78 lines
4.5 KiB
HTML
78 lines
4.5 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="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="reference" />
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<meta name="DC.Title" content="Check pending" />
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<meta name="abstract" content="Referential constraints and check constraints can be in a state known as check pending, where potential violations of the constraint exist." />
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<meta name="description" content="Referential constraints and check constraints can be in a state known as check pending, where potential violations of the constraint exist." />
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<meta name="DC.subject" content="constraint, referential, check pending" />
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<meta name="keywords" content="constraint, referential, check pending" />
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<meta name="DC.Relation" scheme="URI" content="rbafysqlpctablecreate.htm" />
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<meta name="DC.Relation" scheme="URI" content="../dbp/rbaforzahfcoh.htm" />
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<meta name="DC.Relation" scheme="URI" content="../dbp/rbaforzahfrcv.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rbafyrfcheck" />
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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>Check pending</title>
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</head>
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<body id="rbafyrfcheck"><a name="rbafyrfcheck"><!-- --></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">Check pending</h1>
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<div><p>Referential constraints and check constraints can be in a state
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known as check pending, where potential violations of the constraint exist. </p>
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<div class="section"><p>For referential constraints, a violation occurs when potential
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mismatches exist between parent and foreign keys. For check constraints, a
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violation occurs when potential values exist in columns which are limited
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by the check constraint. When the system determines that the constraint may
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have been violated (such as after a restore operation), the constraint is
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marked as check pending. When this happens, restrictions are placed on the
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use of tables involved in the constraint. For referential constraints, the
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following restrictions apply: </p>
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<ul><li>No input or output operations are allowed on the dependent file.</li>
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<li>Only read and insert operations are allowed on the parent file.</li>
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</ul>
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</div>
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<div class="section"><p>When a check constraint is in check pending, the following restrictions
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apply: </p>
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<ul><li>Read operations are not allowed on the file.</li>
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<li>Inserts and updates are allowed and the constraint is enforced.</li>
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</ul>
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</div>
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<div class="section"><p>To get a constraint out of check pending, you must:</p>
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</div>
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<div class="section"> <ol><li>Disable the relationship with the Change Physical File Constraint (CHGPFCST)
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CL command.</li>
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<li>Correct the key (foreign, parent, or both) data for referential constraints
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or column data for check constraints.</li>
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<li>Enable the constraint again with the CHGPFCST CL command.</li>
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</ol>
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</div>
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<div class="section"><p>You can identify the rows that are in violation of the constraint
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with the Display Check Pending Constraint (DSPCPCST) CL command. </p>
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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="rbafysqlpctablecreate.htm" title="A table can be visualized as a two-dimensional arrangement of data consisting of rows and columns.">Create a table</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../dbp/rbaforzahfcoh.htm">Work with constraints that are in check pending status</a></div>
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<div><a href="../dbp/rbaforzahfrcv.htm">Check pending status in referential constraints</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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