About primary key

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JDO Doc
11

javax.jdo.annotations.Join

: "" Since: JDO 2.1 String generatePrimaryKey Generate or assume a primary key constraint exists on the column or columns associated with this join. Generate or assume a primary key constraint exists on the column ... assume a primary key constraint Default value: "" Since: JDO 2.1 String index The name of the index
JDO Doc
11

javax.jdo.PersistenceManager

(primary key) JDO identity. If it is used for instances of classes using datastore identity ... javax.jdo Interface PersistenceManager PersistenceManager is the primary interface for JDO-aware ... 1.0 T getObjectById(Class cls, Object key) Looks up the instance of the given type
JPA Doc
11

javax.persistence.TableGenerator

get methods) Defines a primary key generator that may be referenced by name when a generator element ... on the primary key field or property. The scope of the generator name is global to the persistence ... of the primary key column in the table. (Optional) Name of the primary key column in the table
JDO Doc
10

javax.jdo.spi.PersistenceCapable

identity, this method must be called on an instance of a persistence-capable class with its primary key ... is initialized with the value(s) of the primary key field(s) of the instance on which the method is called ... with the values of the primary key fields of the persistence-capable instance on which the method
JDO Doc
10

javax.jdo.annotations.ForeignKey

. This is needed iff annotating a type where the foreign key is not defined on the primary table ... get methods) Annotation for a database foreign-key. Corresponds to the xml element "foreign-key". Since: JDO 2.1 Column[] columns Columns that compose this foreign key. Columns that compose this foreign key
JPA Doc
10

javax.persistence.MapKeyColumn

applies in addition to any constraint entailed by primary key mapping and to constraints specified ... the mapping for the key column of a map whose map key is a basic type. If the name element is not ... relationship field or property; "_"; "KEY". Example: @Entity public class Item { @Id int id
JPA Doc
9

javax.persistence.GenerationType

, Comparable Defines the types of primary key generation strategies. Since: JPA 1.0 ... must assign primary keys for the entity using a database identity column. Indicates that the persistence provider must assign primary keys for the entity using a database identity column. Since: JPA 1.0
JDO Doc
9

javax.jdo.annotations.Persistent

Since: JDO 2.1 String primaryKey Whether this member is part of the primary key for application identity. Whether this member is part of the primary key for application identity. This is equivalent ... is part of the primary key Default value: "" Since: JDO 2.1 int recursionDepth Recursion depth
JPA Doc
9

javax.persistence.SequenceGenerator

get methods) Defines a primary key generator that may be referenced by name when a generator element ... class or on the primary key field or property. The scope of the generator name is global ... to be the generator for primary key values. (Required) A unique generator name that can be referenced by
JDO Doc
9

javax.jdo.spi.JDOImplHelper

has no relationship with the values of the primary key fields of the persistence-capable instance ... - the PersistenceCapable class used as the key for lookup. fieldNames - an array of String field names ... to an outside source from the key fields in the ObjectId. Copy fields to an outside source from