我正在尝试将mysql代码转换为JPQL。我有两张桌子。第一个表名为Product。它包含以下字段:id和code。第二个表称为Descriptor,它有3个字段:id(来自产品表),代码(来自产品表)和Description,它是特定于Descriptor表的字段。我想加入表格,以便为产品ID和产品代码的每个独特组合添加我想要添加的描述。
The Sql is as follows ( this is correct):
Select Product.id, Product.code, Descriptor.DESCRIPTION
from Product Inner join Descriptor where
Product.id = Descriptor.id and
Product.code = Descriptor.code
(The error is in here)
The JPQL I am trying is as follows which results in a "path" error
select p from Product p INNER JOIN Descriptor d where
p.id = d.id and p.code = d.code;
非常欢迎所有建议,谢谢
答案 0 :(得分:0)
阅读documentation about HQL。在HQL中,使用实体之间的关联来完成连接:
select p from Product p
inner join p.descriptor d
where p.code = d.code;
(假设产品和描述符之间存在OneToOne关联,使用各自的ID)。