将时间间隔添加到时间戳。在 Repository 接口中生成 @Query

Question

数据库：Postgres，编程技术：SpringBoot(Java11)

我正在尝试创建 @Query 但我实现它的方式 Hibernate 不会生成它，我得到的异常是间隔函数。我想根据 UserProps 在 modifiedAt 列中添加一些天数，然后决定 Db 是否应该 select 它。我调用了 Postgres INTERVAL 内部函数，但它似乎不起作用

  @Query ("select a job from Job job, Project proj, User u, Userprops props, where job.status LIKE 'CANCELED' AND job.project = proj.id AND \ n" +
             "proj.user = u.id AND props.user = u.id AND NOW () <job.modifiedAt + props.removeThingsAfterDays * FUNCTION ('INTERVAL' '1 day')")
     List <XTMJobEntity> getAllJobsThatShouldBeDeletedFromDbBasedOnUserProps ();

Answer 1

在 Postgres 中 interval 不是函数，而是数据类型。即使它是一个 though，您仍然不会使用 FUNCTION 作为关键字。在 Postgres 中，查询将是（保留过时的连接语法）：

select a job 
  from job job
     , project proj
     , user u
     , userprops props
 where job.status  = 'CANCELED' 
   and job.project = proj.id 
   and proj.user   = u.id 
   and props.user  = u.id 
   and now () <job.modifiedat + props.removethingsafterdays * '1 day'::interval;

---- OR 
    
select a job                                                                    
   from job                                                                     
      , project proj                                                            
      , user u                                                                  
      , userprops props                                                         
  where job.status  = 'CANCELED'                                                
    and job.project = proj.id                                                   
    and proj.user   = u.id                                                      
    and props.user  = u.id                                                      
    and now () <job.modifiedat + props.removethingsafterdays * interval '1 day';

注意：SQL 语句中不带通配符（% 或 _）的 LIKE 等同于等于运算符 (=)。

所以也许你的查询字符串变成：

  @Query ("select a job from Job job, Project proj, User u, Userprops props, where job.status LIKE 'CANCELED' AND job.project = proj.id AND \ n" +
             "proj.user = u.id AND props.user = u.id AND NOW () <job.modifiedAt + props.removeThingsAfterDays * INTERVAL '1 day'")

Answer 2

我的问题的答案如下：

@Query(value = "select job.* " +
       "from jobs job INNER JOIN projects proj ON job.project_id = proj.id INNER JOIN users u ON proj.user_id = u.id " +
       "INNER JOIN user_properties props ON props.user_id = u.id " +
       "where job.status = 'CANCELLED' " +
       "AND NOW() < job.modified_at + props.remove_cancelled_jobs_days * Interval '1days';", nativeQuery = true)

将时间间隔添加到时间戳。在 Repository 接口中生成 @Query

Adding interval to timestamp. Producing @Query in Repository interface

java

postgresql

spring

jpql