Struct TripleQueryRequest 

pub struct TripleQueryRequest {
    pub graph: String,
    pub subject: String,
    pub predicate: String,
    pub object: Option<TripleObject>,
    pub as_of: u64,
    pub limit: u32,
}

A single bound/unbound triple pattern. Any of subject/predicate/object may be left empty (unbound, a variable); the gateway selects the SPO/POS/OSP index whose leading columns are bound and prefix-scans it.

Fields

graph: String

triple graph name → CF t:{graph}

subject: String

Leave empty/unset to make a position UNBOUND (a ? variable). A bound subject/predicate is interned through the dictionary; an unbound object is signalled by leaving object unset.

bound subject term (empty ⇒ unbound)

predicate: String

bound predicate term (empty ⇒ unbound)

object: Option<TripleObject>

bound object (unset ⇒ unbound)

as_of: u64

Optional point-in-time filter: keep only triples whose validity window [valid_from, valid_to) contains as_of. 0 disables the filter and returns the newest version of every (s,p,o).

limit: u32

Cap on returned triples (0 ⇒ a server default). Newest-first by valid_from.

Trait Implementations

impl Clone for TripleQueryRequest

fn clone(&self) -> TripleQueryRequest

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TripleQueryRequest

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

Formats the value using the given formatter.

impl Default for TripleQueryRequest

fn default() -> Self

Returns the “default value” for a type.

impl Message for TripleQueryRequest

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for TripleQueryRequest

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TripleQueryRequest