This annotation is specified when multiple @JoinColumns that indicate the same relationship are coded concurrently. @JoinColumns defines the mapping of the compound external key.

The applicable targets are method and field.

The following table lists the elements of @JoinColumns:

Element name	Optional/Required	Element description
value	Required	This element specifies an array of @JoinColumn.

The details of attributes that are supported with Cosminexus JPA provider are as follows:

(a) value element

Type

JoinColumn[]

Description

This element specifies an array of @JoinColumn.

The values can be specified within the specifiable range of the arrays of @JoinColumn.

Default value

None