61 | Cache configuration of database file pages, query programs, query resultsAre 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 |
56 | 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 |
54 | IN expression in a Criteria Query, it is written that ObjectDB is 100% compatible with JPA. However, I have problem with this JPQL query ... .employeeEntity = e) ORDER BY e.name with Hibernate, there was no problem with this query, but ObjectDB throws exception: com.objectdb.o.UserException: Unexpected query token 'EXISTS' Second problem |
11 | Logical Operators in JPQL and Criteria APILogical operators in JPQL and in JPA criteria queries enable composition of complex JPQL boolean ... , the JDO Query Language). ObjectDB supports both forms. Binary AND (&&) Operator The following query ... The following query retrieves countries whose population or area exceeds a specified limit: SELECT c FROM |
11 | Comparison in JPQL and Criteria APIMost JPQL queries use at least one comparison operator in their WHERE clause. Comparison Operators ... , the JDO Query Language). ObjectDB supports both forms. Besides the different notation ... can be compared by using any comparison operator. Equality operators (=, <>, ==, !=) on strings in queries |
11 | 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 |
11 | 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 |
11 | javax.persistence.criteria.Subquery a subquery root correlated to a root of the enclosing query. Create a subquery root correlated to a root of the enclosing query. Parameters: parentRoot - a root of the containing query Returns: subquery ... correlated to a join object of the enclosing query. Create a subquery join object correlated to a join object |
1 | [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 |
1 | 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 |
