Dev-iL opened a new pull request, #69474:
URL: https://github.com/apache/airflow/pull/69474
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related:
- #68453
- #69089
Mirrors the async default switch: `PostgresHook` no longer requires
`psycopg2` at import time. `psycopg2-binary` moves from a hard dependency to a
new `[psycopg2]` optional extra.
### What changed
- `providers/postgres/pyproject.toml`: `psycopg2-binary` moved from
`dependencies` into a new `"psycopg2"` optional-dependencies extra, with its
existing version constraints preserved. The `apache-airflow>=2.11.0` floor and
the `"sqlalchemy"` extra are unchanged. `uv.lock` regenerated.
- `providers/postgres/src/airflow/providers/postgres/hooks/postgres.py`: the
psycopg2 connection/cursor/`execute_values` imports are now lazy/guarded (same
try/except pattern already used for the psycopg3 import). The module imports
successfully even when psycopg2 isn't installed, and any call site that
genuinely needs the psycopg2 path raises a clear
`AirflowOptionalProviderFeatureException` instead of failing at import time.
`USE_PSYCOPG3`/`is_sqla2` dual-path logic is otherwise unchanged.
- `providers/postgres/README.rst` / `docs/index.rst`: regenerated to include
the new `[psycopg2]` extra.
- `providers/postgres/docs/changelog.rst`: new "Breaking changes" note
describing the sync default change and the remediation (`pip install
apache-airflow-providers-postgres[psycopg2]`).
### Test plan
- New/updated tests in
`providers/postgres/tests/unit/postgres/hooks/test_postgres.py` simulate
psycopg2 being absent (`sys.modules` patching) and confirm the module still
imports, while each of the three guarded call sites (`_get_cursor`,
`_create_connection`, `insert_rows(fast_executemany=True)`) raises the clear,
actionable error rather than a bare traceback.
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