Struct WindowFunctionSpec 

pub struct WindowFunctionSpec {
    pub spec: WindowSpec,
    pub function_name: String,
    pub args: Vec<SqlExpression>,
    pub output_column_index: usize,
}

Specification for a single window function in a query

This structure captures all metadata needed to evaluate a window function and place its results in the output table

Fields

spec: WindowSpec

The window specification (PARTITION BY, ORDER BY, frame)

function_name: String

Function name (e.g., “LAG”, “LEAD”, “ROW_NUMBER”)

args: Vec<SqlExpression>

Arguments to the window function

output_column_index: usize

Column index in the output table where results should be placed

Trait Implementations

impl Clone for WindowFunctionSpec

fn clone(&self) -> WindowFunctionSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WindowFunctionSpec

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

Formats the value using the given formatter.