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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <title>About Replication Groups and Updatable Materialized Views</title> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1.1 Build 005" /> <meta name="date" content="2009-06-04T17:1:2Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="About Replication Groups and Updatable Materialized Views" /> <meta name="relnum" content="11g Release 2 (11.2)" /> <meta name="partnum" content="E10703-01" /> <link rel="copyright" href="./dcommon/html/cpyr.htm" title="Copyright" type="text/html" /> <link rel="stylesheet" href="./dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" /> <link rel="contents" href="toc.htm" title="Contents" type="text/html" /> <link rel="prev" href="tdpii_reppit012.htm" title="Previous" type="text/html" /> <link rel="next" href="tdpii_reppit014.htm" title="Next" type="text/html" /> <script src="./callback.js" type="text/javascript"></script> <noscript>Your browser does not support JavaScript. This help page requires JavaScript to render correctly.</noscript> </head> <body> <div class="zz-skip-header"><a href="#BEGIN">Skip Headers</a></div> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr valign="bottom"> <td align="left"></td> <td align="center"><a href="tdpii_reppit012.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdpii_reppit014.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="BEHIGFCF" name="BEHIGFCF"></a><a id="TDPII058" name="TDPII058"></a></p> <div class="sect3"><!-- infolevel="all" infotype="General" --> <h1>About Replication Groups and Updatable Materialized Views<a id="sthref435" name="sthref435"></a><a id="sthref436" name="sthref436"></a><a id="sthref437" name="sthref437"></a><a id="sthref438" name="sthref438"></a><a id="sthref439" name="sthref439"></a></h1> <a name="BEGIN" id="BEGIN"></a> <p>A <span class="bold">replication group</span> is a collection of replication objects that are logically related. Organizing related database objects within a replication group makes it easier to administer many objects together. At a master site, a replication group is called a <span class="bold">master group</span>. At a materialized view site, a replication group is called a <span class="bold">materialized view group</span>.</p> <p>For changes made to an updatable materialized view to be pushed to the master during refresh, the following conditions must be met:</p> <ul> <li> <p>The updatable materialized view must belong to a materialized view group.</p> </li> <li> <p>The materialized view group must be based on a master group at the master site.</p> </li> </ul> <p>The materialized view group can contain materialized views for all of the tables in the master group or for a subset of the tables.</p> <p><a href="#BEHBCAEC">Figure: Materialized View Groups Correspond with Master Groups</a> shows two materialized view groups. Materialized view group A contains materialized views that correspond to a subset of the tables in the master group, while materialized view group B contains a materialized view for each table in the master group.</p> <div class="figure"><a id="BEHBCAEC" name="BEHBCAEC"></a><a id="TDPII285" name="TDPII285"></a> <p class="titleinfigure">Materialized View Groups Correspond with Master Groups</p> <img src="img/tdpii074.gif" alt="Description of this figure follows" title="Description of this figure follows" longdesc="img_text/tdpii074.htm" /><br /> <a id="sthref440" name="sthref440" href="img_text/tdpii074.htm">Description of "Materialized View Groups Correspond with Master Groups"</a><br /> <br /></div> <!-- class="figure" --> <p><a id="sthref441" name="sthref441"></a><a id="sthref442" name="sthref442"></a><a id="sthref443" name="sthref443"></a><a id="sthref444" name="sthref444"></a>If you are using materialized view groups and refresh groups at the same site, then a single refresh group can contain multiple materialized view groups. A materialized view group is not the same as a refresh group, although it can contain the same materialized views.</p> <p><a href="#BEHGGIDF">Figure: Refresh Groups Can Contain Objects from Multiple Materialized View Groups</a> shows a refresh group that contains two materialized view groups.</p> <div class="figure"><a id="BEHGGIDF" name="BEHGGIDF"></a><a id="TDPII286" name="TDPII286"></a> <p class="titleinfigure">Refresh Groups Can Contain Objects from Multiple Materialized View Groups</p> <img src="img/tdpii075.gif" alt="Description of this figure follows" title="Description of this figure follows" longdesc="img_text/tdpii075.htm" /><br /> <a id="sthref445" name="sthref445" href="img_text/tdpii075.htm">Description of "Refresh Groups Can Contain Objects from Multiple Materialized View Groups"</a><br /> <br /></div> <!-- class="figure" --> <div class="helpinfonotealso"> <h2>Related Topics</h2> <p><a href="tdpii_reppit004.htm#BEHBGDFD">About Refresh Groups</a></p> <p><a href="tdpii_reppit016.htm#BEHBDEHH">Configuring Replication of Read/Write Data Using Materialized Views</a></p> <p><a href="tdpii_reppit012.htm#BEHCEEHJ">About Replicating Read/Write Data Using Materialized Views</a></p> </div> </div> <!-- class="sect3" --> <!-- Start Footer --> <div class="footer"> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr> <td align="left"><span class="copyrightlogo">Copyright © 2007, 2009, Oracle and/or its affiliates. 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