I’m facing the following situation. My objectmodel is as follows: EntityA –*> EntityB ->

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Asked: May 30, 20262026-05-30T17:46:44+00:00 2026-05-30T17:46:44+00:00

I’m facing the following situation. My objectmodel is as follows: EntityA –*> EntityB ->

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I’m facing the following situation.

My objectmodel is as follows:

EntityA --*> EntityB -> EntityC

EntityA references a list of EntityB. EntityB references a single EntityC

My mapping is:

  <class name="EntityA" table="TAB_A" >
    <id name="Id" column="A_ID" >
      <generator class="native" />
    </id>
    <version name="Version" column="VERSION" />
    <bag name="listOfB" cascade="save-update" table="A_TO_C" lazy="false" >
      <key column="FK_A_ID" />

      <composite-element class="EntityB" >
        <many-to-one name="refToC" class="EntityC" column="FK_C_ID" cascade="save-update" />
      </composite-element>
    </bag>
  </class>

I left out all the extra properties and stuff.

I query the DB:

var query = session.Query<EntityA>()
                    .Where(a=> a.listOfB.Any(b => b.refToC == anInstanceOfC));

// count all matches
var count = query.ToFutureValue(t => t.Count());

Okay, that looks good for me so far ;). When I execute the query I get an error, that an SQL-Statement fails. The generated SQL contains the following sub statement:

select listOfB1_.A_ID
from A_TO_C listOfB1_
where a0_.A_ID=listOfB1_.FK_A_ID
and listOfB1_.FK_C_ID=?

The statement expects a column A_ID on table A_TO_C (which actually is the column name of the id-column of TAB_A). What it should do, is selecting the column listOfBl_.FK_A_ID wich is the foreign-key-column referencing the A_ID column of TAB_A.

Now the question: Am I wrong or is it the SQL-generator ?