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

NOTE: this page was directly converted from the perl FSDB manual pages from FSDB version 3.1

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