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Hibernate 7: a collection criterion next to an association block of the same collection throws ClassCastException

Aperta
  • Qualcosa non va?
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Valutazione

Difficoltà
4/5
Tempo stimato
3-5 giorni
Idoneità per principianti
35/100
Tipo di issue
Bug
Chiarezza
Specificata chiaramente
Stato di attività
Attiva
Stack tecnologico
groovy, java
Ambito
backend, databases

Direzione di ricerca

The failure is a ClassCastException where pets resolves to an SqmSetJoin instead of an SqmPluralValuedSimplePath, so start from how the Hibernate 7 criteria path resolves a property name that a join block has already created. Reproduce with the TCK Person and Pet domains, using the four cases in the issue (block first and criterion first, at top level and inside owner { }). Done means all four cases return the same results as Hibernate 6 and the regression tests pass.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

Expected Behavior

A collection criterion such as isNotEmpty('pets') restricts the collection whether it comes before or after a pets { ... } block in the same criteria, at the top level or inside another association block.

Actual Behaviour

On Hibernate 7, unless the criterion comes before the block inside another association block, the query fails with:

java.lang.ClassCastException: class org.hibernate.query.sqm.tree.domain.SqmSetJoin cannot be cast to class org.hibernate.query.sqm.tree.domain.SqmPluralValuedSimplePath

The path pets resolves to the join the block made for the association instead of to the collection-valued path that isNotEmpty expects. At the top level this happens in either order, because the join type a block of the queried class records becomes an alias definition of the query.

Steps To Reproduce

With the TCK Person (hasMany = [pets: Pet]) and Pet (owner) domains on Hibernate 7:

// top level, block first: ClassCastException
Person.createCriteria().list {
    pets { eq('name', 'Rex') }
    isNotEmpty('pets')
}

// top level, criterion first: ClassCastException
Person.createCriteria().list {
    isNotEmpty('pets')
    pets { eq('name', 'Rex') }
}

// inside another block, block first: ClassCastException
Pet.createCriteria().list {
    owner {
        pets { eq('name', 'Rex') }
        isNotEmpty('pets')
    }
}

// inside another block, criterion first: works
Pet.createCriteria().list {
    owner {
        isNotEmpty('pets')
        pets { eq('name', 'Rex') }
    }
}

Found while reviewing https://github.com/apache/grails-core/pull/16559#discussion_r4256550230; the behaviour is the same with and without that PR.

Environment Information
  • Hibernate 7 (grails-data-hibernate7), Hibernate ORM 7.4.10
  • JDK 21
Example Application

No response

Version

8.0.x

Lingua principale
Groovy
Stelle
2.9k
Fork
976
Merge medio
20h 13m
PR unite (30g)
168

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