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149

Navigation to Collection Elements

object of class X. Can I navigate (as opposed to using JOIN) to individual elements (in JPA & JDO ... , you can navigate from any managed entity object to any other reachable managed entity object ... . How about arrays like x.array[1] and x.array[1][2] ? If such navigations in queries lead to performance
146

Navigation and Parameters

Greetings ObjectDB team, Suppose I pass a List of persistent objects to some query as a parameter, can I navigate to those objects' fields ? E.g.: SELECT x FROM ClassX x WHERE x.a IS MEMBER OF :y.b Thank You ! geekox86 Mohannad AlAwad You cannot navigate from a collection of objects to a field in
143

Navigation through Path to evaluate collection

Hello, I need to evaluate a field ("identifier") which is situated in a collection, within an entity. As stated in the documentation it is not possible to navigate there with the dot operator since its a collection. Is it there a way to evaluate this field? Here is the query, the entity
143

Pre-detach loading: retrieval by navigation not working in if statement

-why-retrieval-by-navigation-and-access webel Dr Darren Kelly It could be some sort of JVM optimization
84

Paths and Types in JPQL and Criteria API

as arguments. Path expressions that navigate from one object to another. Instances of user defined ... . But more often they are used in JPQL path expressions that navigate to values of simple types (number, boolean ... , and they can be used in ordering. Navigation through Path Expressions A path expression always starts
50

Database Explorer

navigation. Because every reference between two database objects is represented by a parent-child relationship in the tree, you can navigate among objects by expanding nodes in the tree, similar to exploring
44

Detached Entity Objects

). Retrieval by navigation from detached objects is not supported, so only persistent fields
29

Navigation through lazy loading from Detached Objects

A main limitation of detached objects (as explained on the Detached Entities manual page) is: Retrieval by navigation from detached objects is not supported, so only persistent fields ... for that) but for us the inability to navigate lazy relationships of detached entities is a big showstopper, as we rely
27

ObjectDB Object Database Features

are retrieved from the database automatically by navigating from other managed objects. Transparent ... Expressions Path navigation expressions using the dot (.) operator. Comparison operators ... . Tree view for navigating between entity objects. Database Server Available as Windows EXE and Unix
3

[ODB1] Chapter 9 - ObjectDB Explorer

database objects visually, navigate among them and execute queries is very valuable during development ... the browser window is in navigation among objects. Because every reference between two database objects is represented by a parent-child relationship in the tree, you can navigate among objects by expanding

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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