Class Subquery

datafusion/expr/src/logical_plan/plan.rs:4088–4095

/// Subquery
#[derive(Clone, PartialEq, Eq, PartialOrd, Hash)]
pub struct Subquery {
    /// The subquery
    pub subquery: Arc<LogicalPlan>,
    /// The outer references used in the subquery
    pub outer_ref_columns: Vec<Expr>,
    /// Span information for subquery projection columns
    pub spans: Spans,
}

impl Normalizeable for Subquery {
    fn can_normalize(&self) -> bool {