About query

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JDO Doc
32

setGrouping(group)

Method javax.jdo.Query void setGrouping(   String group ) Set the grouping expressions, optionally including a "having" clause. When grouping is specified, each result expression must either be an expression contained in the grouping, or an aggregate evaluated once per group. Parameters: group
JDO Doc
32

setOrdering(ordering)

Method javax.jdo.Query void setOrdering(   String ordering ) Set the ordering specification for the result Collection. The ordering specification is a String containing one or more ordering declarations separated by commas. Each ordering declaration is the name of the field on which to order
JPA Doc
27

javax.persistence.TypedQuery

javax.persistence Interface TypedQuery Superinterfaces: Query Interface used to control the execution of typed queries. Since: JPA 2.0 See Also: Query Parameter Learn how to define and use JPA/JPQL queries in Chapter 4 of the ObjectDB/JPA manual.   int executeUpdate() Execute an update or delete
JDO Doc
25

javax.jdo.JDOEntityManager

: IllegalArgumentException - if not an entity Since: JPA 1.0 Query createNamedQuery(String name) Create an instance of Query for executing a named query (in the Java Persistence query language or in native SQL). Create an instance of Query for executing a named query (in the Java Persistence query language or in
JPA Doc
23

javax.persistence.criteria.CriteriaQuery

> The CriteriaQuery interface defines functionality that is specific to top-level queries. Since: JPA 2.0 Learn how to define queries using the criteria API in Chapter 4 of the ObjectDB/JPA manual.   AbstractQuery distinct(boolean distinct) Specify whether duplicate query results will be eliminated. Specify
Manual
21

JPA Entity Fields

the database, but is still available after retrieval by a special automatic query. Note: Navigation ... , since it requires running queries. Inverse fields are essential for collection fields when using ORM JPA ... the database. ObjectDB accomplishes this by effectively running the following query (where :d represents
Manual
20

Online Backup

Backup The online backup can be started by executing a special query on an EntityManager (em ... ").getSingleResult(); The backup query string is always exactly "objectdb backup". The backup ... query:     Query backupQuery = em.createQuery("objectdb backup");     backupQuery.setParameter
Result
20

What is new in ObjectDB 2.0?

keys size. SQL like queries ("select from ... where ..."). Real non blocking multithreading in query execution. Support of composite indexes and using indexes in query result sort. Improved query ... (PersistenceManagerFactory scope) object data cache. Query program cache for repeating queries
Forum
19

JPA Query language support in OBjectDB / Sub query or nested Query

have given a sample typed query below which fails to work with ObjectDB and it runs very well with the Hibernate/MySQL JPA. We are using Spring Data here. It looks like a problem with Sub query or nested queries where I am using IN clause like below. @Query("SELECT product FROM Product product
JDO Doc
18

javax.jdo.PersistenceManager

application components. It is the factory for Query and Transaction instances, and contains methods ... of instances in the data store that might be iterated or given to a Query. The Extent itself might not ... of the specified Class Since: JDO 1.0 See Also: Query FetchGroup getFetchGroup(Class cls, String name