Question

I have LINQ query that returns me the following error:
“The incoming tabular data stream (TDS) remote procedure call (RPC) protocol stream is incorrect. Too many parameters were provided in this RPC request. The maximum is 2100”.

All I need is to count all clients that have BirthDate that I have their ID’s in list.
My list of client ID’s could be huge (millions of records).

Here is the query:

List<int> allClients = GetClientIDs();

int total = context.Clients.Where(x => allClients.Contains(x.ClientID) && x.BirthDate != null).Count();

When the query is rewritten this way,

int total = context
    .Clients
    .Count(x => allClients.Contains(x.ClientID) && x.BirthDate != null);

it causes the same error.

Also tried to make it in different way and it eats all memory:

List<int> allClients = GetClientIDs();

total = (from x in allClients.AsQueryable()
         join y in context.Clients
         on x equals y.ClientID
         where y.BirthDate != null
         select x).Count();

Answer 1

Well as Gert Arnold mentioned before, making query in chunks solves the problem, but it looks nasty:

List<int> allClients = GetClientIDs();

int total = 0;

const int sqlLimit = 2000;

int iterations = allClients.Count() / sqlLimit;

for (int i = 0; i <= iterations; i++)
{
    List<int> tempList = allClients.Skip(i * sqlLimit).Take(sqlLimit).ToList();

    int thisTotal = context.Clients.Count(x => tempList.Contains(x.ClientID) && x.BirthDate != null);

    total = total + thisTotal;
}