dbcoldefine man page

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

Info

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