polars_core::chunked_array::metadata

Struct Metadata

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pub struct Metadata<T: PolarsDataType> { /* private fields */ }

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impl<T: PolarsDataType> Metadata<T>

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pub const DEFAULT: Metadata<T> = _

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pub fn sorted(self, is_sorted: IsSorted) -> Self

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pub fn fast_explode_list(self, fast_explode_list: bool) -> Self

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pub fn flags(self, flags: MetadataFlags) -> Self

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pub fn min_value(self, min_value: T::OwnedPhysical) -> Self

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pub fn max_value(self, max_value: T::OwnedPhysical) -> Self

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pub fn distinct_count(self, distinct_count: IdxSize) -> Self

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pub fn sorted_opt(self, is_sorted: Option<IsSorted>) -> Self

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pub fn fast_explode_list_opt(self, fast_explode_list: Option<bool>) -> Self

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pub fn flags_opt(self, flags: Option<MetadataFlags>) -> Self

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pub fn min_value_opt(self, min_value: Option<T::OwnedPhysical>) -> Self

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pub fn max_value_opt(self, max_value: Option<T::OwnedPhysical>) -> Self

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pub fn distinct_count_opt(self, distinct_count: Option<IdxSize>) -> Self

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pub fn filter_props_cast<O: PolarsDataType>( &self, props: MetadataProperties, ) -> Metadata<O>

Create a Metadata with only the properties set in props.

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pub fn filter_props(&self, props: MetadataProperties) -> Self

Create a Metadata with only the properties set in props.

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pub fn merge(&self, other: Self) -> MetadataMerge<T>

Merge the maximum information from both Metadatas into one Metadata.

It returns

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pub fn is_empty(&self) -> bool

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pub fn is_sorted_ascending(&self) -> bool

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pub fn set_sorted_ascending(&mut self, value: bool)

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pub fn is_sorted_descending(&self) -> bool

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pub fn set_sorted_descending(&mut self, value: bool)

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pub fn get_fast_explode_list(&self) -> bool

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pub fn set_fast_explode_list(&mut self, value: bool)

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pub fn is_sorted_any(&self) -> bool

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pub fn is_sorted(&self) -> IsSorted

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pub fn set_sorted_flag(&mut self, is_sorted: IsSorted)

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pub fn set_flags(&mut self, flags: MetadataFlags)

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pub fn set_min_value(&mut self, min_value: Option<T::OwnedPhysical>)

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pub fn set_max_value(&mut self, max_value: Option<T::OwnedPhysical>)

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pub fn set_distinct_count(&mut self, distinct_count: Option<IdxSize>)

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pub fn get_flags(&self) -> MetadataFlags

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pub fn get_min_value(&self) -> Option<&T::OwnedPhysical>

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pub fn get_max_value(&self) -> Option<&T::OwnedPhysical>

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pub fn get_distinct_count(&self) -> Option<IdxSize>

Trait Implementations§

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impl<T: PolarsDataType> Clone for Metadata<T>

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fn clone(&self) -> Self

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<T: PolarsDataType> Debug for Metadata<T>

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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<T: PolarsDataType> Default for Metadata<T>

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<T: PolarsDataType> MetadataTrait for Metadata<T>

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fn get_flags(&self) -> MetadataFlags

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fn min_value(&self) -> Option<Scalar>

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fn max_value(&self) -> Option<Scalar>

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fn distinct_count(&self) -> Option<IdxSize>

Number of unique non-null values

Auto Trait Implementations§

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impl<T> Freeze for Metadata<T>

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impl<T> RefUnwindSafe for Metadata<T>

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impl<T> Send for Metadata<T>

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impl<T> Sync for Metadata<T>

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impl<T> Unpin for Metadata<T>

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impl<T> UnwindSafe for Metadata<T>

Blanket 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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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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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, 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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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<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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