ObjectDB Database Search

Hi! Is there a way to NOT prefer NULL in Order BY ? I.e. assume this: @Entity class Hint {   ... do something like SELECT FROM Test ORDER BY hint.name It orders ASC like this (assuming I've got ... supported. null values are smaller than any other value so they appear first in ordering

  The sql that works is ORDER BY CAST(SUBSTR(username FROM 4) AS UNSIGNED) ASC Using JPQL SELECT u FROM Users u ORDER BY SUBSTRING(u.username,4)*1 ASC If you have other alternative for JPA ... Hi Anyone could help me I need to order a string  for example user1, user2, ..., user1000 I

specify they locale as part of the index definition or the ORDER BY clause, so the sort uses ... (we are Czech company). How the sort order works for international (for us 'czech') letters? Does the ordering respects the national requirements? Thank you for clarification ... dmarko David Marko

that can be referenced by ID, and meets a uniform and powerful IElement interface. - The BooleanValue is doing a heap ... to do it this way; but the wrapped boolean value is not the whole story.   webel Dr Darren Kelly By JVM ... -Djava.compiler=NONE webel Dr Darren Kelly OK. It could still be an optimization that is used by the JVM

Hi! Sorry for my bad english skills. When I execute fulfilOrder, only Order entity is updated in ... ; @PersistenceContext(unitName = "SMShop") private EntityManager shopdb; ... public Order fulfilOrder(Long orderID, Long userID, int itemID) { Order order = shopdb.find( Order .class, orderID); if ( order == null) { User

, of type ECompoundKeyMapItem, identified by their "key" within the EContainer class. The items ... "ECompoundKeyMapSubItem", identified by their keys. The embeddedId for the item class, ECompoundKeyMapItemId ... ] Unexpected exception (Error 990) Generated by Java HotSpot(TM) Client VM 1.6.0_27 (on Windows Server 2008 6.0

with this issue. Query: select hour(ov.created), count(ov) from ObjectView ov group by hour(ov.created) order by ... have to group by date(). For few queries I was concatenating 'date' from year()-month()-day() calls ... with new version. When you group by date() there are two days per day. I mean group by divides each day

and fixed (in build 2.6.1_01) a bug in cascading detach through mapped by to-many relationships ... the issue in order to explore it further. support Support Thanks, no exception now

("query", "%myQuery%"); I don't get any error! The order of the WHERE clauses obviously makes

and sometimes we don't get the entity by query. Have you an idea what happens here?   btc_es BTC EmbeddedSystems

would have expected the alias to be used in the ORDER BY clause, something like SELECT $1, UPPER($1.someStringProperty) AS TEST FROM T ORDER BY TEST However what I actually get as query string is SELECT $1, UPPER($1.someStringProperty) AS TEST FROM T ORDER BY UPPER($1.someStringProperty) This doesn't

of entity classes and to keep them as simple as possible. Retrieval by Class and Primary Key Every entity object can be uniquely identified and retrieved by the combination of its class and its primary key ... method except that if the entity object is not already managed by the EntityManager a hollow object

the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright ... and all other entities that control, are controlled by , or are under common control with that entity

the Service. By using the Service, You agree to the collection and use of information in accordance ... files that are placed on Your computer, mobile device or any other device by a website, containing ... individuals employed by the Company to facilitate the Service, to provide the Service on behalf

will affect the way strings are sorted in queries (with ORDER BY ). Currently strings are always ordered by Unicode order , and a workaround that enables controlling the order is to use normalizing, as ... feature. Many CRMs, DMS and other systems requires correct collation when using order by clause.  +1 for this ... dmarko David Marko

are represented in queries by entity names . By default, the entity name is the unqualified name ... can be set explicitly by using the name attribute of the Entity annotation: @Entity ( name ="MyName ... superclasses are treated by ObjectDB as ordinary entity classes. Mapped superclasses are really

Since: JPA 2.0 Order asc ( Expression  expression) Create an ordering by the ascending value ...  nullPrecedence) Create an ordering by the ascending value of the expression. Parameters ... an ordering by the descending value of the expression. Parameters: expression - expression used to define

New entity objects can be stored in the database either explicitly by invoking the persist method ... is committed. An IllegalArgumentException is thrown by persist if the argument is not an instance of an entity ... is thrown. The exception is thrown either by persist (if that existing entity object is currently

Detached entity objects are objects in a special state in which they are not managed by any ... ). Retrieval by navigation from detached objects is not supported, so only persistent fields ... EntityManager . In addition, in JPA 2 we can detach an entity object by using the detach method: em. detach

of these documentation pages is to serve as a reference. In order to learn how to use JPA and ObjectDB please read the ObjectDB manual .

Hello, we opened a transaction, load an entity from database and removed this entity by em.remove(). Afterwards the entity can be load again by query although the resulted entity have an attribute ... explanation on the change in build 2.7.4_04: ObjectDB uses snapshots in order to isolate transactions, i.e

A connection to a database is represented by an EntityManager instance, which also provides ... . An EntityManagerFactory is constructed for a specific database, and by managing resources efficiently (e.g ... the content of a database require active transactions. Transactions are managed by an EntityTransaction

its own notation (which is also in use by JDOQL, the JDO Query Language). ObjectDB supports both forms ... by these operators. Comparing NULL values The following table shows how NULL values are handled by ... IS NULL and IS NOT NULL operators which are provided by JPQL (and SQL): c.president IS NULL c.president

ObjectDB ignores lazy setting of non collection mapped by (inverse) fields and loads them always eagerly. This is allowed by JPA since lazy is only hint but it is not efficient. The reason ... immediately, at least as hollow objects. In order to instantiate referenced objects their exact type

Please read carefully this software license agreement. By downloading, installing or using ... of this agreement will be binding, unless in writing and signed by an authorized representative of each party. 1 ... by this agreement. 3. The free edition of the Software includes restrictions on the number of classes

are provided in the Storing Entities section. Entity objects retrieved from the database by ... is detected by the owning EntityManager and the update is propagated to the database on transaction ... (except retrieval by refresh , which always requires accessing the database). The main role of the persistence

, the following query returns Country objects that become managed by the EntityManager em : TypedQuery query ... in the results directly, but their content can be added to the SELECT clause by using a bound JOIN ... that are retrieved directly by a result path expression are not associated with an EntityManager and changes

literals (e.g. 077 , 077L ), a feature that is not currently supported by all JPA implementations. String ... single quotes (e.g. 'Adam' , '' ) and a single quote character in a string is represented by ... can be used (e.g. "Adam\'s" , "abcd\n1234" ) but this is not supported by all the JPA implementations

1. Terms By accessing and using this web site, you agree to be bound by these web site Terms ... from using or accessing this site. The materials contained in this web site are protected by ... of these restrictions and may be terminated by ObjectDB Software at any time. Upon terminating your viewing

element is not specified for an entity association, ordering by the primary key of the associated ... , the ordering is by value of the basic objects and the property or field name is not used ... is not specified, ordering by the primary key of the associated entity is assumed. Since: JPA 1.0

for ordering that is visible as persistent state and maintained by the application. The OrderBy annotation ... a column that is used to maintain the persistent order of a list. The persistence provider is responsible for maintaining the order upon retrieval and in the database. The persistence provider

is optional when using ObjectDB, but required by JPA. persistence.xml Persistence units are defined in ... A persistence unit is defined by a persistence-unit XML element. The required name attribute ( “my-pu ... should be used. ObjectDB is represented by the com.objectdb.jpa.Provider string. If not specified, the first JPA

JPA exceptions are represented by a hierarchy of unchecked exceptions: java.lang.Object java.lang ... are represented directly by the PersistenceException class. Some specific errors are represented by ... transaction is represented by : Database update failures that require transaction rollback are represented by

can be executed. The resultClass arguments must be specified in the order in which the result sets is returned by ... arguments must be specified in the order in which the result sets is returned by the stored procedure ... closed via a call to () , to allow resources to be cleaned up by the persistence provider

. Recording is enabled by default and can be disabled in the configuration . The ObjectDB Replayer tool ... is useful for two different purposes: It enables recovery from a database failure by replaying the recorded operations. It enables reproducing problems during debugging by repeating a failure. Backup

Metamodel API is Metamodel . It can be obtained either by the EntityManagerFactory 's getMetamodel method or by the EntityManager 's getMetamodel method (both methods are equivalent). For example, given an EntityManager , em , a Metamodel instance can be obtained by : Metamodel metamodel = em

language. For step by step instructions on using BIRT with ObjectDB see the  Report Generation ... Developers extension. To install it: Open the [Install] dialog box by selecting Help Install New Software ... and press ENTER. Select the ObjectDB Birt/ODA feature. Complete the installation by clicking Next twice

variables are represented in criteria queries by descendant interfaces of the From interface: Range variables (bound by an entity class) are represented by the Root subinterface: Join variables (bound by an attribute of a preceding variable in the FROM clause) are represented by the Join subinterface

, if an ObjectDB database is accessed directly only by a web application, it should be embedded in ... configuration is loaded automatically as explained in chapter 6 . This can be overridden by specifying ... the Server Configuration , but can be overridden by an explicit command line option: $ java com.objectdb

are handled. ObjectDB can manage non enhanced classes by using reflection at the cost of performance ... entities are always held by strong references in the persistence context (until commit or flush ... that is managed by the EntityManagerFactory and shared by all its EntityManager instances. The level 2 cache

An ObjectDB database can be backed up by simply copying or archiving the database file while the database is offline (i.e. when it is not open in an ObjectDB server and not in use by any application ... . Starting Online Backup The online backup can be started by executing a special query on an EntityManager

a limit size that is specified by the threshold attribute. The mb and kb suffixes represent megabytes ... has to be specified for ObjectDB to avoid using sockets that are expired by the firewall. The element    ObjectDB manages a list of the recently accessed database URLs for use by the Explorer

to the order of the where clouse and the 2.7.4 wasn't. Unfortunatly I was not able to strip ... to the order of the where clause, meaning that the result set differs. As far as I understand there might be some performence issues related to the order but no different result set

As demonstrated in this forum thread , a mapped by collection field with lazy fetch mode is not initialized in results of a query that uses JOIN FETCH on that collection field (when enhancement is used). support Support   Build 2.4.1_06 fixes this issue (fields are now initialized

have been defined by the stored procedure. When getResultList and getSingleResult are called ... , the provider will call execute on an unexecuted stored procedure query, followed by getUpdateCount ... , if any. If the execute method returns true, the pending result set can be obtained by calling

is affected also by other elements in the configuration file, particularly the and the configuration elements ... . If another port is specified it also has to be specified by clients in the URL connection string ... specifies the maximum number of simultaneous connections that are accepted by the server. A request

This tutorial demonstrates how to create reports based on data in an ObjectDB database using the popular open source Business Intelligence and Reporting Tools (BIRT). In order to keep things as simple as possible - we will use the basic  points.odb ObjectDB database file from the Getting

In this step we will add code to the Main class (that was generated with the project) in order to store Point objects in the database and then retrieve them from the database. Use copy and paste to replace the content of the Main class with the following content: package tutorial; import javax

We start by installing the BIRT development environment and the ObjectDB data source driver ... IDE for Java EE Developers. Update your existing Eclipse IDE for Java EE Developers environment by ... an existing  Eclipse IDE for Java EE Developers environment: Open the [Install] dialog box by

The Guest entity objects will be stored in an ObjectDB database, which will be represented by ... created if not existing yet) when the web application starts, by instantiating an EntityManagerFactory . The database will be closed when the web application stops (or when the web server shuts down), by