57 lines
3.6 KiB
HTML
57 lines
3.6 KiB
HTML
<?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="DC.Type" content="reference" />
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<meta name="DC.Title" content="FILE LINK CONTROL with DB permissions" />
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<meta name="abstract" content="When the DataLink column is create as FILE LINK CONTROL with database (DB) permissions, the URL is verified, and all existing permissions to the object are removed." />
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<meta name="description" content="When the DataLink column is create as FILE LINK CONTROL with database (DB) permissions, the URL is verified, and all existing permissions to the object are removed." />
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<meta name="DC.Relation" scheme="URI" content="rbafydlnolink.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.Language" content="en-us" />
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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>FILE LINK CONTROL with DB permissions</title>
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</head>
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<body id="filelinkcontrolwithdbpermission"><a name="filelinkcontrolwithdbpermission"><!-- --></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">FILE LINK CONTROL with DB permissions</h1>
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<div><p>When the DataLink column is create as FILE LINK CONTROL with database
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(DB) permissions, the URL is verified, and all existing permissions
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to the object are removed.</p>
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<div class="section"><p>The ownership of the object is changed to a special system-supplied
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user profile. During the time that the object is linked, the only access
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to the object is by obtaining the URL from the SQL table that has the object
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linked. This is handled by using a special access token that is appended
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to the URL returned by SQL. Without the access token, all attempts to access
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the object will fail with an authority violation. If the URL with the access
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token is retrieved from the SQL table by normal means (FETCH, SELECT INTO,
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and so on.) the file system filter will validate the access token and allow
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the access to the object.</p>
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<p>This option provides the control of preventing
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updates to the linked object for users trying to access the object by direct
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means. Since the only access to the object is by obtaining the access token
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from an SQL operation, an administrator can effectively control access to
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the linked objects by using the database permissions to the SQL table that
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contains the DataLink column.</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="rbafydlnolink.htm" title="You can create a DataLink column with different link controls.">Link control levels in DataLinks</a></div>
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</div>
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</div>
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</body>
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</html> |