[英]How to query a composite id key inside a list
How can I query a composite key field in a multiple IN clause SQL?如何在多 IN 子句 SQL 中查询复合键字段?
My Subsidiary is a composite of a String and a Company我的子公司是字符串和公司的组合
public class Company
{
public virtual String Id { get; set; }
}
public class Subsidiary
{
public virtual String Id { get; set; }
public virtual Company Company { get; set; }
}
public class Disponibility
{
public virtual String IdCompany { get; set; }
public virtual String IdSubsidiary { get; set; }
}
Currently stuck at this目前卡在这个
var subsidiarys = session.Query<Subsidiary>().ToList();
var result = session.Query<Disponibility>().Where(x => subsidiarys.Contains(???) ).ToList();
The generated query needs to be生成的查询需要是
SELECT * FROM VW_DISPONIBILITY D
WHERE (D.COMPANY, D.SUBSIDIARY) IN (SELECT S.COMPANY, S.SUBSIDIARY FROM SUBSIDIARY S);
Not all databases support oracle multiple IN clause so the only way to do this is by concatenating multiples or
.并非所有数据库都支持 oracle 多个 IN 子句,因此唯一的方法是连接多个or
.
var disjunctions = Restrictions.Disjunction();
foreach (var sub in subsidiarys)
{
disjunctions.Add(Restrictions.Where<Disponibility>(x => x.IdCompany == sub.Company.Id && x.IdSubsidiary == sub.Id));
}
var result = session.QueryOver<Disponibility>()
.Where(disjunctions)
.List<Disponibility>();
Generated SQL生成的 SQL
SELECT
...
FROM
VW_DISPONIBILITY this_
WHERE
(
(
this_.COMPANY = :p0
and this_.SUBSIDIARY = :p1
)
or (
this_.COMPANY = :p2
and this_.SUBSIDIARY = :p3
)
...
);
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.