pub fn ensure_arrangements<K: IntoIterator<Item = dataflow_types::plan::EnsureArrangement>>(
        mut self,
        keys: K,
    ) -> Self {
        for (key, permutation, thinning) in keys {
            if !self.arranged.contains_key(&key) {
                // TODO: Consider allowing more expressive names.
                let name = format!("ArrangeBy[{:?}]", key);
                let key2 = key.clone();
                if self.collection.is_none() {
                    // Cache collection to avoid reforming it each time.
                    // TODO(mcsherry): In theory this could be faster run out of another arrangement,
                    // as the `map_fallible` that follows could be run against an arrangement itself.
                    self.collection = Some(self.as_collection());
                }
                let (oks, errs) = self.as_collection();
                let mut row_packer = Row::default();

                let mut datums = DatumVec::new();
                let (oks_keyed, errs_keyed) = oks.map_fallible("FormArrangementKey", move |row| {
                    // TODO: Consider reusing the `row` allocation; probably in *next* invocation.
                    let datums = datums.borrow_with(&row);
                    let temp_storage = RowArena::new();
                    row_packer.try_extend(key2.iter().map(|k| k.eval(&datums, &temp_storage)))?;
                    let key_row = row_packer.finish_and_reuse();
                    row_packer.extend(thinning.iter().map(|c| datums[*c]));
                    let val_row = row_packer.finish_and_reuse();
                    Ok::<(Row, Row), DataflowError>((key_row, val_row))
                });

                let oks = oks_keyed.arrange_named::<RowSpine<Row, Row, _, _>>(&name);
                let errs = errs
                    .concat(&errs_keyed)
                    .arrange_named::<ErrSpine<_, _, _>>(&format!("{}-errors", name));
                self.arranged
                    .insert(key, ArrangementFlavor::Local(oks, errs, permutation));
            }
        }
        self
    }
/// Ensures that arrangements in `keys` are present, creating them if they do not exist.
Ensures that arrangements in `keys` are present, creating them if they do not exist.
Ensures that arrangements in ` keys ` are present creating them if they do not exist .
pub fn ensure_arrangements<K: IntoIterator<Item = dataflow_types::plan::EnsureArrangement>>(
        mut self,
        keys: K,
    ) -> Self {
        for (key, permutation, thinning) in keys {
            if !self.arranged.contains_key(&key) {
                // TODO: Consider allowing more expressive names.
                let name = format!("ArrangeBy[{:?}]", key);
                let key2 = key.clone();
                if self.collection.is_none() {
                    // Cache collection to avoid reforming it each time.
                    // TODO(mcsherry): In theory this could be faster run out of another arrangement,
                    // as the `map_fallible` that follows could be run against an arrangement itself.
                    self.collection = Some(self.as_collection());
                }
                let (oks, errs) = self.as_collection();
                let mut row_packer = Row::default();
                let mut datums = DatumVec::new();
                let (oks_keyed, errs_keyed) = oks.map_fallible("FormArrangementKey", move |row| {
                    // TODO: Consider reusing the `row` allocation; probably in *next* invocation.
                    let datums = datums.borrow_with(&row);
                    let temp_storage = RowArena::new();
                    row_packer.try_extend(key2.iter().map(|k| k.eval(&datums, &temp_storage)))?;
                    let key_row = row_packer.finish_and_reuse();
                    row_packer.extend(thinning.iter().map(|c| datums[*c]));
                    let val_row = row_packer.finish_and_reuse();
                    Ok::<(Row, Row), DataflowError>((key_row, val_row))
                });
                let oks = oks_keyed.arrange_named::<RowSpine<Row, Row, _, _>>(&name);
                let errs = errs
                    .concat(&errs_keyed)
                    .arrange_named::<ErrSpine<_, _, _>>(&format!("{}-errors", name));
                self.arranged
                    .insert(key, ArrangementFlavor::Local(oks, errs, permutation));
            }
        }
        self
    }
pub fn ensure_arrangements < K : IntoIterator < Item = dataflow_types :: plan :: EnsureArrangement > > ( mut self , keys : K , ) -> Self { for ( key , permutation , thinning ) in keys { if ! self . arranged . contains_key ( & key ) { // TODO: Consider allowing more expressive names. let name = format ! ( " " key ) ; let key2 = key . clone ( ) ; if self . collection . is_none ( ) { // Cache collection to avoid reforming it each time. // TODO(mcsherry): In theory this could be faster run out of another arrangement, // as the `map_fallible` that follows could be run against an arrangement itself. self . collection = Some ( self . as_collection ( ) ) ; } let ( oks , errs ) = self . as_collection ( ) ; let mut row_packer = Row :: default ( ) ; let mut datums = DatumVec :: new ( ) ; let ( oks_keyed , errs_keyed ) = oks . map_fallible ( " " , move | row | { // TODO: Consider reusing the `row` allocation; probably in *next* invocation. let datums = datums . borrow_with ( & row ) ; let temp_storage = RowArena :: new ( ) ; row_packer . try_extend ( key2 . iter ( ) . map ( | k | k . eval ( & datums , & temp_storage ) ) ) ? ; let key_row = row_packer . finish_and_reuse ( ) ; row_packer . extend ( thinning . iter ( ) . map ( | c | datums [ * c ] ) ) ; let val_row = row_packer . finish_and_reuse ( ) ; Ok :: < ( Row , Row ) , DataflowError > ( ( key_row , val_row ) ) } ) ; let oks = oks_keyed . arrange_named :: < RowSpine < Row , Row , _ , _ > > ( & name ) ; let errs = errs . concat ( & errs_keyed ) . arrange_named :: < ErrSpine < _ , _ , _ > > ( & format ! ( " " name ) ) ; self . arranged . insert ( key , ArrangementFlavor :: Local ( oks , errs , permutation ) ) ; } } self }
Ensures that arrangements in `keys` are present, creating them if they do not exist.
Ensures that arrangements in ` keys ` are present creating them if they do not exist .
mut self
keys
K
mut self
keys
K