Struct AsyncPrefetchBuilder 

pub struct AsyncPrefetchBuilder { /* private fields */ }

Builder for creating async prefetch datasets.

Implementations

impl AsyncPrefetchBuilder

pub fn new() -> Self

Creates a new builder.

pub fn batch_size(self, size: usize) -> Self

Sets the batch size (rows per batch).

pub fn prefetch_size(self, size: usize) -> Self

Sets the prefetch buffer size (number of batches).

pub fn from_parquet( self, path: impl AsRef<Path>, ) -> Result<AsyncPrefetchDataset>

Builds an async prefetch dataset from a Parquet file.

Errors

Returns an error if the file cannot be opened.

pub fn from_source(self, source: Box<dyn DataSource>) -> AsyncPrefetchDataset

Builds an async prefetch dataset from a data source.

Trait Implementations

impl Debug for AsyncPrefetchBuilder

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

Formats the value using the given formatter.

impl Default for AsyncPrefetchBuilder

fn default() -> AsyncPrefetchBuilder

Returns the “default value” for a type.