Function datafusion_physical_expr::equivalence::calculate_union

pub fn calculate_union(
    eqps: Vec<EquivalenceProperties>,
    schema: SchemaRef,
) -> Result<EquivalenceProperties>

Calculates the union (in the sense of UnionExec) EquivalenceProperties of the given EquivalenceProperties in eqps according to the given output schema (which need not be the same with those of lhs and rhs as details such as nullability may be different).