1. DAT 405 Extreme SqlXml Irwin Dolobowsky Program Manager – SqlXml Microsoft Corporation

2. Agenda Where We’ve Been and Where We Are Xml Views – The Core of SqlXml Demo – XPath over Annotated Schema Scenario – Data Exchange Demo XPath over Annotated Schema Xml Bulkload Scenario – Decoupled Business Objects Demo XPath over Annotated Schema TemplatesUpdategrams Other Scenarios Discussion

3. Where We’ve Been Started in 1998 to allow storage and retrieval of XML data to and from SQL Server Version 1.0 of product shipped as part of SQL Server 2000 FOR XML and OpenXML in the Server Templates, ISAPI, Annotated XDR for the Client ADO/OLEDB Provider New “Web Releases” of client functionality are available via the MSDN web site: http://www.msdn.com/sqlxml Three fully supported releases since the initial SQL Server 2000 release

4. Where We Are Since Sql Server 2000 UpdategramsBulkload Annotated XSD (instead of XDR) SqlXml Managed Classes Client-Side FOR XML Web Services Support Current release – SqlXml 3.0 SP2 ID Propagation Support for Bulkload NULL Support for Web Services

5. SqlXml - Architecture SQL Server Relation views Relatio n Stored procs For XML Queries AnnotatedXSDMappingSchemas XPath Queries Updategrams XMLBulkload XSLT Relation tables

6. Xml Views Virtual Xml Document over a SQL Server database Uses XSD schemas with special annotations Annotations specify the mapping between xml and relational data Query View using XPath subset FOR XML EXPLICIT queries generated Update through view with Updategrams and Bulkload

7. Simple Mapping <xsd:schema xmlns:xsd=“http://www.w3.org/2001/XMLSchema” xmlns:sql="urn:schemas-microsoft-com:mapping-schema“> xmlns:sql="urn:schemas-microsoft-com:mapping-schema“> </xsd:schema> <Customers/> pkCustID------ANULLB Relational Data: tblCustomers Table

8. Mapping With Hierarchy <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sql="urn:schemas-microsoft-com:mapping-schema"> xmlns:sql="urn:schemas-microsoft-com:mapping-schema"><xsd:annotation> <sql:relationship name="CustOrders" parent="Customers" parent-key="CustomerID" <sql:relationship name="CustOrders" parent="Customers" parent-key="CustomerID" child="Orders" child-key="CustomerID" /> </xsd:annotation> </xsd:element></xsd:schema>

9. Storing Open Content <xsd:schema xmlns:xsd=“http://www.w3.org/2001/XMLSchema” xmlns:sql=“urn:schemas-microsoft-com:mapping-schema”> xmlns:sql=“urn:schemas-microsoft-com:mapping-schema”> </xsd:schema> Bob Bob </Customers>pkCustIDNotesANULL BNULL C Bob Bob </Customers>

10. Querying Xml Views Irwin Dolobowsky Program Manager SqlXml

11. Other Annotations Sql:is-constant Create an unmapped constant element (wrapper) Sql:hide Query element/attribute with out surfacing Sql:mapped Element/attribute is not there

12. Advantages Of The Xml View Easier to develop and maintain than For XML Explicit queries Multiple databases (with different schemas) can provide a common XML view Update back through View Decouple Shaping from Query

13. SqlXml Application Scenario Data Exchange Problem Need to Exchange Data between Companies Databases schemas are different Neither company can change database

14. SqlXml Application Scenario Abstracting the Data Source Solution – SqlXml! Agree on schema for data to exchange Produce XML from Server 1 Map database to the schema Query mapping with XPath Persist changes to Server 2 Same schema, different mapping Use Bulkload to load the data Works in reverse too

15. Data Exchange Xml Bulkload Irwin Dolobowsky Program Manager SqlXml

16. Xml Bulkload Bulkload XML documents into a SQL Server database via the XML View Supports hierarchical relationships and semi-structured data Performance is about 75% of traditional bulkload New in SP2! – Identity Propagation Values generated in Parent pushed to child before inserting

17. SqlXml Application Scenario Decoupled Business Objects Problem Mid tier performs business logic over objects Generating objects can be a hassle Objects are hierarchical, not relational Database limitations Database schema is set Want to batch updates to the database

18. SqlXml Application Scenario Decoupled Business Objects Solution – SqlXml! Use XML Serialization Produce XML from the database with XPath and Annotated Schema Use XML Serialization to produce objects from XML Persist changes to SQL Server Keep original XML Image Serialize Objects back to XML when done Produce an Updategram with the difference, send to database Use Overflow to store unconsumed data

19. Decoupled Business Objects Object Serialization with SqlXml Irwin Dolobowsky Program Manager SqlXml

20. Xml Templates Xml Document with embedded queries FOR XML T-SQL queries XPath over Annotated Schema Client-Side FOR XML Execute Non-FOR XML Stored Procs Raw, Nested (Auto*), Explicit Modes Parameterized for re-usability Post Process with XSLT

21. Updategrams Modify the database through XML View Easily represent hierarchical changes Declare before and after images of the XML Optimistic concurrency control Each updategrams generates one or more INSERT, UPDATE, and DELETE statements Each sync block carried out as a single transaction

22. Other SqlXml Scenarios Data Driven Website XPath and Xml Views to retrieve data XmlTemplates/XSLT to generate pages through ISAPI Data Storage Abstraction App works on top of XML Data Underlying storage doesn’t matter Save as files offline, to database online

23. More Information SqlXml on MSDN http://msdn.microsoft.com/sqlxml http://msdn.microsoft.com/xml Newsgroupsmicrosoft.public.sqlserver.xmlmicrosoft.public.dotnet.xml My Blog http://blogs.msdn.com/irwando Communityhttp://www.SqlXml.org

24. Attend a free chat or web cast http://www.microsoft.com/communities/chats/default.mspx http://www.microsoft.com/usa/webcasts/default.asp List of newsgroups http://communities2.microsoft.com/ communities/newsgroups/en-us/default.aspx MIcrosoft Community Sites http://www.microsoft.com/communities/default.mspx Locate Local User Groups http://www.microsoft.com/communities/usergroups/default.mspx Community sites http://www.microsoft.com/communities/related/default.mspx

25. Q1:Overall satisfaction with the session Q2:Usefulness of the information Q3:Presenter’s knowledge of the subject Q4:Presenter’s presentation skills Q5:Effectiveness of the presentation Please fill out a session evaluation on CommNet

26. © 2004 Microsoft Corporation. All rights reserved. This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.