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Create dynamic filename in SSIS

Posted on 2010-11-12
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Last Modified: 2012-06-22
Hi,

I'm migrating a DTS package to SSIS. In the DTS, I have an ActiveX Script that set a variable (filename with date and time as the file extension) and a Dynamic Properties Task that set the filename to a Text-File destination feeded by a Transform Data Task that uses a SQL query that extract and format the data to the required field-length. That works fine.

Now, I need to do the same in SSIS. Flat-File Connection Manager ask for an existing file. But this file is created by the DTS, it doesn't exist yet. And anyway, filename should be dynamic.

I tried Raw File, where I can select a variable as filename, but the output is binary.

The result file is imported by a SAP ERP system, so it has to match the required fix field-length.

how can I do this in SSIS?

thanks for your time and help
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Question by:Dominic34
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Expert Comment

by:EvilPostIt
ID: 34121085
You will be able to do the same thing with a csv destination. You will need to set the destination filename as either an expression or a variable. If variable you will be able to evaluate the variable as an expression.
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Author Comment

by:Dominic34
ID: 34121438
how can I set the destination as a variable? When setting up a flat-file connection, it ask for a valid file name, I have to input something there. How can I use Expression to dynamically change filename of a flat-file connection ?
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EvilPostIt earned 2000 total points
ID: 34121496
In the properties of the flat file connection manager you will see a section called expressions. In the expressions section set the Property to be updated to ConnectionString and enter your expression to build your filename.

Yuo will still have to enter a filename so it will validate but upon run-time this will be over-ridden.
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LVL 16

Expert Comment

by:EvilPostIt
ID: 34121503
When i say "In the expressions section" you will have to click the ... button.
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Author Comment

by:Dominic34
ID: 34121752
ok good. I've set the property to my variable name. But don't know why, the variable never changes when I execute the ActiveX Script:

Function Main()
dim NomFic
      NomFic = year(now())  & Pad2Left(month(now()))  & Pad2Left(day(now())) & Pad2Left(hour(now())) & Pad2Left(minute(now()))
      DTSGlobalVariables("APicking").value = DTSGlobalVariables("Path").value + DTSGlobalVariables("APickingName").value + NomFic

      Main = DTSTaskExecResult_Success
End Function

Function Pad2Left(ByVal Value)
   Pad2Left = Right("0" & CStr(Value), 2)
End Function

I have set the ConnectionString Expression to the variable "APicking". The ActiveX is executed before the Data Flow Task. Variable is not ReadOnly. But it don't changes and I generate same filename everytime.
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LVL 16

Expert Comment

by:EvilPostIt
ID: 34121776
If you look at the properties of the variable and set EvaluateAsExpression you can actually set the value of the variable there. You shouldnt need to use a script task to do this.
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Author Comment

by:Dominic34
ID: 34121867
ok sorry, I had a bug in my variable. File create with correct name and data is fed into it. Still have a problem with the formatting. All rows are inserted into a single line in the file. There is no CR/LF, although Row Delimiter is CR/LF and preview of data is looking good...
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Author Comment

by:Dominic34
ID: 34122056
This is my extraction query:
SELECT  DISTINCT
RTRIM( dbo.PAD(a.[vpmOrder], 22, ' ', 'L')) AS PO,
      RTRIM(dbo.PAD(a.itmCode, 6, ' ', 'L')) AS ITEM,
      'V' as TYPE,
      RTRIM( dbo.PAD(a.[vpmNoColis], 20, ' ', 'L')) as COLIS,
      dbo.PAD(a.[itmQtyReelle], 6, '0', 'L') AS QTY,
      RTRIM( dbo.PAD(b.[orderDate], 8, ' ', 'L')) as DATE
FROM   TB_vpmPreColisage a
INNER JOIN  [TB_vpmOrder] b ON a.[vpmOrder] = b.[orderNO]
INNER JOIN [TB_vpmColis]  ON TB_vpmColis.[vpmNoColis] = a.[vpmNoColis]
WHERE [orderCompleted] IS NOT NULL AND b.[orderTreated] IS NULL

In Flat-File Connection Manager, I selected an existing valid file and delimited the width of each columns. Row Delimited is CR/LF. Output file gives:
              1007540 04235V         S075400221200003520101115                 1007540 09263V         C075400041200001520101115 ....
all the extracted data into a single row....And the preview looks good.

What I'm doing wrong?
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Author Comment

by:Dominic34
ID: 34122470
ok found it. I had to select "Ragged Right" in the Format properties of the Flat-File Connection Manager to have the CR/LF add at the end of each row.

works like a charm now
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