kennknowles opened a new issue, #18705: URL: https://github.com/apache/beam/issues/18705
Currently, UNION ALL is implemented as an abstracted set operation that goes through CoGroupByKey, when a flatten will do. This is also incompatible with triggers that fire more than once. Imported from Jira [BEAM-3721](https://issues.apache.org/jira/browse/BEAM-3721). Original Jira may contain additional context. Reported by: kenn. -- 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]
