83 lines
4.9 KiB
HTML
83 lines
4.9 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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<meta name="DC.Title" content="Use host structure arrays in RPG/400 applications that use SQL" />
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<meta name="abstract" content="A host structure array is defined as an occurrence data structure. An occurrence data structure can be used on the SQL FETCH statement when fetching multiple rows." />
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<meta name="description" content="A host structure array is defined as an occurrence data structure. An occurrence data structure can be used on the SQL FETCH statement when fetching multiple rows." />
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<meta name="DC.subject" content="arrays of host structures, using arrays, RPG/400, host structure, RPG/400 program, array, declaring, occurrence data structure, FETCH statement, multiple-row, INSERT statement, blocked" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Use host structure arrays in RPG/400 applications that use SQL</title>
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</head>
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<body id="rzajphostarrayrpg"><a name="rzajphostarrayrpg"><!-- --></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 structure arrays in RPG/400<sup>®</sup> applications that use SQL</h1>
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<div><p>A host structure array is defined as an occurrence data structure.
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An occurrence data structure can be used on the SQL FETCH statement when fetching
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multiple rows.</p>
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<div class="section"><p>In these examples, the following are true: </p>
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<ul><li>All items in BARRAY must be valid host variables.</li>
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<li>All items in BARRAY must be contiguous. The first FROM position must be
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1 and there cannot be overlaps in the TO and FROM positions.</li>
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<li>For all statements other than the multiple-row FETCH and blocked INSERT,
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if an occurrence data structure is used, the current occurrence is used. For
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the multiple-row FETCH and blocked INSERT, the occurrence is set to 1.</li>
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</ul>
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<pre>*...1....+....2....+....3....+....4....+....5....+....6....+....7. ..*
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IBARRAY DS 10
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I 01 20 C1VAR
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I B 21 220C2VAR
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</pre>
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</div>
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<div class="section"><p>The following example uses a host structure array called DEPT
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and a multiple-row FETCH statement to retrieve 10 rows from the DEPARTMENT
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table.</p>
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<pre> *...1....+....2....+....3....+....4....+....5....+....6....+....7...*
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E INDS 4 4 0
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IDEPT DS 10
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I 01 03 DEPTNO
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I 04 32 DEPTNM
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I 33 38 MGRNO
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I 39 41 ADMRD
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IINDARR DS 10
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I B 1 80INDS
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…
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C/EXEC SQL
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C+ <strong>DECLARE</strong> C1 <strong>CURSOR FOR</strong>
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C+ <strong>SELECT</strong> *
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C+ <strong>FROM</strong> CORPDATA.DEPARTMENT
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C/END-EXEC
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C/EXEC SQL
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C+ <strong>OPEN</strong> C1
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C/END-EXEC
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C/EXEC SQL
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C+ <strong>FETCH</strong> C1 <strong>FOR</strong> 10 <strong>ROWS</strong> <strong>INTO</strong> :DEPT:INDARR
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C/END-EXEC</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="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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