Struct ContentDigest 

pub struct ContentDigest {
    pub rows: u64,
    pub sum: u128,
    pub xor: u128,
    pub key_min: Option<i64>,
    pub key_max: Option<i64>,
}

An order-independent digest of a set of rows.

Fields

rows: u64

sum: u128

Wrapping sum of the row fingerprints.

xor: u128

XOR of the row fingerprints (catches a sum collision from swapped rows).

key_min: Option<i64>

Smallest / largest integer key seen (single integer keys only).

key_max: Option<i64>

Implementations

impl ContentDigest

pub fn same(&self, other: &ContentDigest) -> bool

Whether two digests describe the same row set.

pub fn bounds_union(&self, other: &ContentDigest) -> Option<(i64, i64)>

The union of the observed key bounds of two digests.

Trait Implementations

impl Clone for ContentDigest

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ContentDigest

impl Debug for ContentDigest

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

Formats the value using the given formatter.

impl Default for ContentDigest

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ContentDigest

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ContentDigest

impl PartialEq for ContentDigest

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ContentDigest

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ContentDigest