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# mysql/oursql.py
# Copyright (C) 2005-2017 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php
"""
.. dialect:: mysql+oursql
:name: OurSQL
:dbapi: oursql
:connectstring: mysql+oursql://<user>:<password>@<host>[:<port>]/<dbname>
:url: http://packages.python.org/oursql/
Unicode
-------
Please see :ref:`mysql_unicode` for current recommendations on unicode
handling.
"""
import re
from .base import (BIT, MySQLDialect, MySQLExecutionContext)
from ... import types as sqltypes, util
class _oursqlBIT(BIT):
def result_processor(self, dialect, coltype):
"""oursql already converts mysql bits, so."""
return None
class MySQLExecutionContext_oursql(MySQLExecutionContext):
@property
def plain_query(self):
return self.execution_options.get('_oursql_plain_query', False)
class MySQLDialect_oursql(MySQLDialect):
driver = 'oursql'
if util.py2k:
supports_unicode_binds = True
supports_unicode_statements = True
supports_native_decimal = True
supports_sane_rowcount = True
supports_sane_multi_rowcount = True
execution_ctx_cls = MySQLExecutionContext_oursql
colspecs = util.update_copy(
MySQLDialect.colspecs,
{
sqltypes.Time: sqltypes.Time,
BIT: _oursqlBIT,
}
)
@classmethod
def dbapi(cls):
return __import__('oursql')
def do_execute(self, cursor, statement, parameters, context=None):
"""Provide an implementation of
*cursor.execute(statement, parameters)*."""
if context and context.plain_query:
cursor.execute(statement, plain_query=True)
else:
cursor.execute(statement, parameters)
def do_begin(self, connection):
connection.cursor().execute('BEGIN', plain_query=True)
def _xa_query(self, connection, query, xid):
if util.py2k:
arg = connection.connection._escape_string(xid)
else:
charset = self._connection_charset
arg = connection.connection._escape_string(
xid.encode(charset)).decode(charset)
arg = "'%s'" % arg
connection.execution_options(
_oursql_plain_query=True).execute(query % arg)
# Because mysql is bad, these methods have to be
# reimplemented to use _PlainQuery. Basically, some queries
# refuse to return any data if they're run through
# the parameterized query API, or refuse to be parameterized
# in the first place.
def do_begin_twophase(self, connection, xid):
self._xa_query(connection, 'XA BEGIN %s', xid)
def do_prepare_twophase(self, connection, xid):
self._xa_query(connection, 'XA END %s', xid)
self._xa_query(connection, 'XA PREPARE %s', xid)
def do_rollback_twophase(self, connection, xid, is_prepared=True,
recover=False):
if not is_prepared:
self._xa_query(connection, 'XA END %s', xid)
self._xa_query(connection, 'XA ROLLBACK %s', xid)
def do_commit_twophase(self, connection, xid, is_prepared=True,
recover=False):
if not is_prepared:
self.do_prepare_twophase(connection, xid)
self._xa_query(connection, 'XA COMMIT %s', xid)
# Q: why didn't we need all these "plain_query" overrides earlier ?
# am i on a newer/older version of OurSQL ?
def has_table(self, connection, table_name, schema=None):
return MySQLDialect.has_table(
self,
connection.connect().execution_options(_oursql_plain_query=True),
table_name,
schema
)
def get_table_options(self, connection, table_name, schema=None, **kw):
return MySQLDialect.get_table_options(
self,
connection.connect().execution_options(_oursql_plain_query=True),
table_name,
schema=schema,
**kw
)
def get_columns(self, connection, table_name, schema=None, **kw):
return MySQLDialect.get_columns(
self,
connection.connect().execution_options(_oursql_plain_query=True),
table_name,
schema=schema,
**kw
)
def get_view_names(self, connection, schema=None, **kw):
return MySQLDialect.get_view_names(
self,
connection.connect().execution_options(_oursql_plain_query=True),
schema=schema,
**kw
)
def get_table_names(self, connection, schema=None, **kw):
return MySQLDialect.get_table_names(
self,
connection.connect().execution_options(_oursql_plain_query=True),
schema
)
def get_schema_names(self, connection, **kw):
return MySQLDialect.get_schema_names(
self,
connection.connect().execution_options(_oursql_plain_query=True),
**kw
)
def initialize(self, connection):
return MySQLDialect.initialize(
self,
connection.execution_options(_oursql_plain_query=True)
)
def _show_create_table(self, connection, table, charset=None,
full_name=None):
return MySQLDialect._show_create_table(
self,
connection.contextual_connect(close_with_result=True).
execution_options(_oursql_plain_query=True),
table, charset, full_name
)
def is_disconnect(self, e, connection, cursor):
if isinstance(e, self.dbapi.ProgrammingError):
return e.errno is None and 'cursor' not in e.args[1] \
and e.args[1].endswith('closed')
else:
return e.errno in (2006, 2013, 2014, 2045, 2055)
def create_connect_args(self, url):
opts = url.translate_connect_args(database='db', username='user',
password='passwd')
opts.update(url.query)
util.coerce_kw_type(opts, 'port', int)
util.coerce_kw_type(opts, 'compress', bool)
util.coerce_kw_type(opts, 'autoping', bool)
util.coerce_kw_type(opts, 'raise_on_warnings', bool)
util.coerce_kw_type(opts, 'default_charset', bool)
if opts.pop('default_charset', False):
opts['charset'] = None
else:
util.coerce_kw_type(opts, 'charset', str)
opts['use_unicode'] = opts.get('use_unicode', True)
util.coerce_kw_type(opts, 'use_unicode', bool)
# FOUND_ROWS must be set in CLIENT_FLAGS to enable
# supports_sane_rowcount.
opts.setdefault('found_rows', True)
ssl = {}
for key in ['ssl_ca', 'ssl_key', 'ssl_cert',
'ssl_capath', 'ssl_cipher']:
if key in opts:
ssl[key[4:]] = opts[key]
util.coerce_kw_type(ssl, key[4:], str)
del opts[key]
if ssl:
opts['ssl'] = ssl
return [[], opts]
def _get_server_version_info(self, connection):
dbapi_con = connection.connection
version = []
r = re.compile(r'[.\-]')
for n in r.split(dbapi_con.server_info):
try:
version.append(int(n))
except ValueError:
version.append(n)
return tuple(version)
def _extract_error_code(self, exception):
return exception.errno
def _detect_charset(self, connection):
"""Sniff out the character set in use for connection results."""
return connection.connection.charset
def _compat_fetchall(self, rp, charset=None):
"""oursql isn't super-broken like MySQLdb, yaaay."""
return rp.fetchall()
def _compat_fetchone(self, rp, charset=None):
"""oursql isn't super-broken like MySQLdb, yaaay."""
return rp.fetchone()
def _compat_first(self, rp, charset=None):
return rp.first()
dialect = MySQLDialect_oursql
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