1DBFILEALTER(1)        User Contributed Perl Documentation       DBFILEALTER(1)
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NAME

6       dbfilealter - alter the format of an Fsdb file, changing the row/column
7       separator
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SYNOPSIS

10       dbfilealter [-c] [-F fs] [-R rs] [-Z compression] [column...]
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DESCRIPTION

13       This program reformats a Fsdb file, altering the row ("-R rs") or
14       column ("-F fs") separator.  It verifies that this action does not
15       violate the file constraints (for example, if spaces appear in data and
16       the new format has space as a separator), and optionally corrects
17       things.
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19       With "-Z compression" it controls compression on the file
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OPTIONS

22       -F or --fs or --fieldseparator S
23           Specify the field (column) separator as "S".  See below for valid
24           field separators.
25
26       -R or --rs or --rowseparator S
27           Specify the row separator as "S".  See below for valid row
28           separators.
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30       -Z or --compression S
31           Specify file compression as given by file extension "S".  Supported
32           compressions are gz for gzip, bz2 for bzip2, xz for xz, or "none"
33           or undef to disable compression.  Default is none.
34
35       -c or --correct
36           Correct any inconsistency caused by the new separators, if
37           possible.
38
39       This module also supports the standard fsdb options:
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41       -d  Enable debugging output.
42
43       -i or --input InputSource
44           Read from InputSource, typically a file name, or "-" for standard
45           input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue
46           objects.
47
48       -o or --output OutputDestination
49           Write to OutputDestination, typically a file name, or "-" for
50           standard output, or (if in Perl) a IO::Handle, Fsdb::IO or
51           Fsdb::BoundedQueue objects.
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53       --autorun or --noautorun
54           By default, programs process automatically, but Fsdb::Filter
55           objects in Perl do not run until you invoke the run() method.  The
56           "--(no)autorun" option controls that behavior within Perl.
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58       --help
59           Show help.
60
61       --man
62           Show full manual.
63
64   Valid Field Separators
65       D default: any amount of whitespace on input, tabs on output.
66       s single space (exactly one space for input and output).
67       S double space on output; two or more spaces on input.
68       t single tab character (exactly one tab for input and output).
69       XN take N as one or more hex digits that specify a unicode character.
70       Accept one or more of those characters on input, output exactly one of
71       those characters.
72       CA take A as a one (unicode) literal character. Accept one or more of
73       those characters on input, output exactly one of those characters.
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75       Potentially in the future "xN" and "cA" will support single-character-
76       on-input equivalents of "XN" and <CA>.
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78   Valid Row Seperators
79       Three row separators are allowed:
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81       D the default, one line per row
82       C complete rowized. Each line is a field-labeled and its value, and a
83       blank line separates "rows". All fields present in the output.
84       I incompletely rowized. Like "C", but null fields are omitted from the
85       output.
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SAMPLE USAGE

88   Input:
89           #fsdb name id test1
90           a 1 80
91           b 2 70
92           c 3 65
93
94   Command:
95           cat data.fsdb | dbfilealter -F S
96
97   Output:
98           #fsdb -F S name id test1
99           a  1  80
100           b  2  70
101           c  3  65
102           #  | dbfilealter -F S
103
104   Command 2:
105           cat data.fsdb | dbfilealter -R C
106
107   Output:
108           #fsdb -R C name id test1
109           name: a
110           id: 1
111           test1: 80
112
113           name: b
114           id: 2
115           test1: 70
116
117           name: c
118           id: 3
119           test1: 65
120
121           #   | dbfilealter -R C
122
123   Correction mode input:
124           #fsdb -F S name id test1
125           a student  1  80
126           b nice  2  70
127           c all  3  65
128
129   Correction mode command:
130           cat correction.fsdb | dbfilealter -c -F D
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132   Correction mode output:
133           #fsdb name id test1
134           a_student   1       80
135           b_nice      2       70
136           c_all       3       65
137           #   | dbfilealter -c -F D
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SEE ALSO

140       Fsdb, dbcoldefine.
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143       Copyright (C) 2008-2018 by John Heidemann <johnh@isi.edu>
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145       This program is distributed under terms of the GNU general public
146       license, version 2.  See the file COPYING with the distribution for
147       details.
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151perl v5.38.0                      2023-07-20                    DBFILEALTER(1)
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