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. com.objectdb.o.UserException - Attempt to execute a query using a closed EntityManager at com ... and executes the following. 3. First statement: @Stateless ClientC.create(and passes the user) 4 ... to execute a query using a closed EntityManager at org.apache.myfaces.view.facelets.el

, and there is only on Entity in the database. Execution of this query (running with ObjectDB) takes about 10-12 seconds. If i remove ANY 5 left joins, query execution time drops to about 50 milliseconds. Adding a new left join on remaining 8 slows down query execution time drastically. Please help

I have facing a problem when i am executing the query first time, Please find the stack trace ... .objectdb.jdo.JdoQuery. execute (JdoQuery.java:720) I am using the following code to execute the same Query ... ()); Collection collection = (Collection)query. execute (); query. execute () is throwing the exception Any

Hello, we want to execute querys in parallel threads on the same entity type in order to increase ... are fine. A parallel query execution doesn't necessarily improve performance, if the serial execution ... a single query? Not every query can benefit from parallel execution . Regarding the profiling data

The test case of the java file attachment persists many entities and executes a query after every persist. The execution time amounts 2 sec when the test persists 1000 entities. The execution time ... more time (i.e. every query execution requires a more expensive flush). Results of your test

JPA Method in javax.persistence.StoredProcedureQuery boolean execute () Return true if the first ... set Throws: QueryTimeoutException - if the query execution exceeds the query timeout value set and only the statement is rolled back PersistenceException - if the query execution exceeds the query

that may affect query execution if invoked before a query is run using getResultList or getSingleResult ... operations, such as find . However, query execution is much more complex. Therefore, before a query is executed , uncommitted database changes (if any) have to be flushed to the database in order

to view data in ObjectDB databases, execute JPQL and JDOQL queries and edit the content of databases. Running the Explorer The ObjectDB Explorer is contained in the explorer.jar executable jar file ... command switches the current viewer to focus on the selected object. Executing Queries The [Query

Hi, Is is possible in any way to get string representation of a query right before execution , after setting parameters? Of course it's easy to print out query string when we build it by concatenating many strings, but even then we miss attributes. lwalkowski Lukasz Walkowski

.invoke(Method.java:606) at org.eclipse.e4.core.internal.di.MethodRequestor. execute (MethodRequestor.java

We get an internal objectdb error, when we execute a flush. Why? What's wrong? It performs with version objectdb-2.6.4_04. It does not perform with version objectdb-2.6.6_04.   Caused by: com.objectdb.o.InternalException: Unexpected internal exception at com.objectdb.o.JPE.h(JPE.java:168

variables forming nested loops (outer and inner) might prevent query execution within a reasonable response time. Database Management Systems (DBMS), including ObjectDB, try to optimize the execution ... is avoided. The above query, for example, can be executed as follows. An outer loop iterates with c1

: Query.executeUpdate - for running only DELETE and UPDATE queries. Ordinary Query Execution ... Country instances would be more efficient. Single Result Query Execution (with getSingleResult ... after query execution (e.g. by results.get(0) ). To eliminate this routine operation JPA provides

Query parameters enable the definition of reusable queries. Such queries can be executed ... execution , because it eliminates the need for repeated query compilations. Named Parameters (:name ... can be executed a parameter value has to be set using the setParameter method. The setParameter

, which represents results as arrays. The following code demonstrates the execution of the query and iteration ... , which represents Tuple results. The following code demonstrates the execution of the query and iteration ... defined class ( CountryAndCapital in the above example). The following code demonstrates the execution

the database, but when executed , delete specified entity objects from the database. Removing entity objects ... with any operation that modifies the database, DELETE queries can only be executed ... can be used to delete all the objects in the database: DELETE FROM Object DELETE queries are executed using

, but when executed , update the content of specified entity objects in the database. Updating entity objects in ... operation that modifies the database, UPDATE queries can only be executed within an active ... . For example: UPDATE Country SET population = 0, area = 0 UPDATE queries are executed using the 

. Starting Online Backup The online backup can be started by executing a special query on an EntityManager ... directory can be specified by setting the target parameter before executing the backup query:   ... Executing the backup query starts the backup asynchronously. Therefore, the backup query

to accelerate the execution of relevant queries. The element The element specifies settings ... still have to be executed , so cached programs are less efficient than cached results. However, cached query

. But even with an index, executing a query for loading a field is relatively slow. Therefore, if the employees ... than an inverse collection or map field because no proxy class is used and the inverse query is executed

that are evaluated to the date and time on the database server when the query is executed : CURRENT_DATE ... on every query execution to reflect the date and time when the query is run. Functions for extracting date

indexes the iteration can be avoided and complex queries over millions of objects can be executed quickly ... of how ObjectDB uses indexes to accelerate query execution . Indexes are especially efficient in lookup

the execution time of object oriented applications significantly. For instance, collection and map ... convert these queries to SQL and then transition the SQL to the DBMS for execution through a JDBC

side: Cache of database file pages . Cache of query programs . Cache of query execution results ... can also be overridden for a specific retrieval operation: // Before executing a query:   query. setHint

work, at least for simple static queries, since the equivalent JPQL query could simply be executed ... are represented by a TypedQuery instance - query execution  and query setting  is similar

the terms of any separate license agreement you may have executed with Licensor regarding

, which specifies by its name the last executed transaction. The Replayer can also be run

with millions of objects in the database there is a huge difference in query execution time if proper

and execute queries in JPA: In addition, the syntax of the JPA Query Language (JPQL) is described in:

for Query instances, which are needed for executing queries on the database. Every JPA implementation

a variable to the FROM clause (representing iteration during query execution ). The constructed variable

parameters for efficient reuse of one query in multiple executions . Result range settings (first

The GROUP BY clause enables grouping of query results. A JPQL query with a GROUP BY clause returns properties of generated groups instead of individual objects and fields. The position of a GROUP BY clause in the query execution order is after the FROM and WHERE clauses, but before the SELECT

ORDER BY c.name When an ORDER BY clause exists it is the last to be executed . First the FROM clause

, when a required entity object is not found: or during query execution : The lock exceptions

ObjectDB 2.8.7.b08 Our entities are not enhanced and we execute a query "select max(uid) from ModelElementImpl". In the objectdb.conf the reflection is set to error. ...   We got following exception after execution of the query: Caused by: com.objectdb.o.UserException: Unexpected query token

')).contracts.active=true)))) results in "Query Execution Error===null" in Explorer and Internal Exception

was mistakenly executed on a test machine without ObjectDB lizense. At the beginning of the test

execution . Please post the query (and also try it with build 09). support Support Most simple query

result = (Collection)query. execute (); Queries are represented by the javax.jdo.Query interface. A Query ... . The execute () method compiles and runs the query. If there is no age field in class Person or ... ), iteration over the objects in the database would not be required, and the query would execute

to browse databases, execute JDOQL queries, create new databases and edit the content of existing ... . It is shipped as an executable jar that will run on any system with a Java 1.3 JRE or later installed ... on those respective operating systems are also provided. Running the Executable JAR directly The Explorer

JDO Method in javax.jdo.Query Object execute (   Object p1,    Object p2,    Object p3 ) Execute the query and return the filtered Collection . Parameters: p1 - the value of the first parameter declared. p2 - the value of the second parameter

JDO Method in javax.jdo.Query Object execute (   Object p1,    Object p2 ) Execute the query and return the filtered Collection . Parameters: p1 - the value of the first parameter declared. p2 - the value of the second parameter declared. Return: the filtered

JDO Method in javax.jdo.Query Object execute () Execute the query and return the filtered Collection. Return: the filtered Collection . See Also: executeWithArray (Object[] parameters) Since: JDO 1.0

JDO Method in javax.jdo.Query Object execute (   Object p1 ) Execute the query and return the filtered Collection . Parameters: p1 - the value of the first parameter declared. Return: the filtered Collection . See Also: executeWithArray (Object[] parameters) Since: JDO 1.0

You can run the application now by right clicking the  GuestServlet node (in the [Projects] window), selecting  Run File , and then clicking  OK (no need to change the servlet execution URI). Since we are using ObjectDB in embedded mode - the database file is created

You can run the application now by right clicking the GuestServlet node (in the [Projects] window), selecting Run File , and then clicking  OK (no need to change the servlet execution URI). Since we are using ObjectDB in embedded mode - the database file is created under the Tomcat directory

to delete, embedded objects are usually more efficient in terms of execution time and database ... the Java memory garbage collector, execution of the database garbage collector requires an explicit

over persistent instances of a class (including or excluding instances of subclasses) as well as execution ... can be avoided, and complex queries over millions of objects can be executed quickly. Index management

during the execution of deletePersistent( ... ) , just before an object is deleted. A possible action is to delete