NHibernate many-to-one with lazy false ever executes N queries - nhibernate

Question

I want a list of Purchase searched with some criteria.
Purchase entity contains one Product.
This is the mappings:
<class name="Product" table="Products">
<id name="Id">
<generator class="identity"></generator>
</id>
<property name="Name"></property>
<many-to-one name="Brand" column="BrandId" lazy="false" fetch="join" />
<many-to-one name="Category" column="CategoryId" lazy="false" fetch="join" />
</class>
<class name="Shop" table="Shops">
<id name="Id">
<generator class="identity"></generator>
</id>
<property name="Name"></property>
</class>
<class name="Purchase" table="Purchases" lazy="false">
<id name="Id">
<generator class="identity"></generator>
</id>
<many-to-one name="Product" column="ProductId" lazy="false" fetch="join" />
<many-to-one name="Shop" column="ShopId" lazy="false" fetch="join" />
</class>
And this is the way as I perform the search:
string query = string.Format(#"
select pc from Purchase as pc
inner join pc.Product as p
left outer join p.Brand as b
where
{0} and {1}
and
(
(p.Name like '%{2}%')
or (b.Name like '%{2}%')
)
",
filters.From.HasValue ? "pc.Date >= " + SqlHelper.GetSqlDate(filters.From) : "1=1",
filters.To.HasValue ? "pc.Date <= " + SqlHelper.GetSqlDate(filters.To) : "1=1",
filters.Text);
var list = session.CreateQuery(query)
.List<Purchase>(); //.Future<Purchase>().ToList();
return list;
(I didn't remove other filters on query just to "show" that a simple Get/Query/QueryOver is not possible (it is not readable as a SQL or HQL)
It can be improved... but the problem here is that this code produce 1 query for purchase list and N queries for Product plus M queries for Shop, for example 251 or 770 queries was executed instead of one.
I aspect that just one query was executed, because of lazy="false" on the many-to-one relation.
Why NHibernate make a query on Product (and on Shop) for every Purchase?
Ho can I change the mapping to obtain the execution of one query?
Thanks,
Alessandro

Answer 1

HQL does not respect fetch="join" (in the mapping). I explicit it adding fetch in the join:
select pc from Purchase as pc
inner join **fetch** pc.Product as p
left outer join **fetch** p.Brand as b
... and it works: only one query is executed.