Oraclr

Páginas: 12 (2829 palabras) Publicado: 13 de julio de 2012
Explain This! Understanding Oracle Explain Plans
Exploring the World of Oracle Explain Plans
Jeff Smith, Solutions Architect for Quest Software
Written by

WHITE PAPER

© 2010 Quest Software, Inc. ALL RIGHTS RESERVED. This document contains proprietary information protected by copyright. No part of this document may be reproduced or transmitted in any form or by any means, electronicor mechanical, including photocopying and recording for any purpose without the written permission of Quest Software, Inc. (―Quest‖). The information in this document is provided in connection with Quest products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Quest products. EXCEPT ASSET FORTH IN QUEST'S TERMS AND CONDITIONS AS SPECIFIED IN THE LICENSE AGREEMENT FOR THIS PRODUCT, QUEST ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NONINFRINGEMENT. IN NO EVENT SHALL QUEST BE LIABLE FOR ANY DIRECT,INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF QUEST HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Quest makes no representations or warranties with respect to the accuracy or completeness of thecontents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. Quest does not make any commitment to update the information contained in this document. If you have any questions regarding your potential use of this material, contact: Quest Software World Headquarters LEGAL Dept 5 Polaris Way Aliso Viejo, CA 92656www.quest.com E-mail: legal@quest.com Refer to our Web site for regional and international office information.

Trademarks
Quest, Quest Software, the Quest Software logo, AccessManager, ActiveRoles, Aelita, Akonix, AppAssure, Benchmark Factory, Big Brother, BridgeAccess, BridgeAutoEscalate, BridgeSearch, BridgeTrak, BusinessInsight, ChangeAuditor, ChangeManager, Defender, DeployDirector, DesktopAuthority, DirectoryAnalyzer, DirectoryTroubleshooter, DS Analyzer, DS Expert, Foglight, GPOADmin, Help Desk Authority, Imceda, IntelliProfile, InTrust, Invirtus, iToken, I/Watch, JClass, Jint, JProbe, LeccoTech, LiteSpeed, LiveReorg, LogADmin, MessageStats, Monosphere, MultSess, NBSpool, NetBase, NetControl, Npulse, NetPro, PassGo, PerformaSure, Point,Click,Done!, PowerGUI, Quest Central,Quest vToolkit, Quest vWorkSpace, ReportADmin, RestoreADmin, ScriptLogic, Security Lifecycle Map, SelfServiceADmin, SharePlex, Sitraka, SmartAlarm, Spotlight, SQL Navigator, SQL Watch, SQLab, Stat, StealthCollect, Storage Horizon, Tag and Follow, Toad, T.O.A.D., Toad World, vAutomator, vControl, vConverter, vFoglight, vOptimizer, vRanger, Vintela, Virtual DBA, VizionCore, Vizioncore vAutomationSuite, Vizioncore vBackup, Vizioncore vEssentials, Vizioncore vMigrator, Vizioncore vReplicator, WebDefender, Webthority, Xaffire, and XRT are trademarks and registered trademarks of Quest Software, Inc in the United States of America and other countries. Other trademarks and registered trademarks used in this guide are property of their respective owners.

White Paper: Explain This!Understanding Oracle Explain Plans

1

Contents
Introduction.................................................................................................................................................... 3 Understanding Execution Plans .................................................................................................................... 4 The Importance of Execution Plans...
Leer documento completo

Regístrate para leer el documento completo.

Conviértase en miembro formal de Buenas Tareas

INSCRÍBETE - ES GRATIS