258 lines
16 KiB
HTML
258 lines
16 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="Override files with different file types" />
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<meta name="abstract" content="Use this information to learn how the system processes a file that is changed to a different type of file." />
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<meta name="description" content="Use this information to learn how the system processes a file that is changed to a different type of file." />
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<meta name="DC.Relation" scheme="URI" content="fredr.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="fredif" />
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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>Override files with different file types</title>
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</head>
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<body id="fredif"><a name="fredif"><!-- --></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">Override files with different file types</h1>
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<div><p>Use this information to learn how the system processes a file that
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is changed to a different type of file.</p>
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<p>If you change to a different type of file, the system ignores the device-dependent
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characteristics and reads or writes the records sequentially. The program
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must specify some device parameters in the new device file or the override.
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The system takes default parameters for others. This manual describes the
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effect of specific redirection combinations later in this section.</p>
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<p>The system ignores any attributes specified on overrides of a different
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file type than the final file type. The parameters SPOOL, SHARE, OPNSCOPE,
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and SECURE are exceptions
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to this rule. The system accepts the above parameters from any override to
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the file, regardless of device type.</p>
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<p>Some redirection combinations present special problems due to the specific
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characteristics of the device. In particular:</p>
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<ul><li>Do not use file redirection for save files.</li>
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<li>You can redirect nonsequentially processed database files only to another
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database file or a DDM file.</li>
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<li>You can redirect display files and ICF files that use multiple devices
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(MAXDEV or MAXPGMDEV > 1) only to a display file or ICF file.</li>
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<li>Redirecting a display file to any other file type, or another file type
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to a display file, requires: <ul><li>That the program be recompiled, with the override active, if there are
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any input-only or output only fields.</li>
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</ul>
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This is necessary because the display file omits these unused fields
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from the record buffer, but other file types do not.</li>
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</ul>
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<p><a href="#fredif__filer">Table 1</a> summarizes valid file redirections.</p>
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<div class="tablenoborder"><a name="fredif__filer"><!-- --></a><table cellpadding="4" cellspacing="0" summary="" id="fredif__filer" width="100%" frame="hsides" border="1" rules="rows"><caption>Table 1. File redirections</caption><thead align="left"><tr><th rowspan="2" align="left" valign="bottom" width="15.370705244122965%" id="d0e110">To-file</th>
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<th colspan="6" align="center" valign="bottom" id="d0e112">From-file</th>
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</tr>
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<tr><th align="left" valign="bottom" width="13.381555153707053%" id="d0e115">Printer</th>
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<th align="left" valign="bottom" width="14.10488245931284%" id="d0e117">ICF</th>
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<th align="left" valign="bottom" width="14.466546112115733%" id="d0e119">Diskette</th>
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<th align="left" valign="bottom" width="14.10488245931284%" id="d0e121">Display</th>
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<th align="left" valign="bottom" width="14.466546112115733%" id="d0e123">Database</th>
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<th align="left" valign="bottom" width="14.10488245931284%" id="d0e125">Tape</th>
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</tr>
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</thead>
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<tbody><tr><td align="left" valign="top" width="15.370705244122965%" headers="d0e110 ">Printer</td>
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<td align="center" valign="top" width="13.381555153707053%" headers="d0e112 d0e115 ">O*</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e117 ">O</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 ">O</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 ">O</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 ">O</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 ">O</td>
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</tr>
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<tr><td rowspan="3" align="left" valign="top" width="15.370705244122965%" headers="d0e110 ">ICF</td>
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<td align="center" valign="top" width="13.381555153707053%" headers="d0e112 d0e115 "> </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e117 ">I/O </td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 "> </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 ">I/O </td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 "> </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 "> </td>
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</tr>
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<tr><td align="center" valign="top" width="13.381555153707053%" headers="d0e112 d0e115 ">O</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e117 ">O</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 ">O</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 ">O</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 ">O</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 ">O</td>
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</tr>
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<tr><td valign="top" width="13.381555153707053%" headers="d0e112 d0e115 "> </td>
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<td align="center" valign="top" headers="d0e112 d0e117 ">I</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 ">I</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 ">I</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 ">I</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 ">I</td>
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</tr>
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<tr><td rowspan="2" align="left" valign="top" width="15.370705244122965%" headers="d0e110 ">Diskette </td>
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<td align="center" valign="top" width="13.381555153707053%" headers="d0e112 d0e115 "> O </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e117 "> O </td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 "> O </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 "> O </td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 "> O </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 "> O </td>
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</tr>
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<tr><td valign="top" width="13.381555153707053%" headers="d0e112 d0e115 "> </td>
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<td align="center" valign="top" headers="d0e112 d0e117 ">I</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 ">I</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 ">I</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 ">I</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 ">I</td>
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</tr>
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<tr><td rowspan="3" align="left" valign="top" width="15.370705244122965%" headers="d0e110 ">Display </td>
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<td align="center" valign="top" width="13.381555153707053%" headers="d0e112 d0e115 "> </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e117 ">I/O </td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 "> </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 ">I/O </td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 "> </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 "> </td>
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</tr>
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<tr><td align="center" valign="top" width="13.381555153707053%" headers="d0e112 d0e115 ">O</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e117 ">O</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 ">O</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 ">O</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 ">O</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 ">O</td>
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</tr>
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<tr><td valign="top" width="13.381555153707053%" headers="d0e112 d0e115 "> </td>
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<td align="center" valign="top" headers="d0e112 d0e117 ">I</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 ">I</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 ">I</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 ">I</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 ">I</td>
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</tr>
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<tr><td rowspan="2" align="left" valign="top" width="15.370705244122965%" headers="d0e110 ">Database </td>
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<td align="center" valign="top" width="13.381555153707053%" headers="d0e112 d0e115 "> O </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e117 "> O </td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 "> O </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 "> O </td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 "> O </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 "> O </td>
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</tr>
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<tr><td valign="top" width="13.381555153707053%" headers="d0e112 d0e115 "> </td>
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<td align="center" valign="top" headers="d0e112 d0e117 ">I</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 ">I</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 ">I</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 ">I</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 ">I</td>
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</tr>
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<tr><td rowspan="2" align="left" valign="top" width="15.370705244122965%" headers="d0e110 ">Tape </td>
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<td align="center" valign="top" width="13.381555153707053%" headers="d0e112 d0e115 "> O </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e117 ">O </td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 "> O </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 "> O </td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 "> O </td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 "> O </td>
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</tr>
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<tr><td valign="top" width="13.381555153707053%" headers="d0e112 d0e115 "> </td>
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<td align="center" valign="top" headers="d0e112 d0e117 ">I</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e119 ">I</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e121 ">I</td>
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<td align="center" valign="top" width="14.466546112115733%" headers="d0e112 d0e123 ">I</td>
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<td align="center" valign="top" width="14.10488245931284%" headers="d0e112 d0e125 ">I</td>
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</tr>
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<tr><td colspan="7" align="left" valign="top" headers="d0e110 d0e112 d0e115 d0e117 d0e119 d0e121 d0e123 d0e125 "> <ul><li>I=input file O=output file I/O=input/output file</li>
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<li>*=redirection to a different type of printer</li>
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</ul>
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</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>To use <a href="#fredif__filer">Table 1</a>, identify the file type to override
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in the FROM-FILE columns and the file type to override in the TO-FILE column.
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The intersection specifies an I or O or both, meaning that the substitution
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is valid for these two file types when used as input files or as output files.</p>
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<p>For instance, you can override a diskette output file with a tape output
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file, and a diskette input file with a tape input file. The chart refers to
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file type substitutions only. That is, you cannot change the program function
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by overriding an input file with an output file.</p>
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<p>The following charts describe the specific defaults taken andwhat to ignore for each
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redirection combination.</p>
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<div class="fignone"><dl><dt class="dlterm">From:</dt>
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<dd>Diskette Input</dd>
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<dt class="dlterm">To:</dt>
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<dd>ICF: Records are retrieved from the ICF file
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one at a time. <p>Display: Records are retrieved from the display one at
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a time. Type in the data for each record and press the Enter key when the
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record is complete. A nonfield-level device file must be specified. Diskette
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label information is ignored.</p>
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<p>Database: Records are retrieved in sequential
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order. Diskette label information is ignored.</p>
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<p>Tape: Records are retrieved
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in sequential order. If a label value is specified in the program, that value
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is used as the label for the tape file.</p>
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</dd>
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</dl>
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</div>
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<div class="fignone"><dl><dt class="dlterm">From:</dt>
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<dd>Diskette output</dd>
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<dt class="dlterm">To:</dt>
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<dd>ICF: Records are written
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to the ICF file one at a time. <p>Database: Records are written to the database
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in sequential order.</p>
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<p>Display: Records are written to the display with
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each record overlaying the previous record. You can request each output record
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using the Enter key.</p>
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<p>Printer: Records are printed and folding or truncating
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is performed as specified in the printer file.</p>
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<p>Tape: Records are written
|
|||
|
|
on tape in sequential order.</p>
|
|||
|
|
</dd>
|
|||
|
|
</dl>
|
|||
|
|
</div>
|
|||
|
|
<div class="fignone"><dl><dt class="dlterm">From:</dt>
|
|||
|
|
<dd>Tape input</dd>
|
|||
|
|
<dt class="dlterm">To:</dt>
|
|||
|
|
<dd>ICF: Records are retrieved from the ICF file
|
|||
|
|
one at a time. <p>Display: Records are retrieved from the display one at
|
|||
|
|
a time. Type in the data for each record and press the Enter key when the
|
|||
|
|
record is complete. A nonfield-level device file must be specified. Tape
|
|||
|
|
label information is ignored.</p>
|
|||
|
|
<p>Database: Records are retrieved in sequential
|
|||
|
|
order. One record is read as a single field. Tape label information is ignored.</p>
|
|||
|
|
<p>Diskette:
|
|||
|
|
Records are retrieved in sequential order. If a label value is specified
|
|||
|
|
in the program, that value is used as the label for the diskette file.</p>
|
|||
|
|
</dd>
|
|||
|
|
</dl>
|
|||
|
|
</div>
|
|||
|
|
<div class="fignone"><dl><dt class="dlterm">From:</dt>
|
|||
|
|
<dd>Tape Output</dd>
|
|||
|
|
<dt class="dlterm">To:</dt>
|
|||
|
|
<dd>Printer: Records are printed, and folding or
|
|||
|
|
truncating is performed as specified in the printer file. <p>ICF: Records
|
|||
|
|
are written to the ICF file one at a time. Tape label information is ignored.</p>
|
|||
|
|
<p>Diskette:
|
|||
|
|
The amount of data written on diskette depends on the exchange type of the
|
|||
|
|
diskette. If a label value is specified in the program, that value is used
|
|||
|
|
as the label for the diskette file.</p>
|
|||
|
|
<p>Display: Records are written to
|
|||
|
|
the display with each record overlaying the previous record. You can request
|
|||
|
|
each output record using the Enter key.</p>
|
|||
|
|
<p>Database: Records are written
|
|||
|
|
to the database in sequential order.</p>
|
|||
|
|
</dd>
|
|||
|
|
</dl>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div>
|
|||
|
|
<div class="familylinks">
|
|||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="fredr.htm" title="Learn what file redirection is and how it can be used.">File redirection</a></div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</body>
|
|||
|
|
</html>
|