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SELECT clause (JPQL / Criteria API)

/jpa/persistence/delete">delete, etc. Query results are not limited to entity objects ... must always be specified explicitly - JPQL does not support the "SELECT *" expression ... > JPQL queries can also return results that are not entity objects. For example, the following

JPA Query Expressions (JPQL / Criteria)

;=,>, >=, IS [NOT] NULL, [NOT] BETWEEN, including Collection operators: [NOT] IN, IS [NOT] EMPTY, [NOT] MEMBER [OF] and the [NOT] LIKE operator.

Privacy Policy

You and to process payments by You. Personally identifiable information may include, but is not ... , including, but not limited to, the type of mobile device You use, Your mobile device unique ID ... Your browser to refuse all Cookies or to indicate when a Cookie is being sent. However, if You do not

JPA Primary Key

primary key is not required. But ObjectDB also supports explicit standard JPA primary keys ... part of their containing entity objects and do not have their own separate identity. not recycled when entity objects

Database Management Settings

, indicating that it has not been closed properly. Moving or copying a database file that has not ... to automatically fix a database that has not been closed properly by running the not. It can be disabled by setting the 

JPA / JDO Class Enhancer

, however, where enhancement is required. Non persistable classes that access directly (not through methods ... required by JPA but not enforced by ObjectDB) to avoid accessing persistent fields of other classes ... specified class that does not need to be enhanced. Enhancement improves efficiency in three ways

Literals in JPQL and Criteria Queries

(e.g. 077, 077L), a feature that is not currently supported ... >) but this is not supported by all the JPA implementations. Unlike most other JPQL components, String ... > are not equivalent. Date and Time Literals JPQL follows the syntax of SQL

Shared (L2) Entity Cache

class which is not marked with @Cacheable inherits cacheability setting from its super ... cache is used for entity objects that are not in the persistence context. If an entity object is not ... /BYPASS"> - cache is not used. The default setting is

javax.persistence.EntityManager

to become detached. Changes made to entities that have not been flushed to the database will not ... > IllegalArgumentException - if not an entity IllegalArgumentException - if a query has not been defined

javax.jdo.JDOEntityManager

> cache with the datastore. This method has no effect if a transaction is not active ... > were called, but it is not required to do so. If an optimistic transaction is active ... to become detached. Changes made to entities that have not been flushed to the database will not