70 lines
4.3 KiB
HTML
70 lines
4.3 KiB
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="Use host variables in REXX applications that use SQL" />
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<meta name="abstract" content="REXX does not provide for variable declarations." />
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<meta name="description" content="REXX does not provide for variable declarations." />
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<meta name="DC.subject" content="host variable, REXX, variable, host, : (colon)" />
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<meta name="keywords" content="host variable, REXX, variable, host, : (colon)" />
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<meta name="DC.Relation" scheme="URI" content="rzajpdeterminerexx.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzajpoutputrexx.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Use host variables in REXX applications that use SQL</title>
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</head>
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<body id="rzajphostvariablesrexx"><a name="rzajphostvariablesrexx"><!-- --></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">Use host variables in REXX applications that use SQL</h1>
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<div><p>REXX does not provide for variable declarations.</p>
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<div class="section"><p>LOB, ROWID, and binary host variables are not supported in REXX.
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New variables are recognized by their appearance in assignment statements.
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Therefore, there is no declare section, and the BEGIN DECLARE SECTION and
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END DECLARE SECTION statements are not supported.</p>
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<p>All host variables
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within an SQL statement must be preceded by a colon (:).</p>
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</div>
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<div class="section"><p>The SQL/REXX interface performs substitution in compound variables
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before passing statements to the database manager. For example:</p>
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<pre>a = 1
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b = 2
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EXECSQL 'OPEN c1 USING :x.a.b'</pre>
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<p>causes the contents of x.1.2
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to be passed to SQL.</p>
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</div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzajpdeterminerexx.htm">Determine data types of input host variables in REXX applications that use SQL</a></strong><br />
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All data in REXX is in the form of strings.</li>
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<li class="ulchildlink"><strong><a href="rzajpoutputrexx.htm">The format of output host variables in REXX applications that use SQL</a></strong><br />
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It is not necessary to determine the data type of an <em>output
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host variable</em> (that is, a host variable used in an 'INTO host variable'
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clause in a FETCH statement).</li>
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<li class="ulchildlink"><strong><a href="rzajpavoidingrexx.htm">Avoid REXX conversion in REXX applications that use SQL</a></strong><br />
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To guarantee that a string is not converted to a number or assumed to be of graphic type, strings should be enclosed in the following: "'". Simply enclosing the string in single quotation marks does not work.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzajprexx.htm" title="REXX procedures do not have to be preprocessed. At run time, the REXX interpreter passes statements that it does not understand to the current active command environment for processing.">Code SQL statements in REXX 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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