QueryBuilder

flams_math_archives::triple_store::sparql::spargebra

Enum QueryBuilder 

pub enum QueryBuilder {
    Select {
        dataset: Option<QueryDataset>,
        pattern: GraphPattern,
        base_iri: Option<Iri<String>>,
    },
    Construct {
        template: Vec<TriplePattern>,
        dataset: Option<QueryDataset>,
        pattern: GraphPattern,
        base_iri: Option<Iri<String>>,
    },
    Describe {
        dataset: Option<QueryDataset>,
        pattern: GraphPattern,
        base_iri: Option<Iri<String>>,
    },
    Ask {
        dataset: Option<QueryDataset>,
        pattern: GraphPattern,
        base_iri: Option<Iri<String>>,
    },
}
Available on crate feature rdf only.
Expand description

A parsed SPARQL query.

use spargebra::SparqlParser;

let query_str = "SELECT ?s ?p ?o WHERE { ?s ?p ?o . }";
let query = SparqlParser::new().parse_query(query_str)?;
assert_eq!(query.to_string(), query_str);
assert_eq!(
    query.to_sse(),
    "(project (?s ?p ?o) (bgp (triple ?s ?p ?o)))"
);

Variants§

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Select

SELECT.

Fields

§dataset: Option<QueryDataset>

The query dataset specification.

§pattern: GraphPattern

The query selection graph pattern.

§base_iri: Option<Iri<String>>

The query base IRI.

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Construct

CONSTRUCT.

Fields

§template: Vec<TriplePattern>

The query construction template.

§dataset: Option<QueryDataset>

The query dataset specification.

§pattern: GraphPattern

The query selection graph pattern.

§base_iri: Option<Iri<String>>

The query base IRI.

§

Describe

DESCRIBE.

Fields

§dataset: Option<QueryDataset>

The query dataset specification.

§pattern: GraphPattern

The query selection graph pattern.

§base_iri: Option<Iri<String>>

The query base IRI.

§

Ask

ASK.

Fields

§dataset: Option<QueryDataset>

The query dataset specification.

§pattern: GraphPattern

The query selection graph pattern.

§base_iri: Option<Iri<String>>

The query base IRI.

Implementations§

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impl Query

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

👎Deprecated since 0.4.0: Use SparqlParser::new().parse_query instead

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

pub fn dataset(&self) -> Option<&QueryDataset>

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

pub fn base_iri(&self) -> Option<&Iri<String>>

pub fn to_sse(&self) -> String

Formats using the SPARQL S-Expression syntax.

Trait Implementations§

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impl Clone for Query

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fn clone(&self) -> Query

Returns a duplicate of the value. Read more
1.0.0 · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for Query

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

Formats the value using the given formatter. Read more
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impl Display for Query

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

Formats the value using the given formatter. Read more
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impl From<Query> for Query

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fn from(query: Query) -> Query

Converts to this type from the input type.
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impl FromStr for Query

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type Err = SparqlSyntaxError

The associated error which can be returned from parsing.
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fn from_str(query: &str) -> Result<Query, <Query as FromStr>::Err>

Parses a string s to return a value of this type. Read more
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impl Hash for Query

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

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

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

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for Query

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl TryFrom<&String> for Query

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type Error = SparqlSyntaxError

The type returned in the event of a conversion error.
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fn try_from(query: &String) -> Result<Query, <Query as TryFrom<&String>>::Error>

Performs the conversion.
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impl TryFrom<&str> for Query

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type Error = SparqlSyntaxError

The type returned in the event of a conversion error.
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fn try_from(query: &str) -> Result<Query, <Query as TryFrom<&str>>::Error>

Performs the conversion.
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impl Eq for Query

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impl StructuralPartialEq for Query

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