Native Support for Web Native Support for Web ServicesServices Native Web services accessNative Web services access

Enables cross platform Enables cross platform interoperabilityinteroperability

Reduces middle-tier dependency (no Reduces middle-tier dependency (no IIS)IIS)

Simplifies management and Simplifies management and administrationadministration

Returns results via SOAP and XMLReturns results via SOAP and XML

New HTTP ENDPOINT objectNew HTTP ENDPOINT object Encourage database object re-use Encourage database object re-use Support service oriented architecturesSupport service oriented architectures Easy maintenance via loose couplingEasy maintenance via loose coupling

SOAP/XML/HTTP

SPSPTSQL

SPSPSPSP

Non Windows

configure connection infoconfigure authenticationexpose stored procedures

expose TSQL batches

Web SvcEndpoints

Note: Requires Windows 2003

Server

Data TypesData Types

CLR-based Data TypesCLR-based Data Types

VARCHAR(MAX), VARBINARY(MAX)VARCHAR(MAX), VARBINARY(MAX)

XML DatatypeXML Datatype

.Net Framework.Net Framework

Common Language Runtime IntegrationCommon Language Runtime Integration

Ability to create database objects such as UDFs Ability to create database objects such as UDFs and Stored Procedures with VB.Net.and Stored Procedures with VB.Net.

To expose a Stored Procedure:To expose a Stored Procedure:The containing class must be publicThe containing class must be publicThe exposed method must be publicThe exposed method must be publicThe exposed method must be static (C#) or The exposed method must be static (C#) or Shared (VB)Shared (VB)

.Net Framework.Net Framework

CLR-basedCLR-based Types, Functions, & Functions, & TriggersTriggers

Developers are able to create Developers are able to create two new objects: user-defined two new objects: user-defined types and aggregates.types and aggregates.

Using VB or C# code, you can write your own aggregator functions, such as those which select results based on string or numerical properties or calculations—something you can't do in T-SQL.

Custom AggregateCustom AggregateCLR ClassCLR Class

Class is called during the aggregationClass is called during the aggregationNot just passed a set of values, but one at a timeNot just passed a set of values, but one at a timeMust be serializable (for intermediate results)Must be serializable (for intermediate results)Must implement known methodsMust implement known methods

InitInit Called at the start of the aggregation of fieldsCalled at the start of the aggregation of fields

AccumulateAccumulate Called once for each row being aggregated. It is passed Called once for each row being aggregated. It is passed

the value from the column being aggregated.the value from the column being aggregated.MergeMerge

Called to merge a temporary result into the aggregateCalled to merge a temporary result into the aggregateTerminateTerminate

Called at the end of the aggregation process to retrieve Called at the end of the aggregation process to retrieve the result of the aggregation.the result of the aggregation.

CLR ClassCLR ClassClass is called during the aggregationClass is called during the aggregationNot just passed a set of values, but one at a timeNot just passed a set of values, but one at a timeMust be serializable (for intermediate results)Must be serializable (for intermediate results)Must implement known methodsMust implement known methods

InitInit Called at the start of the aggregation of fieldsCalled at the start of the aggregation of fields

AccumulateAccumulate Called once for each row being aggregated. It is passed Called once for each row being aggregated. It is passed

the value from the column being aggregated.the value from the column being aggregated.MergeMerge

Called to merge a temporary result into the aggregateCalled to merge a temporary result into the aggregateTerminateTerminate

Called at the end of the aggregation process to retrieve Called at the end of the aggregation process to retrieve the result of the aggregation.the result of the aggregation.

Custom UDTsCustom UDTsUDTs behave just like any other data type

on the server. You can create tables with UDT columns, use UDTs as variables to stored procedures, pass them as parameters, and so on. You can define UDTs using any .NET language.

They expose properties and methods that can be invoked from T-SQL on the SQL Server.

On the client side, you can use a UDT as you would any other object. After referencing the assembly containing the UDT class, you can use that class from within your data access layer ADO.NET code.

UDTs behave just like any other data type on the server. You can create tables with UDT columns, use UDTs as variables to stored procedures, pass them as parameters, and so on. You can define UDTs using any .NET language.

They expose properties and methods that can be invoked from T-SQL on the SQL Server.

On the client side, you can use a UDT as you would any other object. After referencing the assembly containing the UDT class, you can use that class from within your data access layer ADO.NET code.

Possible UsesPossible Uses

Validate Zip Codes as part of INSERT or UPDATE with a Web Service call

User defined type of zip-code.

Field constraint that validates email address format using a regular expression.

Others ?? Speak up audience !!

Imagine the possibilities …

Validate Zip Codes as part of INSERT or UPDATE with a Web Service call

User defined type of zip-code.

Field constraint that validates email address format using a regular expression.

Others ?? Speak up audience !!

Imagine the possibilities …

.NET Integration Choices.NET Integration Choices

Choice of where to run logicChoice of where to run logic Database, for logic that runs close to dataDatabase, for logic that runs close to data Mid-tier, for logic that scales outMid-tier, for logic that scales out Symmetric programming model (same in Symmetric programming model (same in

code & db)code & db)Leverage skills middle tier & serverLeverage skills middle tier & server

Choice of programming language Choice of programming language VB.NET for a safe, modern execution VB.NET for a safe, modern execution

environmentenvironment T-SQL continues to be supported & enhancedT-SQL continues to be supported & enhanced

Remains good choice for data-intensive proceduresRemains good choice for data-intensive procedures

Safe extended stored proc (xp) Safe extended stored proc (xp) replacement replacement

Much higher performance for some Much higher performance for some scenariosscenarios

.Net Framework.Net Framework

Benefits:Benefits:

Your critical .Net processes gain the enforcement, security, scalability, and high availability characteristics of SQL Server 2005

VS 2005 VS 2005 ProjectProject

Assembly: “taxlib.dll”

VB.NetVB.Net BuildBuild

SQL ServerSQL Server

SQL Data Definition:SQL Data Definition: create assembly … create function … create procedure … create trigger … create type …SQL Queries: SQL Queries:

select sum(tax(sal,state)tax(sal,state))from Employee where county = 'King'

Runtime hosted by SQL

(in-proc)

The Developer ExperienceThe Developer Experience

-Integrated Development and Debugging

- GridView control integration

Managing AssembliesManaging Assemblies Loaded and stored inside SQL ServerLoaded and stored inside SQL Server

Cataloged Cataloged with CREATE ASSEMBLYwith CREATE ASSEMBLY Dropped with DROP ASSEMBLYDropped with DROP ASSEMBLY

Collated as sets of filesCollated as sets of files Assembly, References, PDB, source filesAssembly, References, PDB, source files

Managing AssembliesManaging Assemblies Code Access Security (CAS) for Code Access Security (CAS) for

AssembliesAssemblies Three CAS BucketsThree CAS Buckets

SAFESAFEAccess to the CLR onlyAccess to the CLR onlyNo access to external resources, thread No access to external resources, thread

management, unsafe code or interopmanagement, unsafe code or interop

EXTERNAL_ACCESSEXTERNAL_ACCESSAccess to external systems through the .NET Access to external systems through the .NET

FrameworkFrameworkE.g. EventLog, FileSystem and NetworkE.g. EventLog, FileSystem and NetworkNo access unsafe or interopNo access unsafe or interop

UNSAFEUNSAFENo restrictions; similar to extended stored proceduresNo restrictions; similar to extended stored procedures