EVL

Table of Contents


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Gather

Gather several input flows or files into one output flow or file in round-robin fashion.

Gather

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 gather

is intended for standalone usage, i.e. to be invoked from command line. When <file> is ’-’, then read from stdin.

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

Synopsis

syntax/Gather
Gather
  <f_in>... <f_out> (<evd>|-d <inline_evd>)
  [--validate] [-x|--text-input] [-y|--text-output]

evl gather
  [<file>...]  (<evd>|-d <inline_evd>)
  [--validate] [-x|--text-input] [-y|--text-output]
  [-v|--verbose]

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

Options

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

either this option or the file <evd> must be presented. Example: -d ’id int, user_id string(6) enc=iso-8859-1’

--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

evl gather file.a file.b file.c file.evd -xy

print to stdout first record of file.a then first record of file.b then first record of file.c, then second records and so on