66 lines
4.1 KiB
HTML
66 lines
4.1 KiB
HTML
<?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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<meta name="DC.Title" content="FIFO (First-In First-Out) keyword for physical and logical files" />
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<meta name="abstract" content="Use this file-level keyword to specify that if records with duplicate key values are retrieved from the same physical or logical file member, they are to be retrieved in a first-in first-out (FIFO) order." />
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<meta name="description" content="Use this file-level keyword to specify that if records with duplicate key values are retrieved from the same physical or logical file member, they are to be retrieved in a first-in first-out (FIFO) order." />
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<meta name="DC.subject" content="FIFO (First-In First-Out) keyword, First-In First-Out (FIFO) keyword" />
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<meta name="keywords" content="FIFO (First-In First-Out) keyword, First-In First-Out (FIFO) keyword" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Identifier" content="tdfifo" />
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<title>Physical and Logical Files, FIFO</title>
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</head>
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<body id="tdfifo"><a name="tdfifo"><!-- --></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">FIFO (First-In First-Out) keyword for physical and logical files</h1>
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<div><p>Use this file-level keyword to specify that if records with duplicate
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key values are retrieved from the same physical or logical file member, they
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are to be retrieved in a first-in first-out (FIFO) order.</p>
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<div class="section"><p>This keyword has no parameters.</p>
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<p>FIFO is not allowed with
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an first-changed first-out (FCFO), last-in first-out (LIFO), UNIQUE, or REFACCPTH
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keyword.</p>
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<p>If you do not specify FCFO, LIFO, FIFO, or UNIQUE, records
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with duplicate key values are retrieved in FIFO, LIFO, or FCFO
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order, but the order in which they are retrieved is not guaranteed.</p>
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<p>At
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least one key field must be specified in a file containing the FIFO keyword.
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The FIFO keyword is not valid when you specify FILETYPE(*SRC) on the Create
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Physical File (CRTPF) or Create Logical File (CRTLF) command.</p>
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</div>
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<div class="example"><h4 class="sectiontitle">Example</h4><p>The following example shows how to specify
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the FIFO keyword for a physical file.</p>
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<pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00010A FIFO
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00020A R CUSREC TEXT('CUSTOMER RECORD')
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00030A CUSNAMEF 10A
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00040A CUSNAMEM 1A
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00050A CUSNAMEL 10A
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00060A K CUSNAMEL
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A</pre>
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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="rzakbmstlfkeyw.htm" title="This topic lists valid keyword entries for describing physical and logical files. They are typed in positions 45 through 80 (functions).">Keyword entries for physical and logical files (positions 45 through 80)</a></div>
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</div>
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</div>
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</body>
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</html> |