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Add '|' to data file on particular position

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# 1  
Add '|' to data file on particular position

I have below scenario where i am getting a flat file but with some bad data

incoming data format
456|a|y90.5|vvv|gbp ----bad data

need to cleanse the bad data above by adding a pipe '|' after 3rd column 'ind' if pipe '|' is not already there

desired output

Note: Indicator column value can be Y or N ,if that helps

Last edited by Scrutinizer; 11-06-2012 at 01:16 PM.. Reason: moved code tags to right place
# 2  
Hi, try:
awk 'NR>1 && $3!~/^[yn]$/{sub(/./,"&|",$3)}1' FS=\| OFS=\| infile1

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