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PDI的steps:(7:Append streams)

2013-05-25 18:11  很大很老实  阅读(199)  评论(0编辑  收藏  举报

种类:flow

id:append

描述:这个step,从2个step读取数据,不过,只处理第二个step的数据(在第一个step完成以后)。

        一般情况下,这2个step的数据行的格式是一模一样的:相同的长度,相同的字段类型,相同的索引等。

 

Important: If you don't care about the order in which the output rows occur, you can use any step to create a union of 2 or more data streams.

 

Options

OptionDescription
Step name Name of the step. Note: This name has to be unique in a single transformation.
Head hop  The name of the step from which will be read from first. 
Tail hop  The name of the step from which will be read from last.