Home Database Mysql Tutorial SQLServer 的视图自带缓存特效?!

SQLServer 的视图自带缓存特效?!

Jun 07, 2016 pm 03:40 PM
sqlserver condition special effects cache Bring your own view

条件: 1.Entity Framework Code First 2.同一个上下文中(或者叫做一次事务) 3.使用MSSQL 首先用查询一个视图,然后更新与组成视图有关联的表,然后用同样的条件查询视图,未获取到更新的数据。 如果将同样的查询条件放到另外一个上下文中,可以获取已经更

条件:

1.Entity Framework Code First

2.同一个上下文中(或者叫做一次事务)

3.使用MSSQL 

 

首先用查询一个视图,然后更新与组成视图有关联的表,然后用同样的条件查询视图,未获取到更新的数据。

如果将同样的查询条件放到另外一个上下文中,可以获取已经更新的数据。

如果条件有变化,例如从Name='A'编程Name='B',可以获取更新的数据。 

 

大概如下:

using(Context c)

{

c.View.Where(e=>e.Name.Equals("A"));

c.Table.Update();//View是Table和另外一个表构成

c.View.Where(e=>e.Name.Equals("A")); //数据实际被更新,但是这里获取的不是更新后的数据,如果把A改成B,则可以获取到数据。

//另外通过SQL Profile观察过SQL语句,一切正常,三条SQL语句是在数据库被执行了的。 

 

目前还没有去深入研究这个问题,不知道是数据库的问题,还是ADO的问题,或者是EF的问题。

 

烦人呐!!!!! 

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