74 lines
4.6 KiB
HTML
74 lines
4.6 KiB
HTML
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<meta name="abstract" content="The PFILE keyword is important in this example. The example uses new field specifications and provides two record formats. Each record format provides a different view of the associated physical file and uses a key different from the associated physical file." />
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<title>Example: A logical file specifying multiple formats and new keys</title>
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<body id="logfileexamp"><a name="logfileexamp"><!-- --></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">Example: A logical file specifying multiple formats and new keys</h1>
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<div><p>The PFILE keyword is important in this example. The example uses
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new field specifications and provides two record formats. Each record format
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provides a different view of the associated physical file and uses a key different
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from the associated physical file.</p>
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<div class="fignone" id="logfileexamp__o4"><a name="logfileexamp__o4"><!-- --></a><span class="figcap">Figure 1. DDS for a logical file specifying new keys</span><pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00010A*
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00020A* SAMPLE LOGICAL FILE
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00030A
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00040A R CUSMST1 <strong>(1)</strong>PFILE(CUSMSTP)
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00050A ACTNUM
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00060A NAME
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00070A STATE
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00080A LASTNAME I <strong>(3)</strong>SST(NAME 8 10)
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00090A <strong>(2)</strong> K ACTNUM
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00100A*
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00110A R CUSMST2 <strong>(1)</strong>PFILE(CUSMSTP)
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00120A ACTNUM
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00130A NAME
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00140A ZIP
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00150A K *NONE
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00160A <strong>(2)</strong> K NAME
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A</pre>
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</div>
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<div class="p"><strong>Legend: </strong> <dl><dt class="dlterm">(1)</dt>
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<dd>The two record formats (CUSMST1 and CUSMST2) in this logical file are
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based on the same physical file (CUSMSTP).</dd>
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<dt class="dlterm">(2)</dt>
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<dd>Record format CUSMST1 has a key different from record format CUSMST2,
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providing the application program with a different sequence of the same records.</dd>
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<dt class="dlterm">(3)</dt>
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<dd>The LASTNAME field is a substring of the field NAME. The usage I in position
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38 must be specified because this is not a join logical file.</dd>
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</dl>
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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="rbafpmstexamp.htm" title="This topic provides examples of data description specifications (DDS) for each type of file discussed in this topic. If you choose, you can use the examples in this topic with appropriate high-level language programs.">Examples: DDS for each file type</a></div>
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