129 lines
7.6 KiB
HTML
129 lines
7.6 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="CPI4323 - The query access plan has been rebuilt" />
|
|
<meta name="DC.Relation" scheme="URI" content="pimes.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="cpi4351.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="cpi434c.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="cpi4351.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="cpi4323" />
|
|
<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>CPI4323 - The query access plan has been rebuilt</title>
|
|
</head>
|
|
<body id="cpi4323"><a name="cpi4323"><!-- --></a>
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">CPI4323 - The query access plan has been rebuilt</h1>
|
|
<div>
|
|
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><thead align="left"><tr><th colspan="2" align="center" valign="middle" id="d0e25">CPI4323</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody><tr valign="middle"><td valign="middle" width="26.02040816326531%" headers="d0e25 ">Message Text:</td>
|
|
<td valign="middle" width="73.9795918367347%" headers="d0e25 ">The query access plan has been rebuilt.</td>
|
|
</tr>
|
|
<tr valign="middle"><td valign="middle" width="26.02040816326531%" headers="d0e25 ">Cause Text:</td>
|
|
<td valign="middle" width="73.9795918367347%" headers="d0e25 ">The access plan was rebuilt for reason code &13. The reason codes
|
|
and their meanings follow: <ol><li>A file or member is not the same object as the one referred to in the
|
|
access plan. Some reasons include the object being re-created, restored, or
|
|
overridden to a new object.</li>
|
|
<li>Access plan was using a reusable Open Data Path (ODP), and the optimizer
|
|
chose to use a non-reusable ODP.</li>
|
|
<li>Access plan was using a non-reusable Open Data Path (ODP) and the optimizer
|
|
chose to use a reusable ODP</li>
|
|
<li>The number of records in member &3 of file &1 in library &2
|
|
has changed by more than 10%.</li>
|
|
<li>A new access path exists over member &6 of file &4 in library &5.</li>
|
|
<li>An access path over member &9 of file &7 in library &8 that
|
|
was used for this access plan no longer exists or is no longer valid.</li>
|
|
<li> The query access plan had to be rebuilt because of system programming
|
|
changes. </li>
|
|
<li>The CCSID (Coded Character Set Identifier) of the current job is different
|
|
than the CCSID used in the access plan</li>
|
|
<li>The value of one of the following is different in the current job: date
|
|
format, date separator, time format, or time separator.</li>
|
|
<li>The sort sequence table specified has changed.</li>
|
|
<li>The number of active processors or the size or paging option of the storage
|
|
pool has changed.</li>
|
|
<li>The system feature DB2<sup>®</sup> UDB Symmetric Multiprocessing has either been installed
|
|
or removed.</li>
|
|
<li>The value of the degree query attribute has changed either by the <span class="cmdname">CHGSYSVAL</span> or <span class="cmdname">CHGQRYA</span> CL
|
|
commands or with the query options file &15 in library &16.</li>
|
|
<li>A view is either being opened by a high level language open, or is being
|
|
materialized.</li>
|
|
<li>A sequence object or user-defined type or function is not the same object
|
|
as the one referred to in the access plan; or, the SQL path used to generate
|
|
the access plan is different than the current SQL path.</li>
|
|
<li>Query attributes have been specified from the query options file &15
|
|
in library &16.</li>
|
|
<li>The access plan was generated with a commitment control level that is
|
|
different in the current job.</li>
|
|
<li>The access plan was generated with a different static cursor answer set
|
|
size.</li>
|
|
<li>This is the first run of the query since a prepare or compile.</li>
|
|
<li>or greater. View the second level message text of the next message issued
|
|
(CPI4351) for an explanation of these reason codes. </li>
|
|
</ol>
|
|
If the reason code is 4, 5, 6, 20, or 21 and the file specified in the
|
|
reason code explanation is a logical file, then member &12 of physical
|
|
file &10 in library &11 is the file with the specified change.</td>
|
|
</tr>
|
|
<tr valign="middle"><td valign="middle" width="26.02040816326531%" headers="d0e25 ">Recovery Text:</td>
|
|
<td valign="middle" width="73.9795918367347%" headers="d0e25 ">Excessive rebuilds should be avoided and may indicate an application
|
|
design problem.</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
<div class="section"><p>This message can be sent for a variety of reasons. The specific
|
|
reason is provided in the message help.</p>
|
|
</div>
|
|
<div class="section"><p>Most of the time, this message is sent when the queried table
|
|
environment has changed, making the current access plan obsolete. An example
|
|
of the table environment changing is when an index required by the query no
|
|
longer exists on the server.</p>
|
|
</div>
|
|
<div class="section"><p>An access plan contains the instructions for how a query is to
|
|
be run and lists the indexes for running the query. If a needed index is no
|
|
longer available, the query is again optimized, and a new access plan is created,
|
|
replacing the old one.</p>
|
|
</div>
|
|
<div class="section"><p>The process of again optimizing the query and building a new access
|
|
plan at runtime is a function of <span class="keyword">DB2 UDB for iSeries™</span>.
|
|
It allows a query to be run as efficiently as possible, using the most current
|
|
state of the database without user intervention.</p>
|
|
</div>
|
|
<div class="section"><p>The infrequent appearance of this message is not a cause for action.
|
|
For example, this message will be sent when an SQL package is run the first
|
|
time after a restore, or anytime the optimizer detects that a change has occurred
|
|
(such as a new index was created), that warrants an implicit rebuild. However,
|
|
excessive rebuilds should be avoided because extra query processing will occur.
|
|
Excessive rebuilds may indicate a possible application design problem or inefficient
|
|
database management practices.</p>
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="pimes.htm" title="You can evaluate the structure and performance of the given SQL statements in a program using informational messages put in the job log by the database manager.">Query optimization performance information messages</a></div>
|
|
</div>
|
|
<div class="relref"><strong>Related reference</strong><br />
|
|
<div><a href="cpi4351.htm">CPI4351 - Additional reason codes for query access plan has been rebuilt.</a></div>
|
|
<div><a href="cpi434c.htm">CPI434C - The query access plan was not rebuilt</a></div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html> |