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Marking a field with the @GeneratedValue annotation specifies that a value will be automatically ... also supports this annotation for non-key numeric persistent fields as well. Several different value generation ... number generator is also used to generate numeric values for primary key fields annotated by

Automatically generated values are mainly useful for primary key fields, but are supported by ... can also reference a value generator, which is defined at the class level by using one of the following annotations: More details about automatic value generation are provided at the Generated Value section of the ObjectDB Manual.

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder.In In value (    T value ) Add to list of values to be tested against. Parameters: value - value Returns: in predicate. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder.In In value (    Expression value ) Add to list of values to be tested against. Parameters: value - expression Returns: in predicate. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder.Coalesce Coalesce value (    T value ) Add an argument to the coalesce expression. Parameters: value - value Returns: coalesce expression. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.DiscriminatorValue String value (Optional) The value that indicates that the row is an entity of the annotated entity type ... is used to generate a value representing the entity type. If the DiscriminatorType is STRING

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.MapJoin Path value () Create a path expression that corresponds to the map value . This method is for stylistic use only: it just returns this. Returns: path corresponding to the map value . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder.Coalesce Coalesce value (    Expression value ) Add an argument to the coalesce expression. Parameters: value - expression Returns: coalesce expression. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.PersistenceProperty String value The value of the property Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder Expression values (    M map ) Create an expression that returns the values of a map. Parameters: map - map Returns: collection expression. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.QueryHint String value Value of the hint. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.AttributeOverrides AttributeOverride[] value (Required) One or more field or property mapping overrides. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.PersistenceContexts PersistenceContext[] value (Required) One or more PersistenceContext annotations. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.metamodel.StaticMetamodel Class value Class being modelled by the annotated class. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.Temporal TemporalType value The type used in mapping Date or Calendar . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.TableGenerators TableGenerator[] value Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.IdClass Class value The primary key class, which must declare fields or properties with names and types that match the Id fields and properties of the annotated entity class. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.Enumerated EnumType value (Optional) The type used in mapping an enum type. Default: ORDINAL Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.ForeignKey ConstraintMode value (Optional) Used to specify whether a foreign key constraint should be generated when schema generation is in effect. ConstraintMode.CONSTRAINT specifies that the persistence provider must generate a foreign key

Jakarta Persistence (JPA) Method in jakarta.persistence.OrderBy String value An orderby_list . Specified as follows: orderby_list::= orderby_item [,orderby_item]* orderby_item::= [property_or_field_name] [ASC | DESC] If ASC or DESC is not specified, ASC (ascending order) is assumed

Jakarta Persistence (JPA) Method in jakarta.persistence.NamedEntityGraphs NamedEntityGraph[] value Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.NamedNativeQueries NamedNativeQuery[] value (Required) Array of NamedNativeQuery annotations. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.NamedStoredProcedureQueries NamedStoredProcedureQuery[] value (Required) Array of NamedStoredProcedureQuery annotations. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.NamedQueries NamedQuery[] value (Required) An array of NamedQuery annotations. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.MapKeyClass Class value (Required) The type of the map key. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.MapKeyEnumerated EnumType value (Optional) The type used in mapping a map key enum type. Default: EnumType.ORDINAL Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.MapKeyTemporal TemporalType value (Required) The type used in mapping java.util.Date or java.util.Calendar . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.MapsId String value (Optional) The name of the attribute within the composite key to which the relationship attribute corresponds. If not explicitly specified, the relationship maps the primary key of the entity. Default: "" Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.NamedAttributeNode String value (Required) The name of the attribute that must be included in the graph. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.MapKeyJoinColumns MapKeyJoinColumn[] value (Required) The map key join columns that are used to map to the entity that is the map key. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.JoinColumns JoinColumn[] value The join columns that map the relationship. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.SecondaryTables SecondaryTable[] value (Required) The secondary tables for an entity. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.Converts Convert[] value The Convert mappings that are to be applied. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.SequenceGenerators SequenceGenerator[] value Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.SqlResultSetMappings SqlResultSetMapping[] value One or more SqlResultSetMapping annotations. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityListeners Class [] value The callback listener classes Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.Cacheable boolean value (Optional) Whether or not the entity should be cached. Default: true Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.PersistenceUnits PersistenceUnit[] value (Required) One or more PersistenceUnit annotations. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.PrimaryKeyJoinColumns PrimaryKeyJoinColumn[] value One or more PrimaryKeyJoinColumn annotations. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.Access AccessType value (Required) Specification of field- or property-based access. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.AssociationOverrides AssociationOverride[] value (Required) The association override mappings that are to be applied to the relationship field or property. Since: Jakarta Persistence (JPA) 1.0

. Besides the different notation, there is also a difference in the way that NULL values are handled by these operators. Comparing NULL values The following table shows how NULL values are handled by each comparison operator. One column presents a comparison of NULL value with a non NULL value

Numeric values may appear in JPQL queries in many forms: as  numeric literals - e.g. 123 , -12.5 . as parameters - when numeric values are assigned as arguments. as  path expressions - in ... functions - when the return value is numeric, e.g. INDEX, SIZE. as string functions - when the return

: The properties that are used for grouping (each group has a unique value combination). Aggregate calculations ... of SQL: COUNT - returns a long value representing the number of elements. SUM - returns the sum of numeric values . AVG - returns the average of numeric values as a double value . MIN - returns the minimum

, Date and Math types. Multi value types - Collections, Maps and Arrays. Miscellaneous types: Enum ... classes that function as value types. As with other non entity types, instances of an embeddable ... when they are stored in the database. Multi Value Types The following multi value types are persistable

with different parameter values to retrieve different results. Running the same query multiple times with different parameter values (arguments) is more efficient than using a new query string for every query ... ). getSingleResult (); } The WHERE clause reduces the query results to Country objects whose name field value

keys and automatic sequential value generation . This is a very powerful feature of ObjectDB ... and its primary key. Primary key values are unique per entity class. Instances of different entity classes, however, may share the same primary key value . Only entity objects have primary keys

that do not participate in persistence and their values are never stored in the database (similar ... the database every persistent field must contain either null or a value of one of the supported ... a generic java.lang.Object , as long as the type of the actual value at runtime is persistable (or null

that prevents duplicate values in the indexed field. A PersistenceException is thrown on commit (or flush) if different entities have the same value in a unique field (similar to how primary keys behave ... every indexed field must contain either null or a value of one of the following persistable types

and resize values save space. Larger values can improve performance by reducing file fragmentation (many ... the database. The element specifies the recovery file settings: The enabled attribute (whose value is "true" or "false" ) specifies if a recovery file is used. The sync attribute (whose value is "true