Enum Stat

#[non_exhaustive]
pub enum Stat {
    BitWidthFreq,
    TrailingZeroFreq,
    IsConstant,
    IsSorted,
    IsStrictSorted,
    Max,
    Min,
    RunCount,
    TrueCount,
    NullCount,
    UncompressedSizeInBytes,
}

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

BitWidthFreq

Frequency of each bit width (nulls are treated as 0)

TrailingZeroFreq

Frequency of each trailing zero (nulls are treated as 0)

IsConstant

Whether all values are the same (nulls are not equal to other non-null values, so this is true iff all values are null or all values are the same non-null value)

IsSorted

Whether the non-null values in the array are sorted (i.e., we skip nulls)

IsStrictSorted

Whether the non-null values in the array are strictly sorted (i.e., sorted with no duplicates)

Max

The maximum value in the array (ignoring nulls, unless all values are null)

Min

The minimum value in the array (ignoring nulls, unless all values are null)

RunCount

The number of runs in the array (ignoring nulls)

TrueCount

The number of true values in the array (nulls are treated as false)

NullCount

The number of null values in the array

UncompressedSizeInBytes

The uncompressed size of the array in bytes

Implementations

impl Stat

pub fn is_commutative(&self) -> bool

Whether the statistic is commutative (i.e., whether merging can be done independently of ordering) e.g., min/max are commutative, but is_sorted is not

pub fn has_same_dtype_as_array(&self) -> bool

Whether the statistic has the same dtype as the array it’s computed on

Trait Implementations

impl Clone for Stat

fn clone(&self) -> Stat

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Stat

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

Formats the value using the given formatter.

impl Display for Stat

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

Formats the value using the given formatter.

impl Enum for Stat

const LENGTH: usize = 11usize

Length of the enum.

fn from_usize(value: usize) -> Self

Takes an usize, and returns an element matching into_usize function.

fn into_usize(self) -> usize

Returns an unique identifier for a value within range of 0..Array::LENGTH.

impl<V> EnumArray<V> for Stat

type Array = [V; 11]

Representation of an enum map for type V.

impl Hash for Stat

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Stat

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Sequence for Stat

const CARDINALITY: usize = 11usize

Number of values of type Self.

fn next(&self) -> Option<Self>

Returns value following *self or None if this was the end.

fn previous(&self) -> Option<Self>

Returns value preceding *self or None if this was the beginning.

fn first() -> Option<Self>

Returns the first value of type Self.

fn last() -> Option<Self>

Returns the last value of type Self.

impl Copy for Stat

impl Eq for Stat

impl StructuralPartialEq for Stat