80 lines
4.8 KiB
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80 lines
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<title>Example 2: Change a physical file description and attributes</title>
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<body id="rbafochgpfdaex2"><a name="rbafochgpfdaex2"><!-- --></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 2: Change a physical file description and attributes</h1>
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<div><p>This example shows how to create new versions of files in the same
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library.</p>
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<div class="section"> <p>To create new versions of files in the same library, follow these
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steps:</p>
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<ol><li>Create a new physical file with a different record format in the same
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library the old physical file is in. The names of the old and new files should
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be different. (The old physical file FILEPFA is in library LIBA and has two
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members MBRA1 and MBRA2.) <pre>CRTPF FILE(LIBA/FILEPFB) MAXMBRS(2)...</pre>
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</li>
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<li>Copy the members of the old physical file to the new physical file. <pre>CPYF FROMFILE(LIBA/FILEPFA) TOFILE(LIBA/FILEPFB)
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FROMMBR(*ALL) TOMBR(*FROMMBR)
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FMTOPT(*MAP *DROP) MBROPT(*REPLACE)</pre>
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</li>
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<li>Create a new logical file in the same library as the old logical file
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is in. The names of the old and new files should be different. (You can use
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the FORMAT keyword to use the same record formats as are in the current logical
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file if no changes need be made to the record formats.) The PFILE keyword
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must refer to the new physical file created in step 1. The old logical file
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FILELFA is in library LIBA. <pre>CRTLF FILE(LIBA/FILELFB)</pre>
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</li>
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<li>Delete the old logical and physical files. <pre>DLTF FILE(LIBA/FILELFA)
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DLTF FILE(LIBA/FILEPFA)</pre>
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</li>
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<li>Rename the new logical file to the name of the old logical file. (If you
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also decide to rename the physical file, be sure to change the DDS for logical
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file so that the PFILE keyword refers to the new physical file name.) <pre>RNMOBJ(LIBA/FILELFB) OBJTYPE(*FILE) NEWOBJ(FILELFA)</pre>
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</li>
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<li>If the logical file member should be renamed, and assume that the
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default was used on the Create Logical File (CRTLF) command, issue the following
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command:<pre>RNMM FILE(LIBA/FILELFA) MBR(FILELFB) NEWMBR(FILELFA)</pre>
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</li>
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</ol>
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</div>
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<div class="section"><p>You can use the Change Physical File (CHGPF) command to change
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some of the attributes of a physical file and its members. </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="rbafochgpfda.htm" title="Sometimes when you make a change to a physical file description and then re-create the file, the level identifier can change. If the level identifier changes, you can either compile the program again or avoid recompiling using a logical file.">Change a physical file description and attributes</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="../rbam6/rbam6clmain.htm">Control language (CL)</a></div>
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</div>
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