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SELECT clause (JPQL / Criteria API)

with the containing entities. Therefore, embedded objects that are retrieved directly by a result path expression ... results: SELECT c.name, c.capital.name FROM Country AS c The result list of this query contains ... cell contains the country name (c.name) and the second array cell contains the capital city name (c

Collections in JPQL and Criteria Queries

is contained in a specified persistent collection field. For example: 'English' MEMBER OF c.languages is TRUE if languages contains 'English' and FALSE if not. 'English' NOT MEMBER OF c.languages is TRUE if languages does not contain 'English'. [NOT] IN The [NOT] IN operator provides an additional

Schema Update

. The default configuration file contains an empty <schema> element. If the <schema> element is not empty ... serves as a container of <class> subelements for renaming classes and fields in that package ... ) because the package name is already specified in the containing <package> element. The value of the new

Server User List

configuration file contains the following <users> element: <users> <user username="admin" password="admin ... > Every <user> element may contain one or more <dir> subelements indicating which paths ... separated string value may contain the following permissions: access - permission to open a database

Storing JPA Entity Objects

of other persistable types can only be stored in the database embedded in containing entities (as ... already contains another entity of the same type with the same primary key, an EntityExistsException ... embedded in containing entity objects. Therefore, if Address is defined as an embeddable class

GROUP BY and HAVING clauses

cell contains the initial letter as a String object, the second cell contains the number of countries in that letter's group as a Long object and the third cell contains the distinct number ... that contains an aggregate expression in the SELECT clause is considered a grouping query

Database Explorer

. Running the Explorer The ObjectDB Explorer is contained in the explorer.jar executable jar file ... , which can be opened using the Tools > Options... menu command. The [Options] dialog box contains three tabbed pages: [General], [Fonts] and [Views]. The [General] Page The [General] page contains

Privacy Policy

on Your computer, mobile device or any other device by a website, containing the details ... may contain small electronic files known as web beacons (also referred to as clear gifs, pixel tags ... to Other Websites Our Service may contain links to other websites that are not operated by

[ODB1] Chapter 8 - ObjectDB Server

, packaged in the odbse.jar file. The jar file contains the entire ObjectDB implementation including ... the data directory containing all the database files that the server is allowed to access and manage ... containing his or her private database files (as demonstrated in section 8.3). The <permissions

[ODB1] Chapter 4 - JDO Metadata

A JDO metadata file is an XML file with a '.jdo' suffix, containing information about one or ... > A single persistent class, test.A, is declared by a <class> element containing <field> sub elements ... , the group contains all the fields with primitive types (e.g. int), types defined in java.lang (e.g

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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