Trait rlink::functions::reduce::schema_reduce::Aggregation[−][src]

pub trait Aggregation: Debug {
    fn output_field(&self) -> &Field;
    fn len(&self) -> usize;
    fn reduce(
        &self, 
        writer: &mut BufferWriter<'_, '_>, 
        value_reader: Option<&mut BufferMutReader<'_, '_>>, 
        value_index: usize, 
        record_reader: &mut BufferReader<'_, '_>
    );
}