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Ejemplo de transacciones CLR

En este ejemplo se muestra cómo controlar las transacciones mediante las API administradas ubicadas en el System.Transactions espacio de nombres. En concreto, la System.Transactions.TransactionScope clase se usa para establecer un límite de transacción para garantizar que las cifras de inventario no se ajusten a menos que haya suficiente inventario para cubrir la solicitud y, si hay suficiente inventario, que la transferencia del inventario de una ubicación a otra se produce de forma atómica. El registro automático en una transacción distribuida se muestra mediante el registro de cambios en el inventario en una base de datos de auditoría almacenada en una instancia independiente de SQL Server.

Prerrequisitos

Para crear y ejecutar este proyecto, debe instalarse el siguiente software:

  • SQL Server o SQL Server Express. Puede obtener SQL Server Express de forma gratuita desde el sitio web de documentación y ejemplos de SQL Server Express.

  • La base de datos AdventureWorks que está disponible en el sitio web para desarrolladores de SQL Server

  • SDK de .NET Framework 2.0 o posterior o Microsoft Visual Studio 2005 o posterior. Puede obtener el SDK de .NET Framework de forma gratuita.

  • Además, se deben cumplir las siguientes condiciones:

  • La instancia de SQL Server que usa debe tener habilitada la integración clR.

  • Para habilitar la integración clR, realice los pasos siguientes:

    Habilitar la integración con CLR

    • Ejecute los siguientes comandos Transact-SQL:

    sp_configure 'clr enabled', 1

    GO

    RECONFIGURE

    GO

    Nota:

    Para habilitar CLR, debe tener ALTER SETTINGS permiso de nivel de servidor, que se mantiene implícitamente en los miembros de los sysadmin roles fijos de servidor y serveradmin .

  • La base de datos AdventureWorks debe instalarse en la instancia de SQL Server que está usando.

  • Si no es administrador para la instancia de SQL Server que usa, debe tener un permiso de administrador para crearAssembly para completar la instalación.

Compilar el ejemplo

Cree y ejecute el ejemplo mediante las instrucciones siguientes:

  1. Abra un símbolo del sistema de Visual Studio o .NET Framework.

  2. Si es necesario, cree un directorio para el ejemplo. En este ejemplo, usaremos C:\MySample.

  3. Dado que en este ejemplo se requiere un ensamblado firmado, cree una clave asimétrica escribiendo el comando :

    sn -k SampleKey.snk

  4. Compile el código de ejemplo desde el símbolo de la línea de comandos ejecutando uno de los siguientes, según su elección de idioma.

    • Vbc /reference:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\System.Core.dll","C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\System.Data.DataSetExtensions.dll","C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Data.dll","C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll","C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Transactions.dll","C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Xml.dll" /keyfile:Key.snk /target:Library /out:Transaction.dll InventoryMover.vb

    • Csc /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Data.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Transactions.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Xml.dll /keyfile:key.snk /out:Transaction.dll /target:library InventoryMover.cs

  5. Copie el código de instalación Transact-SQL en un archivo y guárdelo como install.sql en el directorio de ejemplo.

  6. Implementación del ensamblado y el procedimiento almacenado mediante la ejecución

    • sqlcmd -E -I -i install.sql -v root = "C:\MySample\"

  7. Copie el código de instalación de la base de datos Transact-SQL en un archivo y guárdelo como installDB.sql en el directorio de ejemplo.

  8. Instalación de la base de datos de auditoría mediante la ejecución

    • Sqlcmd -S server_name [ \instance_name ] -E -I -i installDB.sql

    con los valores adecuados de la instancia y el servidor.

  9. Copie Transact-SQL script de comando de prueba en un archivo y guárdelo como test.sql en el directorio de ejemplo.

  10. Ejecute el script de prueba con el comando siguiente.

    • sqlcmd -E -I -i test.sql

  11. Copie el script de limpieza de base de datos Transact-SQL en un archivo y guárdelo como cleanupDB.sql en el directorio de ejemplo.

  12. Ejecute el script con el comando siguiente.

    • Sqlcmd -S server_name [ \instance_name ] -E -I -i cleanup.sql

      con los valores adecuados de la instancia y el servidor.

  13. Copie el script de limpieza Transact-SQL en un archivo y guárdelo como cleanup.sql en el directorio de ejemplo.

  14. Ejecute el script con el comando siguiente.

    • sqlcmd -E -I -i cleanup.sql

Código de ejemplo

A continuación se muestran las listas de código de este ejemplo.

C#

using System;  
using System.Collections.Generic;  
using System.Text;  
using System.Data;  
using System.Data.SqlTypes;  
using System.Data.SqlClient;  
using System.Transactions;  
using Microsoft.SqlServer.Server;  
using System.Security.Principal;  
  
    public static class InventoryMover  
    {  
        const string contextConnectionString = "context connection=true";  
  
        // **********  
        // Important: Change this connection string to refer to a server other than the one  
        // you have installed the AdventureWorks database.  This sample demonstrates   
        // two-phase commit across multiple servers, and loopback to the same server is not  
        // permitted from CLR integrated based stored procedures.  
        // **********  
        const string auditConnectionString = "server=<YourServer>; database=InventoryAudit; user=<YourUser>; password=<YourPassword>";  
  
        [SqlMethod(DataAccess = DataAccessKind.Read, IsMutator = true)]  
        public static void ExecuteTransfer(int productID, short fromLocationID,  
            short toLocationID, short quantityToTransfer)  
        {  
                       // Establish bounds of the transaction  
            using (TransactionScope transScope = new TransactionScope())  
            {  
                using (SqlConnection adventureworksConnection = new  
                   SqlConnection(contextConnectionString))  
                {  
                    // Opening adventureworksConnection automatically enlists it in the   
                    // TransactionScope as part of the transaction.  
                    adventureworksConnection.Open();  
  
                    SqlCommand checkCommand = adventureworksConnection.CreateCommand();  
                    checkCommand.CommandText = "SELECT TOP 1 Quantity"  
                        + " FROM Production.ProductInventory WITH (REPEATABLEREAD)"  
                        + " WHERE ProductID = @ProductID AND LocationID = @LocationID;";  
                    checkCommand.Parameters.Add("@ProductID", SqlDbType.Int);  
                    checkCommand.Parameters[0].Value = productID;  
                    checkCommand.Parameters.Add("@LocationID", SqlDbType.Int);  
                    checkCommand.Parameters[1].Value = fromLocationID;  
  
                    object result = checkCommand.ExecuteScalar();  
                    short availableQuantity = (short)result;  
  
                    if (availableQuantity < quantityToTransfer)  
                        //It would be better to throw a custom error, and in some cases to actually  
                        //RAISERROR.  Also, it would be better to map product IDs and location IDs to   
                        //names for the error message.  
                        throw new ArgumentOutOfRangeException("quantityToTransfer",  
                            string.Format("Attempt to transfer {0} of product {1} from"  
                                + " location {2} but only {3} is available.",  
                                quantityToTransfer, productID, fromLocationID,  
                                availableQuantity));  
  
                    //Remove inventory count from source  
                    SqlCommand reduceCommand = adventureworksConnection.CreateCommand();  
                    reduceCommand.CommandText = "UPDATE Production.ProductInventory"  
                        + " SET Quantity = Quantity - @QuantityToTransfer"  
                        + " WHERE ProductID = @ProductID AND LocationID = @LocationID;";  
                    reduceCommand.Parameters.Add("@ProductID", SqlDbType.Int);  
                    reduceCommand.Parameters[0].Value = productID;  
                    reduceCommand.Parameters.Add("@LocationID", SqlDbType.SmallInt);  
                    reduceCommand.Parameters[1].Value = fromLocationID;  
                    reduceCommand.Parameters.Add("@QuantityToTransfer", SqlDbType.SmallInt);  
                    reduceCommand.Parameters[2].Value = quantityToTransfer;  
  
                    reduceCommand.ExecuteNonQuery();  
  
                    //Increate inventory count at destination  
                    SqlCommand increaseCommand = adventureworksConnection.CreateCommand();  
                    increaseCommand.CommandText = "UPDATE Production.ProductInventory"  
                        + " SET Quantity = Quantity + @QuantityToTransfer"  
                        + " WHERE ProductID = @ProductID AND LocationID = @LocationID;";  
                    increaseCommand.Parameters.Add("@ProductID", SqlDbType.Int);  
                    increaseCommand.Parameters[0].Value = productID;  
                    increaseCommand.Parameters.Add("@LocationID", SqlDbType.SmallInt);  
                    increaseCommand.Parameters[1].Value = toLocationID;  
                    increaseCommand.Parameters.Add("@QuantityToTransfer", SqlDbType.SmallInt);  
                    increaseCommand.Parameters[2].Value = quantityToTransfer;  
  
                    increaseCommand.ExecuteNonQuery();  
  
                    // Create an audit trail of the inventory transfer.  We must impersonate the  
                    // client credentials in order for this to work.  Otherwise we'd have to  
                    // set up security for the machine account.  
//                    SqlConnection auditConnection = adventureworksConnection;  
                    using (SqlConnection auditConnection = new SqlConnection(auditConnectionString))  
                    {  
                        SqlCommand auditCommand = auditConnection.CreateCommand();  
                        auditCommand.CommandText = "INSERT InventoryChange "  
                            + " (ProductID, FromLocationID, ToLocationID, Quantity) "  
                            + " VALUES (@ProductID, @FromLocationID, @ToLocationID, @Quantity);";  
                        auditCommand.Parameters.Add("@ProductID", SqlDbType.Int);  
                        auditCommand.Parameters[0].Value = productID;  
                        auditCommand.Parameters.Add("@FromLocationID", SqlDbType.SmallInt);  
                        auditCommand.Parameters[1].Value = fromLocationID;  
                        auditCommand.Parameters.Add("@ToLocationID", SqlDbType.SmallInt);  
                        auditCommand.Parameters[2].Value = toLocationID;  
                        auditCommand.Parameters.Add("@Quantity", SqlDbType.SmallInt);  
                        auditCommand.Parameters[3].Value = quantityToTransfer;  
  
                        // Opening auditConnection automatically enlists it in the   
                        // TransactionScope as part of the transaction.  
                        auditConnection.Open();  
                        auditCommand.ExecuteNonQuery();  
                    }  
  
                }  
                //  The Complete method commits the transaction.  
                transScope.Complete();  
            }  
        }  
    }

Visual Basic

Imports System  
Imports System.Collections.Generic  
Imports System.Text  
Imports System.Data  
Imports System.Data.SqlTypes  
Imports System.Data.SqlClient  
Imports System.Transactions  
Imports Microsoft.SqlServer.Server  
Imports System.Security.Principal  
Imports System.Globalization  
  
Public NotInheritable Class InventoryMover  
    Private Const contextConnectionString As String = "context connection=true"  
  
    Private Sub New()  
  
    End Sub  
  
    ' **********  
    ' Important: Change this connection string to refer to a server other than the one  
    ' you have installed the AdventureWorks database.  This sample demonstrates   
    ' two-phase commit across multiple servers, and loopback to the same server is not  
    ' permitted from CLR integrated based stored procedures.  
    ' **********  
    Private Const auditConnectionString As String = "server=<YourServer>; database=InventoryAudit; user=<YourUser>; password=<YourPassword>"  
    <SqlMethod(DataAccess:=DataAccessKind.Read, IsMutator:=True)> _  
    Public Shared Sub ExecuteTransfer(ByVal productID As Integer, ByVal fromLocationID As Short, _  
        ByVal toLocationID As Short, ByVal quantityToTransfer As Short)  
        ' Establish bounds of the transaction  
        Using transScope As New TransactionScope()  
            Using adventureworksConnection As New SqlConnection(contextConnectionString)  
                ' Opening adventureworksConnection automatically enlists it in the   
                ' TransactionScope as part of the transaction.  
                adventureworksConnection.Open()  
  
                Dim checkCommand As SqlCommand = adventureworksConnection.CreateCommand()  
                checkCommand.CommandText = "SELECT TOP 1 Quantity" _  
                        & " FROM Production.ProductInventory WITH (REPEATABLEREAD)" _  
                        & " WHERE ProductID = @ProductID AND LocationID = @LocationID;"  
                checkCommand.Parameters.Add("@ProductID", SqlDbType.Int)  
                checkCommand.Parameters(0).Value = productID  
                checkCommand.Parameters.Add("@LocationID", SqlDbType.Int)  
                checkCommand.Parameters(1).Value = fromLocationID  
  
                Dim result As Object = checkCommand.ExecuteScalar()  
                Dim availableQuantity As Short = CType(result, Short)  
  
                If (availableQuantity < quantityToTransfer) Then  
                    'It would be better to throw a custom error, and in some cases to actually  
                    'RAISERROR.  Also, it would be better to map product IDs and location IDs to   
                    'names for the error message.  
                    Throw New ArgumentOutOfRangeException("quantityToTransfer", _  
                        String.Format(CultureInfo.InvariantCulture, "Attempt to transfer {0} of product {1} from" _  
                        & " location {2} but only {3} is available.", _  
                        quantityToTransfer, productID, fromLocationID, _  
                        availableQuantity))  
                End If  
  
                'Remove inventory count from source  
                Dim reduceCommand As SqlCommand = adventureworksConnection.CreateCommand()  
                reduceCommand.CommandText = "UPDATE Production.ProductInventory" _  
                    & " SET Quantity = Quantity - @QuantityToTransfer" _  
                    & " WHERE ProductID = @ProductID AND LocationID = @LocationID;"  
                reduceCommand.Parameters.Add("@ProductID", SqlDbType.Int)  
                reduceCommand.Parameters(0).Value = productID  
                reduceCommand.Parameters.Add("@LocationID", SqlDbType.SmallInt)  
                reduceCommand.Parameters(1).Value = fromLocationID  
                reduceCommand.Parameters.Add("@QuantityToTransfer", SqlDbType.SmallInt)  
                reduceCommand.Parameters(2).Value = quantityToTransfer  
  
                reduceCommand.ExecuteNonQuery()  
  
                'Increate inventory count at destination  
                Dim increaseCommand As SqlCommand = adventureworksConnection.CreateCommand()  
                increaseCommand.CommandText = "UPDATE Production.ProductInventory" _  
                    & " SET Quantity = Quantity + @QuantityToTransfer" _  
                    & " WHERE ProductID = @ProductID AND LocationID = @LocationID;"  
                increaseCommand.Parameters.Add("@ProductID", SqlDbType.Int)  
                increaseCommand.Parameters(0).Value = productID  
                increaseCommand.Parameters.Add("@LocationID", SqlDbType.SmallInt)  
                increaseCommand.Parameters(1).Value = toLocationID  
                increaseCommand.Parameters.Add("@QuantityToTransfer", SqlDbType.SmallInt)  
                increaseCommand.Parameters(2).Value = quantityToTransfer  
  
                increaseCommand.ExecuteNonQuery()  
  
                ' Create an audit trail of the inventory transfer.  We must impersonate the  
                ' client credentials in order for this to work.  Otherwise we'd have to  
                ' set up security for the machine account.  
                'SqlConnection auditConnection = adventureworksConnection  
                Using auditConnection As New SqlConnection(auditConnectionString)  
                    Dim auditCommand As SqlCommand = auditConnection.CreateCommand()  
                    auditCommand.CommandText = "INSERT InventoryChange " _  
                        & " (ProductID, FromLocationID, ToLocationID, Quantity) " _  
                        & " VALUES (@ProductID, @FromLocationID, @ToLocationID, @Quantity);"  
                    auditCommand.Parameters.Add("@ProductID", SqlDbType.Int)  
                    auditCommand.Parameters(0).Value = productID  
                    auditCommand.Parameters.Add("@FromLocationID", SqlDbType.SmallInt)  
                    auditCommand.Parameters(1).Value = fromLocationID  
                    auditCommand.Parameters.Add("@ToLocationID", SqlDbType.SmallInt)  
                    auditCommand.Parameters(2).Value = toLocationID  
                    auditCommand.Parameters.Add("@Quantity", SqlDbType.SmallInt)  
                    auditCommand.Parameters(3).Value = quantityToTransfer  
  
                    ' Opening auditConnection automatically enlists it in the   
                    ' TransactionScope as part of the transaction.  
                    auditConnection.Open()  
                    auditCommand.ExecuteNonQuery()  
  
                End Using  
            End Using  
  
            '  The Complete method commits the transaction.  
            transScope.Complete()  
        End Using  
    End Sub  
End Class

Este es el script de instalación de Transact-SQL (Install.sql), que implementa el ensamblado y crea el procedimiento almacenado en la base de datos.

USE AdventureWorks  
GO  
  
-- Drop existing sproc and assembly if any.  
  
IF EXISTS (SELECT * FROM sys.procedures WHERE [name] = 'usp_ExecuteTransfer')  
DROP PROCEDURE usp_ExecuteTransfer;  
GO  
  
IF EXISTS (SELECT * FROM sys.assemblies WHERE [name] = 'Transaction')  
DROP ASSEMBLY [Transaction];  
GO  
  
USE master  
GO  
  
IF EXISTS (SELECT * FROM sys.server_principals WHERE [name] = 'ExternalSample_Login')  
DROP LOGIN ExternalSample_Login;  
GO  
  
IF EXISTS (SELECT * FROM sys.asymmetric_keys WHERE [name] = 'ExternalSample_Key')  
DROP ASYMMETRIC KEY ExternalSample_Key;  
GO  
DECLARE @SamplesPath nvarchar(1024)  
-- You may need to modify the value of the this variable if you have installed the sample someplace other than the default location.  
set @SamplesPath = 'C:\MySample\'  
  
EXEC('CREATE ASYMMETRIC KEY ExternalSample_Key FROM EXECUTABLE FILE = ''' + @SamplesPath + 'Transaction.dll'';');  
CREATE LOGIN ExternalSample_Login FROM ASYMMETRIC KEY ExternalSample_Key  
GRANT EXTERNAL ACCESS ASSEMBLY TO ExternalSample_Login  
GO  
  
USE AdventureWorks  
GO  
  
DECLARE @SamplesPath nvarchar(1024)  
-- You may need to modify the value of this variable if you have installed the sample someplace other than the default location.  
set @SamplesPath = 'C:\MySample\'  
-- Add the assembly and CLR integration based stored procedure  
  
CREATE ASSEMBLY [Transaction]   
FROM @SamplesPath + 'Transaction.dll'  
WITH permission_set = External_Access;  
GO  
  
CREATE PROCEDURE usp_ExecuteTransfer  
(  
@ProductID int,  
@FromLocationID smallint,  
@ToLocationID smallint,  
@QuantityToTransfer smallint  
)  
AS EXTERNAL NAME [Transaction].[InventoryMover].ExecuteTransfer;  
GO

Este es el script de instalación de Transact-SQL (InstallDB.sql), que crea la base de datos de auditoría en la segunda instancia de SQL Server.

SET NOCOUNT OFF;  
GO  
  
PRINT CONVERT(varchar(1000), @@VERSION);  
GO  
  
PRINT '';  
PRINT 'Started - ' + CONVERT(varchar, GETDATE(), 121);  
GO  
  
USE [master];  
GO  
  
-- ****************************************  
-- Drop Database  
-- ****************************************  
PRINT '';  
PRINT '*** Dropping Database';  
GO  
  
IF EXISTS (SELECT [name] FROM [master].[sys].[databases] WHERE [name] = N'InventoryAudit')  
    DROP DATABASE [InventoryAudit];  
  
-- If the database has any other open connections close the network connection.  
IF @@ERROR = 3702   
    RAISERROR('[InventoryAudit] database cannot be dropped because there are still other open connections', 127, 127) WITH NOWAIT, LOG;  
GO  
  
-- ****************************************  
-- Create Database  
-- ****************************************  
PRINT '';  
PRINT '*** Creating Database';  
GO  
  
DECLARE   
    @sql_path nvarchar(256),   
    @sql_cmd nvarchar(256);  
  
SELECT @sql_path = SUBSTRING([physical_name], 1, CHARINDEX(N'master.mdf', LOWER([physical_name])) - 1)  
FROM [master].[sys].[master_files]   
WHERE [database_id] = 1   
    AND [file_id] = 1;  
  
-- COLLATE Latin1_General_CS_AS  
EXECUTE (N'CREATE DATABASE [InventoryAudit]   
    ON (NAME = ''InventoryAudit_Data'', FILENAME = N''' + @sql_path + N'InventoryAudit_Data.mdf'', SIZE = 120, FILEGROWTH = 8)   
    LOG ON (NAME = ''InventoryAudit_Log'', FILENAME = N''' + @sql_path + N'InventoryAudit_Log.ldf'' , SIZE = 2, FILEGROWTH = 96);');  
GO  
  
ALTER DATABASE [InventoryAudit]   
SET RECOVERY SIMPLE,   
    ANSI_NULLS ON,   
    ANSI_PADDING ON,   
    ANSI_WARNINGS ON,   
    ARITHABORT ON,   
    CONCAT_NULL_YIELDS_NULL ON,   
    QUOTED_IDENTIFIER ON,   
    NUMERIC_ROUNDABORT OFF,   
    PAGE_VERIFY CHECKSUM,   
    ALLOW_SNAPSHOT_ISOLATION OFF;  
GO  
  
USE [InventoryAudit];  
GO  
  
PRINT '';  
PRINT '*** Creating Table';  
GO  
  
CREATE TABLE [InventoryChange] (  
[InventoryChangeID] int IDENTITY (1, 1) NOT NULL,  
[ProductID] int NOT NULL,  
[FromLocationID] smallint,  
[ToLocationID] smallint,  
[Quantity] smallint NOT NULL  
);  
GO

Se trata de test.sql, que prueba el ejemplo mediante la ejecución de las funciones.

USE AdventureWorks  
GO  
SELECT 'Before first transfer quantity of adjustable races at Tool Crib = ', Quantity FROM Production.ProductInventory  
WHERE ProductID = 1 AND LocationID = 1  
  
SELECT 'Before first transfer quantity of adjustable races at Miscellaneous Storage = ', Quantity FROM Production.ProductInventory  
WHERE ProductID = 1 AND LocationID = 6  
  
--Move 12 adjustable race parts (product id 1) from the Tool Crib (location id 1)   
--to Miscellaneous Storage (location id 6).  
EXEC usp_ExecuteTransfer 1, 1, 6, 12  
  
SELECT 'After first transfer quantity of adjustable races at Tool Crib = ', Quantity FROM Production.ProductInventory  
WHERE ProductID = 1 AND LocationID = 1  
  
SELECT 'After first transfer quantity of adjustable races at Miscellaneous Storage = ', Quantity FROM Production.ProductInventory  
WHERE ProductID = 1 AND LocationID = 6  
  
--Move them back  
EXEC usp_ExecuteTransfer 1, 6, 1, 12  
  
SELECT 'After second transfer quantity of adjustable races at Tool Crib = ', Quantity FROM Production.ProductInventory  
WHERE ProductID = 1 AND LocationID = 1  
  
SELECT 'After second transfer quantity of adjustable races at Miscellaneous Storage = ', Quantity FROM Production.ProductInventory  
WHERE ProductID = 1 AND LocationID = 6  
  
The following tsql removes the assembly and stored procedure from the database (Cleanup.sql).  
USE AdventureWorks  
GO  
  
-- Drop existing sproc and assembly if any.  
  
IF EXISTS (SELECT * FROM sys.procedures WHERE [name] = 'usp_ExecuteTransfer')  
DROP PROCEDURE usp_ExecuteTransfer;  
GO  
  
IF EXISTS (SELECT * FROM sys.assemblies WHERE [name] = 'Transaction')  
DROP ASSEMBLY [Transaction];  
GO  
  
USE master  
GO  
  
IF EXISTS (SELECT * FROM sys.server_principals WHERE [name] = 'ExternalSample_Login')  
DROP LOGIN ExternalSample_Login;  
GO  
  
IF EXISTS (SELECT * FROM sys.asymmetric_keys WHERE [name] = 'ExternalSample_Key')  
DROP ASYMMETRIC KEY ExternalSample_Key;  
GO  
  
USE AdventureWorks  
GO

El siguiente Transact-SQL quita la base de datos de auditoría de la segunda instancia

SET NOCOUNT OFF;  
GO  
  
PRINT CONVERT(varchar(1000), @@VERSION);  
GO  
  
PRINT '';  
PRINT 'Started - ' + CONVERT(varchar, GETDATE(), 121);  
GO  
  
USE [master];  
GO  
  
-- ****************************************  
-- Drop Database  
-- ****************************************  
PRINT '';  
PRINT '*** Dropping Database';  
GO  
  
IF EXISTS (SELECT [name] FROM [master].[sys].[databases] WHERE [name] = N'InventoryAudit')  
    DROP DATABASE [InventoryAudit];  
  
-- If the database has any other open connections close the network connection.  
IF @@ERROR = 3702   
    RAISERROR('[InventoryAudit] database cannot be dropped because there are still other open connections', 127, 127) WITH NOWAIT, LOG;  
GO

El siguiente Transact-SQL quita el ensamblado y las funciones de la base de datos.

SE AdventureWorks  
GO  
  
-- Drop existing sproc and assembly if any.  
  
IF EXISTS (SELECT * FROM sys.procedures WHERE [name] = 'usp_ExecuteTransfer')  
DROP PROCEDURE usp_ExecuteTransfer;  
GO  
  
IF EXISTS (SELECT * FROM sys.assemblies WHERE [name] = 'Transaction')  
DROP ASSEMBLY [Transaction];  
GO  
  
USE master  
GO  
  
IF EXISTS (SELECT * FROM sys.server_principals WHERE [name] = 'ExternalSample_Login')  
DROP LOGIN ExternalSample_Login;  
GO  
  
IF EXISTS (SELECT * FROM sys.asymmetric_keys WHERE [name] = 'ExternalSample_Key')  
DROP ASYMMETRIC KEY ExternalSample_Key;  
GO  
  
USE AdventureWorks  
GO

Véase también

Escenarios de uso y ejemplos para la integración de Common Language Runtime (CLR)

  • Last updated on