pub struct QueryDataset { /* private fields */ }
Expand description
A SPARQL query dataset specification
Implementations§
Source§impl QueryDataset
impl QueryDataset
Sourcepub fn is_default_dataset(&self) -> bool
pub fn is_default_dataset(&self) -> bool
Checks if this dataset specification is the default one (i.e. the default graph is the store default graph and all the store named graphs are available)
use oxigraph::sparql::Query;
assert!(Query::parse("SELECT ?s ?p ?o WHERE { ?s ?p ?o . }", None)?
.dataset()
.is_default_dataset());
assert!(!Query::parse(
"SELECT ?s ?p ?o FROM <http://example.com> WHERE { ?s ?p ?o . }",
None
)?
.dataset()
.is_default_dataset());
Sourcepub fn default_graph_graphs(&self) -> Option<&[GraphName]>
pub fn default_graph_graphs(&self) -> Option<&[GraphName]>
Returns the list of the store graphs that are available to the query as the default graph or None
if the union of all graphs is used as the default graph
This list is by default only the store default graph
Sourcepub fn set_default_graph_as_union(&mut self)
pub fn set_default_graph_as_union(&mut self)
Sets if the default graph for the query should be the union of all the graphs in the queried store
Sourcepub fn set_default_graph(&mut self, graphs: Vec<GraphName>)
pub fn set_default_graph(&mut self, graphs: Vec<GraphName>)
Sets the list of graphs the query should consider as being part of the default graph.
By default only the store default graph is considered.
use oxigraph::model::NamedNode;
use oxigraph::sparql::Query;
let mut query = Query::parse("SELECT ?s ?p ?o WHERE { ?s ?p ?o . }", None)?;
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())
);
Sourcepub fn available_named_graphs(&self) -> Option<&[NamedOrBlankNode]>
pub fn available_named_graphs(&self) -> Option<&[NamedOrBlankNode]>
Returns the list of the available named graphs for the query or None
if all graphs are available
Sourcepub fn set_available_named_graphs(
&mut self,
named_graphs: Vec<NamedOrBlankNode>,
)
pub fn set_available_named_graphs( &mut self, named_graphs: Vec<NamedOrBlankNode>, )
Sets the list of allowed named graphs in the query.
use oxigraph::model::NamedNode;
use oxigraph::sparql::Query;
let mut query = Query::parse("SELECT ?s ?p ?o WHERE { ?s ?p ?o . }", None)?;
let named = vec![NamedNode::new("http://example.com")?.into()];
query
.dataset_mut()
.set_available_named_graphs(named.clone());
assert_eq!(
query.dataset().available_named_graphs(),
Some(named.as_slice())
);
Trait Implementations§
Source§impl Clone for QueryDataset
impl Clone for QueryDataset
Source§fn clone(&self) -> QueryDataset
fn clone(&self) -> QueryDataset
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read more