SecondaryTables (Java EE 5 SDK)

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Java EE 5 SDK

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摘要: REQUIRED | OPTIONAL

详细信息: ELEMENT

javax.persistence Annotation Type SecondaryTables

@Target(value=TYPE) @Retention(value=RUNTIME) public @interface SecondaryTables

This annotation is used to specify multiple secondary tables for an entity.

    Example 1: Multiple secondary tables assuming primary key columns are named the same in all tables.

    @Entity
    @Table(name="EMPLOYEE")
    @SecondaryTables({
        @SecondaryTable(name="EMP_DETAIL"),
        @SecondaryTable(name="EMP_HIST")
    })
    public class Employee { ... }
    
    Example 2: Multiple secondary tables with differently named primary key columns. 

    @Entity
    @Table(name="EMPLOYEE")
    @SecondaryTables({
        @SecondaryTable(name="EMP_DETAIL", 
            pkJoinColumns=@PrimaryKeyJoinColumn(name="EMPL_ID")),
        @SecondaryTable(name="EMP_HIST", 
            pkJoinColumns=@PrimaryKeyJoinColumn(name="EMPLOYEE_ID"))
    })
    public class Employee { ... }