mirror of
https://github.com/SickGear/SickGear.git
synced 2024-12-11 05:33:37 +00:00
179 lines
6.2 KiB
Python
179 lines
6.2 KiB
Python
# firebird/kinterbasdb.py
|
|
# Copyright (C) 2005-2014 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:: firebird+kinterbasdb
|
|
:name: kinterbasdb
|
|
:dbapi: kinterbasdb
|
|
:connectstring: firebird+kinterbasdb://user:password@host:port/path/to/db[?key=value&key=value...]
|
|
:url: http://firebirdsql.org/index.php?op=devel&sub=python
|
|
|
|
Arguments
|
|
----------
|
|
|
|
The Kinterbasdb backend accepts the ``enable_rowcount`` and ``retaining``
|
|
arguments accepted by the :mod:`sqlalchemy.dialects.firebird.fdb` dialect. In addition, it
|
|
also accepts the following:
|
|
|
|
* ``type_conv`` - select the kind of mapping done on the types: by default
|
|
SQLAlchemy uses 200 with Unicode, datetime and decimal support. See
|
|
the linked documents below for further information.
|
|
|
|
* ``concurrency_level`` - set the backend policy with regards to threading
|
|
issues: by default SQLAlchemy uses policy 1. See the linked documents
|
|
below for futher information.
|
|
|
|
.. seealso::
|
|
|
|
http://sourceforge.net/projects/kinterbasdb
|
|
|
|
http://kinterbasdb.sourceforge.net/dist_docs/usage.html#adv_param_conv_dynamic_type_translation
|
|
|
|
http://kinterbasdb.sourceforge.net/dist_docs/usage.html#special_issue_concurrency
|
|
|
|
"""
|
|
|
|
from .base import FBDialect, FBExecutionContext
|
|
from ... import util, types as sqltypes
|
|
from re import match
|
|
import decimal
|
|
|
|
|
|
class _kinterbasdb_numeric(object):
|
|
def bind_processor(self, dialect):
|
|
def process(value):
|
|
if isinstance(value, decimal.Decimal):
|
|
return str(value)
|
|
else:
|
|
return value
|
|
return process
|
|
|
|
class _FBNumeric_kinterbasdb(_kinterbasdb_numeric, sqltypes.Numeric):
|
|
pass
|
|
|
|
class _FBFloat_kinterbasdb(_kinterbasdb_numeric, sqltypes.Float):
|
|
pass
|
|
|
|
|
|
class FBExecutionContext_kinterbasdb(FBExecutionContext):
|
|
@property
|
|
def rowcount(self):
|
|
if self.execution_options.get('enable_rowcount',
|
|
self.dialect.enable_rowcount):
|
|
return self.cursor.rowcount
|
|
else:
|
|
return -1
|
|
|
|
|
|
class FBDialect_kinterbasdb(FBDialect):
|
|
driver = 'kinterbasdb'
|
|
supports_sane_rowcount = False
|
|
supports_sane_multi_rowcount = False
|
|
execution_ctx_cls = FBExecutionContext_kinterbasdb
|
|
|
|
supports_native_decimal = True
|
|
|
|
colspecs = util.update_copy(
|
|
FBDialect.colspecs,
|
|
{
|
|
sqltypes.Numeric: _FBNumeric_kinterbasdb,
|
|
sqltypes.Float: _FBFloat_kinterbasdb,
|
|
}
|
|
|
|
)
|
|
|
|
def __init__(self, type_conv=200, concurrency_level=1,
|
|
enable_rowcount=True,
|
|
retaining=False, **kwargs):
|
|
super(FBDialect_kinterbasdb, self).__init__(**kwargs)
|
|
self.enable_rowcount = enable_rowcount
|
|
self.type_conv = type_conv
|
|
self.concurrency_level = concurrency_level
|
|
self.retaining = retaining
|
|
if enable_rowcount:
|
|
self.supports_sane_rowcount = True
|
|
|
|
@classmethod
|
|
def dbapi(cls):
|
|
return __import__('kinterbasdb')
|
|
|
|
def do_execute(self, cursor, statement, parameters, context=None):
|
|
# kinterbase does not accept a None, but wants an empty list
|
|
# when there are no arguments.
|
|
cursor.execute(statement, parameters or [])
|
|
|
|
def do_rollback(self, dbapi_connection):
|
|
dbapi_connection.rollback(self.retaining)
|
|
|
|
def do_commit(self, dbapi_connection):
|
|
dbapi_connection.commit(self.retaining)
|
|
|
|
def create_connect_args(self, url):
|
|
opts = url.translate_connect_args(username='user')
|
|
if opts.get('port'):
|
|
opts['host'] = "%s/%s" % (opts['host'], opts['port'])
|
|
del opts['port']
|
|
opts.update(url.query)
|
|
|
|
util.coerce_kw_type(opts, 'type_conv', int)
|
|
|
|
type_conv = opts.pop('type_conv', self.type_conv)
|
|
concurrency_level = opts.pop('concurrency_level',
|
|
self.concurrency_level)
|
|
|
|
if self.dbapi is not None:
|
|
initialized = getattr(self.dbapi, 'initialized', None)
|
|
if initialized is None:
|
|
# CVS rev 1.96 changed the name of the attribute:
|
|
# http://kinterbasdb.cvs.sourceforge.net/viewvc/kinterbasdb/
|
|
# Kinterbasdb-3.0/__init__.py?r1=1.95&r2=1.96
|
|
initialized = getattr(self.dbapi, '_initialized', False)
|
|
if not initialized:
|
|
self.dbapi.init(type_conv=type_conv,
|
|
concurrency_level=concurrency_level)
|
|
return ([], opts)
|
|
|
|
def _get_server_version_info(self, connection):
|
|
"""Get the version of the Firebird server used by a connection.
|
|
|
|
Returns a tuple of (`major`, `minor`, `build`), three integers
|
|
representing the version of the attached server.
|
|
"""
|
|
|
|
# This is the simpler approach (the other uses the services api),
|
|
# that for backward compatibility reasons returns a string like
|
|
# LI-V6.3.3.12981 Firebird 2.0
|
|
# where the first version is a fake one resembling the old
|
|
# Interbase signature.
|
|
|
|
fbconn = connection.connection
|
|
version = fbconn.server_version
|
|
|
|
return self._parse_version_info(version)
|
|
|
|
def _parse_version_info(self, version):
|
|
m = match('\w+-V(\d+)\.(\d+)\.(\d+)\.(\d+)( \w+ (\d+)\.(\d+))?', version)
|
|
if not m:
|
|
raise AssertionError(
|
|
"Could not determine version from string '%s'" % version)
|
|
|
|
if m.group(5) != None:
|
|
return tuple([int(x) for x in m.group(6, 7, 4)] + ['firebird'])
|
|
else:
|
|
return tuple([int(x) for x in m.group(1, 2, 3)] + ['interbase'])
|
|
|
|
def is_disconnect(self, e, connection, cursor):
|
|
if isinstance(e, (self.dbapi.OperationalError,
|
|
self.dbapi.ProgrammingError)):
|
|
msg = str(e)
|
|
return ('Unable to complete network request to host' in msg or
|
|
'Invalid connection state' in msg or
|
|
'Invalid cursor state' in msg or
|
|
'connection shutdown' in msg)
|
|
else:
|
|
return False
|
|
|
|
dialect = FBDialect_kinterbasdb
|