Enum ValueExpression 

pub enum ValueExpression {
    Variable(String),
    Property(PropertyRef),
    Literal(PropertyValue),
    ScalarFunction {
        name: String,
        args: Vec<ValueExpression>,
    },
    AggregateFunction {
        name: String,
        args: Vec<ValueExpression>,
        distinct: bool,
    },
    Arithmetic {
        left: Box<ValueExpression>,
        operator: ArithmeticOperator,
        right: Box<ValueExpression>,
    },
    VectorDistance {
        left: Box<ValueExpression>,
        right: Box<ValueExpression>,
        metric: DistanceMetric,
    },
    VectorSimilarity {
        left: Box<ValueExpression>,
        right: Box<ValueExpression>,
        metric: DistanceMetric,
    },
    Parameter(String),
    VectorLiteral(Vec<f32>),
}

Value expressions (for comparisons and return values)

Variants

Variable(String)

Variable reference

Property(PropertyRef)

Property reference

Literal(PropertyValue)

Literal value

ScalarFunction

Scalar function call (toLower, upper, etc.) These are row-level functions that operate on individual values

Fields

name: String

args: Vec<ValueExpression>

AggregateFunction

Aggregate function call (COUNT, SUM, AVG, MIN, MAX, COLLECT) These functions operate across multiple rows and support DISTINCT

Fields

name: String

args: Vec<ValueExpression>

distinct: bool

Whether DISTINCT keyword was specified (e.g., COUNT(DISTINCT x))

Arithmetic

Arithmetic operation

Fields

left: Box<ValueExpression>

operator: ArithmeticOperator

right: Box<ValueExpression>

VectorDistance

Vector distance function: vector_distance(left, right, metric) Returns the distance as a float (lower = more similar for L2/Cosine)

Fields

left: Box<ValueExpression>

right: Box<ValueExpression>

metric: DistanceMetric

VectorSimilarity

Vector similarity function: vector_similarity(left, right, metric) Returns the similarity score as a float (higher = more similar)

Fields

left: Box<ValueExpression>

right: Box<ValueExpression>

metric: DistanceMetric

Parameter(String)

Parameter reference for query parameters (e.g., $query_vector)

VectorLiteral(Vec<f32>)

Vector literal: [0.1, 0.2, 0.3] Represents an inline vector for similarity search

Trait Implementations

impl Clone for ValueExpression

fn clone(&self) -> ValueExpression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ValueExpression

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ValueExpression

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ValueExpression

fn eq(&self, other: &ValueExpression) -> 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 Serialize for ValueExpression

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ValueExpression