Hibernate生成sql查询缺少“（”字符答案

【问题标题】：Hibernate generate sql query missing "(" characterHibernate生成sql查询缺少“（”字符
【发布时间】：2021-10-18 01:31:48
【问题描述】：

我在使用@Query 时遇到了一个问题

    @Query(value = "select c.id as id, c.store_id as store_id, c.name as name, c.type as type, c.rate as rate, " +
        "(select count(pc.partner_id) from partner_commission pc where pc.commission_id = c.id) as number_of_partner " +
        "from commission c join partner_commission pc on c.id = pc.commission_id where c.store_id=:storeId", nativeQuery = true)
    Page<Commission> findCommissionForManagement(@Param("storeId") Long storeId, Pageable pageable);

我已经在数据库 (postgresql) 上测试了这个脚本，它成功了！但是，hibernate生成的sql脚本如下：

Hibernate: select c.id as id, c.store_id as store_id, c.name as name, c.type as type, c.rate as rate, (select count(pc.partner_id) from partner_commission pc where pc.commission_id = c.id) as number_of_partner from commission c join partner_commission pc on c.id = pc.commission_id where c.store_id=? limit ?
Hibernate: select count(pc) from partner_commission pc where pc.commission_id = c.id) as number_of_partner from commission c join partner_commission pc on c.id = pc.commission_id where c.store_id=?
2021-08-16 04:05:44.645  WARN 15976 --- [llCommissions-1] o.h.engine.jdbc.spi.SqlExceptionHelper   : SQL Error: 0, SQLState: 42601
2021-08-16 04:05:44.645 ERROR 15976 --- [llCommissions-1] o.h.engine.jdbc.spi.SqlExceptionHelper   : ERROR: syntax error at or near ")"
  Position: 74

希望能得到帮助

【问题讨论】：

标签： spring postgresql hibernate spring-data-jpa

【解决方案1】：

似乎@Query 错误地分解了子查询。可以使用 Join 重构查询吗？

这是我的建议，未经测试，但我希望您可以进一步调试它以获得您想要的结果。

SELECT
    c.id AS id,
    c.store_id AS store_id,
    c.name AS name,
    c.type AS type,
    c.rate AS rate
    pc.count AS number_of_partner
FROM
    commission c
LEFT JOIN (
    SELECT
        id,
        COUNT(*) AS count
    FROM
        partner_commission
    GROUP BY
        partner_commission.id
) AS pc
ON pc.id = c.store_id
WHERE
    c.store_id = :storeId

【讨论】：

完全没问题。

【解决方案2】：

看起来像一个 Spring Data JPA 错误。您可以尝试通过在 @Query 注释中提供自定义计数查询来解决此问题。

【讨论】：