Hibernate Create Criteria 两次加入相同的 table - 尝试了 2 种方法，但有 2 种差异错误

Question

我想为以下本地人创建创建条件 sql。

不幸的是，我在两次使用 createCriteria 时遇到了重复关联路径的错误。当我尝试使用 Restrictions.sqlRestriction 时。它无法提供我想要的SQL。

尝试 1：创建条件 - 重复关联路径

 Criteria criteria = getSession().createCriteria( Company.class );
                 criteria.createAlias( "customerCategories", "c1" );
                 criteria.add( Restrictions.in( "c1.customerCategory.customerCategoryId",
                         company.getBaseCustomerCategoryId() ) );
                 criteria.createAlias( "customerCategories", "c2" );
                 criteria.add( Restrictions.in( "c2.customerCategory.customerCategoryId",
                         company.getPromoCustomerCategoryId() ) );

尝试 2：创建 SQL 限制 - ORA-00920：无效的关系运算符，因为 "where"

  Criteria criteria = getSession().createCriteria( Company.class );
                 criteria.add( Restrictions.sqlRestriction(
                         "INNER JOIN Company_Customercategory a on {alias}.companyId = a.companyId and a.CUSTOMERCATEGORYID = ?",
                         company.getBaseCustomerCategoryId(), LongType.INSTANCE ) );
                 criteria.add( Restrictions.sqlRestriction( 
                         "1=1 INNER JOIN Company_Customercategory b on {alias}.companyId = b.companyId
 and b.CUSTOMERCATEGORYID = ?", 
                         company.getPromoCustomerCategoryId(), LongType.INSTANCE) );

错误结果

select this_.* from Companies this_ where 
  INNER JOIN Company_Customercategory a 
  on this_.companyId = a.companyId 
  and a.CUSTOMERCATEGORYID = 1
  and 1=1 INNER JOIN Company_Customercategory b 
  on this_.companyId = b.companyId 
  and b.CUSTOMERCATEGORYID = 6

预计SQL

select * from companies c
  inner join Company_Customercategory a
  on c.companyId = a.companyId
  and a.CUSTOMERCATEGORYID = 1
  inner JOIN Company_Customercategory b
  on a.companyId = b.companyId
  and b.CUSTOMERCATEGORYID = 6

感谢您的帮助。谢谢。

Answer 1

关于 org.hibernate.QueryException: duplicate association path opened 2005 and still open...

的问题，存在一个旧的 Hibernate bug HHH-879

其他问题未解决已关闭HHH-7882

所以选项1)不太合适

但是在上述错误的评论中，使用 exists

提到了一个有用的 解决方法

所以使用两次 sqlRestriction 和 exists 以及一个相关的子查询过滤适当的类别。您只会获得与这两个类别相关联的公司。

crit.add( Restrictions.sqlRestriction( 
  "exists (select null from Company_Customercategory a where {alias}.company_Id = a.company_Id and a.CUSTOMERCATEGORYID = ?)",
  1, IntegerType.INSTANCE ) );
crit.add( Restrictions.sqlRestriction( 
  "exists (select null from Company_Customercategory a where {alias}.company_Id = a.company_Id and a.CUSTOMERCATEGORYID = ?)",
  6, IntegerType.INSTANCE ) );

这将导致以下查询提供正确的结果

select this_.COMPANY_ID as COMPANY_ID1_2_0_, this_.COMPANY_NAME as COMPANY_NAME2_2_0_ 
from COMPANIES this_ 
where exists (select null from Company_Customercategory a 
              where this_.company_Id = a.company_Id and a.CUSTOMERCATEGORYID =  ?) and 
      exists (select null from Company_Customercategory a 
              where this_.company_Id = a.company_Id and a.CUSTOMERCATEGORYID = ?)

Hibernate Create Criteria 两次加入相同的 table - 尝试了 2 种方法，但有 2 种差异错误

Hibernate Create Criteria to join the same table twice - tried 2 approach with 2 difference error

sql

oracle

hibernate

criteria