Struct SkewAdvice 

#[non_exhaustive]
pub struct SkewAdvice {
    pub hot_partitions: Vec<usize>,
    pub factor: u32,
    pub join_keys: Vec<String>,
}

Advice returned by the skew-join rule: which partition indices should be split and what salting factor to use.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

hot_partitions: Vec<usize>

Partition indices that are hot.

factor: u32

Salting factor applied to each hot partition.

join_keys: Vec<String>

The join keys used for splitting (from the plan’s HashJoin node).

Implementations

impl SkewAdvice

pub fn is_empty(&self) -> bool

True when at least one hot partition was detected.

pub fn hot_count(&self) -> usize

Number of distinct hot partitions.

Trait Implementations

impl Clone for SkewAdvice

fn clone(&self) -> SkewAdvice

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SkewAdvice

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

Formats the value using the given formatter.

impl Eq for SkewAdvice

impl PartialEq for SkewAdvice

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SkewAdvice