select
Commonly used for select(Meta.id) to get a document's ID, or other metadata or expressions.
SELECT Meta().id
Commonly used for select(Meta.id, "foo", "bar") to get a document's ID along with a set of fields.
SELECT Meta().id, foo, bar
Commonly used for select(Meta.id, all()) to get all of the document, including ID.
SELECT Meta().id, *