Class Exists

datafusion/expr/src/expr.rs:1277–1282

/// EXISTS expression
#[derive(Clone, PartialEq, Eq, PartialOrd, Hash, Debug)]
pub struct Exists {
    /// Subquery that will produce a single column of data
    pub subquery: Subquery,
    /// Whether the expression is negated
    pub negated: bool,
}

impl Exists {
    // Create a new Exists expression.