dbcolrename man page

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.

Referenced By

dbcolsplittocols(1), dbcolsplittorows(1).

2017-07-28 perl v5.26.0 User Contributed Perl Documentation