Salva created FLINK-39131:
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Summary: Multi-Input Processors
Key: FLINK-39131
URL: https://issues.apache.org/jira/browse/FLINK-39131
Project: Flink
Issue Type: New Feature
Components: API / DataStream
Reporter: Salva
As a DataStream API user, I would like to have a built-in primitive that allows
me to process multiple (more than 2) inputs within a single operator. This
would make it easy to write multi-way joins, preventing the state-explosion
issue recently handled in
[FLIP-516|https://cwiki.apache.org/confluence/display/FLINK/FLIP-516%3A+Multi-Way+Join+Operator]
at the SQL level.
The Operator API already contains all the necessary building blocks, and some
users have reported successfully leveraging them. See, the replies in this
[thread|https://cwiki.apache.org/confluence/display/FLINK/FLIP-516%3A+Multi-Way+Join+Operator]
for example.
I'm personally doing this too, so I wonder whether something like this could be
supported out of the box.
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