Package org.hibernate.annotations

Annotation Type Generated

@Target({FIELD,METHOD})
@Retention(RUNTIME)
public @interface Generated

Specifies that the value of the annotated property is generated by the database. The generated value will be automatically retrieved using a SQL SELECT after it is generated.

Generated relieves the program of the need to call Session.refresh(Object) explicitly to synchronize state held in memory with state generated by the database when a SQL INSERT or UPDATE is executed.

This is most useful for working with database tables where a column value is populated by a database trigger. A second possible scenario is the use of Generated(INSERT) with ColumnDefault.

• For identity/autoincrement columns mapped to an identifier property, use GeneratedValue.
• For columns with a generated always as clause, prefer the GeneratedColumn annotation.

See Also:

GeneratedValue, ColumnDefault, GeneratedColumn

Required Element Summary

Required Elements

Modifier and Type	Required Element	Description
GenerationTime	value	Specifies the events that cause the value to be generated by the database.

Element Detail

value

GenerationTime value

Specifies the events that cause the value to be generated by the database.

• If GenerationTime.INSERT, the generated value will be selected after each SQL INSERT statement is executed.
• If GenerationTime.ALWAYS, the generated value will be selected after each SQL INSERT or UPDATE statement is executed.