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Truncating text files to a certain number of lines


Truncating text files to a certain number of lines

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Griffster
Griffster
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I've created a text log file in a package to hold execution results, but it's growing in size at an alarming rate. I need to be able to refer to the info in the file, so I don't want to stop it exporting the results to the file, however I would like to limit the number of lines it's exporting at present. As time goes on the earlier logged entries are of less importance to me so I think I can truncate the length of the log file. However I'm not sure what the best method is to delete the first x number of lines from the text file apart from importing in to a sql table and and using a select top command to write out the lines. Seems a bit over the top that though. Any ideas please?
Jeff Moden
Jeff Moden
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Instead of writing to a text file, why not write to a table where each row has a "create date"?

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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Griffster
Griffster
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Is there no way of doing what I'm trying to do with text files though?
Jeff Moden
Jeff Moden
SSC Guru
SSC Guru (51K reputation)SSC Guru (51K reputation)SSC Guru (51K reputation)SSC Guru (51K reputation)SSC Guru (51K reputation)SSC Guru (51K reputation)SSC Guru (51K reputation)SSC Guru (51K reputation)

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You mean withing T-SQL? Sure... import the file... delete the desired rows... export the file. You could also write some VBS using the System File Object to do it for you and use xp_CmdShell to execute it.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
Griffster
Griffster
Old Hand
Old Hand (341 reputation)Old Hand (341 reputation)Old Hand (341 reputation)Old Hand (341 reputation)Old Hand (341 reputation)Old Hand (341 reputation)Old Hand (341 reputation)Old Hand (341 reputation)

Group: General Forum Members
Points: 341 Visits: 713
OK then, so a workaround within SSIS rather than a function of SSIS it sounds. Thanks for your assistance here Jeff.
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