Struct RowIteratorScan 

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

Physical scan over a fallible row iterator. Unlike VecSource, this adapter preserves producer backpressure and late errors without requiring a cardinality-sized staging vector.

Implementations

impl<'a> RowIteratorScan<'a>

pub fn new( schema: Vec<String>, rows: Box<dyn Iterator<Item = ExecResult<ResultRow>> + Send + 'a>, ) -> Self

pub fn with_types( schema: Vec<String>, types: Vec<Option<ColumnType>>, rows: Box<dyn Iterator<Item = ExecResult<ResultRow>> + Send + 'a>, ) -> Self

pub fn with_row_schema( schema: RowSchema, rows: Box<dyn Iterator<Item = ExecResult<ResultRow>> + Send + 'a>, ) -> Self

Trait Implementations

impl PhysicalOperator for RowIteratorScan<'_>

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.