| This annotation is used to specify a secondary table for
the annotated entity class. Specifying one or more secondary
tables indicates that the data for the entity class is stored
across multiple tables.
If no SecondaryTable annotation is specified,
it is assumed that all persistent fields or properties of the
entity are mapped to the primary table. If no primary key join
columns are specified, the join columns are assumed to reference
the primary key columns of the primary table, and have the same
names and types as the referenced primary key columns of the
primary table.
Example 1: Single secondary table with a single primary key column.
@Entity
@Table(name="CUSTOMER")
@SecondaryTable(name="CUST_DETAIL",
pkJoinColumns=@PrimaryKeyJoinColumn(name="CUST_ID"))
public class Customer { ... }
Example 2: Single secondary table with multiple primary key columns.
@Entity
@Table(name="CUSTOMER")
@SecondaryTable(name="CUST_DETAIL",
pkJoinColumns={
@PrimaryKeyJoinColumn(name="CUST_ID"),
@PrimaryKeyJoinColumn(name="CUST_TYPE")})
public class Customer { ... }
|
