Struct datafusion::exec::ProjectRelation

pub struct ProjectRelation { /* fields omitted */ }

Trait Implementations

impl SimpleRelation for ProjectRelation

fn scan<'a>(
    &'a self,
    ctx: &'a ExecutionContext
) -> Box<Iterator<Item = Result<Tuple, ExecutionError>> + 'a>

scan all records in this relation

fn schema<'a>(&'a self) -> &'a TupleType

get the schema for this relation