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ProcessInput() method

  • October 3, 2012 at 3:34 pm

    #282615

    Hi,

    I have a requirement to see if any rows are present in the input. If they exist, I just have to set a uservariable to true and exit.

    Even if there are input rows, when I run the below I see 2 msg boxes, one with value true and other with false. And finally my uservariable is set as false. Why does it get called twice? How can I fix this?

    Dim bool As Boolean

    Public Overrides Sub Input0_ProcessInput(ByVal buffer As Input0Buffer)

    bool = buffer.NextRow

    MsgBox("Case1:" & bool)

    End Sub

    Public Overrides Sub PostExecute()

    MyBase.PostExecute()

    Me.Variables.case1 = bool

    End Sub

    Thanks and Regards,

    Praveena

  • October 4, 2012 at 10:13 am

    #1545655

    Please let me know if you need more information or if my question wasn't clear. Anyone pls reply.

    Can anyone please try and let me know if you have the same problem.

  • October 9, 2012 at 11:24 am

    #1547311

    venus.pvr (10/3/2012)

    Hi,

    I have a requirement to see if any rows are present in the input. If they exist, I just have to set a uservariable to true and exit.

    Even if there are input rows, when I run the below I see 2 msg boxes, one with value true and other with false. And finally my uservariable is set as false. Why does it get called twice? How can I fix this?

    Dim bool As Boolean

    Public Overrides Sub Input0_ProcessInput(ByVal buffer As Input0Buffer)

    bool = buffer.NextRow

    MsgBox("Case1:" & bool)

    End Sub

    Public Overrides Sub PostExecute()

    MyBase.PostExecute()

    Me.Variables.case1 = bool

    End Sub

    Thanks and Regards,

    Praveena

    If this is script component used as a tranformation, Input0_ProcessInput will be called for each row, this could explain it running twice.

    Not sure how you will get it to fire for no rows? You might be better served with a row count component.

  • October 9, 2012 at 11:56 am

    #1547322

    thank you very much for the response. I found the below post which gives details of how ssis sends data in multiple buffers. ProcessInput method is called once for each buffer.

    http://stackoverflow.com/questions/435487/ssis-processinput-in-pipelinecomponent-gets-called-more-than-once

    getting the rowcount seems to be a more valid souution.

    thanks again

  • October 9, 2012 at 12:27 pm

    #1547332

    I know what that link said, but I can absolutely confirm that when I use script component as a transform that it is called Per Input Row, not per buffer.

  • October 9, 2012 at 1:00 pm

    #1547347

    herladygeekedness (10/9/2012)

    I know what that link said, but I can absolutely confirm that when I use script component as a transform that it is called Per Input Row, not per buffer.

    Are you sure it is not ProcessInputRow() that is called per row? I was using the ProcessInput() method.

  • October 9, 2012 at 1:23 pm

    #1547351

    whew, ok, yes, Thank You, and pardon my adding confusion!

    I have used ProcessInputROW plenty of times, that's what is stuck in my head.

    Sorry !

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