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    <blockquote> <p>So, I could write my code in Linq to Objects, using lambda expressions, unit test this code on sample collections (having expressions compiled to .net), and reuse the same code as Linq to SQL in the DB stored procedure, so that inside SQL Server it would generate proper SQL for me (as Linq to SQL already does)...</p> </blockquote> <p>This plan was fine until you suggested the CLR code be called from your stored procs. Running CLR code from the database process itself creates a lot of problems with regards to versioning, configuration and database stability... Too many problems if you do that.</p> <p>Your motivation was to have the benefit of using stored procs, which are faster in general. If those stored procs are in turn running CLR code, they're not going to be faster than the CLR code running in the local process.</p> <p>Using the LINQ generated expressions technically consumes more CPU cycles than stored procs. This is because the database engine has to regenerate the execution plan each time a query is ran. Typically your database server is on a separate machine though that is not CPU bound (it will be limited instead by disk or network capacity), so this is not a real performance issue. It could be if you run the database server on the same machine as everything else, but don't try to fix this with something so convoluted until its a real issue.</p> <p>Udi's suggestion may be appropriate, if you want to decrease the overhead of generating the reports. There are two important side effects though to consider first. First, can afford to increase the performance overhead of the operations that pregenerate the reported fields? A bigger problem is that it couples your reporting logic with the code that runs the target system. This prevents you from being able to update the reporting code without also updating the business code, and presumes the reporting code being running as soon as the reported code is put into production.</p>
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    1. POWrite stored procedures in Linq/Lambda (Unit-testable but performant stored procs). Possible?
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    1. USFrank Schwieterman
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