Struct UnionOperator 

pub struct UnionOperator { /* private fields */ }

Union operator that combines results from multiple inputs.

This produces all rows from all inputs, in order. It does not remove duplicates (use DISTINCT after UNION for UNION DISTINCT).

Implementations

impl UnionOperator

pub fn new( inputs: Vec<Box<dyn Operator>>, output_schema: Vec<LogicalType>, ) -> Self

Creates a new union operator.

Arguments

• inputs - The input operators to union.
• output_schema - The schema of the output (should match all inputs).

pub fn output_schema(&self) -> &[LogicalType]

Returns the output schema.

Trait Implementations

impl Operator for UnionOperator

fn next(&mut self) -> OperatorResult

Returns the next chunk of data, or None if exhausted.

fn reset(&mut self)

Resets the operator to its initial state.

fn name(&self) -> &'static str

Returns the name of this operator for debugging.