Question

我有两个班级：

public class DepotType
{
   public virtual Depot Depot {get;set;}
   /*other properties*/
}

public class Depot
{
   public virtual string Name {get;set;}
   /*other properties*/
}

我做了以下odata查询：

http://localhost:63236/OData/DepotPlaces?$expand=Depot&$filter=Depot/Name eq 'asd'

但是，我收到以下错误：ORA-12704: character set mismatch

Nhibernate生成以下sql：

SELECT ...
FROM "DepotPlaces" depotplace0_
LEFT OUTER JOIN "Depots" depot1_ ON depotplace0_."depotId"=depot1_."id"
WHERE 
   cast(CASE WHEN depotplace0_."depotId" IS NULL 
             THEN :p0 
             ELSE depot1_."depotName" 
       END AS VARCHAR2(255))=:p1

:p0 = NULL [Type: String (0)], :p1 = 'asd' [Type: String (0)]

我尝试手动编写类似的LINQ查询：

var test = _repository.Query().Where(d => d.Depot.Name == "asd").ToList();

生成的sql：

SELECT ...
FROM "DepotPlaces" depotplace0_
INNER JOIN "Depots" depot1_ ON depotplace0_."depotId"=depot1_."id"
WHERE depot1_."depotName"=:p0;

:p0 = 'asd' [Type: String (0)]

CAST运算符的主要区别。我不知道为什么它存在于第一个sql查询中。而且，如果我在SQL Developer中运行此查询，则会收到相同的错误。如果我删除p0参数并写入NULL，则脚本可以正常工作。

Answer 1

找到了答案。我必须添加以下选项：

[EnableQuery(HandleNullPropagation = HandleNullPropagationOption.False)]

odata，nhibernate生成ORA-12704：字符集不匹配

1 个答案: