Enum QueryEvaluationError

#[non_exhaustive]
pub enum QueryEvaluationError {
    Dataset(Box<dyn Error + Send + Sync>),
    Service(Box<dyn Error + Send + Sync>),
    NotExistingSubstitutedVariable(Variable),
    UnexpectedDefaultGraph,
    UnboundService,
    InvalidServiceName(Term),
    UnsupportedService(NamedNode),
    InvalidStorageTripleTerm,
}

A SPARQL evaluation error

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Dataset(Box<dyn Error + Send + Sync>)

Error from the underlying RDF dataset

Service(Box<dyn Error + Send + Sync>)

Error during SERVICE evaluation

NotExistingSubstitutedVariable(Variable)

If a variable present in the given initial substitution is not present in the SELECT part of the query

UnexpectedDefaultGraph

Error if the dataset returns the default graph even if a named graph is expected

UnboundService

The variable storing the SERVICE name is unbound

InvalidServiceName(Term)

Invalid service name

UnsupportedService(NamedNode)

The given SERVICE is not supported

InvalidStorageTripleTerm

Trait Implementations

impl Debug for QueryEvaluationError

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

Formats the value using the given formatter.

impl Display for QueryEvaluationError

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

Formats the value using the given formatter.

impl Error for QueryEvaluationError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Infallible> for QueryEvaluationError

fn from(error: Infallible) -> Self

Converts to this type from the input type.