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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2022/06/03 22:04:15 UTC

[GitHub] [beam] kennknowles opened a new issue, #19041: WindowingStrategy, Window fields in the project as a trait of a Rel

kennknowles opened a new issue, #19041:
URL: https://github.com/apache/beam/issues/19041

   Currently, WindowingStrategy is just a property of a PCollection but is unknown during planning. As with boundedness / unboundedness, this should be available statically so it can affect the plan. It may not be literally a WindowingStrategy object, but a SQL-level equivalent.
   
   One windowing-related thing that is interesting is which fields represent the window. If we know this, then we know we can support per-window equijoins as long as a join condition also does an equijoin on the window.
   
   Imported from Jira [BEAM-4721](https://issues.apache.org/jira/browse/BEAM-4721). Original Jira may contain additional context.
   Reported by: kenn.


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