CoGroupByKey

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Aggregates all input elements by their key and allows downstream processing to consume all values associated with the key. While GroupByKey performs this operation over a single input collection and thus a single type of input values, CoGroupByKey operates over multiple input collections. As a result, the result for each key is a tuple of the values associated with that key in each input collection.

See more information in the Beam Programming Guide.

Examples

See BEAM-7390 for updates.