76 lines
4.9 KiB
HTML
76 lines
4.9 KiB
HTML
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<meta name="DC.Title" content="Examples: Trigger programs" />
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<meta name="abstract" content="This topic provides examples of trigger programs written in C, COBOL, and RPG." />
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<meta name="description" content="This topic provides examples of trigger programs written in C, COBOL, and RPG." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Examples: Trigger programs</title>
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</head>
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<body id="rbaforzahftri"><a name="rbaforzahftri"><!-- --></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">Examples: Trigger programs</h1>
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<div><p>This topic provides examples of trigger programs written in C,
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COBOL, and RPG.</p>
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<p>The trigger programs in the following examples are triggered by write,
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update, and delete operations to the ATMTRANS file. They are written in ILE
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C, ILE COBOL, and RPG/400<sup>®</sup>. For an ILE RPG example, see the <a href="http://www.redbooks.ibm.com/abstracts/sg246503.html" target="_blank"> Stored
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Procedures, Triggers and User Defined Functions on DB2
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Universal Database™ for iSeries™</a><img src="rbpdf.gif" alt="Link to PDF" /> redbook.</p>
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<div class="p">The application contains the following types of transactions.<ol><li>The application inserts three records into the ATMTRANS file which runs
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an insert trigger. The insert trigger adds the correct amount to the ATMS
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file and the ACCTS file to reflect the changes.</li>
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<li>Next, the application makes two withdrawals, which run an update trigger: <ol type="a"><li>The application withdraws $25.00 from account number 20001 and ATM number
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10001 which runs the update trigger. The update trigger subtracts $25.00 from
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the ACCTS and ATMS files.</li>
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<li>The application withdraws $900.00 from account number 20002 and ATM number
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10002 which runs an update trigger. The update trigger signals an exception
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to the application indicating that the transaction fails.</li>
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</ol>
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</li>
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<li>Finally, the application deletes the ATM number from the ATMTRANS file
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which runs a delete trigger. The delete trigger deletes the corresponding
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ACCTID from the ACCTS file and ATMID from the ATMS file.</li>
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</ol>
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</div>
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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="rbaforzahftrj.htm">Example: Insert trigger written in RPG</a></strong><br />
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The RPG trigger program inserts records into the ATMTRANS file in this example.</li>
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<li class="ulchildlink"><strong><a href="rbaforzahftrk.htm">Example: Update trigger written in ILE COBOL</a></strong><br />
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This example shows the running of the ILE COBOL trigger program when a record is updated in the ATMTRANS file.</li>
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<li class="ulchildlink"><strong><a href="rbaforzahftrl.htm">Example: Delete trigger written in ILE C</a></strong><br />
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This example shows the running of the ILE C trigger program when a record is deleted in the ATMTRANS file.</li>
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<li class="ulchildlink"><strong><a href="rbaforzahftrt.htm">Trigger programs: Data structures of database used in the examples</a></strong><br />
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This topic describes the data structures that are used in this application.</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="rbaforzahftrb.htm" title="These topics discuss how to create and work with trigger programs.">Create trigger programs</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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