DBCOLDEFINE(1)

NAME
dbcoldefine - define the columns of a plain text file to make it an Fsdb file

SYNOPSIS
dbcoldefine [-F x] [column...]

DESCRIPTION
This program writes a new header before the data with the specified column names. It does not do any validation of the data contents; it is up to the user to verify that, other than the header, the input datastream is a correctly formatted Fsdb file.

OPTIONS

-F or --fs or --fieldseparator s
    Specify the field separator.

--header H
    Give the columns and field separator as a full Fsdb header (including "#fsdb"). Can only be used alone, not with other specifications.

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:
    102400      4937974.964736
    102400      4585247.875904
    102400      5098141.207123

  Command:
    cat DATA/http_bandwidth | dbcoldefine size bw

  Output:
    #fsdb size bw
    102400      4937974.964736
    102400      4585247.875904
    102400      5098141.207123
    # | dbcoldefine size bw

SEE ALSO
Fsdb. dbfilestripcomments

AUTHOR and COPYRIGHT
Copyright (C) 1991-2016 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.