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Manual
10

JPA Primary Key

an object database, ObjectDB supports implicit object IDs, so an explicitly defined primary key is not ... of other persistable types are always stored as part of their containing entity objects and do not ... of the second entity object is 2, etc. Primary key values are not recycled when entity objects
Manual
9

Database Management Settings

ObjectDB when a database is opened and a recovery file exists, indicating that it has not been closed properly. Moving or copying a database file that has not been closed properly without its recovery file ... a database that has not been closed properly by running the Replayer tool. Recording might also be useful
Manual
9

JPA / JDO Class Enhancer

. There is one case, however, where enhancement is required. Non persistable classes that access directly ( not ... (and actually required by JPA but not enforced by ObjectDB) to avoid accessing persistent fields ... classes should need to be enhanced. The enhancer silently ignores any specified class that does not need
Manual
9

Literals in JPQL and Criteria Queries

, 077L), a feature that is not currently supported by all JPA implementations. String Literals JPQL ... ", "abcd\n1234") but this is not supported by all the JPA implementations. Unlike most other JPQL components, String literals (which represent data) are case sensitive, so 'abc' and 'ABC' are not
Manual
9

Shared (L2) Entity Cache

- every entity class which is not marked with @Cacheable inherits cacheability setting from its super ... automatically: On retrieval - shared cache is used for entity objects that are not in the persistence context. If an entity object is not available also in the shared cache - it is retrieved from
JPA Doc
8

javax.persistence.EntityManager

entities to become detached. Changes made to entities that have not been flushed to the database will not ... - if not an entity Since: JPA 1.0 Query createNamedQuery(String name) Create an instance of Query ... : IllegalArgumentException - if a query has not been defined with the given name or if the query
Manual
8

Deleting JPA Entity Objects

back and not committed the object is not deleted. An IllegalArgumentException is thrown by remove if the argument is not a an instance of an entity class or if it is a detached entity ... up dependent objects (e.g. Address) that should not exist without a reference from an owner object
Manual
8

Schema Update

. The default configuration file contains an empty element. If the element is not empty ... package name. In addition, whether or not a new-name attribute is specified a element ... .example.old3 package is not renamed, but rename operations are specified for some of its classes
Manual
8

Strings in JPQL and Criteria Queries

Pattern Matching with Wildcards The [ NOT] LIKE operator checks if a specified string matches ... '%' is always TRUE (for any c.name value). c.name NOT LIKE '%' is always FALSE (for any c.name value ... of the first character is 1. Zero (0) is returned if the substring is not found. The third argument
JPA Doc
8

javax.persistence.TypedQuery

. Returns 0 if setFirstResult was not applied to the query object. Returns: position of the first ... . Get the flush mode in effect for the query execution. If a flush mode has not been set ... Throws: IllegalStateException - if the query is found not to be a Java Persistence query language