About value

manual

Auto Generated Values

Explains the different strategies for generating auto values (mainly for primary key fields) in JPA.... Reference Page... annotation specifies that a value will be automatically generated for that field. This is primarily ... numeric persistent fields as well. Several different value generation strategies can be used as explained below. This ...

 
api-jdo

javax.jdo.spi.StateManager

This interface is the point of contact between managed instances of PersistenceCapable classes and the JDO implementation.(Interface of JDO)

 
api-jpa

javax.persistence.TypedQuery

Interface used to control the execution of typed queries.(Interface of JPA)

 
api-jdo

javax.jdo.annotations.Value

Annotation for the value of a map relation.(Annotation of JDO)

 
api-jpa

javax.persistence.criteria.CriteriaBuilder

Used to construct criteria queries, compound selections, expressions, predicates, orderings.(Interface of JPA)

 
api-jdo

javax.jdo.annotations.Persistent

Annotation for defining the persistence of a member.(Annotation of JDO)

 
api-jpa

literal(value)

Create an expression for a literal.(Method of javax.persistence.criteria.CriteriaBuilder)

 
manual

Comparison in JPQL and Criteria API

Explains how comparison operators can be used in JPQL queries, including in comparing null values.... operator. One column presents comparison of NULL value with a non NULL value. The other column presents comparison of two NULL values: ...

 
api-jpa

javax.persistence.Query

Interface used to control query execution.(Interface of JPA)

 
api-jpa

JPA Annotations for Value Generation

Reference (JavaDoc) of JPA 2 value generation annotations, including @GeneratedValue, @SequenceGenerator and @TableGenerator.... The @GeneratedValue annotation can also reference a value generator, which is defined at the class level by using one of the ... More details about automatic value generation are provided at the Generated Value section of the ObjectDB Manual. ...