DefinitionLevelDecoder

parquet::column::reader::decoder

Trait DefinitionLevelDecoder 

Source 
pub trait DefinitionLevelDecoder: ColumnLevelDecoder {
    // Required methods
    fn read_def_levels(
        &mut self,
        out: &mut Self::Buffer,
        num_levels: usize,
    ) -> Result<(usize, usize)>;
    fn skip_def_levels(&mut self, num_levels: usize) -> Result<(usize, usize)>;
}

Required Methods§

Source

fn read_def_levels( &mut self, out: &mut Self::Buffer, num_levels: usize, ) -> Result<(usize, usize)>

Read up to num_levels definition levels into out.

Returns the number of values read, and the number of levels read.

§Panics

Implementations may panic if range overlaps with already written data

Source

fn skip_def_levels(&mut self, num_levels: usize) -> Result<(usize, usize)>

Skips over num_levels definition levels.

Returns the number of values skipped, and the number of levels skipped.

Implementors§