How to avoid Query Plan re-compilation when using IEnumerable.Contains in Entity Framework LINQ queries?

Question

I have the following LINQ query executed using Entity Framework (v6.1.1):

private IList GetFullCustomers(IEnumerable customersIds)         


        

Answer 1

This is really a huge problem, and there's no one-size-fits-all answer. However, when most lists are relatively small, diverga's "Second Workaround" works well. I've built a library distributed as a NuGet package to perform this transformation with as little modification to the query as possible:

https://github.com/bchurchill/EFCacheContains

It's been tested out in one project, but feedback and user experiences would be appreciated! If any issues come up please report on github so that I can follow-up.