Struct OptimizedWindowSpec 

pub struct OptimizedWindowSpec {
    pub partition_by: PartitionByList,
    pub order_by: SmallVec<[(Identifier, SortOrder); 4]>,
    pub frame: Option<WindowFrame>,
    pub window_ref: Option<Identifier>,
}

An optimized window specification using SmallVec for partition/order columns.

This is a more memory-efficient version of WindowSpec that uses stack-allocated small vectors for typical use cases.

Fields

partition_by: PartitionByList

Partition columns (typically 1-4).

order_by: SmallVec<[(Identifier, SortOrder); 4]>

Order by columns with direction (typically 1-4).

frame: Option<WindowFrame>

Frame type.

window_ref: Option<Identifier>

Reference to a named window.

Implementations

impl OptimizedWindowSpec

pub fn new() -> Self

Create a new empty window spec.

pub fn partition_by<I, S>(self, columns: I) -> Self

where I: IntoIterator<Item = S>, S: Into<Identifier>,

Add partition by columns.

pub fn partition_by_col(self, column: impl Into<Identifier>) -> Self

Add a single partition column.

pub fn order_by(self, column: impl Into<Identifier>, order: SortOrder) -> Self

Add order by column with sort direction.

pub fn rows(self, start: FrameBound, end: Option<FrameBound>) -> Self

Set frame to ROWS BETWEEN … AND …

pub fn rows_unbounded_preceding(self) -> Self

Set frame to ROWS UNBOUNDED PRECEDING.

pub fn window_ref(self, name: impl Into<Identifier>) -> Self

Set a reference to a named window.

pub fn to_sql(&self, _db_type: DatabaseType) -> String

Generate SQL for the OVER clause.

Trait Implementations

impl Clone for OptimizedWindowSpec

fn clone(&self) -> OptimizedWindowSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OptimizedWindowSpec

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

Formats the value using the given formatter.

impl Default for OptimizedWindowSpec

fn default() -> OptimizedWindowSpec

Returns the “default value” for a type.