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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef __com_sun_star_sdbc_TransactionIsolation_idl__
#define __com_sun_star_sdbc_TransactionIsolation_idl__
module com { module sun { module star { module sdbc {
/** distinguishes different possible transaction isolation levels.
*/
published constants TransactionIsolation
{
/** indicates that transactions are not supported.
*/
const long NONE = 0;
/** Dirty reads, non-repeatable reads and phantom reads can occur.
This level allows a row changed by one transaction to be read
by another transaction before any changes in that row have been
committed (a "dirty read"). If any of the changes are rolled back,
the second transaction will have retrieved an invalid row.
*/
const long READ_UNCOMMITTED = 1;
/** Dirty reads are prevented; non-repeatable reads and phantom
reads can occur. This level only prohibits a transaction
from reading a row with uncommitted changes in it.
*/
const long READ_COMMITTED = 2;
/** Dirty reads and non-repeatable reads are prevented; phantom
reads can occur. This level prohibits a transaction from
reading a row with uncommitted changes in it, and it also
prohibits the situation where one transaction reads a row,
a second transaction alters the row, and the first transaction
rereads the row, getting different values the second time
(a "non-repeatable read").
*/
const long REPEATABLE_READ = 4;
/** Dirty reads, non-repeatable reads and phantom reads are prevented.
This level includes the prohibitions in
<code>REPEATABLE_READ</code>
and further prohibits the
situation where one transaction reads all rows that satisfy
a WHERE condition, a second transaction inserts a row that
satisfies that WHERE condition, and the first transaction
rereads for the same condition, retrieving the additional
"phantom" row in the second read.
*/
const long SERIALIZABLE = 8;
};
}; }; }; };
/*===========================================================================
===========================================================================*/
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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