John Heidemann > Fsdb-2.51 > Fsdb::Filter::dbcolrename

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NAME ^

dbcolrename - change the names of columns in a fsdb schema

SYNOPSIS ^

dbcolrename OldName1 NewName1 [OldName2 NewName2] ...

DESCRIPTION ^

Dbcolrename changes the names of columns in a fsdb schema, mapping OldName1 to NewName1, and so on for multiple pairs of column names.

Note that it is valid to do "overlapping" renames like dbcolrename a b b a.

OPTIONS ^

No non-standard options.

This module also supports the standard fsdb options:

-d

Enable debugging output.

-i or --input InputSource

Read from InputSource, typically a file name, or - for standard input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue objects.

-o or --output OutputDestination

Write to OutputDestination, typically a file name, or - for standard output, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue objects.

--autorun or --noautorun

By default, programs process automatically, but Fsdb::Filter objects in Perl do not run until you invoke the run() method. The --(no)autorun option controls that behavior within Perl.

--help

Show help.

--man

Show full manual.

SAMPLE USAGE ^

Input:

    #fsdb account passwd uid gid fullname homedir shell
    johnh * 2274 134 John_Heidemann /home/johnh /bin/bash
    greg * 2275 134 Greg_Johnson /home/greg /bin/bash
    root * 0 0 Root /root /bin/bash
    # this is a simple database

Command:

    cat DATA/passwd.fsdb | dbcolrename fullname first_last

Output:

    #fsdb      account passwd  uid     gid     first_last      homedir shell
    johnh * 2274 134 John_Heidemann /home/johnh /bin/bash
    greg * 2275 134 Greg_Johnson /home/greg /bin/bash
    root * 0 0 Root /root /bin/bash
    # this is a simple database
    #  | dbcolrename fullname first_last

SEE ALSO ^

Fsdb.

CLASS FUNCTIONS ^

new

    $filter = new Fsdb::Filter::dbcolrename(@arguments);

Create a new dbcolrename object, taking command-line arugments.

set_defaults

    $filter->set_defaults();

Internal: set up defaults.

parse_options

    $filter->parse_options(@ARGV);

Internal: parse command-line arguments.

setup

    $filter->setup();

Internal: setup, parse headers.

run

    $filter->run();

Internal: run over each rows.

AUTHOR and COPYRIGHT ^

Copyright (C) 1991-2007 by John Heidemann <johnh@isi.edu>

This program is distributed under terms of the GNU general public license, version 2. See the file COPYING with the distribution for details.

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