This document contains snippets of code from different programming languages and data formats including XQuery, JSON, XML, and SQL. It demonstrates how XQuery can be used for tasks like querying data, updating databases, interacting with web services, and integrating with other languages and technologies like JavaScript, HTML, Java, and SQL. Key advantages of XQuery highlighted include its powerful and flexible data model, its ability to seamlessly invoke other languages and technologies, and its potential for high performance and productivity.

1. 28 msec
XQuery 3 Rocks
http://www.zorba-xquery.com
William Candillon - FOSDEM 2012

10. Harnessing Flexible Data

11. {
"photos": {
"page": 1,
"pages": 94276,
"total": "1414129",
"photo": [{
"id": "3891667770",
"owner": "354683133120"
<kml>
<Placemark>
<name>Simple placemark</name>
<Point>
<coordinates>-122.0822035425683,37.422289901
40251,0</coordinates>

12. {
"photos": {
"page": 1,
"pages": 94276,
"total": "1414129",
"photo": [{
"id": "3891667770",
"owner": "354683133120"
<kml>
✔
<Placemark>
<name>Simple placemark</name>
<Point>
<coordinates>-122.0822035425683,37.422289901
40251,0</coordinates>

13. {
"photos": {
"page": 1,
"pages": 94276,
"total": "1414129",
"photo": [{
"id": "3891667770",
"owner": "354683133120"
?
<kml>
✔
<Placemark>
<name>Simple placemark</name>
<Point>
<coordinates>-122.0822035425683,37.422289901
40251,0</coordinates>
? ?

14. Meet XQuery

15. XQuery
• Family of Specification from w3c
• Most Complex Complete Data Model
• Talks Natively to Web
• Query, Store, Index, Update, Full-Text
• Unified Framework
• Optimization & Parallelization

16. Meet Zorba
Open Source XQuery Processor
Contributors: Oracle, 28msec, FLWOR
All Flavors Available Runs Everywhere
Rich Module Libraries Developer Tools
Pluggable Store Fun & Productive

17. Zorba

18. <div id=”entries”>{
for $entry in $entries
let $title := string($entry/@title)
where $entry/@author = “anonymous”
order by $entry/@datetime
return <h1>{$title}</h1>
}</div>

19. insert node <entry>Hello World</entry>
into $entries

20. let $x := <m>breakfast of champions</m>
return $x contains text "meal"
using thesaurus at
"http://wordnet.princeton.edu"
relationship "narrower term"

21. let $handler :=
function($request){
let $world := $request/text()
return
<h1>Hello {$world}!</h1>
}
return mongoose:start($handler, 80);
mongoose:cin();

22. declare
%http:get(“/hello/{$world}”)
function html:hello($world)
{
<h1>Hello {$world}!</h1>
};

24. Client Server
<script type="application/xquery">
declare sequential function local:submit($loc, declare sequential function guestbook:add(
$evtObj) $author as xs:string, $entry as xs:string
{ ){
let $date := fn:current-dateTime()
let $name := s:id("author")/data(@value) let $entry := <entry author="{$author}"
let $text := s:id("text")/text() datetime="{$date}">{$text}</entry>
return return
guestbook:add($name, $text); xqddf:insert-nodes-last($entries, $entry);
}; };
b:addEventListener(s:id("submit"), declare sequential function guestbook:list() {
"onclick", <entries>{
local:submit#2); xqddf:collection($entries)
}</entries>;
guestbook:list(); };
</script>

25. Client Server
<script type="application/xquery">
declare sequential function local:submit($loc, declare sequential function guestbook:add(
$evtObj) $author as xs:string, $entry as xs:string
{ ){
let $date := fn:current-dateTime()
let $name := s:id("author")/data(@value) let $entry := <entry author="{$author}"
let $text := s:id("text")/text() datetime="{$date}">{$text}</entry>
return return
guestbook:add($name, $text); xqddf:insert-nodes-last($entries, $entry);
}; };
b:addEventListener(s:id("submit"), declare sequential function guestbook:list(){
"onclick", <entries>{
local:submit#2); xqddf:collection($entries)
}</entries>;
guestbook:list(); };
</script>
Seamless Invocations

29. AWS Libraries (2011)
Java XQuery
8589
Lines of code
2905
2309
1469
572 455
S3 SimpleDB SNS

30. AWS Libraries (2011)
Java XQuery
13803
Lines of Codes
Lines of code
- 80%
2496
AWS

31. AWS Libraries (2011)
PHP XQuery
6531
Lines of Codes
Lines of code
2496
- 62%
AWS

32. <html>
<head>
<script type='text/javascript'>
function buy(e) {
newElement = document.createElement("p");
elementText = document.createTextNode
(e.target.getAttribute(id));
newElement.appendChild(elementText);
var res = document.evaluate(
"//div[@id='shoppingcart']",
document, null,
XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
HTML
null);
res.snapshotItem(0).appendChild("newElement");}
</script> JavaScript
</head>
<body>
<div>Shopping cart</div>
<div id="shoppingcart"></div>
<%
XPath
// Code establishing connection
ResultSet results =
statement.executeQuery ("SELECT * FROM PRODUCTS");
while (results.next()) {
out.println("<div>");
Java
String prodName = results.getString(1);
out.println(prodName);
SQL
out.println("<input type='button' value='Buy'");
out.println("id='"+prodName+"'");
out.println("onclick='buy(event)'/>").
out.println("</div>");
}
results.close();
// Code closing connection
%>
</body>
</html>

33. <html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script type='application/xquery'>
declare updating function local:buy($evt, $obj) {
insert node <p>{$obj/@id}</p> as first
into //div[@id="shoppingcart"]
};
b:addEventListener(b:dom()//input,
"onclick",
xs:Qname("local:buy"));
</script>
</head>
<body>
<div>Shopping cart</div>
<div id="shoppingcart">{
XQuery Everywhere
for $p in doc("products.xml")//*:product
return
<div>
{$p/*:name}
<input type='button'
value='Buy'
id='{$p/*:name}'/>
</div>
}</div>
</body>
</html>

34. let $stats := [ { "response_time":
0.05 ... } ...]
for $stat in j:values($stats)
let $url := $stat("http_action")
order by $url
return
{
"url": $url,
"avg": avg($stat("response_time"))
}

35. $zorba -q jsoniq.xq -f
{ "url" : "GET /docs/spec/en-US/html-
single/index.html", "avg" : 0.05 }

36. Take away
• Powerful Data Model
• Flexible Programming Model
• Productivity
• Performance

38. 28 msec
Thank you!