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Criteria query error: Unexpected query token

.arquillian.spi.ArquillianProxyException: com.objectdb.o._PersistenceException : Unexpected query token ... It seems that the query is invalid because a SELECT is not specified. Unexpected query token 'FROM' (SELECT is expected) A query with no SELECT may be valid in Hibernate HQL but not in JPQL and JPA Criteria

ObjectDB Explorer query error: Unexpected query token 'value'

Hi, my entity is named "XXXValue": this has several attributes, one of these is "value". In query tab, if I do "select value from XXXValue", I get the error <Unexpected query token 'value'>. I try "select XXXValue.value from XXXValue" and the error is the same. Queries on others attributes work

Querys slower when execute a query after every persist

The test case of the java file attachment persists many entities and executes a query ... requires only 20 sec, but the test requires 100 sec. Why the querys will be more and more slower? In ... (i.e. every query execution requires a more expensive flush). Results of your test with enhanced

Cache configuration of database file pages, query programs, query results

Are there some possibilities to configure following caches in order to keep cache data for only some important entity types and for the entire life cycle of the EntityManagerFactory. Cache of database file pages. Cache of query programs. Cache of query execution results. btc_es BTC EmbeddedSystems

Query problem after transaction commit

to it. The client program can connect to the server and query to get all the records. However, after transaction ... _Connection: connecting 02> Test_Connection: connected 03> UI: start query [query for all object Goods ... = % 06> UI: end query 07> UI: start printing result 08> code= A, desc= Good A, byUser= test 09> code

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 is created ... query:     Query backupQuery = em.createQuery("objectdb backup");     backupQuery.setParameter

queries more than 10 times slower using 2.8.1 versus 2.7.6

not do any statistics generate, just tried to use the new version - our reference query that takes ... . It seems that running your query on your sample database with version 2.8.1 is slower if statistics is not ... more performance lose with this query, there is a good chance that the same applies to your newer database

queries under 2.7.6_4 significantly slower than under 2.7.6

indicating deep query plan checks and an overall significant performance loss in all queries ... since version 2.7.6 that could possibly effect query execution. Could you please explain or post some of these logs that show deep query plan checks (and are new in 2.7.6_04)? In addition

[ODB1] Chapter 4 - JDO Metadata

of a class (including or excluding instances of subclasses) as well as execution of queries ... are not included in the extents of their classes, so they cannot be queried directly ... only in index declarations, as explained in the next section. 4.5 Index Definition Querying a large


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

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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