datafusion_python::datafusion_expr::window_state

Struct WindowAggState

pub struct WindowAggState {
    pub window_frame_range: Range<usize>,
    pub window_frame_ctx: Option<WindowFrameContext>,
    pub last_calculated_index: usize,
    pub offset_pruned_rows: usize,
    pub out_col: Arc<dyn Array>,
    pub n_row_result_missing: usize,
    pub is_end: bool,
}

Expand description

Holds the state of evaluating a window function

Fields§

§window_frame_range: Range<usize>

The range that we calculate the window function

§window_frame_ctx: Option<WindowFrameContext>§last_calculated_index: usize

The index of the last row that its result is calculated inside the partition record batch buffer.

§offset_pruned_rows: usize

The offset of the deleted row number

§out_col: Arc<dyn Array>

Stores the results calculated by window frame

§n_row_result_missing: usize

Keeps track of how many rows should be generated to be in sync with input record_batch.

§is_end: bool

Flag indicating whether we have received all data for this partition

Implementations§

impl WindowAggState

pub fn prune_state(&mut self, n_prune: usize)

pub fn update( &mut self, out_col: &Arc<dyn Array>, partition_batch_state: &PartitionBatchState, ) -> Result<(), DataFusionError>

pub fn new(out_type: &DataType) -> Result<WindowAggState, DataFusionError>

Trait Implementations§

impl Debug for WindowAggState

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

impl Freeze for WindowAggState

impl !RefUnwindSafe for WindowAggState

impl Send for WindowAggState

impl Sync for WindowAggState

impl Unpin for WindowAggState

impl !UnwindSafe for WindowAggState

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