60 lines
4.1 KiB
HTML
60 lines
4.1 KiB
HTML
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<?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="Differences in PL/I because of structure parameter passing techniques" />
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<meta name="abstract" content="The PL/I precompiler attempts to use the structure parameter passing technique, if possible. This structure parameter passing technique provides better performance for most PL/I programs using SQL." />
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<meta name="description" content="The PL/I precompiler attempts to use the structure parameter passing technique, if possible. This structure parameter passing technique provides better performance for most PL/I programs using SQL." />
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<meta name="DC.subject" content="parameter passing, differences, PL/I, structure parameter passing, PL/I program, coding SQL statements, application program" />
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<meta name="keywords" content="parameter passing, differences, PL/I, structure parameter passing, PL/I program, coding SQL statements, application program" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Differences in PL/I because of structure parameter passing techniques</title>
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</head>
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<body id="rzajppliparm"><a name="rzajppliparm"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Differences in PL/I because of structure parameter passing techniques</h1>
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<div><p>The PL/I precompiler attempts to use the structure parameter passing
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technique, if possible. This structure parameter passing technique provides
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better performance for most PL/I programs using SQL.</p>
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<div class="section"><p>The precompiler generates code where each host variable is a separate
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parameter when the following conditions are true: </p>
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<ul><li>A PL/I %INCLUDE compiler directive is found that copies external text
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into the source program.</li>
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<li>The data length of the host variables referred to in the statement is
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greater than 32703. Because SQL uses 64 bytes of the structure, 32703 + 64
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= 32767, the maximum length of a data structure.</li>
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<li>The PL/I precompiler estimates that it could possibly exceed the PL/I
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limit for user-defined names.</li>
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<li>A sign leading separate host variable is found in the host variable list
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for the SQL statement.</li>
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</ul>
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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="rzajpplone.htm" title="This topic describes the unique application and coding requirements for embedding SQL statements in an iSeries PL/I program. Requirements for host structures and host variables are defined.">Code SQL statements in PL/I applications</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="../rzajq/opens.htm">Database application design tips: Use structured parameter passing techniques</a></div>
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</div>
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</div>
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</body>
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</html>
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