64 lines
4.0 KiB
HTML
64 lines
4.0 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.Type" content="reference" />
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<meta name="DC.Title" content="Correctly end a called RPG/400 program that uses SQL" />
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<meta name="abstract" content="SQL run time builds and maintains data areas (internal SQLDAs) for each SQL statement which contains host variables." />
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<meta name="description" content="SQL run time builds and maintains data areas (internal SQLDAs) for each SQL statement which contains host variables." />
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<meta name="DC.subject" content="RPG/400 program, ending, using LR indicator, using RETRN statement, LR indicator, ending RPG/400 programs, RETRN statement, application program, coding SQL statements, RPG/400" />
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<meta name="keywords" content="RPG/400 program, ending, using LR indicator, using RETRN statement, LR indicator, ending RPG/400 programs, RETRN statement, application program, coding SQL statements, RPG/400" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Correctly end a called RPG/400 program that uses SQL</title>
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</head>
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<body id="rzajpendingrpg"><a name="rzajpendingrpg"><!-- --></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">Correctly end a called RPG/400 program that uses SQL</h1>
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<div><p>SQL run time builds and maintains data areas (internal SQLDAs)
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for each SQL statement which contains host variables. </p>
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<div class="section"><p>These internal SQLDAs are built the first time the statement is
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run and then reused on subsequent executions of the statement to increase
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performance. The internal SQLDAs can be reused as long as there is at least
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one SQL program active. The SQL precompiler allocates static storage used
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by SQL run time to manage the internal SQLDAs properly.</p>
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</div>
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<div class="section"><p>If an RPG/400<sup>®</sup> program containing SQL is called from another
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program which also contains SQL, the RPG/400 program should not set the Last
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Record (LR) indicator on. Setting the LR indicator on causes the static storage
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to be re-initialized the next time the RPG/400 program is run. Re-initializing
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the static storage causes the internal SQLDAs to be rebuilt, thus causing
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a performance degradation.</p>
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</div>
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<div class="section"><p>An RPG/400 program
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containing SQL statements that is called by a program that also contains SQL
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statements, should be ended one of two ways:</p>
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<ul><li>By the RETRN statement</li>
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<li>By setting the RT indicator on.</li>
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</ul>
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<p> This allows the internal SQLDAs to be used again and reduces the
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total run time.</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="rzajprpg.htm" title="The RPG/400 licensed program supports both RPG II and RPG III programs.">Code SQL statements in RPG/400 applications</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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