XQuery by Priscilla Walmsley
Author:Priscilla Walmsley
Language: eng
Format: epub, pdf
Publisher: O'Reilly Media, Inc.
Published: 2015-12-02T05:00:00+00:00
local:price-list(doc("prices.xml"),local:price-based-on-discount#1)
Example 23-4. Price list generation with function for discount algorithm
xquery version "3.0"; declare function local:price-list ($price-doc as document-node(), $price-calc-func as function(element(prod)) as xs:decimal) { <html> <head> <title>Price List</title> <link href="companystandard.css"/> </head> <body> <h1>Price List</h1> <table> <tr> <th>Prod number</th> <th>Price</th> </tr> {for $prod in $price-doc//priceList[@effDate < current-date()]/prod return <tr> <td>{data($prod/@num)}</td> <td>{$price-calc-func($prod)}</td> </tr> }</table> </body> </html> }; declare function local:price-based-on-discount ($prod as element(prod)) as xs:decimal { if (exists($prod/discount)) then xs:decimal($prod/price) - xs:decimal($prod/discount) else xs:decimal($prod/price) }; declare function local:price-based-on-percent ($prod as element(prod)) as xs:decimal { xs:decimal($prod/price) * .90 };
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