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Top Forums Shell Programming and Scripting How to parse fixed-width columns which may include empty fields? Post 302680975 by ahsh79 on Thursday 2nd of August 2012 02:00:34 PM
Old 08-02-2012
How to parse fixed-width columns which may include empty fields?

I am trying to selectively display several columns from a db2 query, which gives me a fixed-width output (partial output listed here):
Code:
--------- -------------------------- ------------ ------
000       0000000000198012           702          29
000       0000000000198013                        29
000                                  702          29
000       0000000000198015           702          03
055       0000000000000001           702


I am trying to accomplish two things:
1. parsing each field from each column, even the ones that are blank
2. put a delimiter of ";" between each field

So expected output would be:

Code:
000;0000000000198012;702;29
000;0000000000198013;;29
000;;702;29
000;0000000000198015;702;03
055;0000000000000001;702;


This is my draft code, which works:
myquery | cut -c 1-9,11-48,60-68,112-142,143-159 --output-delimiter=";"

However my target system does not support any of the GNU utilities, so I cannot use the "output-delimiter" option with cut, or the "FIELDWIDTHS" option with gawk.

So how can I get the desired output, when there are blank fields in some columns?

Thanks in advance for your help!

Last edited by ahsh79; 08-02-2012 at 03:32 PM.. Reason: formatting
 

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SEQDIAG(1)						      General Commands Manual							SEQDIAG(1)

NAME
seqdiag - generate sequence-diagram image file from spec-text file. SYNOPSIS
seqdiag [options] file DESCRIPTION
This manual page documents briefly the seqdiag commands. seqdiag is generate sequence-diagram image file from spec-text file. OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. For a complete description, see the Info files. --version show program's version number and exit -h, --help show this help message and exit -a, --antialias Pass diagram image to anti-alias filter -c FILE, --config=FILE read configurations from FILE -o FILE write diagram to FILE -f FONT, --font=FONT use FONT to draw diagram -T TYPE Output diagram as TYPE format SEE ALSO
The programs are documented fully by http://tk0miya.bitbucket.org/seqdiag/build/html/index.html AUTHOR
seqdiag was written by Takeshi Komiya <i.tkomiya@gmail.com> This manual page was written by Kouhei Maeda <mkouhei@palmtb.net>, for the Debian project (and may be used by others). May 21, 2011 SEQDIAG(1)
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