Method free_range

datafusion/expr/src/window_frame.rs:285–290

Returns whether the window frame is "free range"; i.e. its start/end bounds are UNBOUNDED or CURRENT ROW.

(&self)

    /// Returns whether the window frame is "free range"; i.e. its start/end
    /// bounds are UNBOUNDED or CURRENT ROW.
    fn free_range(&self) -> bool {
        (self.start_bound.is_unbounded()
            || self.start_bound == WindowFrameBound::CurrentRow)
            && (self.end_bound.is_unbounded()
                || self.end_bound == WindowFrameBound::CurrentRow)
    }

    /// Is the window frame ever-expanding (it always grows in the superset sense).
    /// Useful when understanding if set-monotonicity properties of functions can