60 lines
4.3 KiB
HTML
60 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="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="Specify the check for record format description changes (LVLCHK) parameter" />
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<meta name="abstract" content="When the file is opened, the system checks for changes to the database file definition. You can specify the check for record format description changes with the LVLCHK parameter." />
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<meta name="description" content="When the file is opened, the system checks for changes to the database file definition. You can specify the check for record format description changes with the LVLCHK parameter." />
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<meta name="DC.subject" content="record format, checking, changes to the description (LVLCHK parameter), description, checking for changes to the record format, LVLCHK (Level Check) parameter, Level Check (LVLCHK) parameter, parameter, LVLCHK (Level Check)" />
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<meta name="keywords" content="record format, checking, changes to the description (LVLCHK parameter), description, checking for changes to the record format, LVLCHK (Level Check) parameter, Level Check (LVLCHK) parameter, parameter, LVLCHK (Level Check)" />
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<meta name="DC.Relation" scheme="URI" content="rbafocrtatt.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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<!-- 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>Specify the check for record format description changes (LVLCHK) parameter</title>
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</head>
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<body id="rbafocrtlvl"><a name="rbafocrtlvl"><!-- --></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">Specify the check for record format description changes (LVLCHK) parameter</h1>
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<div><p>When the file is opened, the system checks for changes to the database
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file definition. You can specify the check for record format description changes
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with the LVLCHK parameter. </p>
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<div class="p">When the file changes to an extent that your program might not be able
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to process the file, the system notifies your program. The default is to do
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level checking. You can specify if you want level checking when you: <ul><li>Create a file.</li>
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<li>Use a change database file command.</li>
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</ul>
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</div>
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<p>You can override the system and ignore the level check using the Override
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with Database File (OVRDBF) command.</p>
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<div class="section" id="rbafocrtlvl__rbafonoid15"><a name="rbafocrtlvl__rbafonoid15"><!-- --></a><h4 class="sectiontitle">Example: Level check</h4><p>For example,
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assume that you compiled your program two months ago and, at that time, the
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file was defined as having three fields in each record. Last
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week another programmer decided to add a new field to the record format, so
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that now each record have four fields. The system notifies your program, when
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it tries to open the file, that a significant change occurred to the definition
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of the file since the last time the program was compiled. This notification
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is known as a record format level check.</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="rbafocrtatt.htm" title="When you create a database file, database attributes are stored with the file and members. You specify attributes with database command parameters.">Specify database file and member attributes</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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