67 lines
3.9 KiB
HTML
67 lines
3.9 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Run DB2 UDB CLI in server mode" />
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<meta name="abstract" content="This topic is about why and how you should run your DB2 UDB CLI applications in server mode." />
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<meta name="description" content="This topic is about why and how you should run your DB2 UDB CLI applications in server mode." />
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<meta name="DC.Relation" scheme="URI" content="rzadpkickoff.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzadpstartingservermode.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzadprestrictions.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1999, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1999, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzadpsqlapd" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Run DB2 UDB
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CLI in server mode</title>
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</head>
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<body id="rzadpsqlapd"><a name="rzadpsqlapd"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Run DB2 UDB
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CLI in server mode</h1>
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<div><p>This topic is about why and how you should run your DB2<sup>®</sup> UDB CLI applications
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in server mode.</p>
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<div class="p">The reason for running in SQL server mode is that many applications have
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the need to act as database servers. This means that a single job performs
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SQL requests on behalf of multiple users. Without using SQL server mode, applications
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might encounter one or more of the following three limitations: <ol><li>A single job can only have one commit transaction per activation group.</li>
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<li>A single job can only connect to an RDB once.</li>
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<li>All SQL statements run under the job's user profile, regardless of the
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user ID passed in on the connect.</li>
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</ol>
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</div>
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<p>SQL server mode circumvents these limitations by routing all SQL statements
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to separate jobs. Each connection runs in its own job. The system uses prestart
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jobs in the QSYSWRK subsystem to minimize the startup time for each connection.
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Because each call to SQLConnect can accept a different user profile, each
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job also has its own commit transaction. As soon as the SQLDisconnect has
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been performed, the job is reset and put back in the pool of
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available jobs.</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzadpstartingservermode.htm">Start DB2 UDB CLI in SQL server mode</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="rzadprestrictions.htm">Restrictions for running DB2 UDB CLI in server mode</a></strong><br />
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</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzadpkickoff.htm" title="DB2 UDB call level interface (CLI) is a callable Structured Query Language (SQL) programming interface that is supported in all DB2 environments except for DB2 Universal Database for z/OS and DB2 Server for VSE and VM.">SQL call level interface</a></div>
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</div>
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</div>
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</body>
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</html>
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