Struct Query 

pub struct Query { /* private fields */ }

A parsed SPARQL query.

use rdf_fusion_execution::sparql::Query;
use rdf_fusion_model::NamedNode;

let query_str = "SELECT ?s ?p ?o WHERE { ?s ?p ?o . }";
let mut query = Query::parse(query_str, None)?;

assert_eq!(query.to_string(), query_str);

// We edit the query dataset specification
let default = vec![NamedNode::new("http://example.com")?.into()];
query.dataset_mut().set_default_graph(default.clone());
assert_eq!(
    query.dataset().default_graph_graphs(),
    Some(default.as_slice())
);

Implementations

impl Query

pub fn parse( query: &str, base_iri: Option<&str>, ) -> Result<Self, SparqlSyntaxError>

Parses a SPARQL query with an optional base IRI to resolve relative IRIs in the query.

pub fn dataset(&self) -> &QueryDataset

Returns the query dataset specification

pub fn dataset_mut(&mut self) -> &mut QueryDataset

Returns the query dataset specification

Trait Implementations

impl Clone for Query

fn clone(&self) -> Query

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Query

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

Formats the value using the given formatter.

impl Display for Query

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

Formats the value using the given formatter.

impl From<Query> for Query

fn from(query: Query) -> Self

Converts to this type from the input type.

impl FromStr for Query

type Err = SparqlSyntaxError

The associated error which can be returned from parsing.

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

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

impl Hash for Query

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

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Query

fn eq(&self, other: &Query) -> 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 TryFrom<&String> for Query

type Error = SparqlSyntaxError

The type returned in the event of a conversion error.

fn try_from(query: &String) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<&str> for Query

type Error = SparqlSyntaxError

The type returned in the event of a conversion error.

fn try_from(query: &str) -> Result<Self, Self::Error>

Performs the conversion.

impl Eq for Query

impl StructuralPartialEq for Query