Struct SegmentCacheKey 

pub struct SegmentCacheKey {
    pub segment_id: SegmentId,
    pub row_group: u32,
    pub column: Arc<str>,
}

Key for segment cache lookups.

column uses Arc<str> instead of String to make LRU promotion clones cheap (atomic refcount bump vs heap alloc).

Fields

segment_id: SegmentId

The segment this data came from.

row_group: u32

Row group index within the segment.

column: Arc<str>

Column name (cheaply clonable via Arc).

Trait Implementations

impl Clone for SegmentCacheKey

fn clone(&self) -> SegmentCacheKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SegmentCacheKey

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

Formats the value using the given formatter.

impl Eq for SegmentCacheKey

impl Hash for SegmentCacheKey

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 SegmentCacheKey

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SegmentCacheKey