80 lines
4.9 KiB
HTML
80 lines
4.9 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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<meta name="DC.Type" content="task" />
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<meta name="DC.Title" content="Remove referential constraints" />
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<meta name="abstract" content="You can remove referential constraints in various ways. The full impact of the removal depends on the constraint you are removing and the certain conditions that surround the constraint." />
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<meta name="description" content="You can remove referential constraints in various ways. The full impact of the removal depends on the constraint you are removing and the certain conditions that surround the constraint." />
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<meta name="DC.Relation" scheme="URI" content="../cl/rmvpfcst.htm" />
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<meta name="DC.Relation" scheme="URI" content="../rzatc/rzatcgetstartinav.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Remove referential constraints</title>
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</head>
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<body id="rbaforzahfrc0"><a name="rbaforzahfrc0"><!-- --></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">Remove referential constraints</h1>
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<div><p>You can remove referential constraints in various ways. The full
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impact of the removal depends on the constraint you are removing and the certain
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conditions that surround the constraint.</p>
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<div class="section"> <p>To remove a referential constraint, follow these steps:</p>
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</div>
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<ol><li class="stepexpand"><span>Run the Remove Physical File Constraint (RMVPFCST) command.</span></li>
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<li class="stepexpand"><span>Specify the constraint or constraints you want to remove using
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the CST and TYPE parameters.</span> <ul><li>Use the CST parameter to specify all constraints or a specific constraint
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name.</li>
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<li>Use the TYPE parameter to specify a particular type of constraint.</li>
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</ul>
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</li>
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</ol>
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<div class="section"> <p>You can also remove a referential constraint using iSeries™ Navigator. </p>
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<p>When
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you remove a referential constraint, the system removes the associated foreign
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keys and access paths from the file. The system does not remove the foreign
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key access path if any logical file or other constraint on the system uses
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it.</p>
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<p>If you remove a referential, primary key, or unique constraint,
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and the associated access path is shared by a logical file, the ownership
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of the shared path transfers to the logical file.</p>
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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="rbaforzahfrc1.htm">Details: Remove a constraint with the CST parameter</a></strong><br />
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This topic discusses the constraints that you can remove with the CST parameter.</li>
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<li class="ulchildlink"><strong><a href="rbaforzahfrc2.htm">Details: Remove a constraint with the TYPE parameter</a></strong><br />
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This topic discusses the constraints that you can remove with the TYPE parameter.</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="rbaforzahfrca.htm" title="These topics discuss how to use referential constraints in your database to ensure that it contains only valid data.">Ensure data integrity with referential constraints</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="../rzatc/rzatcgetstartinav.htm">Get started with iSeries Navigator</a></div>
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<div><a href="../sqlp/rbafykickoff.htm">SQL programming</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="../cl/rmvpfcst.htm">Remove Physical File Constraint (RMVPFCST) command</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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