61 lines
4.0 KiB
HTML
61 lines
4.0 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="Trigger and application programs that are under commitment control" />
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<meta name="abstract" content="This topic describes the conditions when trigger and application programs are under commitment control." />
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<meta name="description" content="This topic describes the conditions when trigger and application programs are under commitment control." />
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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="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Trigger and application programs that are under commitment control</title>
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</head>
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<body id="rbaforzahftrf"><a name="rbaforzahftrf"><!-- --></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">Trigger and application programs that are under commitment control</h1>
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<div><p>This topic describes the conditions when trigger and application
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programs are under commitment control.</p>
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<p>When the trigger program and the application program run under the same
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commitment definition, a failure of the trigger program causes the rollback
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of all statements that are associated with the trigger program. This includes
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any statement in a nested trigger program. The originating change operation
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also rolls back. This requires the trigger program to signal an exception
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when it encounters an error.</p>
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<p>When the trigger program and the application program run under different
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commitment definitions, the COMMIT statements in the application program only
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affect its own commitment definition. The programmer must commit the changes
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in the trigger program by issuing the COMMIT statement.</p>
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<p>When insert or update record operations are performed under commitment
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control, the detection of any specific duplicate key errors is deferred until
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the logical end of the operation, to allow for the possibility that such errors
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have been resolved by that time. In the case of a trigger program running
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in the same commitment definition as its calling program, the logical end
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of the operation occurs after the single or blocked insert, update, or delete
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record operation is performed by the calling program, and control returns
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from any called before or after trigger programs. As a result, duplicate key
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errors are not detectable in trigger programs that use the same commitment
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definition as the insert, update, or delete record operation that called the
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trigger programs.</p>
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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="rbaforzahftrb2.htm" title="These topics discuss recommendations, precautions, and error messages for trigger programs. Information about monitoring and commitment control is also included.">Other important information about working with triggers</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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