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Manual
93

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
Manual
59

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
Manual
52

Detached Entity Objects

). Retrieval by navigation from detached objects is not supported, so only persistent fields
Forum
27

Navigation to Collection Elements

 object of class X. Can I navigate (as opposed to using JOIN) to individual elements (in JPA & JDO ... How about arrays like x.array[1] and x.array[1][2] ? Thanks & Best Regards Yes, you can navigate from ... ] ? If such navigations in queries lead to performance penalty, how slow is it and would you recommend
Manual
26

JPA Entity Fields

the database, but is still available after retrieval by a special automatic query. Note: Navigation through inverse fields is much less efficient than navigation through ordinary persistent fields ... , and maintaining two unidirectional relationships is usually much more efficient (unless navigation
Manual
26

Retrieving JPA Entity Objects

). Therefore, when an entity object is retrieved, all the entity objects that are reachable from it by navigation ... all the referenced Project instances are also retrieved automatically. Retrieval by Navigation ... is available for navigation, regardless of the fetch policy. The fetch policy, however, does affect
Result
26

ObjectDB Object Database Features

(no activation depth) - objects are retrieved from the database automatically by navigating from ... , AVG, MAX, MIN). Query Expressions Path navigation expressions using the dot (.) operator. Comparison ... the content of entity objects. Tree view for navigating between entity objects. Database Server Available
Forum
26

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 ! You cannot navigate from a collection of objects to a field in these objects directly
Issue
26

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 ... to navigate lazy relationships of detached entities is a big showstopper, as we rely on that capability
Forum
26

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