Struct WindowFrame 

pub struct WindowFrame {
    pub units: WindowFrameUnits,
    pub start_bound: WindowFrameBound,
    pub end_bound: Option<WindowFrameBound>,
}

Specifies the data processed by a window function, e.g. RANGE UNBOUNDED PRECEDING or ROWS BETWEEN 5 PRECEDING AND CURRENT ROW.

Note: The parser does not validate the specified bounds; the caller should reject invalid bounds like ROWS UNBOUNDED FOLLOWING before execution.

Fields

units: WindowFrameUnits

Units for the frame (e.g. ROWS, RANGE, GROUPS).

start_bound: WindowFrameBound

The start bound of the window frame.

end_bound: Option<WindowFrameBound>

The right bound of the BETWEEN .. AND clause. The end bound of None indicates the shorthand form (e.g. ROWS 1 PRECEDING), which must behave the same as end_bound = WindowFrameBound::CurrentRow.

Trait Implementations

impl Clone for WindowFrame

fn clone(&self) -> WindowFrame

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WindowFrame

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

Formats the value using the given formatter.

impl Default for WindowFrame

fn default() -> WindowFrame

Returns default value for window frame

See this page for more details.

impl Eq for WindowFrame

impl Hash for WindowFrame

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

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 WindowFrame

fn cmp(&self, other: &WindowFrame) -> 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 WindowFrame

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

fn partial_cmp(&self, other: &WindowFrame) -> 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 StructuralPartialEq for WindowFrame

impl TryFrom<WindowFrame> for WindowFrame

Available on crate feature sql only.

type Error = DataFusionError

The type returned in the event of a conversion error.

fn try_from(value: WindowFrame) -> Result<WindowFrame, DataFusionError>

Performs the conversion.

impl Visit for WindowFrame

fn visit<V>(&self, visitor: &mut V) -> ControlFlow<<V as Visitor>::Break>

where V: Visitor,

Visit this node with the provided Visitor.

impl VisitMut for WindowFrame

fn visit<V>(&mut self, visitor: &mut V) -> ControlFlow<<V as VisitorMut>::Break>

where V: VisitorMut,

Mutably visit this node with the provided VisitorMut.