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Full Discussion: awk to update file based on match in 3 fields
Top Forums Shell Programming and Scripting awk to update file based on match in 3 fields Post 303014995 by Chubler_XL on Sunday 25th of March 2018 05:47:30 PM
Old 03-25-2018
Few things here.

1. Process file2 first so you can have a[$5,$6,$9] populated when processing files2
2. Why store x[NR] when you are only interested in x[2] I replaced with FNR==2 {x=$5} to only store $5 from the 2nd line of file1
3. If $4 matches x split $4 array and then attempt to match "c." value against the a[] values stored from file2


Code:
wk '
BEGIN { FS=OFS="\t" }
FNR==NR {a[$5,$6,$9]=$1" "$3; next}
FNR==2 {x=$5}  # store value of $5 from line 2

$4 ~ x {      # if $4 matches x[2]
    NM=split($4, array,",");   # Split $4 on "," and storing in array[]
    for(i=1;i<=NM;i++){ # Loop thru each split value from above
        if(index(array[i], x) > 0) {  # If x is in this elelemt
            if (match(array[i], "c[.].*:")) {  # extract pattern c. from split from c. to :
                VAL=substr(array[i], RSTART, RLENGTH-1) # extrace c. value from split in VAL
                if($2 SUBSEP $3 SUBSEP VAL in a) $6=a[$2,$3,VAL]  # if this is in a[] array update $6
            }
        }
    }
}
1' file2 file1  # update $6 in file1 if condition is met

This User Gave Thanks to Chubler_XL For This Post:
cmccabe
 

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lzcmp

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)
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