Fan-out: backward vs. forward direction semantics

[Lee-W]

Body

What

Let authors choose whether a fan-out produces keys inside the upstream window or the next one. Example: a weekly artifact W10 (March 4–10) can enable the seven daily partitions inside that week (backward) or the seven following days (March 11–17, forward). Both are valid patterns. Design a valid interface on partition mapper for it

Related

#65654

Committer

• I acknowledge that I am a maintainer/committer of the Apache Airflow project.