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