HQL query that uses implicit polymorphism returns (# concrete classes x n) rows, not n rows, when setMaxResults(n) is used -------------------------------------------------------------------------------------------------------------------------- Key: HHH-1952 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1952 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.1.3 Environment: Hibernate: 3.1.3 Reporter: David Donn If I have m mapped entities that implement the same interface and execute a polymorphic query with setMaxResults(n) I get n x m rows instead of n rows in my result. Query: session.createQuery("from Animal").setMaxResults(1) Hibernate mapping: <class name="Lion" table="lion" lazy="false"> <id name="id"> <generator class="sequence"> <param name="sequence">animal_seq</param> </generator> </id> </class> <class name="Tiger" table="tiger" lazy="false"> <id name="id"> <generator class="sequence"> <param name="sequence">animal_seq</param> </generator> </id> </class> Class definitions: public interface Animal { } public class Lion implements Animal { private Long id; public Long getId() { return id; } public void setId(Long id) { this.id = id; } } public class Tiger implements Animal { private Long id; public Long getId() { return id; } public void setId(Long id) { this.id = id; } } SQL: create sequence animal_seq start with 1 / create table lion (id number(12) primary key) / create table tiger (id number(12) primary key) / insert into lion values (animal_seq.nextval) / insert into tiger values (animal_seq.nextval) /