Struct MaskCursor 

pub struct MaskCursor {
    mask: BooleanBuffer,
    position: usize,
}

Cursor for iterating a mask-backed RowSelection

This is best for dense selections where there are many small skips or selections. For example, selecting every other row.

Fields

mask: BooleanBuffer

position: usize

Current absolute offset into the selection

Implementations

impl MaskCursor

pub fn is_empty(&self) -> bool

Returns true when no further rows remain

pub fn next_mask_chunk(&mut self, batch_size: usize) -> Option<MaskChunk>

Advance through the mask representation, producing the next chunk summary

pub fn mask_values_for( &self, chunk: &MaskChunk, ) -> Result<BooleanArray, ParquetError>

Materialise the boolean values for a mask-backed chunk

Trait Implementations

impl Debug for MaskCursor

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

Formats the value using the given formatter.