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<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xml:lang="en" lang="en" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html;charset=utf-8" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <!-- MOTW-DISABLED saved from url=(0014)about:internet --> <title>Transactions</title> <link rel="StyleSheet" href="css/btrieve.css" type="text/css" media="all" /> <link rel="StyleSheet" href="css/webworks.css" type="text/css" media="all" /> <script type="text/javascript" language="JavaScript1.2" src="wwhdata/common/context.js"></script> <script type="text/javascript" language="JavaScript1.2" src="wwhdata/common/towwhdir.js"></script> <script type="text/javascript" language="JavaScript1.2" src="wwhdata/common/wwhpagef.js"></script> <script type="text/javascript" language="JavaScript1.2"> <!-- var WebWorksRootPath = ""; // --> </script> <script type="text/javascript" language="JavaScript1.2"> <!-- // Set reference to top level help frame // var WWHFrame = WWHGetWWHFrame("", true); // --> </script> <script type="text/javascript" language="JavaScript1.2" src="scripts/expand.js"></script> </head> <body class="" style="background-color: #FFFFEE;" onload="WWHUpdate();" onunload="WWHUnload();" onkeydown="WWHHandleKeyDown((document.all||document.getElementById||document.layers)?event:null);" onkeypress="WWHHandleKeyPress((document.all||document.getElementById||document.layers)?event:null);" onkeyup="WWHHandleKeyUp((document.all||document.getElementById||document.layers)?event:null);"> <br /> <div class="WebWorks_Breadcrumbs" style="text-align: left;"> <a class="WebWorks_Breadcrumb_Link" href="btrieve.20.01.html#106256">15 The Btrieve (Pervasive.SQL) Driver</a> : Transactions</div> <hr align="left" /> <blockquote> <div class="head_1"><a name="106256">Transactions</a></div> <div class="Body"><a name="106257">The Btrieve driver supports </a><span class="Emphasis">transactions</span>. A transaction is a series of database changes that is treated as a single unit. In applications that so not use transactions, the Btrieve driver immediately executes Insert, Update, and Delete statements on the database files and the changes are automatically committed when the SQL statement is executed. You cannot undo these changes. In applications that use transactions, the Btrieve driver holds inserts, updates, and deletes until you issue a Commit or Rollback. A Commit saves the changes to the database file; a Rollback undoes the changes.</div> <div class="Body"><a name="106258">Transactions affect the removal of record locking. All locks are removed when SQLTransact </a>is called with the Commit or Rollback option to end the active transaction.</div> <div class="Body"><a name="106259">To use the Btrieve driverâ??s transaction processing capabilities, consult the Pervasive </a>documentation.</div> <script type="text/javascript" language="JavaScript1.2"> <!-- // Clear related topics // WWHClearRelatedTopics(); document.writeln(WWHRelatedTopicsInlineHTML()); // --> </script> </blockquote> <script type="text/javascript" language="JavaScript1.2"> <!-- document.write(WWHRelatedTopicsDivTag() + WWHPopupDivTag() + WWHALinksDivTag()); // --> </script> </body> </html>
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