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12

ObjectDB Object Database Features

solution. General Highly optimized code (as a result of many profiling sessions). Unique data structures and algorithms (as a result of years of R&D). Outperforms competing products. Connection Pooling ... with different arguments). Query result cache (for repeating queries with the same arguments). Many
Manual
12

JPA Criteria API Queries

, the range variable, c, is also used in the SELECT clause as the query result expression ... ); List results = query.getResultList(); Using the criteria API introduces some extra work ... ); List results = query.getResultList(); Because eventually both types of queries
Manual
12

JPA Named Queries

dynamically into the query string and results in more efficient queries. @NamedQuery ... are used to instantiate them. The createNamedQuery method receives a query name and a result type ... .findAll", Country.class); List results = query.getResultList(); Another form
JPA Doc
11

javax.persistence.criteria.Subquery

. Warning: may result in a runtime failure. Parameters: type - intended type of the expression Returns ... Subquery distinct(boolean distinct) Specify whether duplicate query results will be eliminated. Specify whether duplicate query results will be eliminated. A true value will cause duplicates
JPA Doc
10

javax.persistence.TypedQuery

and the transaction is rolled back Since: JPA 1.0 int getFirstResult() The position of the first result the query object was set to retrieve. The position of the first result the query object was set to retrieve ... result Since: JPA 2.0 ObjectDB Notes: Learn how to define and use JPA/JPQL queries in Chapter 4
Manual
10

Index Definition

AND p.x <= 80 By using an index on field x, ObjectDB can find the results using a range scan ... scan can be performed. ObjectDB also uses indexes for sorting results and for projection: SELECT ... the index the results would already be produced in the requested order (the order of the scan
JPA Doc
10

javax.persistence.criteria.CollectionJoin

> The CollectionJoin interface is the type of the result of joining to a collection ... is not changed. Warning: may result in a runtime failure. Parameters: type - intended type ... for the target of the join Returns: the resulting fetch join Throws: IllegalArgumentException - if attribute
JPA Doc
10

javax.persistence.criteria.ListJoin

interface is the type of the result of joining to a collection over an association or element ... : may result in a runtime failure. Parameters: type - intended type of the expression Returns: new ... : the resulting fetch join Throws: IllegalArgumentException - if attribute of the given name does
JPA Doc
10

javax.persistence.criteria.MapJoin

> The MapJoin interface is the type of the result of joining to a collection over an association or element ... : may result in a runtime failure. Parameters: type - intended type of the expression Returns: new ... of the join Returns: the resulting fetch join Throws: IllegalArgumentException - if attribute of the given
JPA Doc
10

javax.persistence.criteria.SetJoin

interface is the type of the result of joining to a collection over an association or element ... : may result in a runtime failure. Parameters: type - intended type of the expression Returns: new ... : the resulting fetch join Throws: IllegalArgumentException - if attribute of the given name does not