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Full Discussion: Shell script to apply functions to multiple columns dynamically
Top Forums Shell Programming and Scripting Shell script to apply functions to multiple columns dynamically Post 303025751 by RudiC on Sunday 11th of November 2018 12:24:04 PM
Old 11-11-2018
Please be aware that the md5sum of '10,abc' will NEVER be 73aca49763216fb96bbc2acef7b60afb as it is case sensitive.
Looks like you want a comma included. Try
Code:
awk -F\| '
NR == 1         {for (i=1; i<=NF; i++) if ("," MCOL "," ~ "," $i ",") COL[++CNT] = i
                 print $0, "HASHED COLUMNS", "HASHVALUE"
                 next
                }
                {TMP = ""
                 for (i=1; i<=CNT; i++) TMP = TMP "," $(COL[i])
                 ("echo -n " substr (TMP, 2) " | md5sum") | getline MD5
                 sub (/ *-/, "", MD5)
                 print $0, MCOL, MD5
                }
' OFS="|" MCOL="ID,NAME" file
ID|NAME|AGE|GENDER|HASHED COLUMNS|HASHVALUE
10|ABC|30|M|ID,NAME|73aca49763216fb96bbc2acef7b60afb
20|DEF|20|F|ID,NAME|9d6555fe65eb60b2f7d9174b56f667f5

This User Gave Thanks to RudiC For This Post:
mkathi
 

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LEARN ABOUT DEBIAN

dpkg-awk

DPKG-AWK(1)						      General Commands Manual						       DPKG-AWK(1)

NAME

       dpkg-awk - Utility to read a dpkg style db file

SYNOPSIS

       dpkg-awk [(-f|--file) filename] [(-d|--debug) ##] [(-s|--sort) list] [(-rs|--rec_sep) ??] '<fieldname>:<regex>' ... -- <out_fieldname> ..

DESCRIPTION

       dpkg-awk  Parses  a  dpkg status file (or other similarly formatted file) and outputs the resulting records.  It can use regex on the field
       values to limit the returned records, it can also be told which fields to output, and it can sort the matched fields.

OPTIONS

       -f filename
       --file filename
	      The file to parse.  The default is /var/lib/dpkg/status.

       -d [#]
       --debug [#]
	      Each time this is specified, it increased the debug level.

       -s field(s)
       --sort field(s)
	      A space or comma separated list of fields to sort on.

       -n field(s)
       --numeric field(s)
	      A space or comma separated list of fields that should be interpreted as numeric in value.

       -rs ??
       --rec_sep ??
	      Output this string at the end of each output paragraph.

       -h
       --help Display some help.

       fieldname
	      The fields from the file, that are matched with the regex given.	The fieldnames are case insensitive.

       out_fieldname
	      The fields from the file, that are output for each record.  If the first field listed begins with ^, then the list  of  fields  that
	      follows will NOT be output.

BUGS

       Be  warned  that  the author has only a shallow understanding of the dpkg packaging system, so there are probably tons of bugs in this pro-
       gram.

       This program comes with no warranties.  If running this program causes fire and brimstone to rain down upon the earth, you will be on  your
       own.

       This program accesses the dpkg database directly in places, querying for data that cannot be gotten via dpkg.

AUTHOR

       Adam Heath <doogie@debian.org>

DEBIAN
								 Debian Utilities						       DPKG-AWK(1)
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