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# postgresql/pygresql.py
# Copyright (C) 2005-2015 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:: postgresql+pygresql
:name: py-pygresql
:dbapi: pygresql
:connectstring: postgresql+pygresql://user:password@host:port/dbname\
[?key=value&key=value...]
:url: http://python.projects.pgfoundry.org/
"""
from ... import util
from ... import types as sqltypes
from .base import PGDialect, PGExecutionContext
from ... import processors
class PGNumeric(sqltypes.Numeric):
def bind_processor(self, dialect):
return processors.to_str
def result_processor(self, dialect, coltype):
if self.asdecimal:
return None
else:
return processors.to_float
class PGExecutionContext_pygresql(PGExecutionContext):
pass
class PGDialect_pygresql(PGDialect):
driver = 'pygresql'
supports_unicode_statements = True
supports_unicode_binds = True
description_encoding = None
default_paramstyle = 'pyformat'
# requires trunk version to support sane rowcounts
# TODO: use dbapi version information to set this flag appropriately
supports_sane_rowcount = True
supports_sane_multi_rowcount = False
execution_ctx_cls = PGExecutionContext_pygresql
colspecs = util.update_copy(
PGDialect.colspecs,
{
sqltypes.Numeric: PGNumeric,
# prevents PGNumeric from being used
sqltypes.Float: sqltypes.Float,
}
)
@classmethod
def dbapi(cls):
import pgdb
return pgdb
def create_connect_args(self, url):
opts = url.translate_connect_args(username='user')
if 'port' in opts:
opts['host'] = ":".join((opts['host'],str(opts.pop('port'))))
opts.pop('port',None)
opts.update(url.query)
return ([], opts)
def is_disconnect(self, e, connection, cursor):
return "connection is closed" in str(e)
dialect = PGDialect_pygresql
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