Enum WindowFrameBound 

pub enum WindowFrameBound<X: Extension = NoExt> {
    CurrentRow {
        meta: Meta,
    },
    UnboundedPreceding {
        meta: Meta,
    },
    UnboundedFollowing {
        meta: Meta,
    },
    Preceding {
        offset: Box<Expr<X>>,
        meta: Meta,
    },
    Following {
        offset: Box<Expr<X>>,
        meta: Meta,
    },
}

One bound of a window frame.

The offset forms carry their <expr> PRECEDING/FOLLOWING distance; the UNBOUNDED/CURRENT ROW forms carry their keyword span in Meta.

Variants

CurrentRow

CURRENT ROW — the bound at the current row.

Fields

meta: Meta

Source location and node identity.

UnboundedPreceding

UNBOUNDED PRECEDING — the bound at the partition’s first row.

Fields

meta: Meta

Source location and node identity.

UnboundedFollowing

UNBOUNDED FOLLOWING — the bound at the partition’s last row.

Fields

meta: Meta

Source location and node identity.

Preceding

<offset> PRECEDING — a bound the given distance before the current row.

Fields

offset: Box<Expr<X>>

Row or frame offset selected by this syntax.

meta: Meta

Source location and node identity.

Following

<offset> FOLLOWING — a bound the given distance after the current row.

Fields

offset: Box<Expr<X>>

Row or frame offset selected by this syntax.

meta: Meta

Source location and node identity.

Trait Implementations

impl<X: Clone + Extension> Clone for WindowFrameBound<X>

fn clone(&self) -> WindowFrameBound<X>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<X: Debug + Extension> Debug for WindowFrameBound<X>

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

Formats the value using the given formatter.

impl<'de, X> Deserialize<'de> for WindowFrameBound<X>

where X: Deserialize<'de> + Extension,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<X: Eq + Extension> Eq for WindowFrameBound<X>

impl<X: Hash + Extension> Hash for WindowFrameBound<X>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<X: PartialEq + Extension> PartialEq for WindowFrameBound<X>

fn eq(&self, other: &WindowFrameBound<X>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<X: Extension + Render> Render for WindowFrameBound<X>

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

Return the render for this value.

fn operand_binding_power(&self) -> Option<BindingPower>

The binding power this node contributes when it appears as an operand, or None (the default) for a self-delimiting node — an atom, call, or constructor — that never needs parentheses.

impl<X> Serialize for WindowFrameBound<X>

where X: Serialize + Extension,

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<X: Extension> Spanned for WindowFrameBound<X>

fn span(&self) -> Span

Return the span for this value.

impl<X: PartialEq + Extension> StructuralPartialEq for WindowFrameBound<X>