79 lines
6.1 KiB
HTML
79 lines
6.1 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE html
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html lang="en-us" xml:lang="en-us">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="security" content="public" />
|
|
<meta name="Robots" content="index,follow" />
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
|
<meta name="DC.Type" content="reference" />
|
|
<meta name="DC.Title" content="Change the attributes of your queries with the Change Query Attributes (CHGQRYA) command" />
|
|
<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." />
|
|
<meta name="description" 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." />
|
|
<meta name="DC.subject" content="change query attributes, command, CHGQRYA, CHGQRYA command" />
|
|
<meta name="keywords" content="change query attributes, command, CHGQRYA, CHGQRYA command" />
|
|
<meta name="DC.Relation" scheme="URI" content="queryopt.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="qryoptf.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="govrle.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="smp0001.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="rzajqcache.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="rzajq1parallel.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="../cl/chgqrya.htm" />
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
|
|
<meta name="DC.Format" content="XHTML" />
|
|
<meta name="DC.Identifier" content="cqa" />
|
|
<meta name="DC.Language" content="en-us" />
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
|
<title>Change the attributes of your queries with the Change Query
|
|
Attributes (CHGQRYA) command</title>
|
|
</head>
|
|
<body id="cqa"><a name="cqa"><!-- --></a>
|
|
<img src="./delta.gif" alt="Start of change" /><!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">Change the attributes of your queries with the <span class="cmdname">Change Query
|
|
Attributes (CHGQRYA)</span> command</h1>
|
|
<div><p>You can modify different types of attributes of the queries that
|
|
you will execute during a certain job with the <span class="cmdname">Change Query Attributes
|
|
(CHGQRYA)</span> CL command, or by using the iSeries™ Navigator Change Query Attributes
|
|
interface.</p>
|
|
</div>
|
|
<div>
|
|
<ul class="ullinks">
|
|
<li class="ulchildlink"><strong><a href="qryoptf.htm">Control queries dynamically with the query options file QAQQINI</a></strong><br />
|
|
The query options file QAQQINI support provides the ability to
|
|
dynamically modify or override the environment in which queries are executed
|
|
through the <span class="cmdname">Change Query Attributes (CHGQRYA)</span> command
|
|
and the QAQQINI file. The query options file QAQQINI is used to set some attributes
|
|
used by the database manager.</li>
|
|
<li class="ulchildlink"><strong><a href="govrle.htm">Set resource limits with the Predictive Query Governor</a></strong><br />
|
|
The <span class="keyword">DB2 Universal Database™ for iSeries</span> Predictive
|
|
Query Governor can stop the initiation of a query if the estimated run time
|
|
(elapsed execution time) or estimated temporary storage for the query is excessive.
|
|
The governor acts <em>before</em> a query is run instead of while a query is
|
|
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
|
|
limited to use with SQL queries.</li>
|
|
<li class="ulchildlink"><strong><a href="smp0001.htm">Control parallel processing for queries</a></strong><br />
|
|
There are two types of parallel processing available. The first
|
|
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
|
|
purchase. You can turn parallel processing on and off. </li>
|
|
</ul>
|
|
|
|
<div class="familylinks">
|
|
<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>
|
|
</div>
|
|
<div class="relconcepts"><strong>Related concepts</strong><br />
|
|
<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>
|
|
<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>
|
|
</div>
|
|
<div class="relinfo"><strong>Related information</strong><br />
|
|
<div><a href="../cl/chgqrya.htm">Change Query Attributes (CHGQRYA) command</a></div>
|
|
</div>
|
|
</div>
|
|
<img src="./deltaend.gif" alt="End of change" /></body>
|
|
</html> |