dbfilecat (1) - Linux Manuals

dbfilecat: concatenate two files with identical schema

Command to display dbfilecat manual in Linux: $ man 1 dbfilecat

NAME

dbfilecat - concatenate two files with identical schema

SYNOPSIS

    dbfilecat --input A.fsdb [--input B.fsdb...]

    echo A.fsdb | dbfilecat --xargs

DESCRIPTION

Concatenate all provided input files, producing one result. We remove extra header lines.

Inputs can both be specified with "--input", or one can come from standard input and the other from "--input". With "--xargs", each line of standard input is a filename for input.

Inputs must have identical schemas (columns, column order, and field separators).

Like dbmerge, but no worries about sorting, and with no arguments we read standard input (although that's not very useful).

OPTIONS

General option:

--xargs: Expect that input filenames are given, one-per-line, on standard input. (In this case, merging can start incrementally.
--removeinputs: Delete the source files after they have been consumed. (Defaults off, leaving the inputs in place.)
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:

File a.fsdb:

    #fsdb cid cname
    11 numanal
    10 pascal

File b.fsdb:

    #fsdb cid cname
    12 os
    13 statistics

Command:

    dbfilecat --input a.fsdb --input b.fsdb

Output:

    #fsdb      cid     cname
    11 numanal
    10 pascal
    12 os
    13 statistics
    #  | dbmerge --input a.fsdb --input b.fsdb

AUTHOR and COPYRIGHT

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