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Thread: Question about mapping

  1. #1

    Default Question about mapping

    Supose i wanna create a mapping step after an another X step. I would like to know wheter the mapping step is called for each row that leaves this step X or the step X processes all rows before send them to mapping step and the mapping step is called only time and read the rows from the X's buffer.


  2. #2
    DEinspanjer Guest


    Mappings or sub-transformations are basically expanded at execution time into the main transformation. Effectively it is the same as if you had copied all the steps from the sub and pasted them into the main. So each row is passed through the sub-transformation just as if it were a normal step.

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