Why would SET ARITHABORT ON dramatically speed up a query?

Posted by Jonathan Allen on Stack Overflow See other posts from Stack Overflow or by Jonathan Allen
Published on 2010-03-17T21:02:10Z Indexed on 2010/03/17 21:11 UTC
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The query is a single select containing a lot of grouping levels and aggragate operations. With SET ARITHABORT ON is takes less than a second, otherwise it takes several minutes. We have seen this behavior on SQL Server 2000 and 2008.

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