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https://github.com/janeczku/calibre-web
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79 lines
2.6 KiB
Python
79 lines
2.6 KiB
Python
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# mysql/mysqldb.py
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# Copyright (C) 2005-2013 the SQLAlchemy authors and contributors <see AUTHORS file>
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#
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# This module is part of SQLAlchemy and is released under
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# the MIT License: http://www.opensource.org/licenses/mit-license.php
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"""
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.. dialect:: mysql+mysqldb
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:name: MySQL-Python
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:dbapi: mysqldb
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:connectstring: mysql+mysqldb://<user>:<password>@<host>[:<port>]/<dbname>
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:url: http://sourceforge.net/projects/mysql-python
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Unicode
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-------
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MySQLdb will accommodate Python ``unicode`` objects if the
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``use_unicode=1`` parameter, or the ``charset`` parameter,
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is passed as a connection argument.
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Without this setting, many MySQL server installations default to
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a ``latin1`` encoding for client connections, which has the effect
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of all data being converted into ``latin1``, even if you have ``utf8``
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or another character set configured on your tables
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and columns. With versions 4.1 and higher, you can change the connection
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character set either through server configuration or by including the
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``charset`` parameter. The ``charset``
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parameter as received by MySQL-Python also has the side-effect of
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enabling ``use_unicode=1``::
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# set client encoding to utf8; all strings come back as unicode
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create_engine('mysql+mysqldb:///mydb?charset=utf8')
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Manually configuring ``use_unicode=0`` will cause MySQL-python to
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return encoded strings::
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# set client encoding to utf8; all strings come back as utf8 str
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create_engine('mysql+mysqldb:///mydb?charset=utf8&use_unicode=0')
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Known Issues
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-------------
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MySQL-python version 1.2.2 has a serious memory leak related
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to unicode conversion, a feature which is disabled via ``use_unicode=0``.
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It is strongly advised to use the latest version of MySQL-Python.
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"""
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from .base import (MySQLDialect, MySQLExecutionContext,
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MySQLCompiler, MySQLIdentifierPreparer)
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from ...connectors.mysqldb import (
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MySQLDBExecutionContext,
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MySQLDBCompiler,
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MySQLDBIdentifierPreparer,
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MySQLDBConnector
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)
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class MySQLExecutionContext_mysqldb(MySQLDBExecutionContext, MySQLExecutionContext):
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pass
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class MySQLCompiler_mysqldb(MySQLDBCompiler, MySQLCompiler):
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pass
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class MySQLIdentifierPreparer_mysqldb(MySQLDBIdentifierPreparer, MySQLIdentifierPreparer):
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pass
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class MySQLDialect_mysqldb(MySQLDBConnector, MySQLDialect):
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execution_ctx_cls = MySQLExecutionContext_mysqldb
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statement_compiler = MySQLCompiler_mysqldb
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preparer = MySQLIdentifierPreparer_mysqldb
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dialect = MySQLDialect_mysqldb
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