Struct JoinOutput 

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

Reorder and merge join columns while retaining the joined physical row. Inner, left, and right joins are schema-only remaps; a full join appends only the merged values that cannot be represented by one existing slot.

Implementations

impl<'a> JoinOutput<'a>

pub fn try_schema( input: &RowSchema, columns: &[(String, ColumnIdentity, JoinOutputSource)], aliases: &[(ColumnIdentity, JoinOutputSource)], ) -> ExecResult<RowSchema>

Compile the positional schema of a qualified join without constructing or executing an operator. Binders use this to expose the exact same merged-column identities and hidden qualified aliases as execution.

pub fn try_new( child: Box<dyn PhysicalOperator + 'a>, columns: Vec<(String, ColumnIdentity, JoinOutputSource)>, aliases: Vec<(ColumnIdentity, JoinOutputSource)>, ) -> ExecResult<Self>

Trait Implementations

impl PhysicalOperator for JoinOutput<'_>

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 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 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 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.