使用mybatis的Criteria 查询、条件过滤用法

 

借鉴博客:https://cloud.tencent.com/developer/article/1979972

 

1、如果业务查询中,有的条件要用括号()括起来达到想要的效果,如:第2个and后面的条件要括起来

  【此业务大概是这样的,即要查他自己所有的,还要查别人share_status=0的,(别人share_status=1的不能查出来)】

select * from tb_examination
where 1=1 

and create_user_id in (
    SELECT id from nsrep_identity.identity_user
    where company_id = 'xxxxx'
)

and ( 
create_user_id
= 'xxxxx' and share_status = 1 or share_status = 0
)

 

2、用mybatis的Criteria写法怎么查?

  那么要使用两个critera,如下:

Example example = new Example(Examination.class);
Example.Criteria1 criteria = example.createCriteria();

criteria1.andIn("createUserId", userIds);


Example.Criteria criteria2 = example.and();
        criteria2.andEqualTo("createUserId", userId);
        criteria2.andEqualTo("shareStatus", 1);
        criteria2.orEqualTo("shareStatus", 0);

 

  上面的criteria代码,相当于sql:where (criteria1的条件)   and (criteria2的条件)

select * from tb_examination
where 1=1 
(
  and create_user_id in (
    SELECT id from nsrep_identity.identity_user
    where company_id = 'xxxxx'
  )
)

and ( 
    create_user_id = 'xxxxx'
    and share_status = 1 or share_status = 0
)

 

  注意的问题:and share_status = 1 or share_status = 0 这里1和0顺序写反了,结果完全不一样,调了老子半天才发现

 

 

 

 

 

 

 

 

 

 

 

 

 

 

posted @ 2022-08-25 17:49  下课后我要去放牛  阅读(1896)  评论(0)    收藏  举报