Adding upstream version 2.4.57.upstream/2.4.57

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-07 15:01:30 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-07 15:01:30 +0000
commit: 6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch)
tree: 1ce8673d4aaa948e5554000101f46536a1e4cc29 /docs/manual/mod/mod_session_dbd.html.en
parent: Initial commit. (diff)
download: apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.tar.xz
apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.zip
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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head>
+<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" />
+<!--
+        XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+              This file is generated from xml source: DO NOT EDIT
+        XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+      -->
+<title>mod_session_dbd - Apache HTTP Server Version 2.4</title>
+<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
+<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
+<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" />
+<script src="../style/scripts/prettify.min.js" type="text/javascript">
+</script>
+
+<link href="../images/favicon.ico" rel="shortcut icon" /></head>
+<body>
+<div id="page-header">
+<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
+<p class="apache">Apache HTTP Server Version 2.4</p>
+<img alt="" src="../images/feather.png" /></div>
+<div class="up"><a href="./"><img title="&lt;-" alt="&lt;-" src="../images/left.gif" /></a></div>
+<div id="path">
+<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.4</a> &gt; <a href="./">Modules</a></div>
+<div id="page-content">
+<div id="preamble"><h1>Apache Module mod_session_dbd</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_session_dbd.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_session_dbd.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a></p>
+</div>
+<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>DBD/SQL based session support</td></tr>
+<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>session_dbd_module</td></tr>
+<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_session_dbd.c</td></tr>
+<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3 and later</td></tr></table>
+<h3>Summary</h3>
+
+    <div class="warning"><h3>Warning</h3>
+      <p>The session modules make use of HTTP cookies, and as such can fall
+      victim to Cross Site Scripting attacks, or expose potentially private
+      information to clients. Please ensure that the relevant risks have
+      been taken into account before enabling the session functionality on
+      your server.</p>
+    </div>
+
+    <p>This submodule of <code class="module"><a href="../mod/mod_session.html">mod_session</a></code> provides support for the
+    storage of user sessions within a SQL database using the
+    <code class="module"><a href="../mod/mod_dbd.html">mod_dbd</a></code> module.</p>
+
+    <p>Sessions can either be <strong>anonymous</strong>, where the session is
+    keyed by a unique UUID string stored on the browser in a cookie, or
+    <strong>per user</strong>, where the session is keyed against the userid of
+    the logged in user.</p>
+
+    <p>SQL based sessions are hidden from the browser, and so offer a measure of
+    privacy without the need for encryption.</p>
+
+    <p>Different webservers within a server farm may choose to share a database,
+    and so share sessions with one another.</p>
+
+    <p>For more details on the session interface, see the documentation for
+    the <code class="module"><a href="../mod/mod_session.html">mod_session</a></code> module.</p>
+
+</div>
+<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3>Topics</h3>
+<ul id="topics">
+<li><img alt="" src="../images/down.gif" /> <a href="#dbdconfig">DBD Configuration</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#anonymous">Anonymous Sessions</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#peruser">Per User Sessions</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#housekeeping">Database Housekeeping</a></li>
+</ul><h3 class="directives">Directives</h3>
+<ul id="toc">
+<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdcookiename">SessionDBDCookieName</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdcookiename2">SessionDBDCookieName2</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdcookieremove">SessionDBDCookieRemove</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbddeletelabel">SessionDBDDeleteLabel</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdinsertlabel">SessionDBDInsertLabel</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdperuser">SessionDBDPerUser</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdselectlabel">SessionDBDSelectLabel</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdupdatelabel">SessionDBDUpdateLabel</a></li>
+</ul>
+<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_session_dbd">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_session_dbd">Report a bug</a></li></ul><h3>See also</h3>
+<ul class="seealso">
+<li><code class="module"><a href="../mod/mod_session.html">mod_session</a></code></li>
+<li><code class="module"><a href="../mod/mod_session_crypto.html">mod_session_crypto</a></code></li>
+<li><code class="module"><a href="../mod/mod_session_cookie.html">mod_session_cookie</a></code></li>
+<li><code class="module"><a href="../mod/mod_dbd.html">mod_dbd</a></code></li>
+<li><a href="#comments_section">Comments</a></li></ul></div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="dbdconfig" id="dbdconfig">DBD Configuration</a></h2>
+
+      <p>Before the <code class="module"><a href="../mod/mod_session_dbd.html">mod_session_dbd</a></code> module can be configured to maintain a
+      session, the <code class="module"><a href="../mod/mod_dbd.html">mod_dbd</a></code> module must be configured to make the various database queries
+      available to the server.</p>
+
+      <p>There are four queries required to keep a session maintained, to select an existing session,
+      to update an existing session, to insert a new session, and to delete an expired or empty
+      session. These queries are configured as per the example below.</p>
+
+      <div class="example"><h3>Sample DBD configuration</h3><pre class="prettyprint lang-config">DBDriver pgsql
+DBDParams "dbname=apachesession user=apache password=xxxxx host=localhost"
+DBDPrepareSQL "delete from session where key = %s" deletesession
+DBDPrepareSQL "update session set value = %s, expiry = %lld, key = %s where key = %s" updatesession
+DBDPrepareSQL "insert into session (value, expiry, key) values (%s, %lld, %s)" insertsession
+DBDPrepareSQL "select value from session where key = %s and (expiry = 0 or expiry &gt; %lld)" selectsession
+DBDPrepareSQL "delete from session where expiry != 0 and expiry &lt; %lld" cleansession</pre>
+</div>
+
+    </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="anonymous" id="anonymous">Anonymous Sessions</a></h2>
+
+      <p>Anonymous sessions are keyed against a unique UUID, and stored on the
+      browser within an HTTP cookie. This method is similar to that used by most
+      application servers to store session information.</p>
+
+      <p>To create a simple anonymous session and store it in a postgres database
+      table called <var>apachesession</var>, and save the session ID in a cookie
+      called <var>session</var>, configure the session as follows:</p>
+
+      <div class="example"><h3>SQL based anonymous session</h3><pre class="prettyprint lang-config">Session On
+SessionDBDCookieName session path=/</pre>
+</div>
+
+      <p>For more examples on how the session can be configured to be read
+      from and written to by a CGI application, see the
+      <code class="module"><a href="../mod/mod_session.html">mod_session</a></code> examples section.</p>
+
+      <p>For documentation on how the session can be used to store username
+      and password details, see the <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code> module.</p>
+
+    </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="peruser" id="peruser">Per User Sessions</a></h2>
+
+      <p>Per user sessions are keyed against the username of a successfully
+      authenticated user. It offers the most privacy, as no external handle
+      to the session exists outside of the authenticated realm.</p>
+
+      <p>Per user sessions work within a correctly configured authenticated
+      environment, be that using basic authentication, digest authentication
+      or SSL client certificates. Due to the limitations of who came first,
+      the chicken or the egg, per user sessions cannot be used to store
+      authentication credentials from a module like
+      <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code>.</p>
+
+      <p>To create a simple per user session and store it in a postgres database
+      table called <var>apachesession</var>, and with the session keyed to the
+      userid, configure the session as follows:</p>
+
+      <div class="example"><h3>SQL based per user session</h3><pre class="prettyprint lang-config">Session On
+SessionDBDPerUser On</pre>
+</div>
+
+    </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="housekeeping" id="housekeeping">Database Housekeeping</a></h2>
+      <p>Over the course of time, the database can be expected to start accumulating
+      expired sessions. At this point, the <code class="module"><a href="../mod/mod_session_dbd.html">mod_session_dbd</a></code> module
+      is not yet able to handle session expiry automatically.</p>
+
+      <div class="warning"><h3>Warning</h3>
+      <p>The administrator will need to set up an external process via cron to clean
+      out expired sessions.</p>
+      </div>
+
+    </div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="SessionDBDCookieName" id="SessionDBDCookieName">SessionDBDCookieName</a> <a name="sessiondbdcookiename" id="sessiondbdcookiename">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Name and attributes for the RFC2109 cookie storing the session ID</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDCookieName <var>name</var> <var>attributes</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr>
+</table>
+    <p>The <code class="directive">SessionDBDCookieName</code> directive specifies the name and
+    optional attributes of an RFC2109 compliant cookie inside which the session ID will
+    be stored. RFC2109 cookies are set using the <code>Set-Cookie</code> HTTP header.
+    </p>
+
+    <p>An optional list of cookie attributes can be specified, as per the example below.
+    These attributes are inserted into the cookie as is, and are not interpreted by
+    Apache. Ensure that your attributes are defined correctly as per the cookie specification.
+    </p>
+
+    <div class="example"><h3>Cookie with attributes</h3><pre class="prettyprint lang-config">Session On
+SessionDBDCookieName session path=/private;domain=example.com;httponly;secure;version=1;</pre>
+</div>
+
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="SessionDBDCookieName2" id="SessionDBDCookieName2">SessionDBDCookieName2</a> <a name="sessiondbdcookiename2" id="sessiondbdcookiename2">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Name and attributes for the RFC2965 cookie storing the session ID</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDCookieName2 <var>name</var> <var>attributes</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr>
+</table>
+    <p>The <code class="directive">SessionDBDCookieName2</code> directive specifies the name and
+    optional attributes of an RFC2965 compliant cookie inside which the session ID will
+    be stored. RFC2965 cookies are set using the <code>Set-Cookie2</code> HTTP header.
+    </p>
+
+    <p>An optional list of cookie attributes can be specified, as per the example below.
+    These attributes are inserted into the cookie as is, and are not interpreted by
+    Apache. Ensure that your attributes are defined correctly as per the cookie specification.
+    </p>
+
+    <div class="example"><h3>Cookie2 with attributes</h3><pre class="prettyprint lang-config">Session On
+SessionDBDCookieName2 session path=/private;domain=example.com;httponly;secure;version=1;</pre>
+</div>
+
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="SessionDBDCookieRemove" id="SessionDBDCookieRemove">SessionDBDCookieRemove</a> <a name="sessiondbdcookieremove" id="sessiondbdcookieremove">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Control for whether session ID cookies should be removed from incoming HTTP headers</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDCookieRemove On|Off</code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDCookieRemove On</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr>
+</table>
+    <p>The <code class="directive">SessionDBDCookieRemove</code> flag controls whether the cookies
+    containing the session ID will be removed from the headers during request processing.</p>
+
+    <p>In a reverse proxy situation where the Apache server acts as a server frontend for
+    a backend origin server, revealing the contents of the session ID cookie to the backend
+    could be a potential privacy violation. When set to on, the session ID cookie will be
+    removed from the incoming HTTP headers.</p>
+
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="SessionDBDDeleteLabel" id="SessionDBDDeleteLabel">SessionDBDDeleteLabel</a> <a name="sessiondbddeletelabel" id="sessiondbddeletelabel">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The SQL query to use to remove sessions from the database</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDDeleteLabel <var>label</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDDeleteLabel deletesession</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr>
+</table>
+    <p>The <code class="directive">SessionDBDDeleteLabel</code> directive sets the default delete
+    query label to be used to delete an expired or empty session. This label must have been previously
+    defined using the <code class="directive"><a href="../mod/mod_dbd.html#dbdpreparesql">DBDPrepareSQL</a></code> directive.</p>
+
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="SessionDBDInsertLabel" id="SessionDBDInsertLabel">SessionDBDInsertLabel</a> <a name="sessiondbdinsertlabel" id="sessiondbdinsertlabel">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The SQL query to use to insert sessions into the database</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDInsertLabel <var>label</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDInsertLabel insertsession</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr>
+</table>
+    <p>The <code class="directive">SessionDBDInsertLabel</code> directive sets the default insert
+    query label to be used to load in a session. This label must have been previously defined using the
+    <code class="directive"><a href="../mod/mod_dbd.html#dbdpreparesql">DBDPrepareSQL</a></code> directive.</p>
+
+    <p>If an attempt to update the session affects no rows, this query will be called to insert the
+    session into the database.</p>
+
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="SessionDBDPerUser" id="SessionDBDPerUser">SessionDBDPerUser</a> <a name="sessiondbdperuser" id="sessiondbdperuser">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable a per user session</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDPerUser On|Off</code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDPerUser Off</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr>
+</table>
+    <p>The <code class="directive">SessionDBDPerUser</code> flag enables a per user session keyed
+    against the user's login name. If the user is not logged in, this directive will be
+    ignored.</p>
+
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="SessionDBDSelectLabel" id="SessionDBDSelectLabel">SessionDBDSelectLabel</a> <a name="sessiondbdselectlabel" id="sessiondbdselectlabel">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The SQL query to use to select sessions from the database</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDSelectLabel <var>label</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDSelectLabel selectsession</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr>
+</table>
+    <p>The <code class="directive">SessionDBDSelectLabel</code> directive sets the default select
+    query label to be used to load in a session. This label must have been previously defined using the
+    <code class="directive"><a href="../mod/mod_dbd.html#dbdpreparesql">DBDPrepareSQL</a></code> directive.</p>
+
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="SessionDBDUpdateLabel" id="SessionDBDUpdateLabel">SessionDBDUpdateLabel</a> <a name="sessiondbdupdatelabel" id="sessiondbdupdatelabel">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The SQL query to use to update existing sessions in the database</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDUpdateLabel <var>label</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDUpdateLabel updatesession</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr>
+</table>
+    <p>The <code class="directive">SessionDBDUpdateLabel</code> directive sets the default update
+    query label to be used to load in a session. This label must have been previously defined using the
+    <code class="directive"><a href="../mod/mod_dbd.html#dbdpreparesql">DBDPrepareSQL</a></code> directive.</p>
+
+    <p>If an attempt to update the session affects no rows, the insert query will be
+    called to insert the session into the database. If the database supports InsertOrUpdate,
+    override this query to perform the update in one query instead of two.</p>
+
+
+</div>
+</div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_session_dbd.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_session_dbd.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a></p>
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+\ No newline at end of file
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-07 15:01:30 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-07 15:01:30 +0000
commit	6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch)
tree	1ce8673d4aaa948e5554000101f46536a1e4cc29 /docs/manual/mod/mod_session_dbd.html.en
parent	Initial commit. (diff)
download	apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.tar.xz apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.zip