Generally, we create a primary column with some autogenerated value. Hibernate allows us to create the same using code. Let's take a look at some methods to create a column with an autogenerated value.
We can create an autogenerated column in many ways, such as:
Using a default generation strategy
Using a sequence generator
Using a table generator
@Id @GeneratedValue private long id;
Using the preceding code, hibernate will create a column with an autoincremental value.
By default, hibernate uses the
GenerationType.AUTO strategy if no strategy is supplied; so,
@GeneratedValue is equal to
Still, as it is database–specific, it's the responsibility of the database to provide a value for this column, and the same rule is applied for