63 lines
4.3 KiB
HTML
63 lines
4.3 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE html
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html lang="en-us" xml:lang="en-us">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="security" content="public" />
|
|
<meta name="Robots" content="index,follow" />
|
|
<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))' />
|
|
<meta name="DC.Type" content="concept" />
|
|
<meta name="DC.Title" content="Change a logical file description and attributes" />
|
|
<meta name="abstract" content="As a general rule, when you make changes to a logical file, which causes a change to the level identifier (for example, adding a new field, deleting a field, or changing the length of a field), it is strongly recommended that you recompile the program that uses the logical file." />
|
|
<meta name="description" content="As a general rule, when you make changes to a logical file, which causes a change to the level identifier (for example, adding a new field, deleting a field, or changing the length of a field), it is strongly recommended that you recompile the program that uses the logical file." />
|
|
<meta name="DC.subject" content="logical file, changing, descriptions, attributes" />
|
|
<meta name="keywords" content="logical file, changing, descriptions, attributes" />
|
|
<meta name="DC.Relation" scheme="URI" content="rbafochgfile.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="../cl/chglf.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="../cl/crtlf.htm" />
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
|
|
<meta name="DC.Format" content="XHTML" />
|
|
<meta name="DC.Identifier" content="rbafochglfda" />
|
|
<meta name="DC.Language" content="en-us" />
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
|
<title>Change a logical file description and attributes</title>
|
|
</head>
|
|
<body id="rbafochglfda"><a name="rbafochglfda"><!-- --></a>
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">Change a logical file description and attributes</h1>
|
|
<div><p>As a general rule, when you make changes to a logical file, which
|
|
causes a change to the level identifier (for example, adding a new field,
|
|
deleting a field, or changing the length of a field), it is strongly recommended
|
|
that you recompile the program that uses the logical file.</p>
|
|
<p>Sometimes you can make changes to a logical file, which changes the level
|
|
identifier and does not require you to recompile your program
|
|
(for example, adding a field that will not be used by your program to the
|
|
end of the file). However, in those situations you are forced to turn off
|
|
level checking to run your program that uses the changed file. That is not
|
|
the preferred method of operating. It increases the chances of incorrect data
|
|
in the future.</p>
|
|
<p>To avoid recompiling, you can keep the current logical file (unchanged)
|
|
and create a new logical file with the added field. Your program refers to
|
|
the old file, which still exists.</p>
|
|
<p>You can use the Change Logical File (CHGLF) command to change most of the
|
|
attributes of a logical file and its members that were specified on the Create
|
|
Logical File (CRTLF) command.</p>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafochgfile.htm" title="These topics discuss how to change the database file descriptions and attributes. Considerations for changing fields in a file description are also included.">Change database file descriptions and attributes</a></div>
|
|
</div>
|
|
<div class="relref"><strong>Related reference</strong><br />
|
|
<div><a href="../cl/chglf.htm">Change Logical File (CHGLF) command</a></div>
|
|
<div><a href="../cl/crtlf.htm">Create Logical File (CRTLF) command</a></div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html> |