tswast · Nov 12, 2026 · gemini-code-assist · Nov 12, 2026 · tswast · Nov 12, 2026
@@ -22,7 +22,7 @@ In order to add a feature:
   documentation.
 
 - The feature must work fully on the following CPython versions:
-  3.10, 3.11, 3.12, 3.13 and 3.14 on both UNIX and Windows.
+  3.11, 3.12, 3.13, 3.14 and 3.15 on both UNIX and Windows.
 
 - The feature must not add unnecessary dependencies (where
   "unnecessary" is of course subjective, but new dependencies should
@@ -195,11 +195,11 @@ configure them just like the System Tests.
 
    # Run all tests in a folder
    $ cd samples/snippets
-   $ nox -s py-3.10
+   $ nox -s py-3.14
 
    # Run a single sample test
    $ cd samples/snippets
-   $ nox -s py-3.10 -- -k <name of test>
+   $ nox -s py-3.14 -- -k <name of test>
 
 ********************************************
 Note About ``README`` as it pertains to PyPI
@@ -221,17 +221,17 @@ Supported Python Versions
 
 We support:
 
--  `Python 3.10`_
 -  `Python 3.11`_
 -  `Python 3.12`_
 -  `Python 3.13`_
 -  `Python 3.14`_
+-  `Python 3.15`_
 
-.. _Python 3.10: https://docs.python.org/3.10/
 .. _Python 3.11: https://docs.python.org/3.11/
 .. _Python 3.12: https://docs.python.org/3.12/
 .. _Python 3.13: https://docs.python.org/3.13/
 .. _Python 3.14: https://docs.python.org/3.14/
+.. _Python 3.15: https://docs.python.org/3.15/
 
 
 Supported versions can be found in our ``noxfile.py`` `config`_.

@@ -51,11 +51,11 @@ dependencies.
 
 Supported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^
-Python >= 3.10, <= 3.14
+Python >= 3.11, <= 3.15
 
 Unsupported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Python <= 3.9
+Python <= 3.10
 
 
 Mac/Linux

@@ -51,11 +51,11 @@ dependencies.
 
 Supported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^
-Python >= 3.10, <= 3.14
+Python >= 3.11, <= 3.15
 
 Unsupported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Python <= 3.9
+Python <= 3.10
 
 
 Mac/Linux

@@ -44,15 +44,21 @@
 
 DEFAULT_PYTHON_VERSION = "3.14"
 
-UNIT_TEST_PYTHON_VERSIONS: List[str] = [
+ALL_PYTHON: List[str] = [
     "3.10",
     "3.11",
     "3.12",
     "3.13",
     "3.14",
     "3.15",
 ]
-ALL_PYTHON = list(UNIT_TEST_PYTHON_VERSIONS)
+UNIT_TEST_PYTHON_VERSIONS: List[str] = [
+    "3.11",
+    "3.12",
+    "3.13",
+    "3.14",
+    "3.15",
+]
-ALL_PYTHON: List[str] = [
-    "3.10",
-    "3.11",
-    "3.12",
-    "3.13",
-    "3.14",
-    "3.15",
-]
-ALL_PYTHON = list(UNIT_TEST_PYTHON_VERSIONS)
-UNIT_TEST_PYTHON_VERSIONS: List[str] = [
-    "3.11",
-    "3.12",
-    "3.13",
-    "3.14",
-    "3.15",
-]
+ALL_PYTHON: List[str] = [
+    "3.11",
+    "3.12",
+    "3.13",
+    "3.14",
+    "3.15",
+]
+UNIT_TEST_PYTHON_VERSIONS: List[str] = ALL_PYTHON
-ALL_PYTHON: List[str] = [
-    "3.10",
-    "3.11",
-    "3.12",
-    "3.13",
-    "3.14",
-    "3.15",
-]
-ALL_PYTHON = list(UNIT_TEST_PYTHON_VERSIONS)
-UNIT_TEST_PYTHON_VERSIONS: List[str] = [
-    "3.11",
-    "3.12",
-    "3.13",
-    "3.14",
-    "3.15",
-]
+ALL_PYTHON: List[str] = [
+    "3.11",
+    "3.12",
+    "3.13",
+    "3.14",
+    "3.15",
+]
+UNIT_TEST_PYTHON_VERSIONS: List[str] = ALL_PYTHON
 UNIT_TEST_STANDARD_DEPENDENCIES = [
     "mock",
     "asyncmock",
@@ -94,7 +100,7 @@
     ],
 }
 
-SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ALL_PYTHON
+SYSTEM_TEST_PYTHON_VERSIONS: List[str] = UNIT_TEST_PYTHON_VERSIONS
 SYSTEM_TEST_STANDARD_DEPENDENCIES: List[str] = [
     "mock",
     "pytest",
@@ -302,16 +308,16 @@ def install_unittest_dependencies(session, *constraints):
 @_calculate_duration
 def unit(session, protobuf_implementation, install_extras=True):
     # Install all test dependencies, then install this package in-place.
+    if session.python not in UNIT_TEST_PYTHON_VERSIONS:
+        session.skip(f"Python {session.python} is not supported.")
 
     constraints_path = str(
         CURRENT_DIRECTORY / "testing" / f"constraints-{session.python}.txt"
     )
     install_unittest_dependencies(session, "-c", constraints_path)
 
-    if install_extras and session.python in ["3.11", "3.12", "3.13", "3.14", "3.15"]:
+    if install_extras:
         install_target = ".[geography,alembic,tests,bqstorage]"
-    elif install_extras:
-        install_target = ".[all]"
     else:
         install_target = "."
     session.install("-e", install_target, "-c", constraints_path)
@@ -372,6 +378,9 @@ def install_systemtest_dependencies(session, use_extras=True, *constraints):
 
 def _run_system_test_logic(session, test_type):
     """Shared logic for system, system_noextras, and compliance tests."""
+    if session.python not in SYSTEM_TEST_PYTHON_VERSIONS:
+        session.skip(f"Python {session.python} is not supported.")
+
     constraints_path = str(
         CURRENT_DIRECTORY / "testing" / f"constraints-{session.python}.txt"
     )
@@ -466,7 +475,7 @@ def system(session, test_type):
     _run_system_test_logic(session, test_type)
 
 
-@nox.session(python=SYSTEM_TEST_PYTHON_VERSIONS, venv_backend=VENV_BACKEND)
+@nox.session(python=ALL_PYTHON, venv_backend=VENV_BACKEND)
 @_calculate_duration
 def system_noextras(session):
     """Run the system test suite without extras."""
@@ -494,7 +503,7 @@ def cover(session):
     session.run("coverage", "erase")
 
 
-@nox.session(python="3.10", venv_backend=VENV_BACKEND)
+@nox.session(python="3.11")
 @_calculate_duration
 def docs(session):
     """Build the docs for this library."""
@@ -532,7 +541,7 @@ def docs(session):
     )
 
 
-@nox.session(python="3.10", venv_backend=VENV_BACKEND)
+@nox.session(python="3.11")
 @_calculate_duration
 def docfx(session):
     """Build the docfx yaml files for this library."""
@@ -721,10 +730,7 @@ def core_deps_from_source(session, protobuf_implementation):
     install_unittest_dependencies(session, "-c", constraints_path)
 
     # Mimic unit session install target
-    if session.python in ["3.11", "3.12", "3.13", "3.14", "3.15"]:
-        install_target = ".[geography,alembic,tests,bqstorage]"
-    else:
-        install_target = ".[all]"
+    install_target = ".[geography,alembic,tests,bqstorage]"
     session.install("-e", install_target, "-c", constraints_path)
 
     core_dependencies_from_source = [

@@ -49,7 +49,7 @@ def readme():
 
 extras = {
     "geography": ["GeoAlchemy2", "shapely"],
-    "alembic": ["alembic"],
+    "alembic": ["alembic >= 1.7.7"],
     "tests": ["packaging", "pytz"],
     # Keep the no-op bqstorage extra for backward compatibility.
     # See: https://github.com/googleapis/python-bigquery/issues/757
@@ -63,7 +63,7 @@ def readme():
         # https://github.com/grpc/grpc/pull/15254
         "grpcio >= 1.59.0, < 2.0.0",
         "grpcio >= 1.75.1, < 2.0.0; python_version >= '3.14'",
-        "pyarrow >= 6.0.0",
+        "pyarrow >= 10.0.1",
     ],
 }
 
@@ -100,7 +100,6 @@ def readme():
         "License :: OSI Approved :: MIT License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
@@ -113,12 +112,12 @@ def readme():
     install_requires=[
         "google-api-core >= 2.25.0, <3.0.0",
         "google-auth>=2.14.1,<3.0.0",
-        "google-cloud-bigquery>=3.20.0,<4.0.0",
+        "google-cloud-bigquery>=3.20.1,<4.0.0",
         "packaging",
-        "sqlalchemy>=1.4.16,<3.0.0",
+        "sqlalchemy>=1.4.41,<3.0.0",
     ],
     extras_require=extras,
-    python_requires=">=3.10",
+    python_requires=">=3.11",
     tests_require=["packaging", "pytz"],
     entry_points={
         "sqlalchemy.dialects": ["bigquery = sqlalchemy_bigquery:BigQueryDialect"]

@@ -20,9 +20,6 @@
 SQLAlchemy dialect for Google BigQuery
 """
 
-import sys
-import warnings
-
 from ._types import (
     ARRAY,
     BIGNUMERIC,
@@ -45,19 +42,6 @@
 from .base import BigQueryDialect, SafeCast, dialect, safe_cast
 from .version import __version__
 
-# Now that support for Python 3.7, 3.8 and 3.9 has been removed, we don't expect the
-# following check to succeed. The warning is only included for robustness.
-if sys.version_info < (3, 10):  # pragma: NO COVER
-    warnings.warn(
-        "The python-bigquery-sqlalchemy library no longer supports Python 3.7, "
-        "3.8 and 3.9. "
-        f"Your Python version is {sys.version_info.major}.{sys.version_info.minor}.{sys.version_info.micro}. We "
-        "recommend that you update soon to ensure ongoing support. For "
-        "more details, see: [Google Cloud Client Libraries Supported Python Versions policy](https://cloud.google.com/python/docs/supported-python-versions)",
-        FutureWarning,
-    )
-
-
 __all__ = [
     "__version__",
     "dialect",

@@ -28,7 +28,6 @@
 from typing import Any
 
 import google.api_core.exceptions
-import packaging.version
 import sqlalchemy
 import sqlalchemy.sql.expression
 import sqlalchemy.sql.functions
@@ -368,14 +367,10 @@ def group_by_clause(self, select, **kw):
     # no way to tell sqlalchemy that, so it works harder than
     # necessary and makes us do the same.
 
-    __sqlalchemy_version_info = packaging.version.parse(sqlalchemy.__version__)
-
     __expanding_text = "POSTCOMPILE"
 
     # https://github.com/sqlalchemy/sqlalchemy/commit/f79df12bd6d99b8f6f09d4bf07722638c4b4c159
-    __expanding_conflict = (
-        "" if __sqlalchemy_version_info < packaging.version.parse("1.4.27") else "__"
-    )
+    __expanding_conflict = "__"
 
     __in_expanding_bind = _helpers.substitute_string_re_method(
         rf"""
@@ -553,8 +548,6 @@ def visit_bindparam(
 
         if bindparam.expanding:  # pragma: NO COVER
             assert_(self.__expanded_param(param), f"Unexpected param: {param}")
-            if self.__sqlalchemy_version_info < packaging.version.parse("1.4.27"):
-                param = param.replace(")", f":{bq_type})")
 
         else:
             m = self.__placeholder(param)

@@ -1 +1,15 @@
-numpy>=1.23
+# This constraints file is used to check that lower bounds
+# are correct in setup.py
+# List *all* library dependencies and extras in this file.
+# Pin the version to the lower bound.
+#
+# e.g., if setup.py has "foo >= 1.14.0, < 2.0.0dev",
+sqlalchemy==1.4.41
+google-auth==2.14.1
+google-cloud-bigquery==3.20.1
+google-cloud-bigquery-storage==2.29.0
+google-api-core==2.25.0
+grpcio==1.59.0
+numpy==1.26.4
+alembic==1.7.7
+pyarrow==10.0.1
@@ -19,8 +19,6 @@
 
 import datetime
 
-import packaging.version
-import pytest
 import sqlalchemy
 
 import sqlalchemy_bigquery
@@ -127,10 +125,6 @@ def test_complex_literals_pr_67(engine, bigquery_dataset, metadata):
     # test_unnest_and_struct_access_233 below :)
 
 
-@pytest.mark.skipif(
-    packaging.version.parse(sqlalchemy.__version__) < packaging.version.parse("1.4"),
-    reason="unnest (and other table-valued-function) support required version 1.4",
-)
 def test_unnest_and_struct_access_233(engine, bigquery_dataset, metadata):
     # https://github.com/googleapis/python-bigquery-sqlalchemy/issues/233