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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>Minimum Communication</title> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1" /> <meta name="date" content="2009-04-23T10:13:6Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="Minimum Communication" /> <meta name="relnum" content="11g Release 1 (11.1)" /> <meta name="partnum" content="A12345-01" /> <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="newglossary006.htm" title="Previous" type="text/html" /> <link rel="next" href="newglossary008.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> <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="newglossary006.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="newglossary008.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="BGBJCDEJ" name="BGBJCDEJ"></a><a id="ADVRP364" name="ADVRP364"></a></p> <div class="sect1"><!-- infolevel="all" infotype="General" --> <h1>Minimum Communication</h1> <p>When you create a replicated table, you can choose to minimize the amount of data that must be communicated to determine conflicts for each changed row in the table by enabling the minimum communication feature.</p> <p>During an update, Oracle sends the following when you have enabled the minimum communication option:</p> <ul> <li> <p>Primary key values</p> </li> <li> <p>Old values for the modified column group</p> </li> <li> <p>Nulls for old values not in the primary key and the modified column group</p> </li> <li> <p>Null for new values for all columns not updated</p> </li> <li> <p>Actual new values for updated columns</p> </li> </ul> <p>If minimum communication is disabled, then the entire contents of the updated row are sent.</p> <div class="helpinfonotealso"> <h2>Related Topics</h2> <p><a href="multimaster014.htm#BGBHEIIB">Altering Objects in a Master Group</a></p> <p><a href="materialized004.htm#BEICAGEF">Create Materialized View Group: Overview</a></p> <p><a href="materialized008.htm#BEIJCIAJ">Editing a Materialized View</a></p> </div> </div> <!-- class="sect1" --> <!-- 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 © 2005, 2009, Oracle and/or its affiliates. All rights reserved.</span><br /> <a href="./dcommon/html/cpyr.htm"><span class="copyrightlogo">Legal Notices</span></a></td> <td align="center"><a href="newglossary006.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="newglossary008.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> </div> <!-- class="footer" --> </body> </html>
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