100 lines
6.8 KiB
HTML
100 lines
6.8 KiB
HTML
<?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="Enhancements to IBM Toolbox for Java JDBC support for V5R4" />
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<meta name="abstract" content="Several JDBC functions were enhanced for i5/OS Version 5 Release 4." />
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<title>Enhancements to IBM Toolbox for Java JDBC support for V5R4</title>
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</head>
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<body id="jdbcenhancev5r4"><a name="jdbcenhancev5r4"><!-- --></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">Enhancements to IBM Toolbox for Java JDBC support for V5R4</h1>
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<div><p>Several JDBC functions were enhanced for i5/OS™ Version 5 Release 4.</p>
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<div class="section">Enhanced JDBC functions for i5/OS Version 5 Release 4 include:<ul><li><a href="#jdbcenhancev5r4__statementsize">2 MB statement size</a></li>
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<li><a href="#jdbcenhancev5r4__longcolumnname">128 byte column name support</a></li>
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<li><a href="#jdbcenhancev5r4__hosttrace">Database host server trace support</a></li>
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<li><a href="#jdbcenhancev5r4__ewlmcorrelator">eWLM Correlator support</a></li>
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</ul>
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<p>For information about enhanced JDBC functions for previous releases,
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see <a href="jdbcenhance.htm#jdbcenhance">Enhancements to JDBC support for Version 5 Release 3</a> and <a href="rzahhjdbcenhancev5r2.htm#rzahhjdbcenhancev5r2">Enhanced JDBC functions for i5/OS Version 5 Release 2</a>.</p>
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</div>
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<div class="section" id="jdbcenhancev5r4__statementsize"><a name="jdbcenhancev5r4__statementsize"><!-- --></a><h4 class="sectiontitle">2 MB statement size</h4><p>Prior to
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V5R4, the limit on SQL statement size was 65 535 bytes. This corresponds
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to 65 535 characters when the statement text is represented using a single-byte
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CCSID, and 32 767 characters when the statement text is represented using
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a double-byte CCSID. Some customers, particularly those using applications
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that automatically generate SQL statements, were affected by this limit.</p>
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<p>In
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V5R4, the iSeries™ statement
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size limit has been increased to two megabytes, or 2 097 152 bytes.
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The IBM<sup>®</sup> Toolbox
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for Java™ JDBC
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driver always sends statement text in two byte Unicode. Therefore, the maximum
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statement length in characters will be one megabyte or 1 048 576
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characters.</p>
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</div>
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<div class="section" id="jdbcenhancev5r4__longcolumnname"><a name="jdbcenhancev5r4__longcolumnname"><!-- --></a><h4 class="sectiontitle">128 byte column name support</h4><p>Starting
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with V5R4, the database will support column names up to 128 bytes for SQL
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tables. Prior to V5R4, column names up to 30 bytes were supported. The IBM Toolbox
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for Java JDBC
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driver will provide these possibly longer names to its users.</p>
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<p>There
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is one exception where 128 byte column names will not be returned. When local
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package caching is used and column names exceed 30 characters, the server
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will return the column names as the system column name.</p>
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</div>
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<div class="section" id="jdbcenhancev5r4__hosttrace"><a name="jdbcenhancev5r4__hosttrace"><!-- --></a><h4 class="sectiontitle">Database host server trace support</h4><p>A
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new option was added to the Toolbox for Java JDBC driver to turn on database host
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server tracing. To support this feature, option "64" was added to the "server
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trace" connection property. For more details, see <a href="jdbcproperties.htm#jdbcproperties">IBM Toolbox for Java JDBC properties</a>.</p>
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</div>
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<div class="section" id="jdbcenhancev5r4__ewlmcorrelator"><a name="jdbcenhancev5r4__ewlmcorrelator"><!-- --></a><h4 class="sectiontitle">eWLM Correlator support</h4><p>The IBM Toolbox
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for Java will
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accept an IBM Enterprise
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Workload Manager (eWLM) correlator and pass it on to the host as a connection
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attribute correlator for use with the Application Response Measurement (ARM)
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APIs. This correlator can be sent to the host at any time after a connection
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is made using the following method in the AS400JDBCConnection class:</p>
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<div class="p"><strong>setDB2eWLMCorrelator</strong><pre>public void setDB2eWLMCorrelator(byte[] bytes)
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throws SQLException</pre>
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</div>
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<p>Sets the eWLM
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Correlator. It is assumed a valid correlator value is used. If the value is
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null, all ARM/eWLM implementation will be turned off. eWLM correlators require i5/OS V5R3
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or later servers. This request is ignored when running to OS/400<sup>®</sup> V5R2
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or earlier servers. </p>
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<div class="p"><strong>Parameters</strong>:<ul><li><samp class="codeph">bytes</samp>: The eWLM correlator value</li>
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<li><samp class="codeph">SQLException</samp>: See the <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/sql/SQLException.html" target="_blank">Class SQLException</a><img src="www.gif" alt="Link
outside Information Center" /> information at the Sun Microsystems,
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Inc. Web site.</li>
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</ul>
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</div>
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<p>For information about enhanced JDBC functions for previous releases,
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see <a href="jdbcenhance.htm#jdbcenhance">Enhancements to JDBC support for Version 5 Release 3</a> and <a href="rzahhjdbcenhancev5r2.htm#rzahhjdbcenhancev5r2">Enhanced JDBC functions for i5/OS Version 5 Release 2</a>.</p>
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</div>
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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="jdbc2.htm" title="JDBC is an application programming interface (API) included in the Java platform that enables Java programs to connect to a wide range of databases.">JDBC</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> |