Struct ViewBuffer 

pub struct ViewBuffer {
    pub views: Vec<u128>,
    pub buffers: Vec<Buffer>,
}

A buffer of view type byte arrays that can be converted into GenericByteViewArray

Note this does not reuse GenericByteViewBuilder due to the need to call pad_nulls and reuse the existing logic for Vec in the parquet crate

Fields

views: Vec<u128>

buffers: Vec<Buffer>

Implementations

impl ViewBuffer

pub fn with_capacity(capacity: usize) -> Self

Create a new ViewBuffer with capacity for the specified number of views

pub fn is_empty(&self) -> bool

pub fn append_block(&mut self, block: Buffer) -> u32

pub fn into_array( self, null_buffer: Option<Buffer>, data_type: &ArrowType, ) -> ArrayRef

Converts this into an [ArrayRef] with the provided data_type and null_buffer

Trait Implementations

impl Debug for ViewBuffer

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

Formats the value using the given formatter.

impl Default for ViewBuffer

fn default() -> ViewBuffer

Returns the “default value” for a type.

impl ValuesBuffer for ViewBuffer

fn with_capacity(capacity: usize) -> Self

Create a new buffer with capacity for at least capacity elements

fn pad_nulls( &mut self, read_offset: usize, values_read: usize, levels_read: usize, valid_mask: &[u8], )

If a column contains nulls, more level data may be read than value data, as null values are not encoded. Therefore, first the levels data is read, the null count determined, and then the corresponding number of values read to a ValuesBuffer.