Struct Page

pub struct Page {
    pub buffer_offsets: Vec<u64>,
    pub buffer_sizes: Vec<u64>,
    pub length: u64,
    pub encoding: Option<Encoding>,
    pub priority: u64,
}

This describes a page of column data.

Fields

buffer_offsets: Vec<u64>

The file offsets for each of the page buffers

The number of buffers is variable and depends on the encoding. There may be zero buffers (e.g. constant encoded data) in which case this could be empty.

buffer_sizes: Vec<u64>

The size (in bytes) of each of the page buffers

This field will have the same length as buffer_offsets and may be empty.

length: u64

Logical length (e.g. # rows) of the page

encoding: Option<Encoding>

The encoding used to encode the page

priority: u64

The priority of the page

For tabular data this will be the top-level row number of the first row in the page (and top-level rows should not split across pages).

Trait Implementations

impl Clone for Page

fn clone(&self) -> Page

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Page

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

Formats the value using the given formatter.

impl Default for Page

fn default() -> Self

Returns the “default value” for a type.

impl Message for Page

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for Page

fn eq(&self, other: &Page) -> 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 StructuralPartialEq for Page