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@Target(value=TYPE) @Retention(value=RUNTIME) public @interface SecondaryTable
Specifies 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 { ... }
Required Element Summary | |
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java.lang.String |
name
(Required) The name of the table. |
Optional Element Summary | |
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java.lang.String |
catalog
(Optional) The catalog of the table. |
PrimaryKeyJoinColumn[] |
pkJoinColumns
(Optional) The columns that are used to join with the primary table. |
java.lang.String |
schema
(Optional) The schema of the table. |
UniqueConstraint[] |
uniqueConstraints
(Optional) Unique constraints that are to be placed on the table. |
Element Detail |
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public abstract java.lang.String name
public abstract java.lang.String catalog
Defaults to the default catalog.
public abstract java.lang.String schema
Defaults to the default schema for user.
public abstract PrimaryKeyJoinColumn[] pkJoinColumns
Defaults to the column(s) of the same name(s) as the primary key column(s) in the primary table.
public abstract UniqueConstraint[] uniqueConstraints
Column
and JoinColumn
annotations and constraints entailed by primary key mappings.
Defaults to no additional constraints.
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Generated on 10-February-2011 12:41