Enum parquet::file::properties::EnabledStatistics

pub enum EnabledStatistics {
    None,
    Chunk,
    Page,
}

Controls the level of statistics to be computed by the writer and stored in the parquet file.

Enabling statistics makes the resulting Parquet file larger and requires more time to read the parquet footer.

Statistics can be used to improve query performance by pruning row groups and pages during query execution if the query engine supports evaluating the predicate using the statistics.

Variants

None

Compute no statistics.

Chunk

Compute column chunk-level statistics but not page-level.

Setting this option will store one set of statistics for each relevant column for each row group. The more row groups written, the more statistics will be stored.

Page

Compute page-level and column chunk-level statistics.

Setting this option will store one set of statistics for each relevant column for each page and row group. The more row groups and the more pages written, the more statistics will be stored.

Trait Implementations

impl Clone for EnabledStatistics

fn clone(&self) -> EnabledStatistics

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for EnabledStatistics

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

Formats the value using the given formatter.

impl Default for EnabledStatistics

fn default() -> Self

Returns the “default value” for a type.

impl FromStr for EnabledStatistics

type Err = String

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl PartialEq for EnabledStatistics

fn eq(&self, other: &EnabledStatistics) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for EnabledStatistics

impl Eq for EnabledStatistics

impl StructuralPartialEq for EnabledStatistics