Struct WindowSpec 

pub struct WindowSpec {
    pub func: WindowFuncKind,
    pub column: Option<String>,
    pub partition_by: Vec<String>,
    pub order_by: Vec<(String, OrderDirection)>,
    pub alias: String,
}

Specification for a window function projection.

Mirrors the design of [super::ast::HavingExpr]: a structured AST node stored in super::state::QueryState and compiled to SQL at generation time so that dialect-specific identifier quoting is applied consistently.

Fields

func: WindowFuncKind

The window function to apply.

column: Option<String>

The column argument (required for aggregate/offset functions, ignored for ranking functions).

partition_by: Vec<String>

PARTITION BY columns (empty for no partitioning).

order_by: Vec<(String, OrderDirection)>

ORDER BY within the window frame.

alias: String

The output column alias (emitted as AS <alias>).

Implementations

impl WindowSpec

pub fn to_sql(&self, gen: &dyn ISqlGenerator) -> String

Compiles this window function into a SELECT-list projection fragment using the provider’s identifier quoting.

Ranking functions emit FUNC() OVER (...); aggregate/offset functions emit FUNC(col) OVER (...). The alias is always appended.

Trait Implementations

impl Clone for WindowSpec

fn clone(&self) -> WindowSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WindowSpec

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

Formats the value using the given formatter.