Trait MutationEngine 

pub trait MutationEngine {
    type Error: Error + Send + Sync + 'static;

    // Required methods
    fn create_node(
        &mut self,
        labels: &[String],
        props: HashMap<String, Value>,
    ) -> Result<u64, Self::Error>;
    fn create_rel(
        &mut self,
        src: u64,
        dst: u64,
        rel_type: &str,
        props: HashMap<String, Value>,
    ) -> Result<u64, Self::Error>;
    fn merge_pattern(
        &mut self,
        pattern: &Expr,
        on_create_props: &Expr,
        on_match_props: &Expr,
        schema: &[ColDef],
        row: &Row,
    ) -> Result<(), Self::Error>;
    fn delete_entity(
        &mut self,
        target: &Value,
        detach: bool,
    ) -> Result<(), Self::Error>;
    fn set_property(
        &mut self,
        target: &Value,
        key: &str,
        value: Value,
    ) -> Result<(), Self::Error>;
    fn remove_property(
        &mut self,
        target: &Value,
        key: &str,
    ) -> Result<(), Self::Error>;
}

Optional mutation capability for engines that execute DML ops.

Required Associated Types

type Error: Error + Send + Sync + 'static

Required Methods

fn create_node( &mut self, labels: &[String], props: HashMap<String, Value>, ) -> Result<u64, Self::Error>

fn create_rel( &mut self, src: u64, dst: u64, rel_type: &str, props: HashMap<String, Value>, ) -> Result<u64, Self::Error>

fn merge_pattern( &mut self, pattern: &Expr, on_create_props: &Expr, on_match_props: &Expr, schema: &[ColDef], row: &Row, ) -> Result<(), Self::Error>

fn delete_entity( &mut self, target: &Value, detach: bool, ) -> Result<(), Self::Error>

fn set_property( &mut self, target: &Value, key: &str, value: Value, ) -> Result<(), Self::Error>

fn remove_property( &mut self, target: &Value, key: &str, ) -> Result<(), Self::Error>

Implementors

impl MutationEngine for InMemoryEngine

type Error = ExecutionError