ObjectDB ObjectDB

Internal Website Search

161-170 of 200 resultsRefresh
2

each 1-2 days objects on some objectdb level lock/block each other

Zwicker here are some typical queries: select o from ObjectNode o join o.properties p1 join o ... distinct o from ObjectNode o join o.properties p1 join o.properties p2 where (o.classIdentifier ... = "startableState" and p2.doubleValue = 0))) select distinct o from ObjectNode o join o.properties p1
2

MapKeyJoinColumns.value

Annotation Element javax.persistence.MapKeyJoinColumns MapKeyJoinColumn[] value (Required) The map key join columns that are used to map to the entity that is the map key. Since: JPA 2.0
2

JoinType.INNER

Enum Constant javax.persistence.criteria.JoinType INNER Inner join. Since: JPA 2.0
2

javax.persistence.TupleElement

javax.persistence Interface TupleElement<X> Subinterfaces: CollectionJoin, CompoundSelection, Case, Coalesce, In, SimpleCase, Expression, From, Join, ListJoin, MapJoin, ParameterExpression, Path, PluralJoin, Predicate, Root, Selection, SetJoin, Subquery The TupleElement interface defines an element
2

getModel()

Method javax.persistence.criteria.ListJoin ListAttribute<?,E> getModel() Return the metamodel representation for the list attribute. Returns: metamodel type representing the List that is the target of the join Since: JPA 2.0
2

javax.persistence.Inheritance

@Inheritance(strategy=JOINED) public class Customer { ... } @Entity public class
2

getModel()

Method javax.persistence.criteria.MapJoin MapAttribute<?,K,V> getModel() Return the metamodel representation for the map attribute. Returns: metamodel type representing the Map that is the target of the join Since: JPA 2.0
2

SecondaryTable.pkJoinColumns

Annotation Element javax.persistence.SecondaryTable PrimaryKeyJoinColumn[] pkJoinColumns (Optional) The columns that are used to join with the primary table. Defaults to the column(s) of the same name(s) as the primary key column(s) in the primary table. Default value: {} Since: JPA 1.0
2

javax.persistence.criteria.Path

javax.persistence.criteria Interface Path<X> Superinterfaces: Expression<X>, Selection<X>, TupleElement<X> Subinterfaces: CollectionJoin, From, Join, ListJoin, MapJoin, PluralJoin, Root, SetJoin Represents a simple or compound attribute path from a bound type or collection, and is a "primitive
2

JoinColumn.unique

specify this for a join column that corresponds to a primary key that is part of a foreign key. Default value: false Since: JPA 1.0

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

Need Help?

  1. Search ObjectDB website
  2. Read the FAQ
  3. Follow the Tutorials
  4. View or post in the forum
  5. Search or file an issue
  6. Contact support