<?xml version="1.0" encoding="utf-8"?>+
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->+
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<!-- This component and the accompanying materials are made available under the terms of the License +
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"Eclipse Public License v1.0" which accompanies this distribution, +
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->+
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<!-- Initial Contributors:+
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    Nokia Corporation - initial contribution.+
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Contributors: +
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-->+
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<!DOCTYPE concept+
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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">+
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<concept id="GUID-120163D6-2E49-5D91-A746-2C8C4C944461" xml:lang="en"><title>Incremental+
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operations overview</title><shortdesc>Allows long-running database operations to be performed in steps,+
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so that a user program can remain responsive to other events.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>+
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<section id="GUID-10CCFE47-6AC1-4756-BB03-FE07F589DE1F"><title>Description</title> <p>The+
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API has two key concepts: database incremental operations, and DML statement+
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incremental execution. </p> <p><b>Database incremental operations</b> </p> <p>This+
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allows long-running database operations—table alteration and discard, database+
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compaction and recovery, index creation and discard, DDL (SQL schema update)+
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statement execution—to be performed in incremental steps.</p> <p>While an+
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incremental operation is in progress, the database cannot be used for any+
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other operations such as opening tables or preparing views. Beginning an incremental+
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operation also requires that no rowsets are open on the database, and that+
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no data manipulation transactions are pending a commit. </p> <p>If no explicit+
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transaction has been started by the database, an automatic transaction is+
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begun when any incremental operation is started and is committed when complete,+
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or rolled back if the operation fails or is abandoned prior to completion.</p> <p>Database+
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incremental operations are provided by <xref href="GUID-B07C2FDC-357E-31F8-B67E-0A252EEF2187.dita"><apiname>RDbIncremental</apiname></xref>.</p> <p><b>DML+
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statement incremental execution</b> </p> <p>A class is provided, similar to <xref href="GUID-B07C2FDC-357E-31F8-B67E-0A252EEF2187.dita"><apiname>RDbIncremental</apiname></xref>,+
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for performing DML (SQL data update) statements incrementally. This is <xref href="GUID-B9D43EA2-F1F1-3830-A16A-F73F06C2BB3D.dita"><apiname>RDbUpdate</apiname></xref>.</p> </section>+
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</conbody></concept>+
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