Replace one column from fixed width file with another column from another file


 
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# 8  
Old 03-10-2020
The OP specified
Quote:
match (col pos#134, 12 bytes) ... if ... not found in File 2, it should replaced with blank spaces.
, that's what the formatted sprintf is for. As the sample data are just 10 byte long, not 12, we need to wait until resolved by the OP, we can just guess. Try this simplified but more flexible version
Code:
awk -vPOS=134 -vLEN=12 '
NR==FNR    {pat[$1] = $2
            next
           }

           {print substr ($0, 1, POS-1) sprintf ("%*s", LEN, pat[substr ($0, POS, LEN)]) substr ($0, POS+LEN)
           }
' FS='|' File2.txt  File1.txt

These 2 Users Gave Thanks to RudiC For This Post:
# 9  
Old 03-10-2020
Hi, @RudiC
Code:
awk '
NR==FNR {pat[$1] = $2
         next
        }
        {print substr($0, 134, 12)
        }
' FS='|' File2.txt File1.txt | cat -vet

606951-000  $
606951-000  $
607650-000  $
607650-000  $
162010-000  $

Code:
awk '
NR==FNR {pat[$1] = $2
         next
        }
        {print pat[substr($0, 134, 12)]
        }
' FS='|' File2.txt File1.txt | cat -vet
$
...
$

Code:
awk '
NR==FNR {pat[$1] = $2
         next
        }
        {print pat[substr($0, 134, 10)]
        }
' FS='|' File2.txt File1.txt | cat -vet
7543$
7543$
9654$
9654$
$

Then it means so?
Code:
pat[$1"  "] = $2

This User Gave Thanks to nezabudka For This Post:
# 10  
Old 03-10-2020
Thank you to Nezabudka and Rudi C for your inputs.

After doing some additional testing, here's the final code after some tweaking:

Code:
awk '
NR==FNR    {pat[$1] = $2
            next
           }
           {$0 = substr ($0, 1, 133) sprintf ("%-12s", pat[substr ($0, 134, 12)]) substr($0, 146)
           }
1 ' FS='|' File2.txt  File1.txt

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