96 lines
5.3 KiB
HTML
96 lines
5.3 KiB
HTML
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<meta name="DC.Title" content="Example: Assignments involving different UDTs" />
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<meta name="abstract" content="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." />
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<title>Example: Assignments involving different UDTs </title>
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</head>
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<body id="rbafyasdudt"><a name="rbafyasdudt"><!-- --></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: Assignments involving different UDTs </h1>
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<div><p><span>Suppose you have defined two sourced UDFs
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on the built-in SUM function to support SUM on U.S. and Canadian dollars,
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similar to the UDF sourced on Euros in the Example: Sourced UDFs involving
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UDTs.</span></p>
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<div class="section"><pre>
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<strong>CREATE FUNCTION SUM</strong> (CANADIAN_DOLLAR)
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<strong>RETURNS</strong> CANADIAN_DOLLAR
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<strong>SOURCE</strong> SYSIBM.SUM (<strong>DECIMAL</strong>())
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<strong>CREATE FUNCTION SUM</strong> (US_DOLLAR)
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<strong>RETURNS</strong> US_DOLLAR
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<strong>SOURCE</strong> SYSIBM.SUM (<strong>DECIMAL</strong>())</pre>
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</div>
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<div class="section"><p>Now suppose your supervisor requests that you maintain the annual
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total sales in U.S. dollars of each product and in each country, in separate
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tables:</p>
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<pre>
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<strong>CREATE TABLE</strong> US_SALES_04
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(PRODUCT_ITEM <strong>INTEGER</strong>,
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TOTAL US_DOLLAR)
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<strong>CREATE TABLE</strong> GERMAN_SALES_04
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(PRODUCT_ITEM <strong>INTEGER</strong>,
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TOTAL US_DOLLAR)
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<strong>CREATE TABLE</strong> CANADIAN_SALES_04
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(PRODUCT_ITEM <strong>INTEGER</strong>,
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TOTAL US_DOLLAR)
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<strong>INSERT INTO</strong> US_SALES_04
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<strong>SELECT</strong> PRODUCT_ITEM, <strong>SUM</strong> (TOTAL)
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<strong>FROM</strong> US_SALES
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<strong>WHERE</strong> YEAR = 2004
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<strong>GROUP BY</strong> PRODUCT_ITEM
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<strong>INSERT INTO</strong> GERMAN_SALES_04
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<strong>SELECT</strong> PRODUCT_ITEM, US_DOLLAR (<strong>SUM</strong> (TOTAL))
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<strong>FROM</strong> GERMAN_SALES
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<strong>WHERE</strong> YEAR = 2004
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<strong>GROUP BY</strong> PRODUCT_ITEM
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<strong>INSERT INTO</strong> CANADIAN_SALES_04
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<strong>SELECT</strong> PRODUCT_ITEM, US_DOLLAR (<strong>SUM</strong> (TOTAL))
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<strong>FROM</strong> CANADIAN_SALES
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<strong>WHERE</strong> YEAR = 2004
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<strong>GROUP BY</strong> PRODUCT_ITEM</pre>
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</div>
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<div class="section"><p>You explicitly cast the amounts in Canadian dollars
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and Euros to U.S. dollars since different UDTs are not directly
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assignable to each other. You cannot use the cast specification syntax because
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UDTs can only be cast to their own source type.</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="rbafyexampudt.htm" title="These are examples of using UDTs.">Examples: Use UDTs</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="rbafyudsrc.htm" title="Suppose you have defined a sourced UDF on the built-in SUM function to support SUM on Euros.">Example: Sourced UDFs involving UDTs</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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