Function exists

datafusion/expr/src/expr_fn.rs:251–261

Create an EXISTS subquery expression

(subquery: Arc<LogicalPlan>)

/// Create an EXISTS subquery expression
pub fn exists(subquery: Arc<LogicalPlan>) -> Expr {
    let outer_ref_columns = subquery.all_out_ref_exprs();
    Expr::Exists(Exists {
        subquery: Subquery {
            subquery,
            outer_ref_columns,
            spans: Spans::new(),
        },
        negated: false,
    })
}

/// Create a NOT EXISTS subquery expression
pub fn not_exists(subquery: Arc<LogicalPlan>) -> Expr {