Group by bug: records are grouped on client

[sdanyliv]

The following unit test passes correctly but result of group by statement is calculated on client:

//Northwind

        [Test]
        [Category("Grouping")]
        public void GroupByCalculatedTest()
        {
            var result =
                from o in db.Orders
                group o by o.Freight > 50 ? o.Freight > 100 ? "expensive" : "average" : "cheap"
                into g
                select g;
            var list = result.ToList();
            Assert.AreEqual(3, list.Count);
        }

Gnerated SQL (formatted):

SELECT [o].[OrderID], [o].[CustomerID], [o].[EmployeeID], [o].[Freight], [o].[OrderDate], 
  [o].[RequiredDate], [o].[ShipAddress], [o].[ShipCity], [o].[ShipCountry], [o].[ShipName], 
  [o].[ShipPostalCode], [o].[ShipRegion], [o].[ShipVia], [o].[ShippedDate]
FROM [Orders] AS [o]

In pessimistic case It may take all server's memory.

"EntityFramework.Core" version="7.0.0-rc1-final"
"Remotion.Linq" version="2.0.2"

[rowanmiller]

Duplicate of #2341