Dev-iL commented on code in PR #69526:
URL: https://github.com/apache/airflow/pull/69526#discussion_r3597063733
##########
providers/postgres/docs/changelog.rst:
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@@ -49,6 +49,20 @@ Breaking changes
To keep using asyncpg on Airflow 3.4.0+, set
``[database] sql_alchemy_conn_async = postgresql+asyncpg://...``
explicitly.
+.. note::
+ On Airflow 3.4.0 and later, ``psycopg`` (psycopg3) becomes the default
synchronous Postgres
+ driver, mirroring the async default above. ``psycopg[binary]`` is
installed by default to serve it.
+
+ ``psycopg2-binary`` remains installed by default as well. This provider
still supports Airflow
+ cores older than 3.4.0, which normalize the synchronous metadata-database
connection to
+ ``postgresql+psycopg2://`` and have no psycopg fallback; Airflow 2.11
additionally ships
+ SQLAlchemy 1.4, which has no native ``psycopg`` (v3) dialect at all — so
psycopg2 must stay
+ present for those cores to work. It will become opt-in-only (via the
existing ``[psycopg2]``
+ extra) in a future release once the minimum supported Airflow is 3.4.0.
+
+ To keep using psycopg2 on Airflow 3.4.0+, set
+ ``[database] sql_alchemy_conn = postgresql+psycopg2://...`` explicitly.
Review Comment:
Bottom line - I think the comment is in the right place.
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