >= ? and sum(Total) <= ?)", new Integer[]{clOrdsTtlPrcFrom, clOrdsTtlPrcTo},
                    new Type[]{StandardBasicTypes.INTEGER, StandardBasicTypes.INTEGER}));
            criteria.add(Subqueries.propertyIn("id", dtcrt));
        }

将 SQL 转换为 Hibernate 标准

Transform SQL to Hibernate criteria

java

sql

hibernate

criteriaquery

`java.sql.SQLException`: Prepared or callable statement has more than 2000 parameter markers`.

将 SQL 转换为 Hibernate 标准

Transform SQL to Hibernate criteria

java

sql

hibernate

criteriaquery

java.sql.SQLException: Prepared or callable statement has more than 2000 parameter markers`.

`java.sql.SQLException`: Prepared or callable statement has more than 2000 parameter markers`.