Function min_of_bounds

datafusion/expr-common/src/interval_arithmetic.rs:1355–1361

Returns the lesser of the given interval bounds. Assumes that a `NULL` value represents `INF`.

(first: &ScalarValue, second: &ScalarValue)

/// Returns the lesser of the given interval bounds. Assumes that a `NULL`
/// value represents `INF`.
fn min_of_bounds(first: &ScalarValue, second: &ScalarValue) -> ScalarValue {
    if !first.is_null() && (second.is_null() || first <= second) {
        first.clone()
    } else {
        second.clone()
    }
}

/// This function updates the given intervals by enforcing (i.e. propagating)
/// the inequality `left > right` (or the `left >= right` inequality, if `strict`