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79 lines
4.7 KiB
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>DB_AUTO_COMMIT</title>
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<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB Upgrade Guide" />
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<link rel="up" href="upgrade_4_4_toc.html" title="Chapter 6. Upgrading Berkeley DB 4.3 applications to Berkeley DB 4.4" />
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<link rel="prev" href="upgrade_4_4_toc.html" title="Chapter 6. Upgrading Berkeley DB 4.3 applications to Berkeley DB 4.4" />
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">DB_AUTO_COMMIT</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="upgrade_4_4_toc.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 6. Upgrading Berkeley DB 4.3 applications to Berkeley DB 4.4</th>
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<td width="20%" align="right"> <a accesskey="n" href="upgrade_4_4_isolation.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="upgrade_4_4_autocommit"></a>DB_AUTO_COMMIT</h2>
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</div>
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</div>
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</div>
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<p>In previous Berkeley DB releases, the <a href="../api_reference/C/envset_flags.html#envset_flags_DB_AUTO_COMMIT" class="olink">DB_AUTO_COMMIT</a> flag was used in
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the C and C++ Berkeley DB APIs to wrap operations within a transaction without
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explicitly creating a transaction and passing the <a href="../api_reference/C/txn.html" class="olink">TXN</a> handle
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as part of the operation method call. In the 4.4 release, the
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<a href="../api_reference/C/envset_flags.html#envset_flags_DB_AUTO_COMMIT" class="olink">DB_AUTO_COMMIT</a> flag no longer needs to be explicitly specified.</p>
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<p>In the 4.4 release, specifying the <a href="../api_reference/C/envset_flags.html#envset_flags_DB_AUTO_COMMIT" class="olink">DB_AUTO_COMMIT</a> flag to the
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<a href="../api_reference/C/envset_flags.html" class="olink">DB_ENV->set_flags()</a> method causes all database modifications in that
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environment to be transactional; specifying <a href="../api_reference/C/envset_flags.html#envset_flags_DB_AUTO_COMMIT" class="olink">DB_AUTO_COMMIT</a> to
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the <a href="../api_reference/C/dbopen.html" class="olink">DB->open()</a> method causes all modifications to that database to be
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transactional; specifying <a href="../api_reference/C/envset_flags.html#envset_flags_DB_AUTO_COMMIT" class="olink">DB_AUTO_COMMIT</a> to the
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<a href="../api_reference/C/envdbremove.html" class="olink">DB_ENV->dbremove()</a> methods causes those
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specific operations to be transactional.</p>
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<p>No related application changes are required for this release, as the
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<a href="../api_reference/C/envset_flags.html#envset_flags_DB_AUTO_COMMIT" class="olink">DB_AUTO_COMMIT</a> flag is ignored where it is no longer needed.
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However, application writers are encouraged to remove uses of the
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<a href="../api_reference/C/envset_flags.html#envset_flags_DB_AUTO_COMMIT" class="olink">DB_AUTO_COMMIT</a> flag in places where it is no longer needed.</p>
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<p>Similar changes have been made to the Berkeley DB Tcl API. These changes are
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not optional, and Tcl applications will need to remove the -auto_commit
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flag from methods where it is no longer needed.</p>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="upgrade_4_4_toc.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="upgrade_4_4_toc.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="upgrade_4_4_isolation.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">Chapter 6. Upgrading Berkeley DB 4.3 applications to Berkeley DB 4.4 </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> DB_DEGREE_2, DB_DIRTY_READ</td>
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</tr>
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</table>
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</div>
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</body>
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