Struct parquet::record::reader::TreeBuilder

pub struct TreeBuilder { /* fields omitted */ }

Tree builder for Reader enum. Serves as a container of options for building a reader tree and a builder, and accessing a records iterator RowIter.

Methods

impl TreeBuilder

pub fn new() -> Self

Creates new tree builder with default parameters.

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

Sets batch size for this tree builder.

pub fn build(     &self,     descr: SchemaDescPtr,     row_group_reader: &RowGroupReader ) -> Reader

Creates new root reader for provided schema and row group.

Important traits for ReaderIter

impl Iterator for ReaderIter type Item = Row;

pub fn as_iter(     &self,     descr: SchemaDescPtr,     row_group_reader: &RowGroupReader ) -> ReaderIter

Creates iterator of Rows directly from schema descriptor and row group.