75 lines
4.5 KiB
HTML
75 lines
4.5 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="Error processing for UDFs" />
|
||
|
|
<meta name="abstract" content="When an error is encountered when processing a UDF, the system follows a specified model." />
|
||
|
|
<meta name="description" content="When an error is encountered when processing a UDF, the system follows a specified model." />
|
||
|
|
<meta name="DC.subject" content="table function, UDFs (User-defined functions), error processing, scalar function, UDFs (User-defined functions), scalar function" />
|
||
|
|
<meta name="keywords" content="table function, UDFs (User-defined functions), error processing, scalar function, UDFs (User-defined functions), scalar function" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="rbafywudfextern.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="rbafyudferror" />
|
||
|
|
<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>Error processing for UDFs</title>
|
||
|
|
</head>
|
||
|
|
<body id="rbafyudferror"><a name="rbafyudferror"><!-- --></a>
|
||
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
||
|
|
<h1 class="topictitle1">Error processing for UDFs</h1>
|
||
|
|
<div><p>When an error is encountered when processing a UDF, the system
|
||
|
|
follows a specified model.</p>
|
||
|
|
<div class="section"><h4 class="sectiontitle">Table function error processing</h4><p>The error processing
|
||
|
|
model for table function calls is as follows: </p>
|
||
|
|
</div>
|
||
|
|
<div class="section"> <ol><li>If FIRST call fails, no further calls are made.</li>
|
||
|
|
<li>If FIRST call succeeds, the nested OPEN, FETCH, and CLOSE calls are made,
|
||
|
|
and the FINAL call is always made.</li>
|
||
|
|
<li>If OPEN call fails, no FETCH or CLOSE call is made.</li>
|
||
|
|
<li>If OPEN call succeeds, then FETCH and CLOSE calls are made.</li>
|
||
|
|
<li>If a FETCH call fails, no further FETCH calls are made, but the CLOSE
|
||
|
|
call is made.</li>
|
||
|
|
</ol>
|
||
|
|
</div>
|
||
|
|
<div class="section"> <div class="note"><span class="notetitle">Note:</span> This model describes the ordinary error processing for table
|
||
|
|
UDFs. In the event of a system failure or communication problem, a call indicated
|
||
|
|
by the error processing model may not be made. </div>
|
||
|
|
</div>
|
||
|
|
<div class="section"><h4 class="sectiontitle">Scalar function error processing</h4><p>The error processing
|
||
|
|
model for scalar UDFs, which are defined with the FINAL CALL specification,
|
||
|
|
is as follows: </p>
|
||
|
|
</div>
|
||
|
|
<div class="section"> <ol><li>If FIRST call fails, no further calls are made. </li>
|
||
|
|
<li>If FIRST call succeeds, then further NORMAL calls are made as warranted
|
||
|
|
by the processing of the statement, and a FINAL call is always made.</li>
|
||
|
|
<li>If NORMAL call fails, no further NORMAL calls are made, but the FINAL
|
||
|
|
call is made (if you have specified FINAL CALL). This means that if an error
|
||
|
|
is returned on a FIRST call, the UDF must clean up before returning, because
|
||
|
|
no FINAL call will be made. </li>
|
||
|
|
</ol>
|
||
|
|
</div>
|
||
|
|
<div class="section"> <div class="note"><span class="notetitle">Note:</span> This model describes the ordinary error processing for scalar
|
||
|
|
UDFs. In the event of a system failure or communication problem, a call indicated
|
||
|
|
by the error processing model may not be made.</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div>
|
||
|
|
<div class="familylinks">
|
||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafywudfextern.htm" title="You can write the executable code of a UDF in a language other than SQL.">Write UDFs as external functions</a></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|