mirror of
https://github.com/janeczku/calibre-web
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129 lines
3.7 KiB
Python
129 lines
3.7 KiB
Python
# mysql/mysqlconnector.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+mysqlconnector
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:name: MySQL Connector/Python
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:dbapi: myconnpy
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:connectstring: mysql+mysqlconnector://<user>:<password>@<host>[:<port>]/<dbname>
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:url: https://launchpad.net/myconnpy
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"""
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from .base import (MySQLDialect,
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MySQLExecutionContext, MySQLCompiler, MySQLIdentifierPreparer,
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BIT)
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from ... import util
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class MySQLExecutionContext_mysqlconnector(MySQLExecutionContext):
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def get_lastrowid(self):
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return self.cursor.lastrowid
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class MySQLCompiler_mysqlconnector(MySQLCompiler):
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def visit_mod_binary(self, binary, operator, **kw):
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return self.process(binary.left, **kw) + " %% " + \
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self.process(binary.right, **kw)
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def post_process_text(self, text):
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return text.replace('%', '%%')
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class MySQLIdentifierPreparer_mysqlconnector(MySQLIdentifierPreparer):
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def _escape_identifier(self, value):
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value = value.replace(self.escape_quote, self.escape_to_quote)
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return value.replace("%", "%%")
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class _myconnpyBIT(BIT):
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def result_processor(self, dialect, coltype):
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"""MySQL-connector already converts mysql bits, so."""
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return None
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class MySQLDialect_mysqlconnector(MySQLDialect):
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driver = 'mysqlconnector'
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supports_unicode_statements = True
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supports_unicode_binds = True
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supports_sane_rowcount = True
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supports_sane_multi_rowcount = True
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supports_native_decimal = True
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default_paramstyle = 'format'
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execution_ctx_cls = MySQLExecutionContext_mysqlconnector
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statement_compiler = MySQLCompiler_mysqlconnector
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preparer = MySQLIdentifierPreparer_mysqlconnector
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colspecs = util.update_copy(
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MySQLDialect.colspecs,
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{
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BIT: _myconnpyBIT,
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}
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)
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@classmethod
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def dbapi(cls):
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from mysql import connector
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return connector
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def create_connect_args(self, url):
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opts = url.translate_connect_args(username='user')
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opts.update(url.query)
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util.coerce_kw_type(opts, 'buffered', bool)
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util.coerce_kw_type(opts, 'raise_on_warnings', bool)
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opts.setdefault('buffered', True)
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opts.setdefault('raise_on_warnings', True)
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# FOUND_ROWS must be set in ClientFlag to enable
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# supports_sane_rowcount.
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if self.dbapi is not None:
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try:
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from mysql.connector.constants import ClientFlag
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client_flags = opts.get('client_flags', ClientFlag.get_default())
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client_flags |= ClientFlag.FOUND_ROWS
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opts['client_flags'] = client_flags
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except:
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pass
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return [[], opts]
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def _get_server_version_info(self, connection):
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dbapi_con = connection.connection
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version = dbapi_con.get_server_version()
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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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errnos = (2006, 2013, 2014, 2045, 2055, 2048)
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exceptions = (self.dbapi.OperationalError, self.dbapi.InterfaceError)
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if isinstance(e, exceptions):
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return e.errno in errnos or \
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"MySQL Connection not available." in str(e)
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else:
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return False
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def _compat_fetchall(self, rp, charset=None):
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return rp.fetchall()
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def _compat_fetchone(self, rp, charset=None):
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return rp.fetchone()
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dialect = MySQLDialect_mysqlconnector
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