ObjectDB ObjectDB

Internal Website Search

31-40 of 200 resultsRefresh

Update is ignored by ObjectDB

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

Collation and String Order

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 discussed ... feature. Many CRMs, DMS and other systems requires correct collation when using order by clause. +1 for this ... dmarko David Marko

Database Management Settings

. The resize attribute specifies the size by which to extend the database file when additional space is needed. Small initial size and resize values save space. Larger values can improve performance by ... ="128mb" /> When enabled, a recovery file is created by ObjectDB when a database is opened and deleted

JPA Entity Fields

, the order of the retrieved owner entities can be set by the OrderBy annotation: @Entity public class ... FROM Employee e WHERE e.department = :d ORDER BY e.name The specified field ("name ... (Mapped By) fields Primary key (ID) fields Version field The first three groups (transient, persistent

JPA Primary Key

are physically stored in the database ordered by their primary key. Sometimes it is useful to choose ... the database is uniquely identified (and can be retrieved from the database) by the combination of its type ... have their own separate identity. Automatic Primary Key By default, the primary key is a sequential

JPA Lifecycle Events

and are invoked automatically by JPA when these events occur. Internal Callback Methods Internal callback ... - when an entity is identified as modified by the EntityManager. @PostUpdate - after updating an entity in ... events by marking it with more than one annotation. By default, a callback method in a super entity

Eclipse Public License - v 1.0

additions to the Program originate from and are distributed by that particular Contributor. A Contribution 'originates' from a Contributor if it was added to the Program by such Contributor itself or ... entity that distributes the Program. "Licensed Patents" mean patent claims licensable by

ObjectDB Object Database Features

expressions). GROUP BY (including HAVING and aggregates). ORDER BY (including ASC, DESC). Aggregates ... Databases are also supported by ObjectDB. The combination of Object Database features ... only by operating system resources). Unlimited CPUs and cores. Reliability and Stability Recovery

Query Parameters in JPA

) The following method retrieves a Country object from the database by its name: public Country ... method. The setParameter method supports method chaining (by returning the same TypedQuery instance ... . Named parameters can be easily identified in a query string by their special form, which is a colon

[ODB1] Chapter 5 - JDO Connections

that every connection consumes. Database connections are managed in JDO by the javax.jdo ... is transparent. The functionality of PersistenceManager instances returned by the getPersistenceManager ... Properties can also be specified in a file, as demonstrated by the following properties file: javax.jdo

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.

Need Help?

  1. Search ObjectDB website
  2. Read the FAQ
  3. Follow the Tutorials
  4. View or post in the forum
  5. Search or file an issue
  6. Contact support