67 lines
4.2 KiB
HTML
67 lines
4.2 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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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Native interface considerations" />
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<meta name="abstract" content="An SQL table is a database physical file with one member (partition). Therefore, when the file is accessed by a native application, the native application reads and writes to the member by opening the file's member." />
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<meta name="description" content="An SQL table is a database physical file with one member (partition). Therefore, when the file is accessed by a native application, the native application reads and writes to the member by opening the file's member." />
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<meta name="DC.Relation" scheme="URI" content="partitionedtables.htm" />
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<meta name="DC.Relation" scheme="URI" content="../cl/rgzpfm.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Native interface considerations</title>
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</head>
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<body id="partnative"><a name="partnative"><!-- --></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">Native interface considerations</h1>
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<div><p>An SQL table is a database physical file with one member (partition).
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Therefore, when the file is accessed by a native application, the native application
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reads and writes to the member by opening the file's member.</p>
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<div class="section"><p>When the file (SQL table) becomes partitioned, the file becomes
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a multimember file and the native application needs to specify the member
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name (partition name). The native application can avoid having to specify
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a member name when reading or writing data by changing the application to
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use an SQL index that is based on all the members of the physical file. </p>
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<div class="p">For
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example, if the user created an SQL index with the following code, <pre>CREATE INDEX LIBNAME.INDEXNAME
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ON LIBNAME.TABLENAME(COLUMNNAME)
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NOT PARTITIONED</pre>
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The native application can read and write data
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from the partitioned table without having to know how the data is partitioned.</div>
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<p>When the table becomes partitioned
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(becomes a multimember file), any native operation that was previously done
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to the table must be done for each member of the multimember
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file. For example, RGZPFM FILE(LIBNAME/TABLENAME) only reorganizes the *FIRST
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member. For a partitioned table, you need to use the Reorganize Physical File
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Member (RGZPFM) command for each member. The Display File Description (DSPFD)
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command, DSPFD FILE(LIBNAME/TABLENAME) TYPE(*MBRLIST), lists all members of
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the file.</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="partitionedtables.htm" title="DB2 UDB for iSeries supports partitioned tables using SQL.">Partitioned tables</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="../cl/rgzpfm.htm">Reorganize Physical File Member (RGZPFM)</a></div>
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<div><a href="../cl/dspfd.htm">Display File Description (DSPFD)</a></div>
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</div>
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</div>
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</body>
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</html>
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