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JPA Persistable Types

. In addition, only instances of entity classes preserve identity and are stored ... and keys and values in maps) are either null values or instances of persistable types. In addition

FROM clause (JPQL / Criteria API)

an additional type of identification variable, a join variable, which represent a more limited ... to have a single range variable that serves as a root and additional join variables that are bound to path

Schema Update

to the new package name. In addition, whether or not a new-name attribute is specified, a <package> element ... is specified in the <package> element the name value of the <package> element is used. In addition

JPA Annotations for Fields

The way a field of a persistable class is managed by JPA can be set by the following annotations: Additional annotations (and enum) are designated for enum fields: Other additional annotations (and enum) are designated for date and calendar fields: Chapter 2 of the ObjectDB manual explains how to use all the above annotations.

JPA Query Expressions (JPQL / Criteria)

: * (multiplication), / (division), + (addition) and - (subtraction). Comparison operators ... ] MEMBER [OF] and the [NOT] LIKE operator. Logical operators: AND, OR, NOT. In addition, JPA queries

Numbers in JPQL and Criteria Queries

: + (addition), - (subtraction), * (multiplication) and / (division). ObjectDB also supports the % (modulo ... = cb.parameter(Integer.class); // Addition (+) Expression<Integer> sum1 = cb.sum(path, param

ObjectDB License

have been purchased) does not require additional separate licenses. Purchase a Server License Site ... addition also covers installation of ObjectDB on: Home computers and laptops of employees in

Defining a JPA Entity Class

is an ordinary Java class. The only unique JPA addition is the @Entity annotation, which marks the class as ... object is persisted. Chapter 2 provides additional information on how to define entity classes

[ODB1] Chapter 1 - About ObjectDB

, records and SQL in addition to the application's classes and objects. ObjectDB is JDO Compliant ... and Microsoft SQL Server. In addition, by using JDO you are backed up by a large community that's expanding ... , but has some additional restrictions and limitations. This developer's guide is for all ObjectDB

[ODB1] Chapter 8 - ObjectDB Server

An ObjectDB server can manage one or more databases. Databases that are managed by a server can be accessed by multiple processes simultaneously. In addition, the server supports accessing ... the Explorer). Additional permissions are granted using the <permissions> sub element

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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