102 lines
5.2 KiB
HTML
102 lines
5.2 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.Title" content="Restrictions" />
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<meta name="abstract" content="There are some restrictions for a partitioned table." />
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<meta name="description" content="There are some restrictions for a partitioned table." />
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<meta name="DC.subject" content="Partitioned tables, restrictions" />
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<meta name="keywords" content="Partitioned tables, restrictions" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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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>Restrictions</title>
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</head>
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<body id="partrestrict"><a name="partrestrict"><!-- --></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">Restrictions</h1>
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<div><p>There are some restrictions for a partitioned table.</p>
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<ul><li>Referential constraints are not allowed for a partitioned table.</li>
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<li>If a primary key constraint for a partitioned table is added and then
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dropped, the primary key index is also dropped.</li>
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<li>If a primary key constraint is added to a partitioned table, and then
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removed by the user, the user is not allowed to keep the table keyed.</li>
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<li>If an existing nonpartitioned table does not have a primary key constraint,
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but the table is keyed, the keys are removed when the table is changed to
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a partitioned table.</li>
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<li>DB2<sup>®</sup> Multisystem
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files (distributed tables) are already partitioned across multiple servers
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and cannot be partitioned across multiple members on a single system.</li>
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<li>An update to the partitioning key that attempts to move a row to a different
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partition is not allowed.</li>
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<li>The number of partitioning keys is restricted to 120.</li>
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<li>All SQL relative record processing is handled
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as it is for DB2 Multisystem
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support. The relative record number is determined in each individual partition,
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not the table as a whole. For example, reading to record 27 means that you
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read to record 27 in each partition. Each partition can contain its own record
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27, none of which is the same.</li>
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<li>There are some restrictions on the data type of a partition key column.
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For range partitioning, the data type of a column used to partition a table
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cannot be BLOB, CLOB, DBCLOB, DATALINK, floating-point type, or a distinct
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type based on the these types. For hash partitioning, the data type of the
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column used as part of the partition key cannot be LOB, DATE, TIME, TIMESTAMP,
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floating-point type, or a distinct type based on one of these.</li>
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<li>Applications using the following CL commands must be changed to use <samp class="codeph">Member
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*ALL</samp> to process all partitions of a partitioned table: <ul><li><a href="../cl/clrpfm.htm">Clear Physical
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File Member (CLRPFM)</a></li>
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<li><a href="../cl/cpyfrmimpf.htm">Copy from
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Import File (CPYFRMIMPF)</a></li>
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<li><a href="../cl/cpytoimpf.htm">Copy to Import
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File (CPYTOIMPF)</a></li>
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<li><a href="../cl/dltnetf.htm">Delete Network
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File (DLTNETF)</a></li>
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<li><a href="../cl/opnqryf.htm">Open Query
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File (OPNQRYF)</a></li>
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<li><a href="../cl/runqry.htm">Run Query (RUNQRY)</a></li>
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<li><a href="../cl/wrkobjlck.htm">Work with
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Object Locks (WRKOBJLCK)</a></li>
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<li><a href="../cl/apyjrnchg.htm">Apply Journaled
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Changes (APYJRNCHG)</a></li>
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<li><a href="../cl/apyjrnchgx.htm">Apply Journaled
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Changes Extend (APYJRNCHGX)</a></li>
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<li><a href="../cl/dspjrn.htm">Display Journal
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(DSPJRN)</a></li>
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<li><a href="../cl/rcvjrne.htm">Receive Journal
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Entry (RCVJRNE)</a></li>
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<li><a href="../cl/rmvjrnchg.htm">Remove Journaled
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Changes (RMVJRNCHG)</a></li>
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<li><a href="../cl/rtvjrne.htm">Retrieve Journal
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Entry (RTVJRNE)</a></li>
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<li><a href="../cl/rstobj.htm">Restore Object
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(RSTOBJ)</a></li>
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<li><a href="../cl/savobj.htm">Save Object
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(SAVOBJ)</a></li>
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<li><a href="../cl/savrstobj.htm">Save Restore
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Object (SAVRSTOBJ)</a></li>
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</ul>
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</li>
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</ul>
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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>
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</body>
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</html>
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