Struct parquet2::statistics::ParquetStatistics

pub struct ParquetStatistics {
    pub max: Option<Vec<u8, Global>>,
    pub min: Option<Vec<u8, Global>>,
    pub null_count: Option<i64>,
    pub distinct_count: Option<i64>,
    pub max_value: Option<Vec<u8, Global>>,
    pub min_value: Option<Vec<u8, Global>>,
}

Statistics per row group and per page All fields are optional.

Fields

max: Option<Vec<u8, Global>>

DEPRECATED: min and max value of the column. Use min_value and max_value.

Values are encoded using PLAIN encoding, except that variable-length byte arrays do not include a length prefix.

These fields encode min and max values determined by signed comparison only. New files should use the correct order for a column’s logical type and store the values in the min_value and max_value fields.

To support older readers, these may be set when the column order is signed.

min: Option<Vec<u8, Global>>

null_count: Option<i64>

count of null value in the column

distinct_count: Option<i64>

count of distinct values occurring

max_value: Option<Vec<u8, Global>>

Min and max values for the column, determined by its ColumnOrder.

Values are encoded using PLAIN encoding, except that variable-length byte arrays do not include a length prefix.

min_value: Option<Vec<u8, Global>>

Implementations

impl Statistics

pub fn new<F1, F2, F3, F4, F5, F6>(
    max: F1,
    min: F2,
    null_count: F3,
    distinct_count: F4,
    max_value: F5,
    min_value: F6
) -> Statistics where
    F1: Into<Option<Vec<u8, Global>>>,
    F2: Into<Option<Vec<u8, Global>>>,
    F3: Into<Option<i64>>,
    F4: Into<Option<i64>>,
    F5: Into<Option<Vec<u8, Global>>>,
    F6: Into<Option<Vec<u8, Global>>>, 

pub fn read_from_in_protocol(
    i_prot: &mut dyn TInputProtocol
) -> Result<Statistics, Error>

pub async fn stream_from_in_protocol(
    i_prot: &'_ mut (dyn TInputStreamProtocol + '_)
) -> Result<Statistics, Error>

pub fn write_to_out_protocol(
    &self,
    o_prot: &mut dyn TOutputProtocol
) -> Result<usize, Error>

pub async fn write_to_out_stream_protocol(
    &'_ self,
    o_prot: &'_ mut (dyn TOutputStreamProtocol + '_)
) -> Result<usize, Error>

Trait Implementations

impl Clone for Statistics

fn clone(&self) -> Statistics

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Statistics

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

Formats the value using the given formatter.

impl Default for Statistics

fn default() -> Statistics

Returns the “default value” for a type.

impl Hash for Statistics

fn hash<__H>(&self, state: &mut __H) where
    __H: Hasher, 

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl Ord for Statistics

fn cmp(&self, other: &Statistics) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<Statistics> for Statistics

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl PartialOrd<Statistics> for Statistics

fn partial_cmp(&self, other: &Statistics) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for Statistics

impl StructuralEq for Statistics

impl StructuralPartialEq for Statistics