javaandroidormlite

Does ORMLITE support SQL EXISTS?

I am trying to query a table as follows 

select * from client c
    where EXISTS (select * from visit v where c._id = v.client_id)

Can i do this with ORMLITE?

Solution

  • Yes you can. Where.exists() has been supported my ORMLite for some time. Here are the meager docs on exists.

    You would do something like the following:

    QueryBuilder<Visit, Integer> visitQb = visitDao.queryBuilder();
visitQb.where().eq(Visit.CLIENT_ID_FIELD, client.getId());
QueryBuilder<Client, Integer> clientQb = clientDao.queryBuilder();
clientQb.where().exists(visitQb);
List<Client> results = clientQb.query();