83 lines
5.6 KiB
HTML
83 lines
5.6 KiB
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<meta name="DC.Title" content="Prepare distributed relational database programs" />
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<meta name="abstract" content="When you write a program using SQL, you can embed the SQL statements in a host program." />
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<meta name="description" content="When you write a program using SQL, you can embed the SQL statements in a host program." />
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<title>Prepare distributed relational database programs</title>
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<body id="rbal1pdrdp"><a name="rbal1pdrdp"><!-- --></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">Prepare distributed relational database programs</h1>
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<div><p>When you write a program using SQL, you can embed the SQL statements
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in a host program. </p>
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<p>The <dfn class="term">host program</dfn> is the program that contains the SQL statements,
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written in one of the <dfn class="term">host languages</dfn>: the <span class="keyword">iSeries™</span> PL/I,
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ILE C/400<sup>®</sup>, COBOL/400<sup>®</sup>,
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ILE COBOL/400,
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FORTRAN/400, RPG/400<sup>®</sup>,
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or ILE RPG/400 programming
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language. In a host program you use variables referred to as <dfn class="term">host variables</dfn>.
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These are variables used in SQL statements that are identifiable to the host
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program. In RPG, this is called a <em>field name</em>; in FORTRAN, PL/I, and
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C, this is known as a <em>variable</em>; in COBOL, this is called a <em>data
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item</em>.</p>
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<p>You can code your distributed <span class="keyword">DB2 Universal Database™ for iSeries</span> programs
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in a way similar to the coding for a <span class="keyword">DB2<sup>®</sup> UDB for iSeries</span> program
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that is not distributed. You use the host language to embed the SQL statements
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with the host variables. Also, like a <span class="keyword">DB2 UDB for iSeries</span> program
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that is not distributed, a distributed <span class="keyword">DB2 UDB for iSeries</span> program
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is prepared using the certain processes.</p>
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<p>However, a distributed <span class="keyword">DB2 UDB for iSeries</span> program
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also requires that an SQL package is created on the application server (AS)
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to access data.</p>
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<p>This topic collection discusses these steps in the process, outlining the
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differences for a distributed <span class="keyword">DB2 UDB for iSeries</span> program.</p>
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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="rbal1precsql.htm">Precompile programs with SQL statements</a></strong><br />
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You must precompile and compile an application program containing embedded SQL statements before you can run it. Precompiling such programs is done by an SQL precompiler.</li>
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<li class="ulchildlink"><strong><a href="rbal1compil.htm">Compile an application program</a></strong><br />
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The <span class="keyword">DB2 Universal Database for iSeries</span> precompiler
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automatically calls the host language compiler after successfully
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precompiling the program, unless the *NOGEN precompiler option is specified.</li>
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<li class="ulchildlink"><strong><a href="rbal1bind.htm">Bind an application</a></strong><br />
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Before you can run your application program, a relationship between
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the program and any referred-to tables and views must be established. This
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process is called <dfn class="term">binding</dfn>.</li>
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<li class="ulchildlink"><strong><a href="rbal1tdebug.htm">Testing and debugging</a></strong><br />
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Testing and debugging distributed SQL programs is similar to testing and debugging local SQL programs, but certain aspects of the process are different.</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="rbal1program.htm" title="Programmers can write high-level language programs that use SQL statements for iSeries distributed application programs.">Application development</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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