ObjectDB ObjectDB

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.

You need to use JOIN in JPA and contains in JDO.

So if the parameter y is a collection the expression y.b is invalid.

ObjectDB Support
ObjectDB - Fast Object Database for Java (JPA/JDO)


To post on this website please sign in.