Method push

datafusion/physical-expr/src/equivalence/class.rs:204–217

Insert the expression into this class, meaning it is known to be equal to all other expressions in this class.

(&mut self, expr: Arc<dyn PhysicalExpr>)

    /// Insert the expression into this class, meaning it is known to be equal to
    /// all other expressions in this class.
    pub fn push(&mut self, expr: Arc<dyn PhysicalExpr>) {
        if let Some(lit) = expr.downcast_ref::<Literal>() {
            let expr_across = AcrossPartitions::Uniform(Some(lit.value().clone()));
            if let Some(across) = self.constant.as_mut() {
                // TODO: Return an error if constant values do not agree.
                if *across == AcrossPartitions::Heterogeneous {
                    *across = expr_across;
                }
            } else {
                self.constant = Some(expr_across);
            }
        }
        self.exprs.insert(expr);
    }

    /// Inserts all the expressions from other into this class.
    pub fn extend(&mut self, other: Self) {