WHERE子句使用OPENQUERY与链接服务器

我通过ODBC 连接MS SQL Server Express 2012数据库.

我的查询:

Select * from openquery(test,'SELECT * FROM Versuchsanlage_DB WHERE value =27')

但是这个查询

 Select * from openquery(test,
   'SELECT * FROM Versuchsanlage_DB 
    WHERE identifier = AGENT.OBJECTS.Versuchsanlage.Variable_1_Byte')

要么

Select * from openquery(test,
   'SELECT * FROM Versuchsanlage_DB
    WHERE identifier = Variable_1_Byte')

不起作用.为什么？