MaxClauseCount.cs

using Raven.Client.Documents;
using Raven.Client.Documents.Linq;
using Raven.Client.Documents.Operations;
using Raven.Client.Documents.Queries;
using System;
using System.Linq;
using System.Threading.Tasks;

namespace ConsoleApp2
{
	class Program
    {
		public class Person
		{
			public string Id { get; set; }
			public string Filter { get; set; }
		}

		static void Main()
		{
			MainAsync().Wait();
		}
		
        static async Task MainAsync()
		{
			const int ceiling = 2_000;

			using(var store = new DocumentStore
			{
				Urls  = new[] { "http://live-test.ravendb.net" },
				Database = "test"
			})
			{
				store.Initialize();
				
				// Delete all documents
				var operation = await store.Operations.SendAsync(new DeleteByQueryOperation(
					new IndexQuery { Query = "from @all_docs as d" },
					new QueryOperationOptions
					{
						RetrieveDetails = true
					}
				));

				await operation.WaitForCompletionAsync<BulkOperationResult>();
				using (var s = store.OpenSession())
				{
					for (var i = 1; i < ceiling; i++)
						s.Store(new Person { Filter = i.ToString() });
					s.SaveChanges();
				}

				var list = Enumerable.Range(1, ceiling).Select(x => x.ToString()).ToList();

				Console.WriteLine("Start query...");
				using (var s = store.OpenSession())
				{
					var q = from doc in s.Query<Person>()
							where doc.Filter.In(list)
							select doc;

					var records = q.ToArray();
				}
				Console.ReadKey();
			}
        }
    }
}