Enum ParquetStatisticsPolicy 

pub enum ParquetStatisticsPolicy {
    KeepAll,
    SkipAll,
    SkipExcept(Arc<HashSet<usize>>),
}

Enum to control decoding of some Parquet statistics fields.

Example

use parquet::file::metadata::ParquetStatisticsPolicy;
use parquet::file::serialized_reader::ReadOptionsBuilder;
use parquet::arrow::arrow_reader::ArrowReaderOptions;

// Set arrow options to skip encoding statistics for all columns.
let options =
    ArrowReaderOptions::new().with_encoding_stats_policy(ParquetStatisticsPolicy::SkipAll);

// Set serialized reader options to decode encoding statistics for all columns.
let options =
    ReadOptionsBuilder::new().with_encoding_stats_policy(ParquetStatisticsPolicy::KeepAll)
    .build();

// Set arrow options to skip encoding statistics for all columns, but to decode statistics
// for columns 0 and 1.
let options = ArrowReaderOptions::new()
    .with_encoding_stats_policy(ParquetStatisticsPolicy::skip_except(&[0, 1]));

Variants

KeepAll

Decode the relevant statistics for all columns.

SkipAll

Skip decoding the relevant statistics for all columns.

SkipExcept(Arc<HashSet<usize>>)

Skip decoding the relevant statistics for all columns not in the provided set of column indices.

Implementations

impl ParquetStatisticsPolicy

pub fn skip_except(keep: &[usize]) -> Self

Create a ParquetStatisticsPolicy to skip all columns except those in keep.

If keep is empty, then this returns Self::SkipAll

pub(crate) fn is_skip(&self, col_index: usize) -> bool

Returns whether the policy for the given column index is to skip the statistics.

Trait Implementations

impl Clone for ParquetStatisticsPolicy

fn clone(&self) -> ParquetStatisticsPolicy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ParquetStatisticsPolicy

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

Formats the value using the given formatter.

impl Default for ParquetStatisticsPolicy

fn default() -> ParquetStatisticsPolicy

Returns the “default value” for a type.