kennknowles opened a new issue, #19515: URL: https://github.com/apache/beam/issues/19515
BeamUnionRel assumes inputs are two and rejects more. So `a UNION b UNION c` will have to be created as UNION(a, UNION(b, c)) and have two shuffles. If BeamUnionRel can handle multiple shuffles, we will have only one shuffle Imported from Jira [BEAM-7049](https://issues.apache.org/jira/browse/BEAM-7049). Original Jira may contain additional context. Reported by: amaliujia. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
