dbcolcreate - Man Page

create new columns

Synopsis

    dbcolcreate NewColumn1 [NewColumn2]

or

    dbcolcreate -e DefaultValue NewColumnWithDefault

Create columns NewColumn1, etc. with an optional DefaultValue.

-e EmptyValue or --empty: Specify the value newly created columns get.
-f or --first: Put all new columns as the first columns of each row. By default, they go at the end of each row.
--no-recreate-fatal: By default, creating an existing column is an error. With --no-recreate-fatal, we ignore re-creation.

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.
--header H: Use H as the full Fsdb header, rather than reading a header from then input.
--help: Show help.
--man: Show full manual.

    #fsdb test
    a
    b

    cat data.fsdb | dbcolcreate foo

    #fsdb      test    foo
    a       -
    b       -

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

2024-08-02 perl v5.40.0 User Contributed Perl Documentation