Enum AnalyticFunctionKind 

pub enum AnalyticFunctionKind {
    Lag,
    Lead,
    FirstValue,
    LastValue,
    NthValue,
}

The kind of analytic window function.

Variants

Lag

LAG — look back offset rows in the partition.

Lead

LEAD — look ahead offset rows in the partition.

FirstValue

FIRST_VALUE — always emit the first row’s value in the partition.

LastValue

LAST_VALUE — always emit the current (most recent) row’s value.

NthValue

NTH_VALUE — emit the Nth row’s value (offset = N).

Implementations

impl AnalyticFunctionKind

pub fn is_lag(self) -> bool

Returns true if this is a LAG function.

pub fn is_lead(self) -> bool

Returns true if this is a LEAD function.

Trait Implementations

impl Clone for AnalyticFunctionKind

fn clone(&self) -> AnalyticFunctionKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AnalyticFunctionKind

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

Formats the value using the given formatter.

impl PartialEq for AnalyticFunctionKind

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for AnalyticFunctionKind

impl Eq for AnalyticFunctionKind

impl StructuralPartialEq for AnalyticFunctionKind