75 lines
4.3 KiB
HTML
75 lines
4.3 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="reference" />
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<meta name="DC.Title" content="Long description of Figure 1: Using savepoints to control rollbacks in a transaction (rzahh586.gif)" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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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>Long description of Figure 1: Using savepoints to control rollbacks
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in a transaction (rzahh586.gif)</title>
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</head>
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<body id="rzahh586"><a name="rzahh586"><!-- --></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">Long description of Figure 1: Using savepoints to control rollbacks
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in a transaction (rzahh586.gif)</h1>
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<div><div class="section"><p><strong>found in IBM<sup>®</sup> Toolbox for Java™: AS400JDBCSavepoint class</strong></p>
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</div>
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<div class="section"><p>This figure illustrates how to use savepoints to control rollbacks
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in a transaction.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Description</h4><p>The figure is composed of the following:</p>
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<ul><li>A blue horizontal arrow, pointing to the right, labeled 'Transaction.'
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The Transaction arrow represents a linear transaction that begins on the
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left and ends on the right.</li>
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<li>Below the Transaction arrow is a multicolored bar of equal length to the
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Transaction arrow. The bar is divided into four colored sections that, from
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left to right, represent the separate actions that constitute the transaction.
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Under the bar are two labels that represent savepoints in the transaction.</li>
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<li>Below the multicolored bar are three arrows positioned one above the other.
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The arrows point left, and each one represents rolling back the transaction
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to a different point.</li>
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</ul>
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<p> The Transaction arrow represents a transaction that begins on the
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left and ends on the right. The transaction is composed of a series of separate
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actions (the different sections of the multicolored bar). From left to right,
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the colored sections represent: </p>
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<ul><li>The first action (a tan section) labeled 'Insert'</li>
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<li>The second action (a green section) labeled 'Update'</li>
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<li>The third action (another tan section) labeled 'Insert'</li>
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<li>The fourth and final action (a blue section) labeled 'Delete'</li>
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</ul>
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<p> Labels below the multicolored bar represent savepoints. The point
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where the first action ends and the second begins is labeled 'Savepoint A.'
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The point where the third action ends and the fourth begins is labeled 'Savepoint
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B.'</p>
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<p>Arrows below the multicolored bar point to the left and represent
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how the savepoints affect rolling back the transaction:</p>
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<ul><li>The first arrow points to Savepoint B. Rolling back the transaction to
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Savepoint B reverses only the final action (the blue section labeled 'Delete')</li>
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<li>The second arrow points to Savepoint A. Rolling back the transaction to
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Savepoint A reverses the second through fourth actions (the green section
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labeled 'Update,' the second tan section labeled 'Insert,' and the blue section
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labeled 'Delete')</li>
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<li>The final arrow points to the very beginning of the transaction. Completely
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rolling back the transaction reverses all of the separate actions</li>
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</ul>
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</div>
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</div>
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</body>
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</html>
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