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«September 2015»
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Executing DBCC for SQL Server Analysis Services 2016

In the upcoming release of SQL Server Analysis Services 2016, one of the new features you’ll see is the ability to perform a database consistency check against your SSAS cubes and Tabular models. Just like in the database engine side of things, DBCC for SSAS checks for corruption across the entire database or individual objects within the database.

The DBCC command is shaped likes the XMLA Process command so there’s not a lot of complexity to it. Below here, you can see the basic syntax for the SSAS DBCC command. Its worthing noting that the syntax of the command will look the same whether you’re running it against an SSAS multidimensional database or Tabular model.

"http://schemas.microsoft.com/analysisservices/2003/engine">
    <Object>
        
        
        
        
    Object>

To run the DBCC command, just open a new MDX query window and use the code seen above. Enter in the IDs of your Database, cube, measure and/or partition.

When you’re running the DBCC command against a Tabular model, there are a couple things I’d like to point out.

In the element for the CubeID, you’ll need to specify the ID of the Model. And in the element for the MeasureGroupID, specify the ID for the table you want to check.

DBCC XMLA command for SSAS

If you want to check the whole database or model for consistency, simply remove the elements the lower elements. For example, if I wanted to check the whole model, I just would leave out the elements for MeasureGroupID and PartitionID.

To find the MeasureGroupID (Table ID) or PartitionID in a Tabular model, just navigate to the Properties for that object.

Find the SSAS Tabular MeasureGroup ID or Table ID

To find the Partition ID in a Tabular model, right click the table and select Partitions. Then highlight the partition you want to check and click the Settings icon.

Find the SSAS Tabular partition ID

If you run SQL Server Profiler against SSAS while executing the DBCC command, you can see the individual checking of the columns, tables, database and more.

SSAS Tabular Profiler trace DBCC

I also ran a trace against my SSAS 2016 OLAP instance to watch each segment of

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SSRS Data Driven Subscriptions Cryptic Job Names

When you create and schedule a Data Driven Subscription for a SQL Server Reporting Services (SSRS) report a job is created with a very meaningless name.  The name is actually a uniqueidentifier and is stored as such in the dbo.Schedule table in the ReportServer database.  I was recently asked if it was possible to use the Job Name to identify the Report associated with the job.  After a little digging I was able to produce the following query, which associates the Job Name with the Report Name:

SELECT

            s.ScheduleID Job_Name,

            su.Description Subscription_Description,

            c.Name Report_Name

FROM dbo.Schedule s

INNER JOIN dbo.ReportSchedule rs

            ON s.ScheduleID = rs.ScheduleID

INNER JOIN dbo.Catalog c

            ON rs.ReportID = c.ItemID

INNER JOIN dbo.Subscriptions su

            ON rs.SubscriptionID = su.SubscriptionID

The ReportServer database is a wealth of knowledge.  If you support Report Server deployments I recommend that you spend some time becoming familiar with the database schema.  If you have any questions or concerns regarading this topic please feel free to email me at pleblanc@pragmaticworks.com.

Talk to you soon,

Patrick LeBlanc, founder SQLLunch.com and TSQLScripts.com

Visit www.BIDN.com, Bringing Business Intelligence to your company

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