HQL: get last element of collection

问题

I have Person entity, which have many-to-many relationship with Address entity (which has some boolean property). This relationship represent with help of separate table (which is not an entity)

I need a query like: "from Person p where p.addresses is empty or p.addresses.getLastElement.propert is TRUE"

Question:

1. Can I pull the last element of p.addresses collection in HQL question? If yes, How?
2. If no, can I represent many-to-many relationship as entity?

回答1:

Can I pull the last element of p.addresses collection in HQL question? If yes, How?

For this question, you can try out the following:

from Person p where p.addresses[size(p.addresses) - 1].propert = TRUE

This won't fetch the last entity of collection but will check the last entity's property's value & will fetch Person accordingly.

来源：https://stackoverflow.com/questions/19681268/hql-get-last-element-of-collection