Struct datafusion_expr::window_state::WindowFrameStateGroups

pub struct WindowFrameStateGroups {
    pub group_end_indices: VecDeque<(Vec<ScalarValue>, usize)>,
    pub current_group_idx: usize,
}

This structure encapsulates all the state information we require as we scan groups of data while processing window frames.

Fields

group_end_indices: VecDeque<(Vec<ScalarValue>, usize)>

A tuple containing group values and the row index where the group ends. Example: [[1, 1], [1, 1], [2, 1], [2, 1], …] would correspond to [([1, 1], 2), ([2, 1], 4), …].

current_group_idx: usize

The group index to which the row index belongs.

Trait Implementations

impl Debug for WindowFrameStateGroups

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

Formats the value using the given formatter.

impl Default for WindowFrameStateGroups

fn default() -> WindowFrameStateGroups

Returns the “default value” for a type.