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Is here the way to regulate result of query to child tables of an entity. [message #1011860]

Wed, 20 February 2013 06:43

Eclipse User

Greetings!

Is here way to regulate the fact is query returning data from the child tables of actual entity?

For example, if here one entity relates to another with one to many relationship, could developer to query database for first entity instances only without instances of second one?

Thank you,

[Updated on: Fri, 01 March 2013 07:55] by Moderator

Re: Is here the way to regulate result of query to child tables of an entity. [message #1014845 is a reply to message #1011860]

Tue, 26 February 2013 10:17

Eclipse User

If you make the relationship LAZY, it will not be fetch until it is accessed.

EclipseLink also supports fetch groups to load partial objects.

In JPQL you can also select specific fields instead of the entire object.

Re: Is here the way to regulate result of query to child tables of an entity. [message #1015628 is a reply to message #1014845]

Fri, 01 March 2013 07:53

Eclipse User

Thank you Mr. Sutherland

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