51 lines
3.5 KiB
HTML
51 lines
3.5 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="concept" />
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<meta name="DC.Title" content="Describe field use for logical files: Input only" />
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<meta name="abstract" content="An input-only field can be used for read operations only. Your program can read data from the field, but cannot update the field in the file." />
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<meta name="description" content="An input-only field can be used for read operations only. Your program can read data from the field, but cannot update the field in the file." />
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<meta name="DC.subject" content="field, input only, input-only field, TRNTBL (Translation Table) keyword, Translation Table (TRNTBL) keyword, keyword, DDS, TRNTBL (Translation Table), SST (Substring), SST (Substring) keyword" />
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<meta name="keywords" content="field, input only, input-only field, TRNTBL (Translation Table) keyword, Translation Table (TRNTBL) keyword, keyword, DDS, TRNTBL (Translation Table), SST (Substring), SST (Substring) keyword" />
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<meta name="DC.Relation" scheme="URI" content="rbafodeffd.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="rbafoinput" />
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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>Describe field use for logical files: Input only</title>
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</head>
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<body id="rbafoinput"><a name="rbafoinput"><!-- --></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">Describe field use for logical files: Input only</h1>
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<div><p>An input-only field can be used for read operations only. Your
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program can read data from the field, but cannot update the field in the file. </p>
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<p>Typical cases of input-only fields are key fields (to reduce maintenance
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of access paths by preventing changes to key field values), sensitive fields
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that a user can see but not update (for example, salary), and fields for which
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either the translation table (TRNTBL) keyword or the substring (SST) keyword
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is specified.</p>
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<p>If your program updates a record in which you have specified input-only
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fields, the input-only fields are not changed in the file. If your program
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adds a record that has input-only fields, the input-only fields take default
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values (DFT keyword).</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="rbafodeffd.htm" title="You can specify that the fields in logical files are to be input-only, both (input/output), or neither fields.">Describe field use for logical files</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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