Given an {{@Entity}} with {{@GenerationType.AUTO}}:
{code}@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public Integer getId() {
return id;
}{code}
Hibernate 4.x generated the following SQL:
{code:sql}create table MyEntity (
id integer generated by default as identity (start with 1),
primary key (id)
) ; {code}
Now, with Hibernate 5.x, this behaviour changend to:
{code:sql}create sequence hibernate_sequence start with 1 increment by 1 ;
create table MyEntity (
id integer not null,
primary key (id)
) ; {code}
This breaks my testcases, since the sequence {{hibernate_sequence}} is also being used by all other entities, so I can't rely on certain entities having certain IDs.
One might argue that relying on IDs is a bad practice, admittedly.
But the point is that the default behaviour just changed.
I've checked the JPA Spec for further details about {{@GenerationType.AUTO}}, but I didn't find any. |
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