How can ADOMD.NET be used to deploy UDFs (User defined functions) to SSAS?

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ADOMD.NET (Analysis Management Objects .NET) can be used to deploy UDFs (User Defined Functions) to SSAS (SQL Server Analysis Services) through the following steps:

1. Open Visual Studio and create a new console application.

2. Add a reference to the Microsoft.AnalysisServices.dll file, which is typically located in the \Program Files\Microsoft SQL Server\130\SDK\Assemblies directory.

3. Import the Microsoft.AnalysisServices namespace into your code.

4. Use the Server class to connect to the SSAS instance that contains the database where you want to deploy your UDFs.

   # Server server = new Server(); server.Connect("Data Source=ssas-instance-name"); Database db = server.Databases["database-name"];

5. Define the UDF in a string variable using the CREATE FUNCTION statement, as you would normally do in SQL Server Management Studio.

   # string udfScript = @"CREATE FUNCTION [dbo].[GetSalesAmount] (@ProductName nvarchar(50)) RETURNS float AS BEGIN DECLARE @SalesAmount float; SELECT @SalesAmount = SUM(SalesAmount) FROM FactSales WHERE ProductName = @ProductName RETURN @SalesAmount; END";

6. Create a new Assembly object and add the UDF script to its Source property.

   # Assembly udfAssembly = new Assembly(); udfAssembly.Name = "UDFAssembly"; udfAssembly.Source = udfScript;

7. Add the assembly to the database using the AssemblyCollection.Add method.

   # db.Assemblies.Add(udfAssembly); db.Update();

8. Verify that the UDF has been successfully deployed by querying the SystemCatalogs schema.

   # DataTable udfs = db.SchemaObjects.GetSchema(System.Data.DataTableType.Functions); foreach (DataRow row in udfs.Rows) { Console.WriteLine(row["FUNCTION_NAME"]); }

Note: You need to have appropriate permissions to deploy UDFs to SSAS, such as the Analysis Services role of Administrator or the right to modify database-level objects.