Function find_window_expr

datafusion/sql/src/unparser/utils.rs:292–300

(
    windows: &'a [&'a Window],
    column_name: &'a str,
)

}

fn find_window_expr<'a>(
    windows: &'a [&'a Window],
    column_name: &'a str,
) -> Option<&'a Expr> {
    windows
        .iter()
        .flat_map(|w| w.window_expr.iter())
        .find(|expr| expr.schema_name().to_string() == column_name)
}

/// Transforms all Column expressions in a sort expression into the actual expression from aggregation or projection if found.
/// This is required because if an ORDER BY expression is present in an Aggregate or Select, it is replaced