77 lines
4.7 KiB
HTML
77 lines
4.7 KiB
HTML
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<!DOCTYPE html
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<meta name="DC.Title" content="Activation group connection states" />
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<meta name="abstract" content="A different application server can be established by the explicit or implicit execution of a CONNECT statement." />
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<meta name="description" content="A different application server can be established by the explicit or implicit execution of a CONNECT statement." />
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<meta name="DC.subject" content="connection states, activation group, connected state, unconnected state" />
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<meta name="keywords" content="connection states, activation group, connected state, unconnected state" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Activation group connection states</title>
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</head>
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<body id="rbal1actstates"><a name="rbal1actstates"><!-- --></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">Activation group connection states</h1>
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<div><p>A different application server can be established by the explicit
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or implicit execution of a CONNECT statement.</p>
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<div class="section"><p>The following rules apply: </p>
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<ul><li>An activation group cannot have more than one connection to the same application
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server at the same time.</li>
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<li>When an activation group executes a SET CONNECTION statement, the specified
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location name must be an existing connection in the set of connections of
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the activation group.</li>
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<li>When an activation group executes a CONNECT statement, the specified server
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name must not be an existing connection in the set of connections of the activation
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group.</li>
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</ul>
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</div>
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<div class="section"><p><strong>If an activation group has a current connection</strong>, the activation
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group is in the <em>connected</em> state. </p>
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</div>
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<div class="section"><p>The CURRENT SERVER special register contains the name of the application
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server of the current connection. The activation group can execute SQL statements
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that refer to objects managed by that application server.</p>
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</div>
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<div class="section"><p>An activation group in the unconnected state enters the connected
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state when it successfully executes a CONNECT or SET CONNECTION statement.</p>
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</div>
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<div class="section"><p><strong>If an activation group does not have a current connection</strong>,
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the activation group is in the <em>unconnected</em> state. The CURRENT SERVER
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special register contents are equal to blanks. The only SQL statements that
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can be executed are CONNECT, DISCONNECT, SET CONNECTION, RELEASE, COMMIT,
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and ROLLBACK.</p>
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</div>
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<div class="section"><p>An activation group in the connected state enters the unconnected
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state when its current connection is intentionally ended or the execution
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of an SQL statement is unsuccessful because of a failure that causes a rollback
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operation at the application server and loss of the connection. Connections
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are intentionally ended when an activation group successfully executes a commit
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operation and the connection is in the released state, or when an application
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process successfully executes the DISCONNECT statement.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbal1adduwmg.htm" title="The application-directed distributed unit of work facility also provides for the remote preparation and execution of SQL statements in the same fashion as remote unit of work.">Distributed unit of work</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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