Enum WindowFunctionDefinition 

pub enum WindowFunctionDefinition {
    AggregateUDF(Arc<AggregateUDF>),
    WindowUDF(Arc<WindowUDF>),
}

A function used as a SQL window function

In SQL, you can use:

• Actual window functions (WindowUDF)
• Normal aggregate functions (AggregateUDF)

Variants

AggregateUDF(Arc<AggregateUDF>)

A user defined aggregate function

WindowUDF(Arc<WindowUDF>)

A user defined aggregate function

Implementations

impl WindowFunctionDefinition

pub fn return_field( &self, input_expr_fields: &[FieldRef], display_name: &str, ) -> Result<FieldRef>

Returns the datatype of the window function

pub fn signature(&self) -> Signature

The signatures supported by the function fun.

pub fn name(&self) -> &str

Function’s name for display

pub fn simplify(&self) -> Option<WindowFunctionSimplification>

Return the the inner window simplification function, if any

See WindowFunctionSimplification for more information

Trait Implementations

impl Clone for WindowFunctionDefinition

fn clone(&self) -> WindowFunctionDefinition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WindowFunctionDefinition

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

Formats the value using the given formatter.

impl Display for WindowFunctionDefinition

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

Formats the value using the given formatter.

impl From<Arc<AggregateUDF>> for WindowFunctionDefinition

fn from(value: Arc<AggregateUDF>) -> Self

Converts to this type from the input type.

impl From<Arc<WindowUDF>> for WindowFunctionDefinition

fn from(value: Arc<WindowUDF>) -> Self

Converts to this type from the input type.

impl Hash for WindowFunctionDefinition

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 PartialEq for WindowFunctionDefinition

fn eq(&self, other: &WindowFunctionDefinition) -> 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 WindowFunctionDefinition

fn partial_cmp(&self, other: &WindowFunctionDefinition) -> 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 Eq for WindowFunctionDefinition

impl StructuralPartialEq for WindowFunctionDefinition