Struct SparseVector

pub struct SparseVector { /* private fields */ }

A sparse vector.

Implementations

impl SparseVector

pub fn from_dense(vec: &[f32]) -> SparseVector

Creates a sparse vector from a dense vector.

pub fn from_map<'a, I>(map: I, dim: i32) -> SparseVector

where I: IntoIterator<Item = (&'a i32, &'a f32)>,

Creates a sparse vector from a map of non-zero elements.

pub fn dimensions(&self) -> i32

Returns the number of dimensions.

pub fn indices(&self) -> &[i32]

Returns the non-zero indices.

pub fn values(&self) -> &[f32]

Returns the non-zero values.

pub fn to_vec(&self) -> Vec<f32>

Returns the sparse vector as a Vec<f32>.

Trait Implementations

impl Clone for SparseVector

fn clone(&self) -> SparseVector

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SparseVector

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

Formats the value using the given formatter.

impl<'a> FromSql<'a> for SparseVector

fn from_sql( _ty: &Type, raw: &'a [u8], ) -> Result<SparseVector, Box<dyn Error + Send + Sync>>

Creates a new value of this type from a buffer of data of the specified Postgres Type in its binary format.

fn accepts(ty: &Type) -> bool

Determines if a value of this type can be created from the specified Postgres Type.

fn from_sql_null(ty: &Type) -> Result<Self, Box<dyn Error + Send + Sync>>

Creates a new value of this type from a NULL SQL value.

fn from_sql_nullable( ty: &Type, raw: Option<&'a [u8]>, ) -> Result<Self, Box<dyn Error + Send + Sync>>

A convenience function that delegates to from_sql and from_sql_null depending on the value of raw.

impl PartialEq for SparseVector

fn eq(&self, other: &SparseVector) -> 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<'r, 'a> Produce<'r, SparseVector> for PostgresBinarySourcePartitionParser<'a>

type Error = PostgresSourceError

fn produce(&'r mut self) -> Result<SparseVector, PostgresSourceError>

impl<'r> Produce<'r, SparseVector> for PostgresCSVSourceParser<'_>

type Error = PostgresSourceError

fn produce(&'r mut self) -> Result<SparseVector, PostgresSourceError>

impl<'r, 'a> Produce<'r, SparseVector> for PostgresRawSourceParser<'a>

type Error = PostgresSourceError

fn produce(&'r mut self) -> Result<SparseVector, PostgresSourceError>

impl<'r> Produce<'r, SparseVector> for PostgresSimpleSourceParser

type Error = PostgresSourceError

fn produce(&'r mut self) -> Result<SparseVector, PostgresSourceError>

impl ToSql for SparseVector

fn to_sql( &self, _ty: &Type, w: &mut BytesMut, ) -> Result<IsNull, Box<dyn Error + Send + Sync>>

Converts the value of self into the binary format of the specified Postgres Type, appending it to out.

fn accepts(ty: &Type) -> bool

Determines if a value of this type can be converted to the specified Postgres Type.

fn to_sql_checked( &self, ty: &Type, out: &mut BytesMut, ) -> Result<IsNull, Box<dyn Error + Send + Sync>>

An adaptor method used internally by Rust-Postgres.

fn encode_format(&self, _ty: &Type) -> Format

Specify the encode format

impl<P, C> TypeConversion<SparseVector, Vec<Option<f32>>> for PostgresArrowTransport<P, C>

fn convert(val: SparseVector) -> Vec<Option<f32>>

impl<P, C> TypeConversion<SparseVector, Vec<Option<f32>>> for PostgresArrowTransport<P, C>

fn convert(val: SparseVector) -> Vec<Option<f32>>

impl StructuralPartialEq for SparseVector