Enum mentat::query::QueryResults

pub enum QueryResults {
    Scalar(Option<Binding>),
    Tuple(Option<Vec<Binding>>),
    Coll(Vec<Binding>),
    Rel(RelResult<Binding>),
}

Variants

Scalar(Option<Binding>)Tuple(Option<Vec<Binding>>)Coll(Vec<Binding>)Rel(RelResult<Binding>)

Methods

impl QueryResults

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn into_scalar(self) -> Result<Option<Binding>, ProjectorError>

pub fn into_coll(self) -> Result<Vec<Binding>, ProjectorError>

pub fn into_tuple(self) -> Result<Option<Vec<Binding>>, ProjectorError>

pub fn into_rel(self) -> Result<RelResult<Binding>, ProjectorError>

Trait Implementations

impl Clone for QueryResults

fn clone(&self) -> QueryResults

Returns a copy of the value.

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

Performs copy-assignment from source.

impl From<QueryOutput> for QueryResults

fn from(o: QueryOutput) -> QueryResults

Performs the conversion.

impl Eq for QueryResults

impl PartialEq<QueryResults> for QueryResults

fn eq(&self, __arg_0: &QueryResults) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &QueryResults) -> bool

This method tests for !=.

impl Debug for QueryResults

fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.