[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-4256) Hibernate does not honor @Column(name=...) annotation with IdClass

Hibernate does not honor @Column(name=...) annotation with IdClass ------------------------------------------------------------------ Key: HHH-4256 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4256 Project: Hibernate Core Issue Type: Bug Components: annotations Environment: Hibernate 3.2.1, JBoss 4.0.4 Reporter: Steve Devore When an Entity uses an IdClass, any query will fail fails because it is using the name of the attribute instead of the one indicated by the @Column annotation. It fails because it is looking for the annotations of the IdClass instead of the main class. Please see the following example: The IdClass is defined as follows: public class DomainAdminId implements Serializable { private String domainName; private String adminUser; public DomainAdminId() { } public DomainAdminId(String domainName, String adminUser) { this.domainName = domainName; this.adminUser = adminUser; } public String getDomainName() { return domainName; } public void setDomainName(String domainName) { this.domainName = domainName; } public String getAdminUser() { return adminUser; } public void setAdminUser(String adminUser) { this.adminUser = adminUser; } public boolean equals(Object o) { return ((o instanceof DomainAdminId) && domainName.equals(((DomainAdminId)o).getDomainName()) && adminUser.equals(((DomainAdminId)o).getAdminUser())); } public int hashCode() { return (domainName+adminUser).hashCode(); } } And the following Entity using that idClass: @Entity @Table(name="domainadmin") @IdClass(DomainAdminId.class) @NamedQueries( { @NamedQuery(name = "DomainAdmin.test", query = "SELECT d FROM DomainAdmin d") ) public class DomainAdmin implements Serializable { @Id @Column(name="domain_name") private String domainName; @Id @Column(name="adminuser") private String adminUser; public DomainAdmin() { } public String getDomainName() { return domainName; } public void setDomainName(String domainName) { this.domainName = domainName; } public String getAdminUser() { return adminUser; } public void setAdminUser(String adminUser) { this.adminUser = adminUser; } } When executing the DomainAdmin.test Named Query I got this error: could not execute query [select domainadmi0_.adminUser as adminUser1_, domainadmi0_.domainName as domainName1_ from domainadmin domainadmi0_] com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: Unknown column 'domainadmi0_.domainName' in 'field list' In effect, as indicated in the source, the column name is "domain_name" and not "domainName". The same apply for the other column: adminUser (that should instead be "adminuser"), Workaround: If the @Column annotation is put on the IdClass it will work sucessfully. However, this should not be necessary.