63 lines
4.3 KiB
HTML
63 lines
4.3 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 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="Change a logical file description and attributes" />
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<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." />
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<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." />
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<meta name="DC.subject" content="logical file, changing, descriptions, attributes" />
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<meta name="keywords" content="logical file, changing, descriptions, attributes" />
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<meta name="DC.Relation" scheme="URI" content="rbafochgfile.htm" />
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<meta name="DC.Relation" scheme="URI" content="../cl/chglf.htm" />
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<meta name="DC.Relation" scheme="URI" content="../cl/crtlf.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="rbafochglfda" />
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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>Change a logical file description and attributes</title>
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</head>
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<body id="rbafochglfda"><a name="rbafochglfda"><!-- --></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">Change a logical file description and attributes</h1>
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<div><p>As a general rule, when you make changes to a logical file, which
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causes a change to the level identifier (for example, adding a new field,
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deleting a field, or changing the length of a field), it is strongly recommended
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that you recompile the program that uses the logical file.</p>
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<p>Sometimes you can make changes to a logical file, which changes the level
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identifier and does not require you to recompile your program
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(for example, adding a field that will not be used by your program to the
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end of the file). However, in those situations you are forced to turn off
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level checking to run your program that uses the changed file. That is not
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the preferred method of operating. It increases the chances of incorrect data
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in the future.</p>
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<p>To avoid recompiling, you can keep the current logical file (unchanged)
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and create a new logical file with the added field. Your program refers to
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the old file, which still exists.</p>
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<p>You can use the Change Logical File (CHGLF) command to change most of the
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attributes of a logical file and its members that were specified on the Create
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Logical File (CRTLF) command.</p>
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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="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>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="../cl/chglf.htm">Change Logical File (CHGLF) command</a></div>
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<div><a href="../cl/crtlf.htm">Create Logical File (CRTLF) command</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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