1Fsdb::Filter::dbcolcreaUtsee(r3)Contributed Perl DocumenFtsadtbi:o:nFilter::dbcolcreate(3)
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NAME

6       dbcolcreate - create new columns
7

SYNOPSIS

9           dbcolcreate NewColumn1 [NewColumn2]
10
11       or
12
13           dbcolcreate -e DefaultValue NewColumnWithDefault
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DESCRIPTION

16       Create columns "NewColumn1", etc.  with an optional "DefaultValue".
17

OPTIONS

19       -e EmptyValue or --empty
20           Specify the value newly created columns get.
21
22       -f or --first
23           Put all new columns as the first columns of each row.  By default,
24           they go at the end of each row.
25
26       --no-recreate-fatal
27           By default, creating an existing column is an error.  With
28           --no-recreate-fatal, we ignore re-creation.
29
30       This module also supports the standard fsdb options:
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32       -d  Enable debugging output.
33
34       -i or --input InputSource
35           Read from InputSource, typically a file name, or "-" for standard
36           input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue
37           objects.
38
39       -o or --output OutputDestination
40           Write to OutputDestination, typically a file name, or "-" for
41           standard output, or (if in Perl) a IO::Handle, Fsdb::IO or
42           Fsdb::BoundedQueue objects.
43
44       --autorun or --noautorun
45           By default, programs process automatically, but Fsdb::Filter
46           objects in Perl do not run until you invoke the run() method.  The
47           "--(no)autorun" option controls that behavior within Perl.
48
49       --header H
50           Use H as the full Fsdb header, rather than reading a header from
51           then input.
52
53       --help
54           Show help.
55
56       --man
57           Show full manual.
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SAMPLE USAGE

60   Input:
61           #fsdb test
62           a
63           b
64
65   Command:
66           cat data.fsdb | dbcolcreate foo
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68   Output:
69           #fsdb      test    foo
70           a       -
71           b       -
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SEE ALSO

74       Fsdb.
75

CLASS FUNCTIONS

77   new
78           $filter = new Fsdb::Filter::dbcolcreate(@arguments);
79
80       Create a new dbcolcreate object, taking command-line arguments.
81
82   set_defaults
83           $filter->set_defaults();
84
85       Internal: set up defaults.
86
87   parse_options
88           $filter->parse_options(@ARGV);
89
90       Internal: parse command-line arguments.
91
92   setup
93           $filter->setup();
94
95       Internal: setup, parse headers.
96
97   run
98           $filter->run();
99
100       Internal: run over each rows.
101

103       Copyright (C) 1991-2022 by John Heidemann <johnh@isi.edu>
104
105       This program is distributed under terms of the GNU general public
106       license, version 2.  See the file COPYING with the distribution for
107       details.
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111perl v5.38.0                      2023-07-20      Fsdb::Filter::dbcolcreate(3)
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