Enum UnaryFunc

pub enum UnaryFunc {
    Not,
    IsNull,
    IsTrue,
    IsFalse,
    StepTimestamp,
    Cast(ConcreteDataType),
    TumbleWindowFloor {
        window_size: Duration,
        start_time: Option<Timestamp>,
    },
    TumbleWindowCeiling {
        window_size: Duration,
        start_time: Option<Timestamp>,
    },
}

UnaryFunc is a function that takes one argument. Also notice this enum doesn’t contain function arguments, because the arguments are stored in the expression. (except cast function, which requires a type argument)

Variants

Not

IsNull

IsTrue

IsFalse

StepTimestamp

Cast(ConcreteDataType)

TumbleWindowFloor

Fields

window_size: Duration

start_time: Option<Timestamp>

TumbleWindowCeiling

Fields

window_size: Duration

start_time: Option<Timestamp>

Implementations

impl UnaryFunc

pub fn signature(&self) -> Signature

Return the signature of the function

pub fn is_valid_func_name(name: &str) -> bool

pub fn from_str_and_type( name: &str, arg_type: Option<ConcreteDataType>, ) -> Result<Self, Error>

Create a UnaryFunc from a string of the function name and given argument type(optional)

pub fn eval_batch( &self, batch: &Batch, expr: &ScalarExpr, ) -> Result<VectorRef, EvalError>

pub fn from_tumble_func( name: &str, args: &[TypedExpr], ) -> Result<(Self, TypedExpr), Error>

pub fn eval( &self, values: &[Value], expr: &ScalarExpr, ) -> Result<Value, EvalError>

Evaluate the function with given values and expression

Arguments

• values: The values to be used in the evaluation

• expr: The expression to be evaluated and use as argument, will extract the value from the values and evaluate the expression

Trait Implementations

impl Clone for UnaryFunc

fn clone(&self) -> UnaryFunc

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for UnaryFunc

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for UnaryFunc

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for UnaryFunc

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 Ord for UnaryFunc

fn cmp(&self, other: &UnaryFunc) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for UnaryFunc

fn eq(&self, other: &UnaryFunc) -> 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 PartialOrd for UnaryFunc

fn partial_cmp(&self, other: &UnaryFunc) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for UnaryFunc

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for UnaryFunc

impl StructuralPartialEq for UnaryFunc