I am not entirely sure what you are trying to achieve. If the set of data lives somewhere in a file you should be able to read it (e.g. list and fetchfile).   If the data is generated by a script, is that just for testing?   You could look at executescript or ExecuteGroovyScript, or perhaps just generate fake data directly with GenerateFlowFile (though the exact variety that you mention would be tough with the latter) ... View more