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Forum
7

Deploy ObjectDB in WildFly 10

get an error: 017-10-23 09:23:31,715 INFO  [org.jboss.as.jpa] WFLYJPA0002: Read persistence.xml ... to process phase FIRST_MODULE_USE of deployment "omd-in-memory-db.jar"         at org.jboss.as.server ... : PersistenceProvider 'com.objectdb.jpa.Provider' not found         at org.jboss.as.jpa.processor
Manual
7

Strings in JPQL and Criteria Queries

String values may appear in JPQL queries in various forms: as string literals - e.g. 'abc', ''. as parameters - when string values are assigned as arguments. as path expressions - in navigation to persistent string fields. as results of predefined JPQL string manipulation functions. LIKE - String
Manual
6

Database Explorer

it from the command line as follows: > java -jar explorer.jar If explorer.jar is not in the current ... and JDOQL queries, as discussed below. Closing a Database Connection Use the File > Close menu command ... . A Tree window displays objects as a tree. Every database object is represented by a tree node
Manual
6

Numbers in JPQL and Criteria Queries

Numeric values may appear in JPQL queries in many forms: as numeric literals - e.g. 123, -12.5. as parameters - when numeric values are assigned as arguments. as path expressions - in navigation to persistent numeric fields. as aggregate expressions - e.g. COUNT. as collection functions
Result
6

Apache License, Version 2.0, January 2004

the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 ... mean the work of authorship, whether in Source or Object form, made available under the License, as ... , elaborations, or other modifications represent, as a whole, an original work of authorship
Manual
6

Query Parameters in JPA

whose name field value is equal to :name, which is a parameter that serves as a placeholder ... (:) followed by a valid JPQL identifier that serves as the parameter name. JPA does not provide an API ... . Criteria Query Parameters In a JPA query that is built by using the JPA Criteria API - parameters (as
Manual
6

Retrieving JPA Entity Objects

of the database. The persistence context serves as a cache of retrieved entity objects. If a requested ... is then added to the persistence context as a managed entity object and returned to the application ... of entity classes and to keep them simple as possible. Retrieval by Class and Primary Key Every entity
Forum
6

Performance problem

Hi, we have a strange performance problem with ObjectDB 2.5.3_01 and JBoss 7.1.1 ... one running JBOSS and other running ObjectDB. - CPU utilization of JBOSS server is max 5-10% (per core) - CPU utilization of JBOSS server is 80-150% (this is per core) Now is the interesting
Manual
6

JPA Entity Fields

are always considered to be transient. Other fields can be declared explicitly as transient using ... store methods or code. Only the persistent state of the entity object, as reflected by its persistent ... static type, including a generic java.lang.Object, as long as the type of the actual value at runtime
Manual
6

GROUP BY and HAVING clauses

to grouping by the GROUP BY clauses before arriving at the SELECT clause. GROUP BY as DISTINCT ... which returns the first letters as result. ObjectDB is very flexible in allowing JPQL expressions anywhere in ... all the JPA implementations. Grouping the Country objects makes them inaccessible to the SELECT clause as