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85 lines
2.3 KiB
Python
85 lines
2.3 KiB
Python
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# mysql/cymysql.py
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# Copyright (C) 2005-2014 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+cymysql
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:name: CyMySQL
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:dbapi: cymysql
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:connectstring: mysql+cymysql://<username>:<password>@<host>/<dbname>[?<options>]
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:url: https://github.com/nakagami/CyMySQL
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"""
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import re
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from .mysqldb import MySQLDialect_mysqldb
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from .base import (BIT, MySQLDialect)
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from ... import util
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class _cymysqlBIT(BIT):
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def result_processor(self, dialect, coltype):
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"""Convert a MySQL's 64 bit, variable length binary string to a long.
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"""
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def process(value):
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if value is not None:
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v = 0
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for i in util.iterbytes(value):
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v = v << 8 | i
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return v
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return value
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return process
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class MySQLDialect_cymysql(MySQLDialect_mysqldb):
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driver = 'cymysql'
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description_encoding = None
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supports_sane_rowcount = True
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supports_sane_multi_rowcount = False
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supports_unicode_statements = True
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colspecs = util.update_copy(
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MySQLDialect.colspecs,
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{
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BIT: _cymysqlBIT,
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}
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)
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@classmethod
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def dbapi(cls):
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return __import__('cymysql')
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def _get_server_version_info(self, connection):
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dbapi_con = connection.connection
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version = []
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r = re.compile('[.\-]')
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for n in r.split(dbapi_con.server_version):
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try:
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version.append(int(n))
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except ValueError:
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version.append(n)
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return tuple(version)
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def _detect_charset(self, connection):
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return connection.connection.charset
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def _extract_error_code(self, exception):
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return exception.errno
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def is_disconnect(self, e, connection, cursor):
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if isinstance(e, self.dbapi.OperationalError):
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return self._extract_error_code(e) in \
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(2006, 2013, 2014, 2045, 2055)
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elif isinstance(e, self.dbapi.InterfaceError):
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# if underlying connection is closed,
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# this is the error you get
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return True
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else:
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return False
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dialect = MySQLDialect_cymysql
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