61 lines
4.2 KiB
HTML
61 lines
4.2 KiB
HTML
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<meta name="DC.Title" content="ROWID host variables in C and C++ applications that use SQL" />
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<meta name="abstract" content="C and C++ do not have a variable that corresponds to the SQL data type ROWID. To create host variables that can be used with this data type, use the SQL TYPE IS clause. The SQL precompiler replaces this declaration with a C language structure in the output source member." />
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<meta name="DC.subject" content="ROWID host variable, C, C++, host variable, ROWID, C program, C++ program" />
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<title>ROWID host variables in C and C++ applications that use SQL</title>
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<body id="rzajpcrowid"><a name="rzajpcrowid"><!-- --></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">ROWID host variables in C and C++ applications that use SQL</h1>
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<div><p>C and C++ do not have a variable that corresponds to the SQL data
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type ROWID. To create host variables that can be used with this data type,
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use the SQL TYPE IS clause. The SQL precompiler replaces this declaration
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with a C language structure in the output source member.</p>
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<div class="section"><h4 class="sectiontitle">ROWID</h4> <pre><span><img src="./c.gif" border="0" alt="Read syntax diagram" longdesc="rzajpcrowidsyn1.htm" /></span><a href="#d0e43"><img src="./c.gif" border="0" alt="Skip visual syntax diagram" /></a>
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.-,-------------.
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V |
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>>-SQL TYPE IS ROWID----<i>variable-name</i>-+-- ; -------------------><
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</pre><a name="d0e43"></a></div>
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<div class="section"> <div class="note"><span class="notetitle">Note:</span> SQL TYPE IS ROWID can be in mixed case.</div>
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</div>
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<div class="section"><h4 class="sectiontitle"><em>ROWID Example</em></h4><p>The following declaration: </p>
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<pre>SQL TYPE IS ROWID myrowid, myrowid2;</pre>
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<p>Results
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in the generation of the following structure: </p>
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<pre>_Packed struct { short len;
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char data[40];}
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myrowid1, myrowid2;</pre>
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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="rzajpdeclaringhostc.htm" title="The C and C++ precompilers recognize only a subset of valid C and C++ declarations as valid host variable declarations.">Declare host variables in C and C++ applications that use SQL</a></div>
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</body>
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</html>
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