1Fsdb::Filter::dbcolrenaUmsee(r3)Contributed Perl DocumenFtsadtbi:o:nFilter::dbcolrename(3)
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NAME

6       dbcolrename - change the names of columns in a fsdb schema
7

SYNOPSIS

9       dbcolrename OldName1 NewName1 [OldName2 NewName2] ...
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DESCRIPTION

12       Dbcolrename changes the names of columns in a fsdb schema, mapping
13       OldName1 to NewName1, and so on for multiple pairs of column names.
14
15       Note that it is valid to do "overlapping" renames like "dbcolrename a b
16       b a".
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OPTIONS

19       No non-standard options.
20
21       This module also supports the standard fsdb options:
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23       -d  Enable debugging output.
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25       -i or --input InputSource
26           Read from InputSource, typically a file name, or "-" for standard
27           input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue
28           objects.
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30       -o or --output OutputDestination
31           Write to OutputDestination, typically a file name, or "-" for
32           standard output, or (if in Perl) a IO::Handle, Fsdb::IO or
33           Fsdb::BoundedQueue objects.
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35       --autorun or --noautorun
36           By default, programs process automatically, but Fsdb::Filter
37           objects in Perl do not run until you invoke the run() method.  The
38           "--(no)autorun" option controls that behavior within Perl.
39
40       --help
41           Show help.
42
43       --man
44           Show full manual.
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SAMPLE USAGE

47   Input:
48           #fsdb account passwd uid gid fullname homedir shell
49           johnh * 2274 134 John_Heidemann /home/johnh /bin/bash
50           greg * 2275 134 Greg_Johnson /home/greg /bin/bash
51           root * 0 0 Root /root /bin/bash
52           # this is a simple database
53
54   Command:
55           cat DATA/passwd.fsdb | dbcolrename fullname first_last
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57   Output:
58           #fsdb      account passwd  uid     gid     first_last      homedir shell
59           johnh * 2274 134 John_Heidemann /home/johnh /bin/bash
60           greg * 2275 134 Greg_Johnson /home/greg /bin/bash
61           root * 0 0 Root /root /bin/bash
62           # this is a simple database
63           #  | dbcolrename fullname first_last
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SEE ALSO

66       Fsdb.
67

CLASS FUNCTIONS

69   new
70           $filter = new Fsdb::Filter::dbcolrename(@arguments);
71
72       Create a new dbcolrename object, taking command-line arguments.
73
74   set_defaults
75           $filter->set_defaults();
76
77       Internal: set up defaults.
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79   parse_options
80           $filter->parse_options(@ARGV);
81
82       Internal: parse command-line arguments.
83
84   setup
85           $filter->setup();
86
87       Internal: setup, parse headers.
88
89   run
90           $filter->run();
91
92       Internal: run over each rows.
93

95       Copyright (C) 1991-2022 by John Heidemann <johnh@isi.edu>
96
97       This program is distributed under terms of the GNU general public
98       license, version 2.  See the file COPYING with the distribution for
99       details.
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103perl v5.36.0                      2023-01-20      Fsdb::Filter::dbcolrename(3)
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