Why does RavenDB return a wrong total result count? - ravendb

Question

As shown in the following unit test I expect stats.TotalResults to be 2 but is 3. Why is that?
[Test]
public void RavenQueryStatisticsTotalResultsTest1()
{
using (var db = _documentStore.OpenSession())
{
db.Store(new Club { Name = "Foo1", Type = "Amateur" }); // --> Matches all conditions
db.Store(new Club { Name = "Foo2", Type = "Professional" });
db.Store(new Club { Name = "Foo3", Type = "Amateur" }); // --> Matches all conditions
db.Store(new Club { Name = "Boo1", Type = "Amateur" });
db.Store(new Club { Name = "Boo2", Type = "Professional" });
db.SaveChanges();
}
WaitForIndexing(_documentStore);
using (var db = _documentStore.OpenSession())
{
RavenQueryStatistics stats;
var query = db.Query<Club>()
.Statistics(out stats)
.Where(club => club.Type == "Amateur")
.Intersect()
.Search(club => club.Name, "Foo*", escapeQueryOptions: EscapeQueryOptions.AllowPostfixWildcard);
var clubs = query.ToList();
Assert.AreEqual(2, clubs.Count);
Assert.AreEqual(2, stats.TotalResults); // I expect 2 but was 3! Why is that?
}
}

Answer 1

You need Intersect when using multiple where clauses. To combine Where and Search, you have to pass SearchOptions.And to Search:
using (var db = _documentStore.OpenSession()) {
RavenQueryStatistics stats;
var query = db.Query<Club>()
.Customize(_ => _.WaitForNonStaleResultsAsOfLastWrite())
.Statistics(out stats)
.Where(club => club.Type == "Amateur")
.Search(
club => club.Name,
"Foo*",
escapeQueryOptions: EscapeQueryOptions.AllowPostfixWildcard,
options:SearchOptions.And);
var clubs = query.ToList();
Assert.AreEqual(2, clubs.Count);
Assert.AreEqual(2, stats.TotalResults);
}