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MapKeyJoinColumn.columnDefinition - JPA annotation element

Annotation Element
javax.persistence.MapKeyJoinColumn
String columnDefinition

(Optional) The SQL fragment that is used when generating the DDL for the column. Defaults to SQL generated by the provider for the column.
Default value:
""
Since:
JPA 2.0

This documentation page is derived (with some adjustments) from the open source JPA 2 RI (EclipseLink)
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
Object Relational Mapping (ORM) JPA 2 providers include Hibernate, EclipseLink, TopLink, OpenJPA and DataNucleus.
ObjectDB is not an ORM JPA implementation but an Object Database for Java with built in JPA 2 support.