EVL

Table of Contents


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Cut

(since EVL 1.0)

Remove columns from input records. Use this component when you want to reduce the number of columns.

Cut

is to be used in EVS job structure definition file. <f_in> and <f_out> are either input and output file or flow name.

evl cut

is intended for standalone usage, i.e. to be invoked from command line and read records from standard input and write to standard output.

EVD is EVL data definition file, for details see evl-evd(5).

Synopsis

syntax/Cut
Cut
  <f_in> <f_out> (<evd_in>|-D <inline_evd) (<evd_out>|-d <inline_evd>)
  [--validate] [-x|--text-input] [-y|--text-output]

evl cut
  (<evd_in>|-D <inline_evd) (<evd_out>|-d <inline_evd>)
  [--validate] [-x|--text-input] [-y|--text-output]
  [-v|--verbose]

evl cut
  ( --help | --usage | --version )

Options

-D, --input-definition=<inline_evd>

either this option or the file <evd_in> must be presented. Example: -D ’id int, user_id string’

-d, --output-definition=<inline_evd>

either this option or the file <evd_out> must be presented. Example: -d ’user_sum long’

--validate

without this option, no fields are checked against data types. With this option, all output fields are checked

-x, --text-input

suppose the input as text, not binary

-y, --text-output

write the output as text, not binary

Standard options:

--help

print this help and exit

--usage

print short usage information and exit

-v, --verbose

print to stderr info/debug messages of the component

--version

print version and exit

Examples

  1. Print to stdout only integer field ‘id’:
    evl cut example.evd -d'id int' -xy <in.txt