Struct WindowFunctionKey 

pub struct WindowFunctionKey {
    pub key: String,
}

Key for identifying and hashing window function expressions Used to map window function expressions to their pre-computed column indices

Fields

key: String

Serialized representation of the window function for hashing Format: “FUNC_NAME(args)|PARTITION BY col1,col2|ORDER BY col3 ASC|FRAME_SPEC”

Implementations

impl WindowFunctionKey

pub fn from_expression( function: &WindowFunctionSpec, window: &WindowSpec, ) -> Self

Create a key from a window function expression

If the window spec has a base_window_name (i.e., references a named window), that name is used as the key instead of the resolved spec. This ensures that lookups using the original expression match the resolved result.

Trait Implementations

impl Clone for WindowFunctionKey

fn clone(&self) -> WindowFunctionKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WindowFunctionKey

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

Formats the value using the given formatter.

impl Eq for WindowFunctionKey

impl Hash for WindowFunctionKey

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 WindowFunctionKey

fn eq(&self, other: &WindowFunctionKey) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for WindowFunctionKey