130 lines
6.8 KiB
HTML
130 lines
6.8 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="reference" />
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<meta name="DC.Title" content="Specify the key field (example 4)" />
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<meta name="abstract" content="In this example, assume that an employee has repeated a class. To sequence two records with the same values for EMPNBR and CLSDTE, a third key field, DATE, is specified in record format CLSHST." />
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<meta name="description" content="In this example, assume that an employee has repeated a class. To sequence two records with the same values for EMPNBR and CLSDTE, a third key field, DATE, is specified in record format CLSHST." />
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<meta name="DC.Relation" scheme="URI" content="lkeynm.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="logfileviewex4" />
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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>Specify the key field (example 4)</title>
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</head>
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<body id="logfileviewex4"><a name="logfileviewex4"><!-- --></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 key field (example 4)</h1>
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<div><p>In this example, assume that an employee has repeated a class.
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To sequence two records with the same values for EMPNBR and CLSDTE, a third
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key field, DATE, is specified in record format CLSHST.</p>
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<div class="example"><p>However, DATE cannot be specified in the next available key position
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(position 3) because JOBDTE and ACTDTE appear in that position for other formats.
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If DATE is specified in this position, the attributes of DATE are compared
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with the attributes of CLSHST and JOBHST, and the key definitions are rejected.</p>
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<p>To
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obtain the sequencing necessary, specify *NONE before DATE, displacing DATE
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to key position 4.</p>
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<p>The DATE field can be shown in position 4 as in <a href="#logfileviewex4__cfig9">Figure 1</a>.</p>
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<div class="fignone" id="logfileviewex4__cfig9"><a name="logfileviewex4__cfig9"><!-- --></a><span class="figcap">Figure 1. Specify the
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key field (example 4)</span><pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00010A R EMPMST PFILE(EMPMSTP)
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00020A K EMPNBR
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00030A*
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00040A R CLSREG PFILE(CLSREGP)
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00050A K EMPNBR
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00060A K CLSDTE
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00070A*
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00080A R CLSHST PFILE(CLSHSTP)
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00090A K EMPNBR
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00100A K CLSDTE
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00110A K *NONE <span><span>1</span></span>
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00120A K DATE <span><span>1</span></span>
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00130A*
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00140A R JOBHST PFILE(JOBHSTP)
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00150A K EMPNBR
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00160A K *NONE
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00170A K JOBDTE
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00180A*
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00190A R ACTHST PFILE(ACTHSTP)
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00200A K EMPNBR
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00210A K *NONE
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00220A K ACTDTE
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A</pre>
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</div>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="void" border="0" rules="none"><thead align="left"><tr><th valign="top" width="20%" id="d0e44">Record format</th>
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<th valign="top" width="20%" id="d0e46">Key positions</th>
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<th valign="top" width="20%" id="d0e48"> </th>
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<th valign="top" width="20%" id="d0e49"> </th>
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<th valign="top" width="20%" id="d0e50"> </th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" width="20%" headers="d0e44 "> </td>
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<td valign="top" width="20%" headers="d0e46 "><span>1</span></td>
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<td valign="top" width="20%" headers="d0e48 "><span>2</span></td>
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<td valign="top" width="20%" headers="d0e49 "><span>3</span></td>
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<td valign="top" width="20%" headers="d0e50 "><span>4</span></td>
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</tr>
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<tr><td valign="top" width="20%" headers="d0e44 ">EMPMST</td>
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<td valign="top" width="20%" headers="d0e46 ">EMPNBR</td>
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<td valign="top" width="20%" headers="d0e48 ">*NONE</td>
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<td valign="top" width="20%" headers="d0e49 ">*NONE</td>
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<td valign="top" width="20%" headers="d0e50 ">*NONE</td>
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</tr>
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<tr><td valign="top" width="20%" headers="d0e44 ">CLSREG</td>
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<td valign="top" width="20%" headers="d0e46 ">EMPNBR</td>
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<td valign="top" width="20%" headers="d0e48 ">CLSDTE</td>
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<td valign="top" width="20%" headers="d0e49 ">*NONE</td>
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<td valign="top" width="20%" headers="d0e50 ">*NONE</td>
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</tr>
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<tr><td valign="top" width="20%" headers="d0e44 ">CLSHST</td>
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<td valign="top" width="20%" headers="d0e46 ">EMPNBR</td>
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<td valign="top" width="20%" headers="d0e48 ">CLSDTE</td>
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<td valign="top" width="20%" headers="d0e49 ">*NONE</td>
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<td valign="top" width="20%" headers="d0e50 ">DATE</td>
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</tr>
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<tr><td valign="top" width="20%" headers="d0e44 ">JOBHST</td>
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<td valign="top" width="20%" headers="d0e46 ">EMPNBR</td>
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<td valign="top" width="20%" headers="d0e48 ">*NONE</td>
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<td valign="top" width="20%" headers="d0e49 ">JOBDTE</td>
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<td valign="top" width="20%" headers="d0e50 ">*NONE</td>
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</tr>
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<tr><td valign="top" width="20%" headers="d0e44 ">ACTHST</td>
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<td valign="top" width="20%" headers="d0e46 ">EMPNBR</td>
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<td valign="top" width="20%" headers="d0e48 ">*NONE</td>
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<td valign="top" width="20%" headers="d0e49 ">ACTDTE</td>
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<td valign="top" width="20%" headers="d0e50 ">*NONE</td>
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</tr>
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</tbody>
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</table>
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</div>
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<p>Specifying DATE in key position 4 enables records from physical
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file CLSHSTP with identical values for EMPNBR and CLSDTE to be merged and
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sequenced according to the value for DATE.</p>
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<div class="note"><span class="notetitle">Note:</span> Because values
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are actually placed in the keys to ensure the sequencing in the previous examples,
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duplicate key values are not always predictable when *NONE is needed for logical
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files with more than one record format.</div>
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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="lkeynm.htm" title="When you specify K in position 17, the name specified in positions 19 through 28 is a key field name.">Key field name</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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