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# dialects/postgresql/psycopg2cffi.py
# Copyright (C) 2005-2024 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: https://www.opensource.org/licenses/mit-license.php
# mypy: ignore-errors
r"""
.. dialect:: postgresql+psycopg2cffi
:name: psycopg2cffi
:dbapi: psycopg2cffi
:connectstring: postgresql+psycopg2cffi://user:password@host:port/dbname[?key=value&key=value...]
:url: https://pypi.org/project/psycopg2cffi/
``psycopg2cffi`` is an adaptation of ``psycopg2``, using CFFI for the C
layer. This makes it suitable for use in e.g. PyPy. Documentation
is as per ``psycopg2``.
.. seealso::
:mod:`sqlalchemy.dialects.postgresql.psycopg2`
""" # noqa
from .psycopg2 import PGDialect_psycopg2
from ... import util
class PGDialect_psycopg2cffi(PGDialect_psycopg2):
driver = "psycopg2cffi"
supports_unicode_statements = True
supports_statement_cache = True
# psycopg2cffi's first release is 2.5.0, but reports
# __version__ as 2.4.4. Subsequent releases seem to have
# fixed this.
FEATURE_VERSION_MAP = dict(
native_json=(2, 4, 4),
native_jsonb=(2, 7, 1),
sane_multi_rowcount=(2, 4, 4),
array_oid=(2, 4, 4),
hstore_adapter=(2, 4, 4),
)
@classmethod
def import_dbapi(cls):
return __import__("psycopg2cffi")
@util.memoized_property
def _psycopg2_extensions(cls):
root = __import__("psycopg2cffi", fromlist=["extensions"])
return root.extensions
@util.memoized_property
def _psycopg2_extras(cls):
root = __import__("psycopg2cffi", fromlist=["extras"])
return root.extras
dialect = PGDialect_psycopg2cffi
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