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Silent Arithmetic Overflow

Posted By:      Posted Date: September 10, 2010    Points: 0   Category :Sql Server
 
I recently discovered that SSAS silently handles arithmetic overflow and returns garbage. For example when calculating aggregations for a 4-byte integer measure, when the sum exceeds the maximum storage it returns the overflow garbage instead of raising an error. I can work round the problem by changing the measure storage to 8-bytes, but that doubles my storage and the number of bytes I have to read for the aggregate. Is there a way round this problem that doesn't effect performance?


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sir

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