Skip to main content

Run MDX queries from .NET

SQL Server Analysis services offers a powerful query language on top of your datawarehouse called MDX. But how do you use these MDX queries inside your .NET application?

You cannot use your normal ADO.NET classes, instead you have to use the Microsoft.AnalysisServices.AdomdClient.dll.

You can download the file from here: http://www.microsoft.com/downloads/details.aspx?FamilyId=228DE03F-3B5A-428A-923F-58A033D316E1&displaylang=en

The code itself is somewhat similar:

using (AdomdConnection conn = new AdomdConnection("Data Source=tfsDB;Initial Catalog=Tfs_Analysis; MDX Compatibility=1;"))
{
	conn.Open();
	var mdxQuery = new StringBuilder();
	mdxQuery.Append("WITH ");
	mdxQuery.Append("SET [Last 4 weeks] as Filter([Date].[Date].[Date], [Date].[Date].CurrentMember.Member_Value < Now() AND [Date].[Date].CurrentMember.Member_Value >= DateAdd(\"d\", - 28, Now())) ");
	mdxQuery.Append("SELECT NON EMPTY Hierarchize(AddCalculatedMembers({DrilldownLevel({[Work Item].[System_WorkItemType].[All]})})) DIMENSION PROPERTIES PARENT_UNIQUE_NAME,HIERARCHY_UNIQUE_NAME ON COLUMNS , NON EMPTY {Hierarchize(Distinct({[Last 4 weeks]}))} DIMENSION PROPERTIES PARENT_UNIQUE_NAME,HIERARCHY_UNIQUE_NAME ON ROWS ");
	mdxQuery.Append("FROM (SELECT ({[Work Item].[System_WorkItemType].&[Requirement], [Work Item].[System_WorkItemType].&[Change Request]}) ");
	mdxQuery.Append("ON COLUMNS  FROM [Team System]) WHERE ([Work Item].[Iteration Hierarchy].[All],[Test Case].[System_WorkItemType].[All],[Work Item].[System_State].&[Active],[Measures].[Work Item Count]) ");

	using (AdomdCommand cmd = new AdomdCommand(mdxQuery.ToString(), conn))
	{
		DataSet ds = new DataSet();
		ds.EnforceConstraints = false;
		ds.Tables.Add();
		DataTable dt = ds.Tables[0];
		dt.Load(cmd.ExecuteReader());
		return dt;
	}
}

Labels:

Popular posts from this blog

.NET 8–Keyed/Named Services

A feature that a lot of IoC container libraries support but that was missing in the default DI container provided by Microsoft is the support for Keyed or Named Services. This feature allows you to register the same type multiple times using different names, allowing you to resolve a specific instance based on the circumstances. Although there is some controversy if supporting this feature is a good idea or not, it certainly can be handy. To support this feature a new interface IKeyedServiceProvider got introduced in .NET 8 providing 2 new methods on our ServiceProvider instance: object? GetKeyedService(Type serviceType, object? serviceKey); object GetRequiredKeyedService(Type serviceType, object? serviceKey); To use it, we need to register our service using one of the new extension methods: Resolving the service can be done either through the FromKeyedServices attribute: or by injecting the IKeyedServiceProvider interface and calling the GetRequiredKeyedServic...
Read more

Azure DevOps/ GitHub emoji

I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.
Read more

Kubernetes–Limit your environmental impact

Reducing the carbon footprint and CO2 emission of our (cloud) workloads, is a responsibility of all of us. If you are running a Kubernetes cluster, have a look at Kube-Green . kube-green is a simple Kubernetes operator that automatically shuts down (some of) your pods when you don't need them. A single pod produces about 11 Kg CO2eq per year( here the calculation). Reason enough to give it a try! Installing kube-green in your cluster The easiest way to install the operator in your cluster is through kubectl. We first need to install a cert-manager: kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.14.5/cert-manager.yaml Remark: Wait a minute before you continue as it can take some time before the cert-manager is up & running inside your cluster. Now we can install the kube-green operator: kubectl apply -f https://github.com/kube-green/kube-green/releases/latest/download/kube-green.yaml Now in the namespace where we want t...
Read more