Struct parquet2::page::DataPageHeaderV2

pub struct DataPageHeaderV2 {
    pub num_values: i32,
    pub num_nulls: i32,
    pub num_rows: i32,
    pub encoding: Encoding,
    pub definition_levels_byte_length: i32,
    pub repetition_levels_byte_length: i32,
    pub is_compressed: Option<bool>,
    pub statistics: Option<Statistics>,
}

New page format allowing reading levels without decompressing the data Repetition and definition levels are uncompressed The remaining section containing the data is compressed if is_compressed is true

Fields

num_values: i32

Number of values, including NULLs, in this data page. *

num_nulls: i32

Number of NULL values, in this data page. Number of non-null = num_values - num_nulls which is also the number of values in the data section *

num_rows: i32

Number of rows in this data page. which means pages change on record boundaries (r = 0) *

encoding: Encoding

Encoding used for data in this page *

definition_levels_byte_length: i32

length of the definition levels

repetition_levels_byte_length: i32

length of the repetition levels

is_compressed: Option<bool>

whether the values are compressed. Which means the section of the page between definition_levels_byte_length + repetition_levels_byte_length + 1 and compressed_page_size (included) is compressed with the compression_codec. If missing it is considered compressed

statistics: Option<Statistics>

optional statistics for the data in this page *

Implementations

impl DataPageHeaderV2

pub fn new<F7, F8>(
    num_values: i32,
    num_nulls: i32,
    num_rows: i32,
    encoding: Encoding,
    definition_levels_byte_length: i32,
    repetition_levels_byte_length: i32,
    is_compressed: F7,
    statistics: F8
) -> DataPageHeaderV2 where
    F7: Into<Option<bool>>,
    F8: Into<Option<Statistics>>, 

pub fn read_from_in_protocol<T>(
    i_prot: &mut T
) -> Result<DataPageHeaderV2, Error> where
    T: TInputProtocol, 

pub async fn stream_from_in_protocol(
    i_prot: &'_ mut (dyn TInputStreamProtocol + '_)
) -> Result<DataPageHeaderV2, Error>

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

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

Trait Implementations

impl Clone for DataPageHeaderV2

fn clone(&self) -> DataPageHeaderV2

Returns a copy of the value.

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

Performs copy-assignment from source.

impl DataPageHeaderExt for DataPageHeaderV2

fn encoding(&self) -> Encoding

fn repetition_level_encoding(&self) -> Encoding

fn definition_level_encoding(&self) -> Encoding

impl Debug for DataPageHeaderV2

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

Formats the value using the given formatter.

impl Hash for DataPageHeaderV2

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 DataPageHeaderV2

fn cmp(&self, other: &DataPageHeaderV2) -> 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<DataPageHeaderV2> for DataPageHeaderV2

fn eq(&self, other: &DataPageHeaderV2) -> bool

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

fn ne(&self, other: &DataPageHeaderV2) -> bool

This method tests for !=.

impl PartialOrd<DataPageHeaderV2> for DataPageHeaderV2

fn partial_cmp(&self, other: &DataPageHeaderV2) -> 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 DataPageHeaderV2

impl StructuralEq for DataPageHeaderV2

impl StructuralPartialEq for DataPageHeaderV2