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Catching exceptions from online backup

}); // Wait until the backup is completed. try {     backupThread.join(); } catch (InterruptedException e ... .join(); support Support I tested the improvement and the delayed starting is working ... . It would suggest moving the throw new InternalException(var4); to the finally block instead of the inner

No clue how to query with collection

null). So I want something like this: SELECT c, a FROM Customer INNER JOIN c.addresses ORDER BY ... , a FROM Customer INNER JOIN c.addresses a ORDER BY a.street WHERE a.active = true I have the problem ... Adam Maybe something like: SELECT c, a FROM Customer LEFT JOIN c.addresses a WHERE a IS NULL OR

slow performance for a complex query

of Organisation. The inner loop is executed about 100M times. In cases with complex AND/OR structures like this, sometimes JOIN can only be implemented by nested full scan (and indexes cannot help). There are different types of nested queries. Some nested queries are actually equivalent to JOIN. When the inner

Online Backup

);     Thread backupThread = backupQuery.getSingleResult();     backupThread.join(); // Wait

JPA Criteria API Queries

). FROM clause (from, join, fetch). WHERE clause (where). GROUP BY / HAVING clauses (groupBy, having

[ObjectDB 2.5.5_03] Unexpected exception (Error 990)

FROM Unit t INNER JOIN t.lastGeocodedPosition l WHERE l IS NULL OR l.receiveTime < :last ... UNKNOWN, Accessing an entity is a different story because it implicitly defines an INNER JOIN, i.e ... LEFT OUTER JOIN t.lastGeocodedPosition l WHERE l.receiveTime < :last See also this paragraph in


get methods) Specifies a primary key column that is used as a foreign key to join to another table. It is used to join the primary table of an entity subclass in the JOINED mapping strategy to the primary table of its superclass; it is used within a SecondaryTable annotation to join a secondary table


the mapping of associations. It is specified on the owning side of an association. A join table ... -to-one relationships, and one-to-one associations (both bidirectional and unidirectional). When a join table ... of the join table is assumed to be the table names of the associated primary tables concatenated


, the joinColumns element is used. If the relationship mapping uses a join table, the joinTable element must be specified to override the mapping of the join table and/or its join columns. Example 1: Overriding ... See Also: Embedded Embeddable MappedSuperclass AttributeOverride JoinColumn[] joinColumns The join


column. The table in which it is found depends upon the context. If the join is for a OneToOne or ... of the source entity or embeddable. If the join is for a unidirectional OneToMany mapping using a foreign key mapping strategy, the foreign key is in the table of the target entity. If the join

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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