59 lines
3.4 KiB
HTML
59 lines
3.4 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8"?>
|
||
|
|
<!DOCTYPE html
|
||
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html lang="en-us" xml:lang="en-us">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
|
<meta name="security" content="public" />
|
||
|
|
<meta name="Robots" content="index,follow" />
|
||
|
|
<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))' />
|
||
|
|
<meta name="DC.Type" content="reference" />
|
||
|
|
<meta name="DC.Title" content="Use parameter markers or the NULL value as function arguments" />
|
||
|
|
<meta name="abstract" content="An important restriction involves both parameter markers and the NULL value." />
|
||
|
|
<meta name="description" content="An important restriction involves both parameter markers and the NULL value." />
|
||
|
|
<meta name="DC.subject" content="UDFs (User-defined functions), calling, parameter markers in functions, examples, parameter markers, in functions example" />
|
||
|
|
<meta name="keywords" content="UDFs (User-defined functions), calling, parameter markers in functions, examples, parameter markers, in functions example" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="rbafyudfuudf.htm" />
|
||
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
|
||
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
|
||
|
|
<meta name="DC.Format" content="XHTML" />
|
||
|
|
<meta name="DC.Identifier" content="rbafyuseparameter" />
|
||
|
|
<meta name="DC.Language" content="en-us" />
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
||
|
|
<title>Use parameter markers or the NULL value as function arguments</title>
|
||
|
|
</head>
|
||
|
|
<body id="rbafyuseparameter"><a name="rbafyuseparameter"><!-- --></a>
|
||
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
||
|
|
<h1 class="topictitle1">Use parameter markers or the NULL value as function arguments</h1>
|
||
|
|
<div><p>An important restriction involves both parameter markers and the
|
||
|
|
NULL value.</p>
|
||
|
|
<div class="section"><p>You cannot code the following: </p>
|
||
|
|
<pre> BLOOP(?)</pre>
|
||
|
|
</div>
|
||
|
|
<div class="section"><p>or </p>
|
||
|
|
</div>
|
||
|
|
<div class="example"> <pre> BLOOP(NULL)</pre>
|
||
|
|
</div>
|
||
|
|
<div class="section"><p>Since function resolution does not know what data type the argument
|
||
|
|
may turn out to be, it cannot resolve the reference. You can use the CAST
|
||
|
|
specification to provide a data type for the parameter marker or NULL value
|
||
|
|
that function resolution can use:</p>
|
||
|
|
<pre> BLOOP(CAST(? AS INTEGER))</pre>
|
||
|
|
</div>
|
||
|
|
<div class="section"><p>or </p>
|
||
|
|
</div>
|
||
|
|
<div class="example"> <pre> BLOOP(CAST(NULL AS INTEGER))</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div>
|
||
|
|
<div class="familylinks">
|
||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafyudfuudf.htm" title="Scalar and column UDFs can be called within an SQL statement almost everywhere that an expression is valid. Table UDFs can be called in the FROM clause of a SELECT. There are a few restrictions of UDF usage, however.">Use UDFs in SQL statements</a></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|