Function physical_name

datafusion/expr/src/expr.rs:3746–3752

The name of the column (field) that this `Expr` will produce in the physical plan. The difference from [Expr::schema_name] is that top-level columns are unqualified.

(expr: &Expr)

/// The name of the column (field) that this `Expr` will produce in the physical plan.
/// The difference from [Expr::schema_name] is that top-level columns are unqualified.
pub fn physical_name(expr: &Expr) -> Result<String> {
    match expr {
        Expr::Column(col) => Ok(col.name.clone()),
        Expr::Alias(alias) => Ok(alias.name.clone()),
        _ => Ok(expr.schema_name().to_string()),
    }
}

#[cfg(test)]
mod test {