[OPENJPA-1986] Extra queries being generated when cascading a persist

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.1, 2.1.0, 2.2.0
• Fix Version/s: 2.1.1, 2.2.0
• Component/s: performance
• Assignee: Richard G. Curtis
• Reporter: Richard G. Curtis
• Created: 27/Apr/11 16:44
• Updated: 24/Mar/14 16:43
• Resolved: 27/Apr/11 19:22

Description

I found a scenario where extra queries were being generated while cascading a persist to a new Entity. See the following example:

@Entity
public class CascadePersistEntity implements Serializable {
private static final long serialVersionUID = -8290604110046006897L;

@Id
long id;

@OneToOne(cascade = CascadeType.ALL)
CascadePersistEntity other;
...
}

and the following scenario:
CascadePersistEntity cpe1 = new CascadePersistEntity(1);
CascadePersistEntity cpe2 = new CascadePersistEntity(2);
cpe1.setOther(cpe2);
em.persist(cpe1);

This results in two inserts and one select. The extra select is what I'm going to get rid of with this JIRA.