Wednesday, July 22, 2009

Implementing Managed Code in the Database

Importing and Configuring Assemblies



-- Enable CLR integration
sp_configure 'clr enabled', 1
GO
RECONFIGURE
GO

-- Register assembly
USE AdventureWorks

CREATE ASSEMBLY Utilities
FROM 'D:\Democode\Utilities.dll'
WITH PERMISSION_SET = Safe
GO

-- Drop assembly
DROP ASSEMBLY Utilities
GO

Creating Managed Database Objects

-- Create the managed user-defined function
Use AdventureWorks
GO
CREATE FUNCTION dbo.GetOSVersion()
RETURNS NVARCHAR(50)
AS EXTERNAL NAME Utilities.UserDefinedFunctions.GetOSVersion
GO

-- Test the managed user-defined function
SELECT dbo.GetOSVersion()
GO

-- Create managed user-defined type
CREATE TYPE Point
EXTERNAL NAME Utilities.Point
GO

-- Test the managed user-defined type
DECLARE @P Point
SET @P = '1,5'
SELECT @P.X AS X, @P.Y AS Y
GO

-- Create table using managed user-defined type
CREATE TABLE dbo.Points
(ID int IDENTITY(1,1) PRIMARY KEY, PointValue Point)
GO

INSERT INTO dbo.Points (PointValue) VALUES (CONVERT(Point, '3,4'));
INSERT INTO dbo.Points (PointValue) VALUES (CONVERT(Point, '1,5'));
INSERT INTO dbo.Points (PointValue) VALUES (CAST ('1,99' AS Point));

SELECT ID,
PointValue.X AS X,
PointValue.Y AS Y,
PointValue.ToString() AS String
FROM dbo.Points
GO

-- Clean up
DROP TABLE dbo.Points
DROP FUNCTION dbo.GetOSVersion
DROP TYPE Point
DROP ASSEMBLY Utilities
GO

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