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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2މ$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ# Copyright (c) 2025, 2026, Oracle and/or its affiliates. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License, version 2.0, as # published by the Free Software Foundation. # # This program is designed to work with certain software (including # but not limited to OpenSSL) that is licensed under separate terms, # as designated in a particular file or component or in included license # documentation. The authors of MySQL hereby grant you an # additional permission to link the program and your derivative works # with the separately licensed software that they have either included with # the program or referenced in the documentation. # # Without limiting anything contained in the foregoing, this file, # which is part of MySQL Connector/Python, is also subject to the # Universal FOSS Exception, version 1.0, a copy of which can be found at # http://oss.oracle.com/licenses/universal-foss-exception. # # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # See the GNU General Public License, version 2.0, for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software Foundation, Inc., # 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA """Atomic transaction context manager utilities for MySQL Connector/Python. Provides context manager atomic_transaction() that ensures commit on success and rollback on error without obscuring the original exception. """ from contextlib import contextmanager from typing import Iterator from mysql.connector.abstracts import MySQLConnectionAbstract from mysql.connector.cursor import MySQLCursorAbstract @contextmanager def atomic_transaction( conn: MySQLConnectionAbstract, ) -> Iterator[MySQLCursorAbstract]: """ Context manager that wraps a MySQL database cursor and ensures transaction rollback in case of exception. NOTE: DDL statements such as CREATE TABLE cause implicit commits. These cannot be managed by a cursor object. Changes made at or before a DDL statement will be committed and not rolled back. Callers are responsible for any cleanup of this type. This class acts as a robust, PEP 343-compliant context manager for handling database cursor operations on a MySQL connection. It ensures that all operations executed within the context block are part of the same transaction, and automatically calls `connection.rollback()` if an exception occurs, helping to maintain database integrity. On normal completion (no exception), it simply closes the cursor after use. Exceptions are always propagated to the caller. Args: conn: A MySQLConnectionAbstract instance. """ old_autocommit = conn.autocommit cursor = conn.cursor() exception_raised = False try: if old_autocommit: conn.autocommit = False yield cursor # provide cursor to block conn.commit() except Exception: # pylint: disable=broad-exception-caught exception_raised = True try: conn.rollback() except Exception: # pylint: disable=broad-exception-caught # Don't obscure original exception pass # Raise original exception raise finally: conn.autocommit = old_autocommit try: cursor.close() except Exception: # pylint: disable=broad-exception-caught # don't obscure original exception if exists if not exception_raised: raise