Enum IntegerErasedStats 

pub enum IntegerErasedStats {
    U8(TypedStats<u8>),
    U16(TypedStats<u16>),
    U32(TypedStats<u32>),
    U64(TypedStats<u64>),
    I8(TypedStats<i8>),
    I16(TypedStats<i16>),
    I32(TypedStats<i32>),
    I64(TypedStats<i64>),
}

Type-erased container for one of the TypedStats variants.

Building the TypedStats is considerably faster and cheaper than building a type-erased set of stats. We then perform a variety of access methods on them.

Variants

U8(TypedStats<u8>)

Stats for u8 arrays.

U16(TypedStats<u16>)

Stats for u16 arrays.

U32(TypedStats<u32>)

Stats for u32 arrays.

U64(TypedStats<u64>)

Stats for u64 arrays.

I8(TypedStats<i8>)

Stats for i8 arrays.

I16(TypedStats<i16>)

Stats for i16 arrays.

I32(TypedStats<i32>)

Stats for i32 arrays.

I64(TypedStats<i64>)

Stats for i64 arrays.

Implementations

impl ErasedStats

pub fn min_is_zero(&self) -> bool

Returns true if the minimum value is zero.

pub fn min_is_negative(&self) -> bool

Returns true if the minimum value is negative.

pub fn max_minus_min(&self) -> u64

Difference between max and min.

pub fn max_ilog2(&self) -> Option<u32>

Returns the ilog2 of the max value when transmuted to unsigned, or None if zero.

This matches how BitPacking computes bit width: it reinterprets signed values as unsigned (preserving bit pattern) and uses leading_zeros. For non-negative signed values, the transmuted value equals the original value.

This is used to determine if FOR encoding would reduce bit width compared to direct BitPacking. If max_ilog2() == max_minus_min_ilog2(), FOR doesn’t help.

pub fn distinct_count(&self) -> Option<u32>

Get the count of distinct values, if we have computed it already.

pub fn most_frequent_value_and_count(&self) -> Option<(PValue, u32)>

Get the most commonly occurring value and its count.

Trait Implementations

impl Clone for ErasedStats

fn clone(&self) -> ErasedStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ErasedStats

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

Formats the value using the given formatter.

impl From<TypedStats<i16>> for ErasedStats

fn from(typed: TypedStats<i16>) -> Self

Converts to this type from the input type.

impl From<TypedStats<i32>> for ErasedStats

fn from(typed: TypedStats<i32>) -> Self

Converts to this type from the input type.

impl From<TypedStats<i64>> for ErasedStats

fn from(typed: TypedStats<i64>) -> Self

Converts to this type from the input type.

impl From<TypedStats<i8>> for ErasedStats

fn from(typed: TypedStats<i8>) -> Self

Converts to this type from the input type.

impl From<TypedStats<u16>> for ErasedStats

fn from(typed: TypedStats<u16>) -> Self

Converts to this type from the input type.

impl From<TypedStats<u32>> for ErasedStats

fn from(typed: TypedStats<u32>) -> Self

Converts to this type from the input type.

impl From<TypedStats<u64>> for ErasedStats

fn from(typed: TypedStats<u64>) -> Self

Converts to this type from the input type.

impl From<TypedStats<u8>> for ErasedStats

fn from(typed: TypedStats<u8>) -> Self

Converts to this type from the input type.