Enum QuadStorageEncoding 

pub enum QuadStorageEncoding {
    PlainTerm,
    ObjectId(ObjectIdEncoding),
}

Defines which encoding is used for retrieving quads from the storage.

Defining this is necessary such that the query planner knows what type should be assigned to the schema of quad pattern logical nodes.

Variants

PlainTerm

Uses the plain term encoding.

Currently, the plain term encoding is not parameterizable. Therefore, this variant has no further information.

ObjectId(ObjectIdEncoding)

Uses the provided object id encoding.

Implementations

impl QuadStorageEncoding

pub fn term_type(&self) -> DataType

Returns the data type of a single term column, given the current encoding.

pub fn quad_schema(&self) -> Arc<DFSchema>

Returns the schema of an entire quad, given the current encoding.

pub fn object_id_encoding(&self) -> Option<&ObjectIdEncoding>

Returns an optional reference to the contained ObjectIdEncoding.

Returns None otherwise.

Trait Implementations

impl Clone for QuadStorageEncoding

fn clone(&self) -> QuadStorageEncoding

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QuadStorageEncoding

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

Formats the value using the given formatter.

impl Hash for QuadStorageEncoding

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

where __H: Hasher,

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 QuadStorageEncoding

fn eq(&self, other: &QuadStorageEncoding) -> 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 Eq for QuadStorageEncoding

impl StructuralPartialEq for QuadStorageEncoding