XQuery Freeing XML and Relational Data for the Web

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XQueryFreeing XML and Relational Data for the Web

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Overview• XQuery• The XQuery API for Java (XQJ)• DataDirect XQuery• Usage Scenarios

• XML Publishing• Web Publishing• Web Services

• Gevity Customer Story

Download DataDirect XQuery: http://www.datadirect.com/downloads/registration/xquery/

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XML from Relational, XML

HOLDINGS  

USERID TICKER SHARES

Jonathan PRGS 23

Minollo PRGS 4000000

Jonathan AMZN 3000

Minollo AMZN 3000

HISTORICAL    

TICKER DATE ADJUSTEDCLOSE ACTUALCLOSE

AMZN 24-Jun-04 44.69 44.69

EBAY 24-Jun-04 85.33 85.33

PRGS 24-Jun-04 18.78 18.78

YHOO 1-Jul-04 32.48 32.48

<request> <performance> <userId>Jonathan</userId> <start>2003-01-01</start> <end>2004-06-01</end> </performance></request>

<portfolio userId="Jonathan"> <stock ticker="AMZN"> <performance> <min>18.86</min> <max>59.69</max> <daily> <day> <datetraded>2003-01-02</datetraded> <adjustedclose>22.61</adjustedclose> </day> <day> <datetraded>2003-01-09</datetraded> <adjustedclose>22.18</adjustedclose> </day> <day> <datetraded>2003-01-16</datetraded> <adjustedclose>21.93</adjustedclose> </day> <day> <datetraded>2003-01-23</datetraded> <adjustedclose>18.86</adjustedclose> </day> <day> <datetraded>2003-01-30</datetraded>

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What is XQuery?• Query Language for XML

• Find anything in an XML structure (path expressions)• Create any XML structure (constructors)• Combine data to create new structures (FLWOR expressions)

• Designed for Industrial Strength Applications• Declarative language - optimizable• Type safety

• Designed for Data Integration• Non-XML sources viewed as XML (e.g. Relational)

• Status• Candidate Recommendation• Support from most major relational vendors• 45+ implementations on W3C page• Recommendation: 1H 2006? 3Q 2006?

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Portfolio Demo: The Queries

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Portfolio Demo: XQuery Summary• FLWOR expressions

• Like SQL’s SELECT-FROM-WHERE• Allow data to be combined based on conditions

• Path expressions• Can locate anything in a document

• Constructors• Allow any result to be created• “XML Report Writing”• Web messages• Data for web sites

• XML Views of Relational Data• Unified view of relational, XML sources• Data integration• Web message processing

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What is XQJ?• XQuery API for Java (XQJ) – JSR 225• Analogous to JDBC• Status: first Early Draft Review

• Early Draft Review 2 expected very soon• Final expected shortly after XQuery 1.0 Recommendation

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XQuery and XQJ

Application XQJ

XQuery

XML Result XML Input

XML View of RDB

Dat

a So

urce

s

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XQJ: A Prepared Query// Get a connection, prepare the query

dataSource = new DDXQDataSource(); dataSource.setJdbcUrl(“jdbc:xquery:sqlserver://server1:1433;databaseName=stocks”); connection = dataSource.getConnection(); preparedExpression = connection.prepareExpression(xqueryText);

// Bind variable $l to 'Jonathan' and execute

preparedExpression.bindString(new QName("p"), "Jonathan"); xqSequence = preparedExpression.executeQuery(); System.out.println("\n\nHoldings for Jonathan:\n\n"); System.out.println(xqSequence.getSequenceAsString());

// Bind variable $l to 'Minollo' and execute

preparedExpression.bindString(new QName("p"), "Minollo"); xqSequence = preparedExpression.executeQuery(); System.out.println("\n\nHoldings for Minollo:\n\n"); System.out.println(xqSequence.getSequenceAsString());

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DataDirect XQuery• Standards-based XQuery

implementation• Simplifies XML and Relational data

integration• Industry-leading query optimization

and mediation technology• Easily embeddable – plugs into any

architecture, does not require a server

• Works with most databases and application servers

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DataDirect XQuery• XQuery for the Java platform

• Pure Java implementation• Any Java platform• Any server – or no server• Easily embeddable – installs

like JDBC driver• XQuery API for Java (XQJ)

• Database support• SQL Server 2000• Oracle 9i, 10gR1• DB2 W/U/L:  8.x • DB2 iSeries:  v5r2, v5r3 • DB2: z/OS:  8 • Sybase:  12.5

• XML sources• http: ftp: and file: schemes • XML in DOM trees

• XML Output• XML as text• XML in DOM trees • XML in SAX streams • XML in StAX streams

• Designed for performance!• Java developer IDE:

• <oXygen/> XML Editor for Eclipse (DataDirect Edition)

• Inexpensive for DataDirect XQuery 1.0 licensees

• XML IDE• Stylus Studio XML

Enterprise Edition  • Purchased separately

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Scenario: XML Publishing

XML

XML

HTML,PDF,PostScript,Paper…SQL

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Scenario: Web Publishing

App Server

HTTP

HTML

HTTP Request

Web Server

Application

XML

SQL

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Scenario: Web Services

App Server

HTTP

SOAP Request

SOAP Server

Application

XML XML

SQL

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Customer Story: Gevity

How much will it cost to outsource our HR to Gevity?

XQuery queries w/data from SalesForce.com

XML

Oracle 9i

Human Resource Data

PDF w/ pricing for prospect

• Users: Gevity sales representatives• Purpose: quickly produce price quotes from

within SalesForce.com• Data: Human Resource Data in Oracle 9i,

customer and prospect data in SalesForce.com• Can manage accounts from any internet

connection – home, office, prospect’s office, or any Wi-Fi hot spot

• Deliver through many agents – browser, cell phone, blackberry, etc

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Customer Story: GevityWhy XML?

• Easiest way to do data integration

Why XQuery? • XQuery + XQJ integrates easily into their environment• XQuery is best for manipulating data as XML• XQuery simplifies merging relational and XML • Increasingly difficult for developers to keep up with peculiarities in

proprietary XML tools – XQuery and XQJ are standards

Why DataDirect XQuery? • Easily embeddable – can live in middle tier with the application• Follows standards closer than other implementations• XQJ is like JDBC, and integrates easily into their architecture• <oXygen/> XML Editor for Eclipse – an IDE that helps with learning curve of

new language• First class support for help with queries and tuning• DataDirect’s length of time in market and financial stability

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Download DataDirect XQuery: http://www.datadirect.com/downloads/registration/xquery/

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