Enum SelectDistinct 

pub enum SelectDistinct<X: Extension = NoExt> {
    Quantifier {
        quantifier: SetQuantifier,
        meta: Meta,
    },
    On {
        exprs: ThinVec<Expr<X>>,
        meta: Meta,
    },
}

A SELECT-list set quantifier: the standard SetQuantifier (ALL/DISTINCT) or PostgreSQL’s DISTINCT ON (<expr>, ...).

The enclosing Select::distinct is None when the SELECT writes no quantifier; the ON variant carries the deduplication keys, which only PG’s DISTINCT ON admits (so it has no SetQuantifier counterpart).

Variants

Quantifier

A standard ALL or DISTINCT quantifier.

Fields

quantifier: SetQuantifier

Whether ALL or DISTINCT; see SetQuantifier.

meta: Meta

Source location and node identity.

On

PostgreSQL DISTINCT ON (<expr>, ...): deduplicate on the listed keys only.

Fields

exprs: ThinVec<Expr<X>>

exprs in source order.

meta: Meta

Source location and node identity.

Trait Implementations

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

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

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

Formats the value using the given formatter.

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

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

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

Equality operator ==.

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

Inequality operator !=.

impl<X> Serialize for SelectDistinct<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 SelectDistinct<X>

fn span(&self) -> Span

Return the span for this value.

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