Class Alias

datafusion/expr/src/expr.rs:695–700

/// Alias expression
#[derive(Clone, PartialEq, Eq, Debug)]
pub struct Alias {
    pub expr: Box<Expr>,
    pub relation: Option<TableReference>,
    pub name: String,
    pub metadata: Option<FieldMetadata>,
}

impl Hash for Alias {
    fn hash<H: Hasher>(&self, state: &mut H) {