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, a full iteration over the Cartesian product is avoided. [ INNER ] JOIN As discussed above, range ... variable: SELECT c1, c2 FROM Country c1 INNER JOIN c1.neighbors c2 In JPQL, JOIN can only appear in a FROM clause. The INNER keyword is optional (i.e. INNER JOIN is equivalent to JOIN ). c1 is declared

an inner join . Inherited from FetchParent Parameters: attribute - target of the join Returns ... ) Create a fetch join to the specified collection-valued attribute using an inner join . Inherited ... attribute using an inner join . Inherited from FetchParent Parameters: attributeName - name

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.criteria.JoinType INNER Inner join . Since: Jakarta Persistence (JPA) 1.0

How write a query in JPA2 with LEFT JOIN on INNER JOIN ? select a.description, a.id, p1.description ... inner join profile p1 on ap1.id_profile=p1.id and p1.name='?' left join action_profile ap2 on ap2.id_action=a.id inner join profile p2 on ap2.id_profile=p2.id and p2.name='?' where a.id =?;   Thanks

) Create a fetch join to the specified single-valued attribute using an inner join . Inherited from ... to the specified collection-valued attribute using an inner join . Inherited from FetchParent Parameters ... fetch ( String attributeName ) Create a fetch join to the specified attribute using an inner join

a fetch join to the specified single-valued attribute using an inner join . Inherited from FetchParent ... collection-valued attribute using an inner join . Inherited from FetchParent Parameters: attribute ... attributeName ) Create a fetch join to the specified attribute using an inner join . Inherited from

a fetch join to the specified single-valued attribute using an inner join . Inherited from ... collection-valued attribute using an inner join . Inherited from FetchParent Parameters: attribute ... ( String attributeName ) Create a fetch join to the specified attribute using an inner join . Inherited

( SingularAttribute attribute ) Create a fetch join to the specified single-valued attribute using an inner ... a fetch join to the specified collection-valued attribute using an inner join . Inherited from ... using an inner join . Inherited from FetchParent Parameters: attributeName - name of the attribute

) Create a fetch join to the specified single-valued attribute using an inner join . Inherited from ... to the specified collection-valued attribute using an inner join . Inherited from FetchParent Parameters ... ( String attributeName ) Create a fetch join to the specified attribute using an inner join

join to the specified single-valued attribute using an inner join . Inherited from FetchParent ... -valued attribute using an inner join . Inherited from FetchParent Parameters: attribute - target ... attributeName ) Create a fetch join to the specified attribute using an inner join . Inherited from

using an inner join . Inherited from FetchParent Parameters: attribute - target of the join Returns ... attribute ) Create a fetch join to the specified collection-valued attribute using an inner join ... attribute using an inner join . Inherited from FetchParent Parameters: attributeName - name

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From Join join (    SingularAttribute attribute ) Create an inner join to the specified single-valued attribute. Parameters: attribute - target of the join Returns: the resulting join . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From Join join (    EntityType entity ) Create and add an inner join to the given entity. Parameters: entity - metamodel entity representing the join target Returns: the resulting join . Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From Join join (    String attributeName ) Create an inner join to the specified attribute. Parameters: attributeName - name of the attribute for the target of the join Returns: the resulting join . Throws

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From CollectionJoin join (    CollectionAttribute collection ) Create an inner join to the specified Collection -valued attribute. Parameters: collection - target of the join Returns: the resulting join . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From Join join (    Class entityClass ) Create and add an inner join to the given entity. Parameters: entityClass - the target entity class Returns: the resulting join . Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From SetJoin join (    SetAttribute set ) Create an inner join to the specified Set -valued attribute. Parameters: set - target of the join Returns: the resulting join . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From ListJoin join (    ListAttribute list ) Create an inner join to the specified List -valued attribute. Parameters: list - target of the join Returns: the resulting join . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From MapJoin join (    MapAttribute map ) Create an inner join to the specified Map -valued attribute. Parameters: map - target of the join Returns: the resulting join . Since: Jakarta Persistence (JPA) 1.0

, max) - for paging. Query Structure SELECT (including NEW ). FROM (including INNER JOIN , LEFT OUTER ... ( composite ) indices. Collection and array elements are indexable (extremely fast JOIN queries ... optimizations. Configurable JPA eager/lazy fetch  and JPA query FETCH JOIN . Configurable JDO fetch

using an inner join . Inherited from FetchParent Parameters: attribute - target of the join Returns ... attribute ) Create a fetch join to the specified collection-valued attribute using an inner join ... to the specified attribute using an inner join . Inherited from FetchParent Parameters: attributeName - name

( SingularAttribute attribute ) Create a fetch join to the specified single-valued attribute using an inner ... attribute using an inner join . Parameters: attribute - target of the join Returns: the resulting join ... an inner join . Parameters: attributeName - name of the attribute for the target of the join Returns

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder Join treat (    Join join ,    Class type ) Downcast Join object to the specified type. Parameters: join - Join object type - type to be downcast to Returns: Join object of the specified type. Since: Jakarta Persistence (JPA) 2.1

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From Join join (    SingularAttribute attribute ,    JoinType jt ) Create a join to the specified single-valued attribute using the given join type. Parameters: jt - join type attribute - target of the join

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From Join join (    String attributeName ,    JoinType jt ) Create a join to the specified attribute using the given join type. Parameters: attributeName - name of the attribute for the target of the join jt

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.Subquery Join correlate (    Join parentJoin ) Create a subquery join object correlated to a join object of the enclosing query. Parameters: parentJoin - join object of the containing query Returns: subquery join . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From Join join (    EntityType entity ,    JoinType joinType ) Create and add a join to the given entity. Parameters: entity - metamodel entity representing the join target joinType - join type Returns: the resulting join . Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From SetJoin join (    SetAttribute set ,    JoinType jt ) Create a join to the specified Set -valued attribute using the given join type. Parameters: jt - join type set - target of the join Returns: the resulting join . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From ListJoin join (    ListAttribute list ,    JoinType jt ) Create a join to the specified List -valued attribute using the given join type. Parameters: jt - join type list - target of the join Returns: the resulting join . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From MapJoin join (    MapAttribute map ,    JoinType jt ) Create a join to the specified Map -valued attribute using the given join type. Parameters: jt - join type map - target of the join Returns: the resulting join . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From CollectionJoin join (    CollectionAttribute collection ,    JoinType jt ) Create a join to the specified Collection -valued attribute using the given join type. Parameters: jt - join type collection - target

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria. Join Join on (    Expression restriction ) Modify the join to restrict the result according to the specified ON condition and return the join object. Replaces the previous ON condition, if any. Parameters: restriction

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria. Join Join on (    Predicate... restrictions ) Modify the join to restrict the result according to the specified ON condition and return the join object. Replaces the previous ON condition, if any. Parameters: restrictions

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From Join join (    Class entityClass ,    JoinType joinType ) Create and add a join to the given entity. Parameters: entityClass - the target entity class joinType - join type Returns: the resulting join . Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria. Join Attribute getAttribute() Return the metamodel attribute representing the join target, if any, or null if the target of the join is an entity type. Returns: metamodel attribute or null. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria. Join From getParent() Return the parent of the join . Returns: join parent. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria. Join JoinType getJoinType() Return the join type. Returns: join type. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria. Join Predicate getOn() Return the predicate that corresponds to the ON restriction(s) on the join , or null if no ON condition has been specified. Returns: the ON restriction predicate. Since: Jakarta Persistence (JPA) 2.1

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.InheritanceType JOINED A table for each abstract or concrete entity class, with only the columns mapped to persistent fields ... instance might be stored across multiple table rows. A join is used to retrieve the state of such entities. Since: Jakarta Persistence (JPA) 1.0

, Serializable Defines the three varieties of join . Support for RIGHT outer joins is not required. Applications which make use of right joins might not be portable between providers or between SQL databases. Since: Jakarta Persistence (JPA) 2.0 Enum Constants INNER Inner join . Since: Jakarta Persistence

: should be a top-level class (i.e. not a nested / inner class). should have a public or protected ... is slightly less restrictive: Static nested entity classes are allowed (non static inner classes

the equivalent JOIN query. Entity Type Expressions The TYPE operator (which is new in JPA 2) returns the type ... its subinterfaces ( From , Root , Join and Join 's descendants). Path Expressions The Root and Join interfaces ... Variable Paths: Root country = query. from (Country.class); Join neighborCountry = country. join

. Whenever possible: Use a single Java file with one main class + static inner classes for entity

variables (bound by an entity class) are represented by the Root subinterface: Join variables (bound by an attribute of a preceding variable in the FROM clause) are represented by the Join subinterface ... and examples. Join Fetch Elements Join Fetch is managed in criteria queries by the following interfaces

must: be a non- final top-level class or static inner class, have a public or protected constructor ... the associated entity , and a many-to-many association usually maps to a join table . Every entity

;  String attributeName ) Create a fetch join to the specified attribute using an inner join . Parameters: attributeName - name of the attribute for the target of the join Returns: the resulting fetch join . Throws: IllegalArgumentException - if attribute of the given name does not exist. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.FetchParent Fetch fetch (    SingularAttribute attribute ) Create a fetch join to the specified single-valued attribute using an inner join . Parameters: attribute - target of the join Returns: the resulting fetch join . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.FetchParent Fetch fetch (    PluralAttribute attribute ) Create a fetch join to the specified collection-valued attribute using an inner join . Parameters: attribute - target of the join Returns: the resulting join . Since: Jakarta Persistence (JPA) 1.0

joinCollection (    String attributeName ) Create an inner join to the specified Collection -valued attribute. Parameters: attributeName - name of the attribute for the target of the join Returns: the resulting join . Throws: IllegalArgumentException - if attribute of the given name does not exist. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.From SetJoin joinSet (    String attributeName ) Create an inner join to the specified Set -valued attribute. Parameters: attributeName - name of the attribute for the target of the join Returns: the resulting join . Throws