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.valueAnnotation 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.INNEREnum Constant javax.persistence.criteria.JoinType INNER Inner join. Since: JPA 2.0 |
2 | javax.persistence.TupleElementjavax.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.pkJoinColumnsAnnotation 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.Pathjavax.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 |
