SSIS中DataReader源无法使用参数的解决办法

如果是OLEDB源可以使用如下的sql命令，但是DataReader中会报语法错误。

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select * from 表where 字段=?

要解决这个问题可以使用属性表达式，比如我们在ssis中用DataReader源查询一下sysobjects表中xtype='U'的结果。

这里假如已经设定过一个用户变量 用户::xType

１、用属性表达式，就不用理会DataReader本身的sql命令设置，当然事先设置测试SQL语句可以得到结果的输出列给下游组建。
２、设置一属性表达式只要右键点击图上黄色区域就可以了。
　
３、属性表达式中设计动态sql语句


4、确定，这样就可以把筛选过的结果集传给下游了。