javax.persistence.JoinTable - JPA annotation
javax.persistence
Annotation JoinTable
- Target:
- Fields (including property get methods)
A join table is typically used in the mapping of many-to-many and unidirectional one-to-many associations. It may also be used to map bidirectional many-to-one/one-to-many associations, unidirectional many-to-one relationships, and one-to-one associations (both bidirectional and unidirectional).
When a join table is used in mapping a relationship with an embeddable class on the owning side of the relationship, the containing entity rather than the embeddable class is considered the owner of the relationship.
If the JoinTable
annotation is missing, the default values of the annotation elements apply. The name of the join table is assumed to be the table names of the associated primary tables concatenated together (owning side first) using an underscore.
Example:
@JoinTable( name="CUST_PHONE", joinColumns= @JoinColumn(name="CUST_ID", referencedColumnName="ID"), inverseJoinColumns= @JoinColumn(name="PHONE_ID", referencedColumnName="ID") )
- Since:
- JPA 1.0
- See Also:
-
JoinColumn
-
JoinColumns
Defaults to the default catalog.
- Default value:
- ""
- Since:
- JPA 1.0
Uses the same defaults as for JoinColumn
.
- Default value:
- {}
- Since:
- JPA 1.0
Uses the same defaults as for JoinColumn
.
- Default value:
- {}
- Since:
- JPA 1.0
Defaults to the concatenated names of the two associated primary entity tables, separated by an underscore.
- Default value:
- ""
- Since:
- JPA 1.0
Defaults to the default schema for user.
- Default value:
- ""
- Since:
- JPA 1.0
Defaults to no additional constraints.
- Default value:
- {}
- Since:
- JPA 1.0