I'm personally not that much against query builders, but I dislike things that try to hide the database. Any datastructure that transparently performs database

I'm personally not that much against query builders, but I dislike things that try to hide the database. Any datastructure that transparently performs database queries as you access items in it goes swiftly in my "nope" pile. A reasonable exception can be made for streaming iterators in a statically typed context, though that has its own issues. I especially dislike "load" methods on objects since they hide what is potentially a very expensive operation behind something that looks cheap and is easy to call in a loop; what I want is to query data first and then load it into objects if needed rather than create objects for querying data.