Comparing OneToOne mappedBy column to null generates wrong SQL -------------------------------------------------------------- Key: HHH-4795 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4795 Project: Hibernate Core Issue Type: Bug Environment: Hibernate core 3.3.2.GA Postgresql 8.4 Reporter: Uros Majeric I have two entities: @Entity @Table(name = "beer_keg") public class Keg implements Serializable { @Id @GeneratedValue @Column(name = "bkid") public Long getId() { return id; } public void setId(Long id) { this.id = id; } @OneToOne(mappedBy="keg", fetch=FetchType.LAZY, optional=true) public KegValveCombination getCombination() { return combination; } void setCombination(KegValveCombination combination) { this.combination = combination; } } and @Entity @Table(name="keg_valve_combination") public class KegValveCombination implements Serializable { @Id @GeneratedValue @Column(name="id", nullable=false) public Long getId() { return id; } public void setId(Long id) { this.id = id; } @OneToOne(cascade=CascadeType.ALL) @JoinColumn(name="keg", nullable=false, unique=true) public Keg getKeg() { return keg; } public void setKeg(Keg keg) { this.keg = keg; } } if I create query: em.createQuery("FROM Keg k WHERE k.combination is null").getResultList(); hibernate generates sql like: select keg0_.* from beer_keg keg0_ where keg0_.bkid is null but it should be: select keg0_.* from beer_keg keg0_ left join keg_valve_combination kegvalveco1_ on keg0_.bkid=kegvalveco1_.keg where (kegvalveco1_.keg is null) thanks, Uros -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira