71 lines
5.1 KiB
HTML
71 lines
5.1 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="WITH CHECK OPTION on a View" />
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<meta name="abstract" content="WITH CHECK OPTION is an optional clause on the CREATE VIEW statement that specifies the level of checking to be done when inserting or updating data through a view. If the option is specified, every row that is inserted or updated through the view must conform to the definition of that view." />
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<meta name="description" content="WITH CHECK OPTION is an optional clause on the CREATE VIEW statement that specifies the level of checking to be done when inserting or updating data through a view. If the option is specified, every row that is inserted or updated through the view must conform to the definition of that view." />
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<meta name="DC.subject" content="view, WITH CHECK, CREATE VIEW statement, WITH CHECK OPTION" />
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<meta name="keywords" content="view, WITH CHECK, CREATE VIEW statement, WITH CHECK OPTION" />
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<meta name="DC.Relation" scheme="URI" content="rbafyviewnt.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafywithcascade.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafywithlocalcheck.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafyexcascade.htm" />
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<meta name="DC.Relation" scheme="URI" content="../db2/rbafzmsthcview.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="rbafywcohdg" />
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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>WITH CHECK OPTION on a View</title>
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</head>
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<body id="rbafywcohdg"><a name="rbafywcohdg"><!-- --></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">WITH CHECK OPTION on a View</h1>
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<div><p>WITH CHECK OPTION is an optional clause on the CREATE VIEW statement
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that specifies the level of checking to be done when inserting or updating
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data through a view. If the option is specified, every row that is inserted
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or updated through the view must conform to the definition of that view.</p>
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<div class="section"><p>WITH CHECK OPTION cannot be specified if the view is read-only.
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The definition of the view must not include a subquery.</p>
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</div>
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<div class="section"><p>If the view is created without a WITH CHECK OPTION clause, insert
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and update operations that are performed on the view are not checked for conformance
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to the view definition. Some checking might still occur if the view is directly
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or indirectly dependent on another view that includes WITH CHECK OPTION. Because
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the definition of the view is not used, rows might be inserted or updated
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through the view that do not conform to the definition of the view. This means
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that the rows cannot be selected again using the view.</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="rbafywithcascade.htm">WITH CASCADED CHECK OPTION</a></strong><br />
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The WITH CASCADED CHECK OPTION clause specifies that every row that is inserted or updated through the view must conform to the definition of the view.</li>
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<li class="ulchildlink"><strong><a href="rbafywithlocalcheck.htm">WITH LOCAL CHECK OPTION</a></strong><br />
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The WITH LOCAL CHECK OPTION clause is identical to the WITH CASCADED CHECK OPTION clause except that you can update a row so that it no longer can be retrieved through the view. This can only happen when the view is directly or indirectly dependent on a view that was defined with no WITH CHECK OPTION clause.</li>
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<li class="ulchildlink"><strong><a href="rbafyexcascade.htm">Cascaded check option</a></strong><br />
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This example illustrates using the Cascaded check option.</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="rbafyviewnt.htm" title="A view can be used to access data in one or more tables or views. You create a view by using a SELECT statement.">Create and use views</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="../db2/rbafzmsthcview.htm">CREATE VIEW</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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