休眠条件：休眠左联接而无关联

Question

I am a Hibernate newbie and i have this below query. It is working as i expected. These two tables are not associated. Is there a way to get the same result by using Criteria API or how can i run this query via Hibernate ? Any help would be appreciated.

SELECT p.title, c.content
  FROM posts p
  LEFT JOIN comments c ON p.id = c.post_id
  WHERE p.status = 'A' AND (p.title iLIKE '%r%' OR c.content iLIKE '%r%');

Answer 1

Criteria API needs a path between entities, so I'm not sure this join could be done using Criteria API. Better do it with HQL if you have Hibernate >= 5.1:

select p.title, c.content
from org.example.Posts p
left outer join org.example.Comments c
on p.id = c.id
where p.status = 'A' AND (lower(p.title) LIKE '%r%' OR lower(c.content) LIKE '%r%');

Still, you could stick to using SQL queries with Hibernate or better still, create association between Posts and Comments.