Skip to main content

MergeOperator

grafeo_core::execution::operators

Struct MergeOperator 

Source 
pub struct MergeOperator { /* private fields */ }
Expand description

Merge operator for MERGE clause.

Tries to match a node with the given labels and properties. If found, returns the existing node. If not found, creates a new node.

Implementations§

Source§

impl MergeOperator

Source

pub fn new( store: Arc<LpgStore>, variable: String, labels: Vec<String>, match_properties: Vec<(String, Value)>, on_create_properties: Vec<(String, Value)>, on_match_properties: Vec<(String, Value)>, ) -> Self

Creates a new merge operator.

Source

pub fn variable(&self) -> &str

Returns the variable name for the merged node.

Trait Implementations§

Source§

impl Operator for MergeOperator

Source§

fn next(&mut self) -> OperatorResult

Returns the next chunk of data, or None if exhausted.
Source§

fn reset(&mut self)

Resets the operator to its initial state.
Source§

fn name(&self) -> &'static str

Returns the name of this operator for debugging.

Auto Trait Implementations§

Blanket Implementations§

Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source§

impl<T> Pointable for T

Source§

const ALIGN: usize

The alignment of pointer.
Source§

type Init = T

The type for initializers.
Source§

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
Source§

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
Source§

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
Source§

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = Infallible

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
Source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.