Criteria Query From Elements

The interfaces in this group are in use for setting a criteria query FROM clause.

Criteria Query Variables

The FROM clause in JPA queries (as in SQL) defines the query variables. Query variables are represented in criteria queries by descendant interfaces of the From interface:

• javax.persistence.criteria.From - JPA Interface

Range variables (bound by an entity class) are represented by the Root subinterface:

• javax.persistence.criteria.Root - JPA Interface

Join variables (bound by an attribute of a preceding variable in the FROM clause) are represented by the Join subinterface and its descendant interfaces:

• javax.persistence.criteria.Join - JPA Interface
• javax.persistence.criteria.PluralJoin - JPA Interface
• javax.persistence.criteria.CollectionJoin - JPA Interface
• javax.persistence.criteria.SetJoin - JPA Interface
• javax.persistence.criteria.ListJoin - JPA Interface
• javax.persistence.criteria.MapJoin - JPA Interface
• javax.persistence.criteria.JoinType - JPA Enum

See the FROM in Criteria Queries section for more details and examples.

Join Fetch Elements

Join Fetch is managed in criteria queries by the following interfaces:

• javax.persistence.criteria.Fetch - JPA Interface
• javax.persistence.criteria.FetchParent - JPA Interface

See the FROM in Criteria Queries section for more details and an example.