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

Pulls the next batch of data. Returns None when exhausted.

fn reset(&mut self)

Resets to initial state so you can iterate again.

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

Returns a name for debugging/explain output.