mz_arrow_util::reader

Enum ColReader

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enum ColReader {
Show 34 variants Boolean(BooleanArray), Int8 { array: Int8Array, cast: fn(_: i8) -> Datum<'static>, }, Int16(Int16Array), Int32(Int32Array), Int64(Int64Array), UInt8 { array: UInt8Array, cast: fn(_: u8) -> Datum<'static>, }, UInt16(UInt16Array), UInt32(UInt32Array), UInt64(UInt64Array), Float16 { array: Float16Array, cast: fn(_: f16) -> Datum<'static>, }, Float32(Float32Array), Float64(Float64Array), Decimal128 { array: Decimal128Array, scale_factor: Numeric, precision: usize, }, Decimal256 { array: Decimal256Array, scale_factor: Numeric, precision: usize, }, Binary(BinaryArray), LargeBinary(LargeBinaryArray), FixedSizeBinary(FixedSizeBinaryArray), BinaryView(BinaryViewArray), Uuid(Box<ColReader>), String(StringArray), LargeString(LargeStringArray), StringView(StringViewArray), Jsonb(Box<ColReader>), TimestampSecond(TimestampSecondArray), TimestampMillisecond(TimestampMillisecondArray), TimestampMicrosecond(TimestampMicrosecondArray), TimestampNanosecond(TimestampNanosecondArray), Date32(Date32Array), Date64(Date64Array), Time32Seconds(Time32SecondArray), Time32Milliseconds(Time32MillisecondArray), List { offsets: OffsetBuffer<i32>, values: Box<ColReader>, nulls: Option<NullBuffer>, }, LargeList { offsets: OffsetBuffer<i64>, values: Box<ColReader>, nulls: Option<NullBuffer>, }, Record { fields: Vec<Box<ColReader>>, nulls: Option<NullBuffer>, },
}
Expand description

A “downcasted” version of arrow::array::Array that supports reading Datums.

Note: While this is fairly verbose, one-time “downcasting” to an enum is much more performant than downcasting every time we read a Datum.

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Boolean(BooleanArray)

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Int8

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§cast: fn(_: i8) -> Datum<'static>
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Int16(Int16Array)

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Int32(Int32Array)

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Int64(Int64Array)

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UInt8

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§cast: fn(_: u8) -> Datum<'static>
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UInt16(UInt16Array)

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UInt32(UInt32Array)

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UInt64(UInt64Array)

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Float16

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§cast: fn(_: f16) -> Datum<'static>
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Float32(Float32Array)

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Float64(Float64Array)

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Decimal128

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§scale_factor: Numeric
§precision: usize
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Decimal256

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§scale_factor: Numeric
§precision: usize
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Binary(BinaryArray)

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LargeBinary(LargeBinaryArray)

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FixedSizeBinary(FixedSizeBinaryArray)

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BinaryView(BinaryViewArray)

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Uuid(Box<ColReader>)

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String(StringArray)

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LargeString(LargeStringArray)

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StringView(StringViewArray)

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Jsonb(Box<ColReader>)

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TimestampSecond(TimestampSecondArray)

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TimestampMillisecond(TimestampMillisecondArray)

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TimestampMicrosecond(TimestampMicrosecondArray)

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TimestampNanosecond(TimestampNanosecondArray)

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Date32(Date32Array)

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Date64(Date64Array)

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Time32Seconds(Time32SecondArray)

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Time32Milliseconds(Time32MillisecondArray)

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List

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§values: Box<ColReader>
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LargeList

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§values: Box<ColReader>
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Record

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§fields: Vec<Box<ColReader>>

Implementations§

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impl ColReader

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fn read(&self, idx: usize, packer: &mut RowPacker<'_>) -> Result<(), Error>

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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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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T, U> CastInto<U> for T
where U: CastFrom<T>,

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fn cast_into(self) -> U

Performs the cast.
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impl<T> CopyAs<T> for T

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fn copy_as(self) -> T

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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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impl<T> FutureExt for T

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fn with_context(self, otel_cx: Context) -> WithContext<Self>

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
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fn with_current_context(self) -> WithContext<Self>

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoRequest<T> for T

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fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
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impl<T, U> OverrideFrom<Option<&T>> for U
where U: OverrideFrom<T>,

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fn override_from(self, layer: &Option<&T>) -> U

Override the configuration represented by Self with values from the given layer.
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impl<T> Pointable for T

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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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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<P, R> ProtoType<R> for P
where R: RustType<P>,

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<'a, S, T> Semigroup<&'a S> for T
where T: Semigroup<S>,

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fn plus_equals(&mut self, rhs: &&'a S)

The method of std::ops::AddAssign, for types that do not implement AddAssign.
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,