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<h1 class="topictitle1">Example: Sourced UDFs involving UDTs</h1>
<div><p><span>Suppose you have defined a sourced UDF on
the built-in SUM function to support SUM on Euros.</span></p>
<div class="section"><p>The function statement is as follows:</p>
<pre> <strong>CREATE FUNCTION</strong> <strong>SUM</strong> (EURO)
<strong>RETURNS</strong> EURO
<strong>SOURCE</strong> SYSIBM.SUM (<strong>DECIMAL</strong>())</pre>
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<div class="section"><p>You want to know the total of sales in Germany for each product
in the year of 2004. You want to obtain the total sales in U.S. dollars:</p>
<pre> <strong>SELECT</strong> PRODUCT_ITEM, US_DOLLAR (<strong>SUM</strong> (TOTAL))
<strong>FROM</strong> GERMAN_SALES
<strong>WHERE</strong> YEAR = 2004
<strong>GROUP BY</strong> PRODUCT_ITEM</pre>
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<div class="section"><p>You cannot write <samp class="codeph"><strong>SUM</strong> (US_DOLLAR (TOTAL))</samp>,
unless you had defined a SUM function on U.S. dollar in a manner similar to
the above.</p>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafyexampudt.htm" title="These are examples of using UDTs.">Examples: Use UDTs</a></div>
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<div class="relref"><strong>Related reference</strong><br />
<div><a href="rbafyasdudt.htm" title="Suppose you have defined two sourced UDFs on the built-in SUM function to support SUM on U.S. and Canadian dollars, similar to the UDF sourced on Euros in the Example: Sourced UDFs involving UDTs.">Example: Assignments involving different UDTs</a></div>
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