hibernate/hibernate-orm · error · UnsupportedOperationException

Join fetching an @Any association is not supported for entit

Error message

Join fetching an @Any association is not supported for entity '%s' because it does not use a basic identifier

What it means

Error "Join fetching an @Any association is not supported for entity '%s' because it does not use a basic identifier" thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/DiscriminatedAssociationMapping.java:523

			auxiliaryMapping.applyPredicate(
					entityMappingType,
					predicateCollector::applyPredicate,
					entityTableGroup,
					creationState.getSqlAliasBaseGenerator(),
					creationState.getLoadQueryInfluencers()
			);
		}
	}

	private Predicate createAssociationPredicate(
			TableGroup lhs,
			TableGroup entityTableGroup,
			EntityMappingType entityMappingType,
			DiscriminatorValueDetails valueDetail) {
		final var identifierMapping = entityMappingType.getIdentifierMapping();
		final BasicValuedModelPart identifierPart = identifierMapping.asBasicValuedModelPart();
		if ( identifierPart == null ) {
			throw new UnsupportedOperationException(
					"Join fetching an @Any association is not supported for entity '" + entityMappingType.getEntityName()
							+ "' because it does not use a basic identifier"
			);
		}

		final TableReference discriminatorTableReference =
				lhs.resolveTableReference( null, discriminatorPart.getContainingTableExpression() );
		final TableReference keyTableReference =
				lhs.resolveTableReference( null, keyPart.getContainingTableExpression() );
		final TableReference identifierTableReference =
				entityTableGroup.resolveTableReference( entityTableGroup.getNavigablePath(), identifierPart.getContainingTableExpression() );

		final Junction predicate = new Junction( Junction.Nature.CONJUNCTION );
		predicate.add(
				new ComparisonPredicate(
						new ColumnReference( discriminatorTableReference, discriminatorPart ),
						EQUAL,
						new QueryLiteral<>( valueDetail.getValue(), discriminatorPart )

View on GitHub (pinned to fad1729dce)

Solutions

1. Remove the join fetch on the @Any association; load it lazily or with a select fetch.
2. Use an entity with a basic (single-column) identifier for join-fetched any-associations.

When it happens

Trigger: Thrown when a join fetch is requested on an @Any association whose target entity uses a non-basic (composite) identifier.

Common situations: See trigger scenarios.

AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22). Data as JSON: /api/errors/245aa477692cad4f. Report an issue: GitHub.