Blaze persistence - Attribute 't' not found on type 'X' - jpa

Question

I am trying to make a recursive query using blaze persistence lib.
I have two tables (a and a_temp) and entities (A and ATemp respectively) that represent them. ATemp is almost like an entity view to the A class, but its table serves to temporary persist A object in data base (it's done by someone else and I don't intend on changing this). So, A and ATemp share some common columns. I also have an ACte.class, which is CTE of A.class.
I'm trying to join them by some of their properties, but get the following error:
Attribute 't' not found on type 'A'; nested exception is java.lang.IllegalArgumentException: Attribute 't' not found on type 'A'
the Criteria Builder looks like this
CriteriaBuilder<A> cb = cbf.create(em, A.class)
.from(A.class, "s")
.innerJoinOn(ATemp.class, "t")
.onExpression("s.prop1.id = t.prop1.id"
+ " AND s.prop2 = t.prop2")
.end()
// ...some more joins...
.whereExpression("...")
.where("s.id").notIn()
.from(ACte.class, "r")
.withRecursive(ACte.class)
.from(A.class, "m")
// bindings
.whereExpression("m.id = t.somepropId")
.unionAll()
.from(ACte.class, "r")
// bindings
.innerJoin(A.class, "d")
.onExpression("d.id = r.somepropId")
.end()
.end()
.select("r.id")
.end()
.select("s");
then I simply do cb.getResultList() and after I call for the method I get the error above.
What could possibly be wrong with it? I don't really get why it counts 't' as A class field and not an alias for ATemp
Thanks for any advice!
Upd.: for better clarity I decided to post a structure of the A and ATemp entities
#Entity
#Table(name = "a")
#NoArgsConstructor
#EqualsAndHashCode(callSuper = true)
public class A extends SomeParentClassThatHasId {
#Column(name = "prop1")
#Getter
#Setter
private SomeInnerClass prop1;
#Column(name = "prop2")
#Getter
#Setter
private String prop2;
...
}
#Entity
#Table(name = "a_temp")
#NoArgsConstructor
#EqualsAndHashCode(callSuper = true)
public class ATemp extends SomeParentClassThatHasId {
#Column(name = "prop1")
#Getter
#Setter
private SomeInnerClass prop1;
#Column(name = "prop2")
#Getter
#Setter
private String prop2;
...
}
#CTE
#Entity
#Data
#NoArgsConstructor
#EqualsAndHashCode(callSuper = true)
public class ACte extends SomeParentClassThatHasId {
private Long somepropId;
...
}

Answer 1

It's hard to say for sure what is happening (I might need to see a reproducer for this), but it seems to me that the use of .whereExpression("m.id = t.somepropId") might be the cause for this.
You are trying to add a recursive CTE from within a subquery, but it is not possible to refer to aliases in such CTEs. CTEs are fully isolated.
I don't know what your use case is, but if you need some help with that, join the community on Slack where we can dive deeper into this.
I think though, that you should try to write your CTE first, and then try to join against that.