Struct JoinHashState 

pub struct JoinHashState { /* private fields */ }

Immutable build-side state shared by every probe consumer of one physical JOIN edge.

The row batch, key layout and hash table travel as one object. This makes it impossible to attach a pre-built table to a different row ordering or a different set of key columns, while cheap clones let a fused physical pipeline reuse the same build state without rebuilding it.

Implementations

impl JoinHashState

pub fn build(build_rows: CompactArc<Vec<Row>>, key_indices: &[usize]) -> Self

Build one immutable hash state for an already materialized physical batch. No row is copied: the state retains the exact batch identity.

pub fn try_build( build_rows: CompactArc<Vec<Row>>, key_indices: &[usize], max_bytes: usize, ) -> Option<Self>

Build only when the immutable bucket/entry state fits its admission budget. None selects the bounded scan fallback rather than risking an allocator abort or process OOM.

pub fn build_with_bloom( build_rows: CompactArc<Vec<Row>>, key_indices: &[usize], observer: &mut impl JoinHashObserver, ) -> Self

Build one state while populating a bloom accelerator in the same pass. Keeping this constructor here prevents callers from pairing a table built for one key layout with metadata claiming another layout.

pub fn matches( &self, build_rows: &CompactArc<Vec<Row>>, key_indices: &[usize], ) -> bool

Whether this state belongs to exactly this immutable batch and key layout. Pointer identity is intentional: equal values in a newly materialized batch do not prove equal physical row indices.

pub fn build_rows(&self) -> &CompactArc<Vec<Row>>

pub fn table(&self) -> &Arc<JoinHashTable>

Trait Implementations

impl Clone for JoinHashState

fn clone(&self) -> JoinHashState

Returns a duplicate of the value.

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

Performs copy-assignment from source.