61 lines
3.8 KiB
HTML
61 lines
3.8 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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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Example 3: Dynamically join database files without DDS" />
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<meta name="abstract" content="This example shows how to use mapped fields as join fields when dynamically joining database files without DDS." />
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<meta name="description" content="This example shows how to use mapped fields as join fields when dynamically joining database files without DDS." />
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<meta name="DC.Relation" scheme="URI" content="rbafodynjf.htm" />
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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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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rbafodynjfex3" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Example 3: Dynamically join database files without DDS</title>
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</head>
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<body id="rbafodynjfex3"><a name="rbafodynjfex3"><!-- --></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">Example 3: Dynamically join database files without DDS</h1>
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<div><p>This example shows how to use mapped fields as join fields when
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dynamically joining database files without DDS.</p>
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<div class="section"><div class="p">You can use fields defined on the MAPFLD parameter for either
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one of the join field pairs. This is useful when the key in the secondary
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file is defined as a single field (for example, a 6-character date field)
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and there are separate fields for the same information (for example, month,
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day, and year) in the primary file. Assume that FILEA has character fields <em>Year,
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Month</em>, and <em>Day</em> and needs to be joined to FILEB which has the <em>Date</em> field
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in YYMMDD format. Assume that you have defined file JOINAB with
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the required format. You can specify: <pre>OVRDBF FILE(JOINAB) TOFILE(FILEA) SHARE(*YES)
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OPNQRYF FILE(FILEA FILEB) FORMAT(JOINAB) +
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JFLD((YYMMDD FILEB/DATE)) +
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MAPFLD((YYMMDD 'YEAR *CAT MONTH *CAT DAY'))
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CALL PGM(PGME) /* Created using file JOINAB as input */
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CLOF OPNID(FILEA)
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DLTOVR FILE(JOINAB)</pre>
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</div>
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</div>
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<div class="section"><p>The MAPFLD parameter defines the <em>YYMMDD</em> field as the concatenation
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of several fields from FILEA. You do not need to specify field attributes
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(for example, length or type) for the <em>YYMMDD</em> field on the MAPFLD parameter
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because the system calculates the attributes from the expression.</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="rbafodynjf.htm" title="The dynamic join function allows you to join files without having to first specify data description specifications (DDS) and create a join logical file.">Dynamically join database files without DDS</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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