Struct Relation 

pub struct Relation {
    pub from: Vec<TableName>,
    pub to: Vec<TableName>,
    pub enforced: bool,
    pub lightweight: bool,
}

Fields

from: Vec<TableName>

Contains the tables the relation originates from, if empty then there was no IN clause

to: Vec<TableName>

Contains the tables the relation goes to, if empty then there was no OUT clause

enforced: bool

lightweight: bool

A lightweight relation stores each edge as its two vertex-side adjacency keys alone — no record, no edge-side keys, no index keys. Its edges are synthesized on read from their canonical [in, out] ids, so the table can hold no data beyond id, in and out, and its endpoints must always be enforced (vertex deletion is the only cleanup path).

Implementations

impl Relation

pub fn walk_revisioned_field_names( wire_revision: u16, ) -> &'static [&'static str]

Field names at the given wire revision in declaration order. Returns an empty slice if the revision is unknown. Generated by the revisioned derive.

impl Relation

pub const REVISION: u16 = 3u16

The revision number of this type, as declared via #[revisioned(revision = N)].

Trait Implementations

impl Clone for Relation

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Relation

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

Formats the value using the given formatter.

impl DeserializeRevisioned for Relation

fn deserialize_revisioned<R: Read>(reader: &mut R) -> Result<Self, Error>

Deserializes a new instance of the struct from the specified reader.

impl Eq for Relation

impl From<Relation> for Relation

fn from(v: Relation) -> Self

Converts to this type from the input type.

impl From<Relation> for Relation

fn from(v: Relation) -> Self

Converts to this type from the input type.

impl Hash for Relation

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

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 Relation

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

Equality operator ==.

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

Inequality operator !=.

impl Revisioned for Relation

fn revision() -> u16

Returns the current revision of this type.

fn type_id() -> TypeId

where Self: 'static,

Returns the type id of this type.

impl SerializeRevisioned for Relation

fn serialize_revisioned<W: Write>(&self, writer: &mut W) -> Result<(), Error>

Serializes the struct using the specified writer.

impl SkipCheckRevisioned for Relation

fn skip_check_revisioned<R: Read>(reader: &mut R) -> Result<(), Error>

impl SkipRevisioned for Relation

fn skip_revisioned<R: Read>(reader: &mut R) -> Result<(), Error>

fn skip_revisioned_slice(reader: &mut SliceReader<'_>) -> Result<(), Error>

Consume through bytes backed by SliceReader without allocating a buffer for bulk segments.

impl StructuralPartialEq for Relation

impl<V: Visitor> Visit<V> for Relation

fn visit(&self, this: &mut V) -> Result<(), V::Error>

impl<V: MutVisitor> VisitMut<V> for Relation

fn visit_mut(&mut self, this: &mut V) -> Result<(), V::Error>

impl WalkRevisioned for Relation

type Walker<'r, R: BorrowedReader + 'r> = RelationWalker<'r, R>

Walker produced by walk_revisioned.

fn walk_revisioned<'r, R: BorrowedReader>( reader: &'r mut R, ) -> Result<Self::Walker<'r, R>, Error>

Read the type’s revision-level prefix and return a walker positioned at the start of the body.