OneToOne association cannot be fetched with a single query in Hibernate

Solution In Progress - Updated -

Issue

  • A OneToOne association is defined between two entities (e.g. Customer and Address)
  • An HQL/JPAQL query like select c from Customer c join fetch c.address results in two distinct SQL queries

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP) 7
  • Hibernate 5

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