86 lines
5.2 KiB
HTML
86 lines
5.2 KiB
HTML
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<meta name="abstract" content="Use this file-level keyword to direct the operating system to use an alternative collating sequence table when sequencing the records of a file member for retrieval, if you specified a key for this file." />
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<title>Physical and Logical Files, ALTSEQ</title>
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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">ALTSEQ (Alternative Collating Sequence) keyword for physical and logical
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files</h1>
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<div><p>Use this file-level keyword to direct the operating system to use
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an alternative collating sequence table when sequencing the records of a file
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member for retrieval, if you specified a key for this file.</p>
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<div class="section"><div class="p">The format of the keyword is: <pre>ALTSEQ([library-name/]table-name)</pre>
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</div>
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<p>The
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name of the alternative collating sequence table is a required parameter value.
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The library-name is optional. If you do not specify the library-name, the <span class="keyword">i5/OS™</span> operating system uses
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the library list (*LIBL) at file creation time.</p>
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<div class="p">The ALTSEQ keyword is
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not valid under the following conditions: <ul><li>When you specify FILETYPE(*SRC) on the Create Physical File (CRTPF) or
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Create Logical File (CRTLF) command.</li>
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<li>When key fields have a data type of packed decimal, binary, or floating-point.</li>
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<li>When key fields are specified with ABSVAL or SIGNED. For those fields,
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NOALTSEQ (a key field-level keyword) is assumed and does not need to be specified.
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You can specify NOALTSEQ for any field in a composite key that does not require
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the alternative sequence.</li>
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<li>When you specify a value other than *SRC on the SRTSEQ parameter on the
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Create Physical File (CRTPF) or Create Logical File (CRTLF) command.</li>
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</ul>
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</div>
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<p>The ALTSEQ keyword cannot be specified with the REFACCPTH keyword.</p>
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<p>You
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must have use authority to the alternative collating sequence table. The alternative
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collating sequence table is created using the Create Table (CRTTBL) command.</p>
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<p>ALTSEQ
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causes zoned key fields to default to unsigned sequence. You can override
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the default by specifying the SIGNED keyword for individual key fields.</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 ALTSEQ keyword for a logical file.</p>
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<pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00010A ALTSEQ(TABLELIB/TABLE1)
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00020A R RECORD1 PFILE (PF1)
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00030A :
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00040A :
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00050A :
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00060A NAME 20
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00070A :
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00080A :
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00090A K NAME
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A</pre>
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<p>Records with format RECORD1 are sequenced by key NAME
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according to the alternative collating sequence table (TABLE1 in library TABLELIB).</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="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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