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.. dialect:: postgresql+pg8000
    :name: pg8000
    :dbapi: pg8000
    :connectstring: postgresql+pg8000://user:password@host:port/dbname[?key=value&key=value...]
    :url: https://pythonhosted.org/pg8000/


.. _pg8000_unicode:

Unicode
-------

pg8000 will encode / decode string values between it and the server using the
PostgreSQL ``client_encoding`` parameter; by default this is the value in
the ``postgresql.conf`` file, which often defaults to ``SQL_ASCII``.
Typically, this can be changed to ``utf-8``, as a more useful default::

    #client_encoding = sql_ascii # actually, defaults to database
                                 # encoding
    client_encoding = utf8

The ``client_encoding`` can be overriden for a session by executing the SQL:

SET CLIENT_ENCODING TO 'utf8';

SQLAlchemy will execute this SQL on all new connections based on the value
passed to :func:`.create_engine` using the ``client_encoding`` parameter::

    engine = create_engine(
        "postgresql+pg8000://user:pass@host/dbname", client_encoding='utf8')


.. _pg8000_isolation_level:

pg8000 Transaction Isolation Level
-------------------------------------

The pg8000 dialect offers the same isolation level settings as that
of the :ref:`psycopg2 <psycopg2_isolation_level>` dialect:

* ``READ COMMITTED``
* ``READ UNCOMMITTED``
* ``REPEATABLE READ``
* ``SERIALIZABLE``
* ``AUTOCOMMIT``

.. versionadded:: 0.9.5 support for AUTOCOMMIT isolation level when using
   pg8000.

.. seealso::

    :ref:`postgresql_isolation_level`

    :ref:`psycopg2_isolation_level`


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