Enum mz_expr::JoinImplementation

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pub enum JoinImplementation {
    Differential((usize, Option<Vec<MirScalarExpr>>, Option<JoinInputCharacteristics>), Vec<(usize, Vec<MirScalarExpr>, Option<JoinInputCharacteristics>)>),
    DeltaQuery(Vec<Vec<(usize, Vec<MirScalarExpr>, Option<JoinInputCharacteristics>)>>),
    IndexedFilter(GlobalId, GlobalId, Vec<MirScalarExpr>, Vec<Row>),
    Unimplemented,
}
Expand description

Describe a join implementation in dataflow.

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Differential((usize, Option<Vec<MirScalarExpr>>, Option<JoinInputCharacteristics>), Vec<(usize, Vec<MirScalarExpr>, Option<JoinInputCharacteristics>)>)

Perform a sequence of binary differential dataflow joins.

The first argument indicates

  1. the index of the starting collection,
  2. if it should be arranged, the keys to arrange it by, and
  3. the characteristics of the starting collection (for EXPLAINing). The sequence that follows lists other relation indexes, and the key for the arrangement we should use when joining it in. The JoinInputCharacteristics are for EXPLAINing the characteristics that were used for join ordering.

Each collection index should occur exactly once, either as the starting collection or somewhere in the list.

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DeltaQuery(Vec<Vec<(usize, Vec<MirScalarExpr>, Option<JoinInputCharacteristics>)>>)

Perform independent delta query dataflows for each input.

The argument is a sequence of plans, for the input collections in order. Each plan starts from the corresponding index, and then in sequence joins against collections identified by index and with the specified arrangement key. The JoinInputCharacteristics are for EXPLAINing the characteristics that were used for join ordering.

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IndexedFilter(GlobalId, GlobalId, Vec<MirScalarExpr>, Vec<Row>)

Join a user-created index with a constant collection to speed up the evaluation of a predicate such as (f1 = 3 AND f2 = 5) OR (f1 = 7 AND f2 = 9). This gets translated to a Differential join during MIR -> LIR lowering, but we still want to represent it in MIR, because the fast path detection wants to match on this.

Consists of (<coll_id>, <index_id>, <index_key>, <constants>)

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Unimplemented

No implementation yet selected.

Implementations§

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impl JoinImplementation

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pub fn is_implemented(&self) -> bool

Returns true iff the value is not JoinImplementation::Unimplemented.

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pub fn name(&self) -> Option<&'static str>

Returns an optional implementation name if the value is not JoinImplementation::Unimplemented.

Trait Implementations§

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impl Clone for JoinImplementation

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fn clone(&self) -> JoinImplementation

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for JoinImplementation

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for JoinImplementation

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<'de> Deserialize<'de> for JoinImplementation

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Hash for JoinImplementation

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl MzReflect for JoinImplementation

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fn add_to_reflected_type_info(rti: &mut ReflectedTypeInfo)

Adds names and types of the fields of the struct or enum to rti. Read more
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impl Ord for JoinImplementation

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fn cmp(&self, other: &JoinImplementation) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for JoinImplementation

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fn eq(&self, other: &JoinImplementation) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for JoinImplementation

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fn partial_cmp(&self, other: &JoinImplementation) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Serialize for JoinImplementation

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Eq for JoinImplementation

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impl StructuralPartialEq for JoinImplementation

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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where T: ?Sized,

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Immutably borrows from an owned value. Read more
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Mutably borrows from an owned value. Read more
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Performs the cast.
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fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.
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impl<R, O, T> CopyOnto<ConsecutiveOffsetPairs<R, O>> for T
where R: Region<Index = (usize, usize)>, O: OffsetContainer<usize>, T: CopyOnto<R>,

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fn copy_onto( self, target: &mut ConsecutiveOffsetPairs<R, O> ) -> <ConsecutiveOffsetPairs<R, O> as Region>::Index

Copy self into the target container, returning an index that allows to look up the corresponding read item.
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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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where T: Clone,

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Converts to this type from a reference to the input type.
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A well-distributed integer derived from the data.
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Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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Calls U::from(self).

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Override the configuration represented by Self with values from the given layer.
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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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Push self into the target container.
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Push self into the target container.
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