79 lines
6.1 KiB
HTML
79 lines
6.1 KiB
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<meta name="DC.Title" content="Change the attributes of your queries with the Change Query Attributes (CHGQRYA) command" />
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<meta name="abstract" content="You can modify different types of attributes of the queries that you will execute during a certain job with the Change Query Attributes (CHGQRYA) CL command, or by using the iSeries Navigator Change Query Attributes interface." />
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<meta name="DC.subject" content="change query attributes, command, CHGQRYA, CHGQRYA command" />
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<title>Change the attributes of your queries with the Change Query
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Attributes (CHGQRYA) command</title>
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</head>
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<body id="cqa"><a name="cqa"><!-- --></a>
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<img src="./delta.gif" alt="Start of change" /><!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Change the attributes of your queries with the <span class="cmdname">Change Query
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Attributes (CHGQRYA)</span> command</h1>
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<div><p>You can modify different types of attributes of the queries that
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you will execute during a certain job with the <span class="cmdname">Change Query Attributes
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(CHGQRYA)</span> CL command, or by using the iSeries™ Navigator Change Query Attributes
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interface.</p>
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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="qryoptf.htm">Control queries dynamically with the query options file QAQQINI</a></strong><br />
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The query options file QAQQINI support provides the ability to
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dynamically modify or override the environment in which queries are executed
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through the <span class="cmdname">Change Query Attributes (CHGQRYA)</span> command
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and the QAQQINI file. The query options file QAQQINI is used to set some attributes
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used by the database manager.</li>
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<li class="ulchildlink"><strong><a href="govrle.htm">Set resource limits with the Predictive Query Governor</a></strong><br />
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The <span class="keyword">DB2 Universal Database™ for iSeries</span> Predictive
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Query Governor can stop the initiation of a query if the estimated run time
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(elapsed execution time) or estimated temporary storage for the query is excessive.
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The governor acts <em>before</em> a query is run instead of while a query is
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run. The governor can be used in any interactive or batch job on the <span class="keyword">iSeries</span>. It can be used with all <span class="keyword">DB2 Universal Database™ for iSeries</span> query interfaces and is not
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limited to use with SQL queries.</li>
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<li class="ulchildlink"><strong><a href="smp0001.htm">Control parallel processing for queries</a></strong><br />
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There are two types of parallel processing available. The first
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is a parallel I/O that is available at no charge. The second is <span class="keyword">DB2<sup>®</sup> UDB Symmetric Multiprocessing</span>, a feature that you can
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purchase. You can turn parallel processing on and off. </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="queryopt.htm" title="Query optimization is an iterative process. You can gather performance information about your queries and control the processing of your queries.">Optimizing query performance using query optimization tools</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="rzajqcache.htm" title="The Plan Cache is a repository that contains the access plans for queries that were optimized by SQE.">Plan Cache</a></div>
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<div><a href="rzajq1parallel.htm" title="The DB2 UDB Symmetric Multiprocessing feature provides the optimizer with additional methods for retrieving data that include parallel processing. Symmetrical multiprocessing (SMP) is a form of parallelism achieved on a single server where multiple (CPU and I/O) processors that share memory and disk resource work simultaneously toward achieving a single end result.">Objects processed in parallel</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../cl/chgqrya.htm">Change Query Attributes (CHGQRYA) command</a></div>
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</div>
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</div>
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<img src="./deltaend.gif" alt="End of change" /></body>
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</html>
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