MapReduceStep

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Splits incoming data into smaller batches which get processed in parallel The input data is supported as two forms

String - must be a file hash (typicaly used with PersistAsTableStep)
InputStream - will be saved with TableUploadManager, so supports CSV and Excel. But if Excel only the first worksheet will be used

Properties

Name	Returns	Notes	Example
mapFn	String
reduceFn	String

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