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When the number of allowable errors is increased to a number greater than zero, the cube will continue processing until the number of errors reported meets the new threshold level.

Five of the properties control whether an error is reported and processing continues, or an error is reported and processing stops, or whether the error ignored and not reported.įurthermore, NullProcessing of values is handled first during processing, as this defines how the NullKe圜onvertedToUnknown and NullKeyNotAllowed errors are handled. Out of the box, SSAS has default settings for handling errors these settings, which exist under the ErrorConfiguration property, allow for various outcomes to occur while processing a cube, partition, or dimension. As illustrated below, I updated the value to 88888. I then updated the PromotionKey in the fact table to a value that I knew was not a valid primary key value in the Promotion Dimension source table. To be able to show you the various examples, I did need to remove the constraint on the PromotionKey field in the fact table. Let us look at a few examples I am going to make changes to the PromotionKey field in the FactInternetSales fact table and the related primary key, PromotionKey in the DimPromotion table. So what does all this mean it means that you need to make sure you understand and use the proper setting when you process your cubes, partitions, and dimensions.

SQL Server Analysis Services Error Processing Example The difficult thing with setting the error configurations is that they can be set in one or more of all the following places:įurthermore, NULL processing methods always occur first before the error configurations are implemented and in some cases the Unknown Member settings in a dimension must be set in a specific way to interact with the error configuration properties. The option grid below shows the actions available for the CalculationError, KeyNotFound, KeyDuplicate, NullKeyNotAllowed, and NullKe圜onvertedToUnknow:

NullKeyNotAllowed - Determines what occurs when null values are not allowed.

NullKe圜onvertedToUnknown - Determines what occurs when null values are converted to unknown members.

KeyNotFound - Determines what occurs when a foreign key in the fact table does not have a matching primary key value in the related dimension table.

KeyErrorLogFile - Notes the location of the SSAS processing error log file, the SSAS service account must have access to the directory.

KeyErrorLimit - Determines how many errors can be recorded before processing stops, -1 allows for unlimited errors.

The two options are ConvertToUnknown and DiscardRecord.

KeyErrorAction - Determines what action is implemented when a KeyNotFound error occurs.

KeyDuplicate - Determines what occurs when duplicate keys are found in a dimension.

CalculationError - Determines what occurs when an error is found in a calculation created on the Calculation tab.

In actuality, 9 properties make up the error configuration setting and each property has its own default value as shown in the second illustration below.Įach of the 9 properties controls slightly different processing results and several of the settings have the same potential values that can be selected. Setting the SSAS ErrorConfiguration PropertiesĪs shown in the next illustration the default error configuration for an SSAS cube is not surprisingly "default". To the contrary, the error processing options provide a great way for cube processing to continue when only minor or immaterial errors occur during cube processing which in turn provides for great "up and running" time for the cubes themselves. Many of the options often would violate foreign key constraint issues that normally would surface in a normalized OLTP database.

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As with many features, you need to be careful to use these options appropriately and with full knowledge of the impact on your data.

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These properties allow you to set various error number thresholds for stopping processing while at the same time telling SSAS how to handle specific errors that occur. SQL Server Analysis Services (SSAS) actually offers an array of various error handling techniques for common issues that surface when processing a cube, a partition, or a dimension.

What are the different methods of dealing with errors in SQL Server Analysis Services (SSAS) processing and should change the default options? What are the SSAS error processing options for a cube, a partition, or a dimension? How can you change the SSAS error processing configuration? Solution