Struct SortSpec 

pub struct SortSpec { /* private fields */ }

A request to sort a relation, sized but not yet executed.

estimated_rows / estimated_bytes are the planner’s only view of the input magnitude; they need not be exact, but a gross under-estimate pushes a large sort onto the in-memory path and a gross over-estimate wastes spill buffers. Callers derive them from cardinality estimates and per-row width.

Implementations

impl SortSpec

pub fn new(estimated_rows: u64, estimated_bytes: u64) -> Self

Describe a sort of estimated_rows rows totalling roughly estimated_bytes of key + value bytes.

pub fn with_dedup(self, dedup: bool) -> Self

Request that equal-key rows be collapsed to one during the merge.

pub fn labelled(self, label: &'static str) -> Self

Attach a short static label used in tracing and statistics.

pub fn estimated_rows(&self) -> u64

Estimated number of rows to be sorted.

pub fn estimated_bytes(&self) -> u64

Estimated total key + value bytes to be sorted.

pub fn dedup(&self) -> bool

Whether equal-key rows are collapsed during the merge.

pub fn label(&self) -> &'static str

The short static label for tracing and stats.

Trait Implementations

impl Clone for SortSpec

fn clone(&self) -> SortSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SortSpec

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

Formats the value using the given formatter.