Enum WindowFunc 

pub enum WindowFunc {
    RowNumber,
    Rank,
    DenseRank,
    PercentRank,
    CumeDist,
    Ntile(u32),
    Lag {
        expr: Box<Expr>,
        offset: u32,
        default: Option<Box<Expr>>,
    },
    Lead {
        expr: Box<Expr>,
        offset: u32,
        default: Option<Box<Expr>>,
    },
    FirstValue(Box<Expr>),
    LastValue(Box<Expr>),
    Aggregate(Aggregate),
}

The function evaluated over the window.

Variants

RowNumber

ROW_NUMBER().

Rank

RANK().

DenseRank

DENSE_RANK().

PercentRank

PERCENT_RANK().

CumeDist

CUME_DIST().

Ntile(u32)

NTILE(n).

Lag

LAG(expr, offset [, default]).

Fields

expr: Box<Expr>

Value read from a preceding row.

offset: u32

Rows to look back.

default: Option<Box<Expr>>

Value when there is no such row.

Lead

LEAD(expr, offset [, default]).

Fields

expr: Box<Expr>

Value read from a following row.

offset: u32

Rows to look ahead.

default: Option<Box<Expr>>

Value when there is no such row.

FirstValue(Box<Expr>)

FIRST_VALUE(expr).

LastValue(Box<Expr>)

LAST_VALUE(expr).

Aggregate(Aggregate)

An aggregate evaluated over the window (SUM(x) OVER (..), running totals).

Trait Implementations

impl Clone for WindowFunc

fn clone(&self) -> WindowFunc

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WindowFunc

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

Formats the value using the given formatter.

impl PartialEq for WindowFunc

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for WindowFunc