Type Alias ProjectRows 

pub type ProjectRows = Box<dyn Iterator<Item = ExecResult<ResultRow>> + Send>;

Owned row stream produced for one input row.

The iterator yields errors at the exact row where production failed. This matters for generators backed by files or user code: eagerly collecting a Vec both defeated the Volcano memory boundary and made late failures impossible to represent without discarding already-produced rows.

Aliased Type

pub struct ProjectRows(/* private fields */);