74 lines
4.5 KiB
HTML
74 lines
4.5 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="DB2 Universal Database for iSeries to DB2 Universal Database for iSeries blocking" />
|
||
|
|
<meta name="DC.subject" content="stored procedure, use" />
|
||
|
|
<meta name="keywords" content="stored procedure, use" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="rbal1facblk.htm" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="../cl/sbmrmtcmd.htm" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="../cl/ovrdbf.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="rbal1block1" />
|
||
|
|
<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>DB2 Universal Database for iSeries to DB2 Universal Database for iSeries blocking</title>
|
||
|
|
</head>
|
||
|
|
<body id="rbal1block1"><a name="rbal1block1"><!-- --></a>
|
||
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
||
|
|
<h1 class="topictitle1"><span class="keyword">DB2 Universal Database™ for iSeries™</span> to <span class="keyword">DB2 Universal Database for iSeries</span> blocking</h1>
|
||
|
|
<div><div class="section"><p>Blocking will not occur if:</p>
|
||
|
|
<ul><li>The cursor is updatable (see <a href="rbal1blocksummary.htm">note
|
||
|
|
1</a>).</li>
|
||
|
|
<li>The cursor is potentially updatable (see <a href="rbal1blocksummary.htm">note
|
||
|
|
2</a>).</li>
|
||
|
|
<li>The ALWBLK(*NONE) precompile option was used.</li>
|
||
|
|
<li>The commitment control level is *CS and the level of OS/400<sup>®</sup> is earlier
|
||
|
|
than V3R1.</li>
|
||
|
|
<li>The commitment control level is *ALL and the outer subselect does not
|
||
|
|
contain one of the following items: <ul><li>The DISTINCT keyword</li>
|
||
|
|
<li>The UNION operator</li>
|
||
|
|
<li>An ORDER BY clause and the sum of the lengths of the fields in the clause
|
||
|
|
requires a sort</li>
|
||
|
|
<li>A reference to a server database file (server database files are those
|
||
|
|
in library QSYS named <samp class="codeph">QADBxxxx</samp>, and any views built over
|
||
|
|
those files)</li>
|
||
|
|
</ul>
|
||
|
|
</li>
|
||
|
|
<li>The row size is greater than approximately 2 KB or, if the <span class="cmdname">Submit
|
||
|
|
Remote Command (SBMRMTCMD)</span> command or a stored procedure was used
|
||
|
|
to extend the size of the default AS database buffer, the row size is greater
|
||
|
|
than approximately half of the size of the database buffer resulting from
|
||
|
|
specification of the <span class="cmdname">Override with Database File (OVRDBF)</span> command
|
||
|
|
SEQONLY number-of-records parameter. (Note that for the (<span class="cmdname">OVRDBF</span>)
|
||
|
|
command to work remotely, OVRSCOPE(*JOB) must be specified.)</li>
|
||
|
|
<li>The cursor is declared to be scrollable (DECLARE...SCROLL CURSOR...) and
|
||
|
|
a scroll option specified in a FETCH statement is one of the following: RELATIVE,
|
||
|
|
PRIOR, or CURRENT (unless a multiple-row FETCH was done, as mentioned previously.)</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div>
|
||
|
|
<div class="familylinks">
|
||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rbal1facblk.htm" title="A very important performance factor is whether blocking occurs when data is transferred between the application requester (AR) and the application server (AS). A group of rows transmitted as a block of data requires much less communications overhead than the same data sent one row at a time.">Factors that affect blocking for DRDA</a></div>
|
||
|
|
</div>
|
||
|
|
<div class="relinfo"><strong>Related information</strong><br />
|
||
|
|
<div><a href="../cl/sbmrmtcmd.htm">Submit Remote Command (SBMRMTCMD) command</a></div>
|
||
|
|
<div><a href="../cl/ovrdbf.htm">Override with Database File (OVRDBF) command</a></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|