Hyu Naoki created BEAM-7358:
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Summary: Developing "GroupByMultiKey"
Key: BEAM-7358
URL: https://issues.apache.org/jira/browse/BEAM-7358
Project: Beam
Issue Type: New Feature
Components: beam-model
Reporter: Hyu Naoki
GroupByKey is useful, but it is difficult to express complex grouping
conditions.
I propose the development of the function to group if there is a common term in
even one of multiple keys.
Like this....
{[A, B], "v1"}
{[A, C], "v2"}
{[C, D], "v3"}
{[E, F], "v4"}
↓↓↓↓↓↓↓↓↓
[\{[A, B], "v1"}, \{[A, C], "v2"} , \{[C, D], "v3"} ]
[\{[E, F], "v4"}]
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