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MapKeyJoinColumn.columnDefinition

the DDL for the column. Defaults to SQL generated by the provider for the column.

javax.persistence.MapKeyJoinColumns

> (Required) The map key join columns that are used to map ... "> (Required) The map key join columns that are used to map to the entity that is the map key

javax.persistence.GenerationType

a database identity column. Indicates that the persistence provider must assign primary keys for the entity using a database identity column.

MapKeyColumn.unique

class="description"> (Optional) Whether the column is a unique key. This is a shortcut ... for when the unique key constraint corresponds to only a single column. This constraint applies in addition to any

MapKeyColumn.precision

class="description"> (Optional) The precision for a decimal (exact numeric) column. (Applies only if a decimal column is used.) Default: 0. (The value must be set by the developer.)

MapKeyColumn.scale

="description"> (Optional) The scale for a decimal (exact numeric) column. (Applies only if a decimal column is used.) Default value:

Element.generateForeignKey

on the column or columns associated with this join. Specify "true" or "false".

Element.indexed

> Whether the value column(s) should be indexed. Returns: whether the value column(s

Key.generateForeignKey

on the column or columns associated with this join. Specify "true" or "false".

Key.indexed

class="description"> Whether the value column(s) should be indexed. Returns: whether the value column(s