Struct ReadOptionsBuilder 

pub struct ReadOptionsBuilder {
    predicates: Vec<ReadGroupPredicate>,
    enable_page_index: bool,
    props: Option<ReaderProperties>,
    metadata_options: ParquetMetaDataOptions,
}

A builder for ReadOptions. For the predicates that are added to the builder, they will be chained using ‘AND’ to filter the row groups.

Fields

predicates: Vec<ReadGroupPredicate>

enable_page_index: bool

props: Option<ReaderProperties>

metadata_options: ParquetMetaDataOptions

Implementations

impl ReadOptionsBuilder

pub fn new() -> Self

New builder

pub fn with_predicate(self, predicate: ReadGroupPredicate) -> Self

Add a predicate on row group metadata to the reading option, Filter only row groups that match the predicate criteria

pub fn with_range(self, start: i64, end: i64) -> Self

Add a range predicate on filtering row groups if their midpoints are within the Closed-Open range [start..end) {x | start <= x < end}

pub fn with_page_index(self) -> Self

Enable reading the page index structures described in “Column Index Layout to Support Page Skipping”

pub fn with_reader_properties(self, properties: ReaderProperties) -> Self

Set the ReaderProperties configuration.

pub fn with_parquet_schema(self, schema: SchemaDescPtr) -> Self

Provide a Parquet schema to use when decoding the metadata. The schema in the Parquet footer will be skipped.

pub fn with_encoding_stats_as_mask(self, val: bool) -> Self

Set whether to convert the encoding_stats in the Parquet ColumnMetaData to a bitmask (defaults to false).

See ColumnChunkMetaData::page_encoding_stats_mask for an explanation of why this might be desirable.

pub fn with_encoding_stats_policy(self, policy: ParquetStatisticsPolicy) -> Self

Sets the decoding policy for encoding_stats in the Parquet ColumnMetaData.

pub fn build(self) -> ReadOptions

Seal the builder and return the read options

Trait Implementations

impl Default for ReadOptionsBuilder

fn default() -> ReadOptionsBuilder

Returns the “default value” for a type.