Gather
(since EVL 1.2)
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
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