Function iter_conjunction

datafusion/expr/src/utils.rs:1044–1063

Iterate parts in a conjunctive [`Expr`] such as `A AND B AND C` => `[A, B, C]` See [`split_conjunction_owned`] for more details and an example.

(expr: &Expr)

///
/// See [`split_conjunction_owned`] for more details and an example.
pub fn iter_conjunction(expr: &Expr) -> impl Iterator<Item = &Expr> {
    let mut stack = vec![expr];
    std::iter::from_fn(move || {
        while let Some(expr) = stack.pop() {
            match expr {
                Expr::BinaryExpr(BinaryExpr {
                    right,
                    op: Operator::And,
                    left,
                }) => {
                    stack.push(right);
                    stack.push(left);
                }
                Expr::Alias(Alias { expr, .. }) => stack.push(expr),
                other => return Some(other),
            }
        }
        None
    })
}

/// Iterate parts in a conjunctive [`Expr`] such as `A AND B AND C` => `[A, B, C]`
///