62 lines
4.2 KiB
HTML
62 lines
4.2 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 http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2005" />
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<meta name="DC.rights.owner" content="(C) Copyright IBM Corporation 2005" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Prevent copy errors that result from constraint relationships" />
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<meta name="abstract" content="A constraint relationship is a mechanism to ensure data integrity between a dependent file and a parent file. You need to pay attention to the constraint relationship when copying files." />
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<meta name="description" content="A constraint relationship is a mechanism to ensure data integrity between a dependent file and a parent file. You need to pay attention to the constraint relationship when copying files." />
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<meta name="DC.Relation" scheme="URI" content="rbal3preerr.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbal3precfil.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbal3coppen.htm" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rbal3precop" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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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>Prevent copy errors that result from constraint relationships</title>
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</head>
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<body id="rbal3precop"><a name="rbal3precop"><!-- --></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">Prevent copy errors that result from constraint relationships</h1>
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<div><p>A <dfn class="term">constraint relationship</dfn> is a mechanism to ensure
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data integrity between a dependent file and a parent file. You need to pay
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attention to the constraint relationship when copying files.</p>
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<p>A constraint relationship exists between a dependent file and a parent
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file when every non-null foreign key value in the foreign key access path
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of the dependent file matches a parent key value in the parent key access
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path of the parent file. A physical data file can be a parent or dependent
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file. However, a source physical file cannot be a parent or a dependent file.</p>
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<div class="p">The copy commands listed below allow the following relationships: <ul><li><a href="../cl/cpyf.htm">CPYF</a> -
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from-file or to-file can be a parent or dependent file</li>
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<li><a href="../cl/cpyfrmqryf.htm">CPYFRMQRYF</a> -
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to-file can be a parent or dependent file</li>
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<li><a href="../cl/cpyfrmtap.htm">CPYFRMTAP</a> -
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to-file can be a parent or dependent file</li>
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<li><a href="../cl/cpytotap.htm">CPYTOTAP</a> -
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from-file can be a parent or dependent file</li>
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</ul>
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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="rbal3preerr.htm" title="You can prevent many copy errors when you plan for certain conditions and situations ahead of time.">Prevent errors when copying files</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="rbal3precfil.htm" title="When the parent or dependent file has an established constraint relationship that is not in check-pending status, the rules described in this topic apply.">Copy files not in check-pending status</a></div>
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<div><a href="rbal3coppen.htm" title="When the parent or dependent file has an established constraint relationship that is in check-pending status, the rules described in this topic apply.">Copy files in check pending status</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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