dbcolcreate man page

dbcolcreate — create new columns

Synopsis

dbcolcreate NewColumn1 [NewColumn2]

or

dbcolcreate -e DefaultValue NewColumnWithDefault

Description

Create columns "NewColumn1", etc. with an optional "DefaultValue".

Options

-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.
--help
Show help.
--man
Show full manual.

Sample Usage

Input

#fsdb test
a
b

Command

cat data.fsdb | dbcolcreate foo

Output

#fsdb      test    foo
a       -
b       -

See Also

Fsdb.

Referenced By

dbcol(1).

2016-11-30 perl v5.24.0 User Contributed Perl Documentation