62 lines
3.7 KiB
HTML
62 lines
3.7 KiB
HTML
<?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 name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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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: BLOB string search" />
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<meta name="abstract" content="In this example, you want the FINDSTRING function to work on BLOBs as well as on CLOBs. To do this, you define another FINDSTRING taking BLOB as the first parameter:" />
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<meta name="description" content="In this example, you want the FINDSTRING function to work on BLOBs as well as on CLOBs. To do this, you define another FINDSTRING taking BLOB as the first parameter:" />
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<meta name="DC.subject" content="examples, search string and BLOBs, CREATE FUNCTION statement, BLOB string search example" />
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<meta name="keywords" content="examples, search string and BLOBs, CREATE FUNCTION statement, BLOB string search example" />
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<meta name="DC.Relation" scheme="URI" content="rbafyudfdudf.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="rbafyudfcfxa" />
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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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<!-- 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: BLOB string search </title>
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</head>
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<body id="rbafyudfcfxa"><a name="rbafyudfcfxa"><!-- --></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: BLOB string search </h1>
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<div><p>In this example, you want the FINDSTRING function
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to work on BLOBs as well as on CLOBs. To do this, you define another FINDSTRING
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taking BLOB as the first parameter: </p>
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<div class="section"><pre> <strong>CREATE FUNCTION</strong> FINDSTRING (<strong>BLOB</strong>(500K), <strong>VARCHAR</strong>(200))
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<strong>RETURNS INTEGER</strong>
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<strong>CAST FROM FLOAT</strong>
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<strong>SPECIFIC</strong> FINDSTRING_BLOB
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<strong>EXTERNAL NAME</strong> 'MYLIB/MYPGM(FINDSTR)'
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<strong>LANGUAGE C
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PARAMETER STYLE DB2SQL
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NO SQL
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DETERMINISTIC
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NO EXTERNAL ACTION
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RETURNS NULL ON NULL INPUT</strong></pre>
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</div>
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<div class="section"><p>This example illustrates overloading of the UDF name and shows
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that multiple UDFs can share the same program. Note that although a BLOB
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cannot be assigned to a CLOB, the same source code can be used. There is
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no programming problem in the above example as the interface for BLOB and
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CLOB between DB2<sup>®</sup> and
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the UDF program is the same: length followed by data.</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="rbafyudfdudf.htm" title="A UDF must be registered in the database before the function can be recognized and used by SQL.">Register UDFs</a></div>
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</div>
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</div>
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</body>
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</html> |