pub fn build_threshold_retractions<G, T>(
    input: CollectionBundle<G, Row, T>,
    arrangement: EnsureArrangement,
) -> CollectionBundle<G, Row, T>
where
    G: Scope,
    G::Timestamp: Lattice + Refines<T>,
    T: Timestamp + Lattice,
{
    let all_columns = arrangement.0.clone();
    let input = input.ensure_arrangements(Some(arrangement));
    let arrangement = input
        .arrangement(&all_columns)
        .expect("Arrangement ensured to exist");
    let negatives = match &arrangement {
        ArrangementFlavor::Local(oks, _, _) => {
            threshold_arrangement(oks, "Threshold retractions local", |count| *count < 0)
        }
        ArrangementFlavor::Trace(_, oks, _, _) => {
            threshold_arrangement(oks, "Threshold retractions trace", |count| *count < 0)
        }
    };
    let (oks, errs) = arrangement.as_collection();
    let oks = negatives
        .as_collection(|k, _| k.clone())
        .negate()
        .concat(&oks)
        .consolidate();
    CollectionBundle::from_collections(oks, errs)
}
/// Build a dataflow to threshold the input data while maintaining retractions.
///
/// This implementation maintains rows that are not part of the output, i.e. all rows that have a
/// count of less than zero. It returns a [CollectionBundle] populated from the output collection,
/// which itself is not an arrangement.
Build a dataflow to threshold the input data while maintaining retractions.
This implementation maintains rows that are not part of the output, i.e. all rows that have a
count of less than zero. It returns a [CollectionBundle] populated from the output collection,
which itself is not an arrangement.
Build a dataflow to threshold the input data while maintaining retractions . This implementation maintains rows that are not part of the output i . e . all rows that have a count of less than zero . It returns a [ CollectionBundle ] populated from the output collection which itself is not an arrangement .
pub fn build_threshold_retractions<G, T>(
    input: CollectionBundle<G, Row, T>,
    arrangement: EnsureArrangement,
) -> CollectionBundle<G, Row, T>
where
    G: Scope,
    G::Timestamp: Lattice + Refines<T>,
    T: Timestamp + Lattice,
{
    let all_columns = arrangement.0.clone();
    let input = input.ensure_arrangements(Some(arrangement));
    let arrangement = input
        .arrangement(&all_columns)
        .expect("Arrangement ensured to exist");
    let negatives = match &arrangement {
        ArrangementFlavor::Local(oks, _, _) => {
            threshold_arrangement(oks, "Threshold retractions local", |count| *count < 0)
        }
        ArrangementFlavor::Trace(_, oks, _, _) => {
            threshold_arrangement(oks, "Threshold retractions trace", |count| *count < 0)
        }
    };
    let (oks, errs) = arrangement.as_collection();
    let oks = negatives
        .as_collection(|k, _| k.clone())
        .negate()
        .concat(&oks)
        .consolidate();
    CollectionBundle::from_collections(oks, errs)
}
pub fn build_threshold_retractions < G , T > ( input : CollectionBundle < G , Row , T > , arrangement : EnsureArrangement , ) -> CollectionBundle < G , Row , T > where G : Scope , G :: Timestamp : Lattice + Refines < T > , T : Timestamp + Lattice , { let all_columns = arrangement . 0 . clone ( ) ; let input = input . ensure_arrangements ( Some ( arrangement ) ) ; let arrangement = input . arrangement ( & all_columns ) . expect ( " " ) ; let negatives = match & arrangement { ArrangementFlavor :: Local ( oks , _ , _ ) => { threshold_arrangement ( oks , " " , | count | * count < 0 ) } ArrangementFlavor :: Trace ( _ , oks , _ , _ ) => { threshold_arrangement ( oks , " " , | count | * count < 0 ) } } ; let ( oks , errs ) = arrangement . as_collection ( ) ; let oks = negatives . as_collection ( | k , _ | k . clone ( ) ) . negate ( ) . concat ( & oks ) . consolidate ( ) ; CollectionBundle :: from_collections ( oks , errs ) }
Build a dataflow to threshold the input data while maintaining retractions.
Build a dataflow to threshold the input data while maintaining retractions .
input
CollectionBundle<G, Row, T>
arrangement
EnsureArrangement
input
CollectionBundle<G, Row, T>
arrangement
EnsureArrangement