Enum mz_expr::AggregateFunc

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pub enum AggregateFunc {
Show 60 variants MaxNumeric, MaxInt16, MaxInt32, MaxInt64, MaxUInt16, MaxUInt32, MaxUInt64, MaxMzTimestamp, MaxFloat32, MaxFloat64, MaxBool, MaxString, MaxDate, MaxTimestamp, MaxTimestampTz, MaxInterval, MaxTime, MinNumeric, MinInt16, MinInt32, MinInt64, MinUInt16, MinUInt32, MinUInt64, MinMzTimestamp, MinFloat32, MinFloat64, MinBool, MinString, MinDate, MinTimestamp, MinTimestampTz, MinInterval, MinTime, SumInt16, SumInt32, SumInt64, SumUInt16, SumUInt32, SumUInt64, SumFloat32, SumFloat64, SumNumeric, Count, Any, All, JsonbAgg { order_by: Vec<ColumnOrder>, }, JsonbObjectAgg { order_by: Vec<ColumnOrder>, }, MapAgg { order_by: Vec<ColumnOrder>, value_type: ScalarType, }, ArrayConcat { order_by: Vec<ColumnOrder>, }, ListConcat { order_by: Vec<ColumnOrder>, }, StringAgg { order_by: Vec<ColumnOrder>, }, RowNumber { order_by: Vec<ColumnOrder>, }, Rank { order_by: Vec<ColumnOrder>, }, DenseRank { order_by: Vec<ColumnOrder>, }, LagLead { order_by: Vec<ColumnOrder>, lag_lead: LagLeadType, ignore_nulls: bool, }, FirstValue { order_by: Vec<ColumnOrder>, window_frame: WindowFrame, }, LastValue { order_by: Vec<ColumnOrder>, window_frame: WindowFrame, }, WindowAggregate { wrapped_aggregate: Box<AggregateFunc>, order_by: Vec<ColumnOrder>, window_frame: WindowFrame, }, Dummy,
}

Variants§

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MaxNumeric

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MaxInt16

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MaxInt32

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MaxInt64

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MaxUInt16

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MaxUInt32

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MaxUInt64

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MaxMzTimestamp

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MaxFloat32

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MaxFloat64

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MaxBool

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MaxString

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MaxDate

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MaxTimestamp

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MaxTimestampTz

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MaxInterval

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MaxTime

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MinNumeric

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MinInt16

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MinInt32

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MinInt64

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MinUInt16

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MinUInt32

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MinUInt64

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MinMzTimestamp

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MinFloat32

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MinFloat64

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MinBool

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MinString

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MinDate

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MinTimestamp

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MinTimestampTz

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MinInterval

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MinTime

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SumInt16

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SumInt32

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SumInt64

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SumUInt16

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SumUInt32

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SumUInt64

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SumFloat32

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SumFloat64

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SumNumeric

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Count

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Any

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All

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JsonbAgg

Accumulates Datum::Lists whose first element is a JSON-typed Datums into a JSON list. The other elements are columns used by order_by.

WARNING: Unlike the jsonb_agg function that is exposed by the SQL layer, this function filters out Datum::Null, for consistency with the other aggregate functions.

Fields

§order_by: Vec<ColumnOrder>
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JsonbObjectAgg

Zips Datum::Lists whose first element is a JSON-typed Datums into a JSON map. The other elements are columns used by order_by.

WARNING: Unlike the jsonb_object_agg function that is exposed by the SQL layer, this function filters out Datum::Null, for consistency with the other aggregate functions.

Fields

§order_by: Vec<ColumnOrder>
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MapAgg

Zips a Datum::List whose first element is a Datum::List guaranteed to be non-empty and whose len % 2 == 0 into a Datum::Map. The other elements are columns used by order_by.

Fields

§order_by: Vec<ColumnOrder>
§value_type: ScalarType
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ArrayConcat

Accumulates Datum::Arrays of ScalarType::Record whose first element is a Datum::Array into a single Datum::Array (the remaining fields are used by order_by).

Fields

§order_by: Vec<ColumnOrder>
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ListConcat

Accumulates Datum::Lists of ScalarType::Record whose first field is a Datum::List into a single Datum::List (the remaining fields are used by order_by).

Fields

§order_by: Vec<ColumnOrder>
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StringAgg

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§order_by: Vec<ColumnOrder>
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RowNumber

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§order_by: Vec<ColumnOrder>
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Rank

Fields

§order_by: Vec<ColumnOrder>
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DenseRank

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§order_by: Vec<ColumnOrder>
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LagLead

Fields

§order_by: Vec<ColumnOrder>
§lag_lead: LagLeadType
§ignore_nulls: bool
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FirstValue

Fields

§order_by: Vec<ColumnOrder>
§window_frame: WindowFrame
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LastValue

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§order_by: Vec<ColumnOrder>
§window_frame: WindowFrame
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WindowAggregate

Fields

§wrapped_aggregate: Box<AggregateFunc>
§order_by: Vec<ColumnOrder>
§window_frame: WindowFrame
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Dummy

Accumulates any number of Datum::Dummys into Datum::Dummy.

Useful for removing an expensive aggregation while maintaining the shape of a reduce operator.

Implementations§

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impl AggregateFunc

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pub fn eval<'a, I>(&self, datums: I, temp_storage: &'a RowArena) -> Datum<'a>
where I: IntoIterator<Item = Datum<'a>>,

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pub fn eval_fast_window_agg<'a, I, W>( &self, datums: I, temp_storage: &'a RowArena ) -> Datum<'a>
where I: IntoIterator<Item = Datum<'a>>, W: OneByOneAggr,

Like eval, but it’s given a OneByOneAggr. If self is a WindowAggregate, then the given OneByOneAggr will be used to evaluate the wrapped aggregate inside the WindowAggregate. If self is not a WindowAggregate, then it simply calls eval.

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pub fn default(&self) -> Datum<'static>

Returns the output of the aggregation function when applied on an empty input relation.

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pub fn identity_datum(&self) -> Datum<'static>

Returns a datum whose inclusion in the aggregation will not change its result.

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pub fn output_type(&self, input_type: ColumnType) -> ColumnType

The output column type for the result of an aggregation.

The output column type also contains nullability information, which is (without further information) true for aggregations that are not counts.

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pub fn propagates_nonnull_constraint(&self) -> bool

Returns true if the non-null constraint on the aggregation can be converted into a non-null constraint on its parameter expression, ie. whether the result of the aggregation is null if all the input values are null.

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impl AggregateFunc

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

The base function name without the ~[...] suffix used when rendering variants that represent a parameterized function family.

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impl Arbitrary for AggregateFunc

An explicit Arbitrary implementation needed here because of a known proptest issue.

Revert to the derive-macro implementation once the issue1 is fixed.

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type Parameters = ()

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.
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type Strategy = Union<BoxedStrategy<AggregateFunc>>

The type of Strategy used to generate values of type Self.
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fn arbitrary_with(_: Self::Parameters) -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args. Read more
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fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). Read more
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impl Clone for AggregateFunc

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fn clone(&self) -> AggregateFunc

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

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

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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<'de> Deserialize<'de> for AggregateFunc

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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 AggregateFunc

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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 AggregateFunc

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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 AggregateFunc

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fn cmp(&self, other: &AggregateFunc) -> 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 AggregateFunc

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fn eq(&self, other: &AggregateFunc) -> 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 AggregateFunc

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fn partial_cmp(&self, other: &AggregateFunc) -> 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 RustType<ProtoAggregateFunc> for AggregateFunc

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fn into_proto(&self) -> ProtoAggregateFunc

Convert a Self into a Proto value.
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fn from_proto(proto: ProtoAggregateFunc) -> Result<Self, TryFromProtoError>

Consume and convert a Proto back into a Self value. Read more
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impl Serialize for AggregateFunc

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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 AggregateFunc

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impl StructuralPartialEq for AggregateFunc

Auto Trait Implementations§

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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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impl<T, U> CastInto<U> for T
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fn cast_into(self) -> U

Performs the cast.
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impl<Q, K> Comparable<K> for Q
where Q: Ord + ?Sized, K: Borrow<Q> + ?Sized,

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fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.
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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<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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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
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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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Converts to this type from a reference to the input type.
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type Output = u64

The type of the output value.
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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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