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SSIS basics, flat file questions

Posted on 2013-10-22
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Last Modified: 2016-02-11
I understand the basics on SSIS but trying to understand some nuances . . .

my task is simple - read a flat file with one column, right-trim the data, and append " } " to end of record. I've already done this successfully but have a few questions to better understand SSIS.

My flat file has a record size of 103 chars, but with spaces at the end it's 133.

When I point to this file in SSIS for a data connection, it can see the file ok (1 column), but in the Advanced tab it says "OutputColumnWidth = 50" (and InputColumnWidth = 0)
flat-file-connection.png
- why doesn't it "see" that the file size is 103 (or 133) ? I guess 50 is the default no matter what ?

- I don't understand having both "InputColumnWidth" and "OutputColumnWidth" . I just ignored "InputColumnWidth" and got my task completed.
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Question by:Alaska Cowboy
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Assisted Solution

by:Jim Horn
Jim Horn earned 250 total points
ID: 39592045
>read a flat file with one column, right-trim the data, and append " } " to end of record.
In between your source and destination, add a Derived column task, replacing existing column, with an expression that goes like this:

TRIM(ColumnName) + "}"

Open in new window

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Jim Horn earned 250 total points
ID: 39592139
>why doesn't it "see" that the file size is 103 (or 133)
Don't know, but make sure you have the file format and Header row delimeter correct.

>I guess 50 is the default no matter what ?
Correct.
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Author Comment

by:Alaska Cowboy
ID: 39592143
Jim, ok, thanks, I'm getting beyond the beginner phase . . .
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LVL 1

Author Comment

by:Alaska Cowboy
ID: 39593869
Jim, what about this:

>>- I don't understand having both "InputColumnWidth" and "OutputColumnWidth" . I just ignored "InputColumnWidth" and got my task completed.
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Expert Comment

by:Jim Horn
ID: 39593878
Don't know about that one.  I've noticed that it's set when you do a fixed with / ragged right, and usually the same values.
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Author Comment

by:Alaska Cowboy
ID: 39593977
Ok, I'll just keep my eyes on it to see how it's handled in different cases.
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LVL 65

Expert Comment

by:Jim Horn
ID: 39594016
Thanks for the grade.  Good luck with your project.  -Jim
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