How can I limit the number of columns being fetched by ActiveJDBC? Is there something similar to Hibernate Projections in ActiveJDBC?
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Technically speaking, ActiveJDBC is an ORM, and as such will fetch all attributes related to a model (all columns from table). If a model instance is does not have them all, than the 'O' is missing from the ORM :). In other words, it stops being an object that represents a relation.
If this is absolutely what you need to do, then you can do the following:
List<Person> retirees = Person.findBySql("select first_name, last_name from people where age > ? ", 65);This way, the query will populate only the
first_nameandlast_nameattributes. In general, you can pass any query to thefindBySql(), and the model will read values whose names match that model's attribute names.