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ObjectDB Object Database Features

) in annotations (@NamedQuery) and XML. Query parameters for efficient reuse of one query in multiple

Date and Time in JPQL and Criteria Queries

Date and time expressions may appear in JPQL queries: as date and time literals - e.g. {d '2011-12-31'}, {t '23:59:59'}. as parameters - when date and time values are assigned as arguments. as path expressions - in navigation to persistent date and time fields. as results of predefined JPQL current

Database Management Settings

connection parameter. The <activation> elements <activation code="XXXX-XXXX-XXXX-XXXX-XXXX

JPA Named Queries

A named query is a statically defined query with a predefined unchangeable query string. Using named queries instead of dynamic queries may improve code organization by separating the JPQL query strings from the Java code. It also enforces the use of query parameters rather than embedding literals

JPA Query Expressions (JPQL / Criteria)

/ Criteria Variables JPQL / Criteria Parameters JPQL / Criteria Literals Every query expression consists

Step 4: Create an ObjectDB Data Set

window appears. In the Parameters list specify default values for low (11) and high (20


. Parameters: categoryName - Returns: the FetchGroup Throws: JDOUserException - if the FetchGroup ... this FetchGroup. Parameters: memberName - the name of a member to add to the FetchGroup Returns: the FetchGroup Throws: JDOUserException - if the parameter is not a member of the persistent type


with the specified detail message. Parameters: msg - the detail message. Since: JDO 1.0 JDOException ... object. Constructs a new JDOException with the specified detail message and failed object. Parameters ... . Constructs a new JDOException with the specified detail message and nested Throwable. Parameters: msg


Method javax.jdo.PersistenceManager T makePersistent( T pc ) Make the parameter instance persistent ... instances in the closure of the parameter instances are modified to refer to the corresponding persistent ... on parameter persistent instances already managed by this PersistenceManager. They will throw

[ODB1] Chapter 9 - ObjectDB Explorer

of the query. Optional JDOQL components, such as filter, parameters, variables, ordering and imports (chapter

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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