Struct HashAggregate 

pub struct HashAggregate<'a> { /* private fields */ }

Implementations

impl HashAggregate<'static>

pub fn new( child: Box<dyn PhysicalOperator>, group_keys: Vec<(String, ScalarExpr)>, aggregates: Vec<AggregateSpec>, params: Vec<SQLParam>, ) -> Self

pub fn new_with_work_mem( child: Box<dyn PhysicalOperator>, group_keys: Vec<(String, ScalarExpr)>, aggregates: Vec<AggregateSpec>, params: Vec<SQLParam>, work_mem_bytes: usize, ) -> Self

impl<'a> HashAggregate<'a>

pub fn with_executor( child: Box<dyn PhysicalOperator + 'a>, output_schema: Vec<String>, executor: Box<dyn AggregateExecutor + 'a>, ) -> Self

Construct a physical aggregate backed by the engine’s full aggregate registry. Input is delivered incrementally through AggregateExecutor::consume.

pub fn with_typed_executor( child: Box<dyn PhysicalOperator + 'a>, output_schema: Vec<String>, output_types: Vec<Option<ColumnType>>, executor: Box<dyn AggregateExecutor + 'a>, ) -> Self

pub fn output_has_spilled(&self) -> bool

Whether final aggregate rows exceeded their output budget and were written to disk during the current/most recent invocation.

Trait Implementations

impl PhysicalOperator for HashAggregate<'_>

fn row_schema(&self) -> &RowSchema

Complete logical-to-physical row layout emitted by this operator. Every Batch returned by Self::next must carry this exact schema; operators must reject a child that violates that invariant.

fn open(&mut self) -> ExecResult<()>

fn next(&mut self) -> ExecResult<Option<Batch>>

fn close(&mut self) -> ExecResult<()>

fn schema(&self) -> &[String]

Schema column names in logical output order.

fn estimated_cardinality(&self) -> Option<u64>

Planner/runtime cardinality estimate for choosing physical strategies. None means the operator cannot provide a useful estimate. The value is advisory rather than a correctness bound.

fn output_ordering(&self) -> &[PhysicalOrder]

Leading output ordering known to be preserved by this operator.

fn consume_into_aggregate( &mut self, _executor: &mut dyn AggregateExecutor, ) -> ExecResult<bool>

Let a leaf consume its native projected rows directly into an aggregate executor. Returning false promises that no input was consumed, so the caller can fall back to ordinary Batch pulls.