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opt
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cloudlinux
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venv
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lib64
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python3.11
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site-packages
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sqlalchemy
/
dialects
/
sybase
/ [
drwxr-xr-x
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pysybase.py
# sybase/pysybase.py # Copyright (C) 2010-2021 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:: sybase+pysybase :name: Python-Sybase :dbapi: Sybase :connectstring: sybase+pysybase://<username>:<password>@<dsn>/[database name] :url: http://python-sybase.sourceforge.net/ Unicode Support --------------- The python-sybase driver does not appear to support non-ASCII strings of any kind at this time. """ # noqa from sqlalchemy import processors from sqlalchemy import types as sqltypes from sqlalchemy.dialects.sybase.base import SybaseDialect from sqlalchemy.dialects.sybase.base import SybaseExecutionContext from sqlalchemy.dialects.sybase.base import SybaseSQLCompiler class _SybNumeric(sqltypes.Numeric): def result_processor(self, dialect, type_): if not self.asdecimal: return processors.to_float else: return sqltypes.Numeric.result_processor(self, dialect, type_) class SybaseExecutionContext_pysybase(SybaseExecutionContext): def set_ddl_autocommit(self, dbapi_connection, value): if value: # call commit() on the Sybase connection directly, # to avoid any side effects of calling a Connection # transactional method inside of pre_exec() dbapi_connection.commit() def pre_exec(self): SybaseExecutionContext.pre_exec(self) for param in self.parameters: for key in list(param): param["@" + key] = param[key] del param[key] class SybaseSQLCompiler_pysybase(SybaseSQLCompiler): def bindparam_string(self, name, **kw): return "@" + name class SybaseDialect_pysybase(SybaseDialect): driver = "pysybase" execution_ctx_cls = SybaseExecutionContext_pysybase statement_compiler = SybaseSQLCompiler_pysybase colspecs = {sqltypes.Numeric: _SybNumeric, sqltypes.Float: sqltypes.Float} @classmethod def dbapi(cls): import Sybase return Sybase def create_connect_args(self, url): opts = url.translate_connect_args(username="user", password="passwd") return ([opts.pop("host")], opts) def do_executemany(self, cursor, statement, parameters, context=None): # calling python-sybase executemany yields: # TypeError: string too long for buffer for param in parameters: cursor.execute(statement, param) def _get_server_version_info(self, connection): vers = connection.scalar("select @@version_number") # i.e. 15500, 15000, 12500 == (15, 5, 0, 0), (15, 0, 0, 0), # (12, 5, 0, 0) return (vers / 1000, vers % 1000 / 100, vers % 100 / 10, vers % 10) 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 ) else: return False dialect = SybaseDialect_pysybase
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