Enum mz_compute::render::context::ArrangementFlavor
source · pub enum ArrangementFlavor<S: Scope, T = Timestamp>where
T: Timestamp + Lattice + Columnation,
S::Timestamp: Lattice + Refines<T> + Columnation,{
Local(SpecializedArrangement<S>, Arranged<S, TraceAgent<ColKeySpine<DataflowError, <S as ScopeParent>::Timestamp, Diff>>>),
Trace(GlobalId, SpecializedArrangementImport<S, T>, Arranged<S, TraceEnter<TraceFrontier<TraceAgent<ColKeySpine<DataflowError, T, Diff>>>, <S as ScopeParent>::Timestamp>>),
}
Expand description
Describes flavor of arrangement: local or imported trace.
Variants§
Local(SpecializedArrangement<S>, Arranged<S, TraceAgent<ColKeySpine<DataflowError, <S as ScopeParent>::Timestamp, Diff>>>)
A dataflow-local arrangement.
Trace(GlobalId, SpecializedArrangementImport<S, T>, Arranged<S, TraceEnter<TraceFrontier<TraceAgent<ColKeySpine<DataflowError, T, Diff>>>, <S as ScopeParent>::Timestamp>>)
An imported trace from outside the dataflow.
The GlobalId
identifier exists so that exports of this same trace
can refer back to and depend on the original instance.
Implementations§
source§impl<S: Scope, T> ArrangementFlavor<S, T>where
T: Timestamp + Lattice + Columnation,
S::Timestamp: Lattice + Refines<T> + Columnation,
impl<S: Scope, T> ArrangementFlavor<S, T>where T: Timestamp + Lattice + Columnation, S::Timestamp: Lattice + Refines<T> + Columnation,
sourcepub fn as_collection(
&self
) -> (Collection<S, Row, Diff>, Collection<S, DataflowError, Diff>)
pub fn as_collection( &self ) -> (Collection<S, Row, Diff>, Collection<S, DataflowError, Diff>)
Presents self
as a stream of updates.
This method presents the contents as they are, without further computation.
If you have logic that could be applied to each record, consider using the
flat_map
methods which allows this and can reduce the work done.
sourcepub fn flat_map<I, C, L>(
&self,
key: Option<Row>,
constructor: C
) -> (Stream<S, I::Item>, Collection<S, DataflowError, Diff>)where
I: IntoIterator,
I::Item: Data,
C: FnOnce() -> L,
L: for<'a, 'b> FnMut(&'a mut DatumVecBorrow<'b>, &'a S::Timestamp, &'a Diff) -> I + 'static,
pub fn flat_map<I, C, L>( &self, key: Option<Row>, constructor: C ) -> (Stream<S, I::Item>, Collection<S, DataflowError, Diff>)where I: IntoIterator, I::Item: Data, C: FnOnce() -> L, L: for<'a, 'b> FnMut(&'a mut DatumVecBorrow<'b>, &'a S::Timestamp, &'a Diff) -> I + 'static,
Constructs and applies logic to elements of self
and returns the results.
constructor
takes a permutation and produces the logic to apply on elements. The logic
conceptually receives (&Row, &Row)
pairs in the form of a slice. Only after borrowing
the elements and applying the permutation the datums will be in the expected order.
If key
is set, this is a promise that logic
will produce no results on
records for which the key does not evaluate to the value. This is used to
leap directly to exactly those records.
source§impl<S: Scope, T> ArrangementFlavor<S, T>where
T: Timestamp + Lattice + Columnation,
S::Timestamp: Lattice + Refines<T> + Columnation,
impl<S: Scope, T> ArrangementFlavor<S, T>where T: Timestamp + Lattice + Columnation, S::Timestamp: Lattice + Refines<T> + Columnation,
sourcepub fn enter_region<'a>(
&self,
region: &Child<'a, S, S::Timestamp>
) -> ArrangementFlavor<Child<'a, S, S::Timestamp>, T>
pub fn enter_region<'a>( &self, region: &Child<'a, S, S::Timestamp> ) -> ArrangementFlavor<Child<'a, S, S::Timestamp>, T>
Brings the arrangement flavor into a region.
source§impl<'a, S: Scope, T> ArrangementFlavor<Child<'a, S, S::Timestamp>, T>where
T: Timestamp + Lattice + Columnation,
S::Timestamp: Lattice + Refines<T> + Columnation,
impl<'a, S: Scope, T> ArrangementFlavor<Child<'a, S, S::Timestamp>, T>where T: Timestamp + Lattice + Columnation, S::Timestamp: Lattice + Refines<T> + Columnation,
sourcepub fn leave_region(&self) -> ArrangementFlavor<S, T>
pub fn leave_region(&self) -> ArrangementFlavor<S, T>
Extracts the arrangement flavor from a region.
Trait Implementations§
source§impl<S: Clone + Scope, T> Clone for ArrangementFlavor<S, T>where
T: Timestamp + Lattice + Columnation + Clone,
S::Timestamp: Lattice + Refines<T> + Columnation,
impl<S: Clone + Scope, T> Clone for ArrangementFlavor<S, T>where T: Timestamp + Lattice + Columnation + Clone, S::Timestamp: Lattice + Refines<T> + Columnation,
source§fn clone(&self) -> ArrangementFlavor<S, T>
fn clone(&self) -> ArrangementFlavor<S, T>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreAuto Trait Implementations§
impl<S, T = Timestamp> !RefUnwindSafe for ArrangementFlavor<S, T>
impl<S, T = Timestamp> !Send for ArrangementFlavor<S, T>
impl<S, T = Timestamp> !Sync for ArrangementFlavor<S, T>
impl<S, T> Unpin for ArrangementFlavor<S, T>where S: Unpin, T: Unpin, <S as ScopeParent>::Timestamp: Unpin,
impl<S, T = Timestamp> !UnwindSafe for ArrangementFlavor<S, T>
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