80 lines
5.3 KiB
HTML
80 lines
5.3 KiB
HTML
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<meta name="DC.Title" content="Access members with DDM" />
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<meta name="abstract" content="Members are supported for database I/O operations only if the target server is an iSeries server or a System/38. Members are not supported if the target server is neither an iSeries server nor a System/38." />
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<meta name="DC.subject" content="member access, considerations" />
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<title>Access members with DDM</title>
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</head>
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<body id="rbae5mbraccess"><a name="rbae5mbraccess"><!-- --></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">Access members with DDM</h1>
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<div><p>Members are supported for database I/O operations only if the target
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server is an <span class="keyword">iSeries™ server</span> or a <span class="keyword">System/38™</span>. Members are not supported
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if the target server is neither an <span class="keyword">iSeries server</span> nor
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a <span class="keyword">System/38</span>.</p>
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<div class="section"><p>Members can be locked before use, using the <span class="cmdname">Allocate
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Object (ALCOBJ)</span> command if the target server is an <span class="keyword">iSeries server</span> or
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a <span class="keyword">System/38</span>.</p>
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</div>
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<div class="section"><p>The DDM file itself does not have members like a database file.
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However, if a member is identified on the source server (for example, using
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the <span class="cmdname">Override with Database File (OVRDBF)</span> command) and the
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target server is an <span class="keyword">iSeries server</span> or
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a <span class="keyword">System/38</span>, that member name
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is used to identify a member in the target server's file. When the target
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server is neither an <span class="keyword">iSeries server</span> nor
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a <span class="keyword">System/38</span>, and if the member
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name is specified as *FIRST, or in some cases *LAST, or the file name is the
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same as the member name, then the RMTFILE parameter values in the DDM file
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are sent without change. This allows file access on servers that do not support
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members.</p>
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</div>
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<div class="section"><p>If the member name is other than *FIRST or in some cases *LAST,
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or the file name is different from the member name (for example, when the
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file is opened) and the target server does not support members, an error message
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is sent to the requesting program and the function is not performed.</p>
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</div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rbae5expmbrs.htm">Example: Access DDM remote members (iSeries server only)</a></strong><br />
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These examples show how access to a DDM file becomes an indirect
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reference (by using DDM) to a member of a file on a remote <span class="keyword">iSeries server</span>.
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These examples are <span class="keyword">iSeries server</span>-to-<span class="keyword">iSeries server</span> examples.</li>
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<li class="ulchildlink"><strong><a href="rbae5exspec.htm">Example: DDM file that opens a specific member</a></strong><br />
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A specific file member can be specified in the RMTFILE parameter,
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which is used only on the <span class="cmdname">Create DDM File (CRTDDMF)</span> and <span class="cmdname">Change
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DDM File (CHGDDMF)</span> commands, by using the *NONSTD value followed
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by the file, library, and member name.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbae5ddmop.htm" title="This topic provides task-oriented information and examples that describe various aspects of DDM operation considerations.">Operating considerations for DDM</a></div>
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