is_end_bound_safe_for_range

datafusion_physical_expr::window::window_expr

Function is_end_bound_safe_for_range 

Source 
fn is_end_bound_safe_for_range(
    end_bound: &WindowFrameBound,
    orderby_col: &ArrayRef,
    most_recent_ob_col: Option<&ArrayRef>,
    sort_options: &SortOptions,
    idx: usize,
) -> Result<bool>
Expand description

For row-based window frames, determines whether the end bound calculation is safe by comparing it against specific values (zero, current row). It uses the is_row_ahead helper function to determine if the current row is ahead of the most recent row based on the ORDER BY column and sorting options.

§Parameters

  • end_bound: Reference to the window frame bound in question.
  • orderby_col: Reference to the column used for ordering.
  • most_recent_ob_col: Optional reference to the most recent order-by column.
  • sort_options: The sorting options used in the window frame.
  • idx: The current index in the window frame.

§Returns

A Result indicating whether the end bound is safe for range-based window frames.