Lee-W commented on code in PR #63419:
URL: https://github.com/apache/airflow/pull/63419#discussion_r3007818430
##########
airflow-core/newsfragments/aip-76.significant.rst:
##########
@@ -0,0 +1,36 @@
+AIP-76: Asset Partitioning
+
+Airflow 3.2 introduces asset partitioning (time-based), allowing Dags to
produce and consume
+partitioned asset events identified by a ``partition_key`` (e.g.
``2026-03-10T09:00:00`` for
+an hourly partition).
+
+**New timetables** (``airflow.timetables.partitioned``):
+
+- ``CronPartitionTimetable`` — schedules a producer Dag on a cron expression
and emits a
+ partitioned asset event on each run.
+- ``PartitionedAssetTimetable`` — schedules a consumer Dag when the expected
partitioned
+ asset events have arrived.
+
+**Partition mappers** transform upstream partition keys before passing them to
downstream Dags:
+
+- ``IdentityMapper`` — passes the key through unchanged (default).
+- ``ToHourlyMapper``, ``ToDailyMapper``, ``ToWeeklyMapper``,
``ToMonthlyMapper``, ``ToQuarterlyMapper``,
Review Comment:
```suggestion
- ``StartOfHourMapper``, ``StartOfDayMapper``, ``StartOfWeekMapper``,
``StartOfMonthMapper``, ``StartOfQuarterMapper``,
```
##########
airflow-core/newsfragments/aip-76.significant.rst:
##########
@@ -0,0 +1,36 @@
+AIP-76: Asset Partitioning
+
+Airflow 3.2 introduces asset partitioning (time-based), allowing Dags to
produce and consume
+partitioned asset events identified by a ``partition_key`` (e.g.
``2026-03-10T09:00:00`` for
+an hourly partition).
+
+**New timetables** (``airflow.timetables.partitioned``):
+
+- ``CronPartitionTimetable`` — schedules a producer Dag on a cron expression
and emits a
+ partitioned asset event on each run.
+- ``PartitionedAssetTimetable`` — schedules a consumer Dag when the expected
partitioned
+ asset events have arrived.
+
+**Partition mappers** transform upstream partition keys before passing them to
downstream Dags:
+
+- ``IdentityMapper`` — passes the key through unchanged (default).
+- ``ToHourlyMapper``, ``ToDailyMapper``, ``ToWeeklyMapper``,
``ToMonthlyMapper``, ``ToQuarterlyMapper``,
+ ``ToYearlyMapper`` — normalize a datetime partition key to a coarser time
granularity
Review Comment:
```suggestion
``StartOfYearMapper`` — normalize a datetime partition key to a coarser
time granularity
```
##########
airflow-core/newsfragments/aip-76.significant.rst:
##########
@@ -0,0 +1,36 @@
+AIP-76: Asset Partitioning
+
+Airflow 3.2 introduces asset partitioning (time-based), allowing Dags to
produce and consume
+partitioned asset events identified by a ``partition_key`` (e.g.
``2026-03-10T09:00:00`` for
+an hourly partition).
+
+**New timetables** (``airflow.timetables.partitioned``):
+
+- ``CronPartitionTimetable`` — schedules a producer Dag on a cron expression
and emits a
+ partitioned asset event on each run.
+- ``PartitionedAssetTimetable`` — schedules a consumer Dag when the expected
partitioned
+ asset events have arrived.
+
+**Partition mappers** transform upstream partition keys before passing them to
downstream Dags:
+
+- ``IdentityMapper`` — passes the key through unchanged (default).
+- ``ToHourlyMapper``, ``ToDailyMapper``, ``ToWeeklyMapper``,
``ToMonthlyMapper``, ``ToQuarterlyMapper``,
+ ``ToYearlyMapper`` — normalize a datetime partition key to a coarser time
granularity
+ (e.g. ``ToDailyMapper`` maps ``2026-03-10T09:30:00`` → ``2026-03-10``).
Review Comment:
```suggestion
(e.g. ``StartOfDayMapper`` maps ``2026-03-10T09:30:00`` → ``2026-03-10``).
```
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