Struct WindowFrameStateRange 

pub struct WindowFrameStateRange {
    sort_options: Vec<SortOptions>,
}

This structure encapsulates all the state information we require as we scan ranges of data while processing RANGE frames. Attribute sort_options stores the column ordering specified by the ORDER BY clause. This information is used to calculate the range.

Fields

sort_options: Vec<SortOptions>

Implementations

impl WindowFrameStateRange

fn new(sort_options: Vec<SortOptions>) -> Self

Create a new object to store the search state.

fn calculate_range( &mut self, window_frame: &Arc<WindowFrame>, last_range: &Range<usize>, range_columns: &[ArrayRef], length: usize, idx: usize, ) -> Result<Range<usize>>

This function calculates beginning/ending indices for the frame of the current row.

fn calculate_index_of_row<const SIDE: bool, const SEARCH_SIDE: bool>( &mut self, range_columns: &[ArrayRef], last_range: &Range<usize>, idx: usize, delta: Option<&ScalarValue>, length: usize, ) -> Result<usize>

This function does the heavy lifting when finding range boundaries. It is meant to be called twice, in succession, to get window frame start and end indices (with SIDE supplied as true and false, respectively).

Trait Implementations

impl Clone for WindowFrameStateRange

fn clone(&self) -> WindowFrameStateRange

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for WindowFrameStateRange

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for WindowFrameStateRange

fn default() -> WindowFrameStateRange

Returns the “default value” for a type.