Enum CreateTypeDefinition 

pub enum CreateTypeDefinition<X: Extension = NoExt> {
    Enum {
        labels: ThinVec<Literal>,
        meta: Meta,
    },
    EnumFromQuery {
        query: Box<Query<X>>,
        meta: Meta,
    },
    Alias {
        data_type: DataType<X>,
        meta: Meta,
    },
}

The AS <definition> body of a CreateType. DuckDB’s CREATE TYPE grammar has a dedicated ENUM rule distinct from the general data-type grammar — its labels are parser-restricted to string constants (ENUM(1, 2) is a parse error, unlike the data-type-position x::ENUM(...) cast, which parses any modifier and only bind-rejects a non-string) — so an enum definition is its own variant rather than a DataType::Enum. Every non-ENUM spelling (STRUCT/MAP/ UNION, an alias to a named type, arrays, DECIMAL(p, s), …) reuses the shared data type via Alias.

Variants

Enum

AS ENUM ('a', 'b', …) — a labelled enumeration. The label list may be empty (ENUM (), which DuckDB accepts) and each label is a string literal.

Fields

labels: ThinVec<Literal>

labels in source order.

meta: Meta

Source location and node identity.

EnumFromQuery

AS ENUM (<query>) — the enum labels are drawn from a query’s single column (ENUM (SELECT DISTINCT month FROM …)); the parenthesized query reuses Query.

Fields

query: Box<Query<X>>

Query governed by this node.

meta: Meta

Source location and node identity.

Alias

AS <type> — an alias to another type: a scalar (AS VARCHAR), a composite/nested constructor (AS STRUCT(…) / AS MAP(…) / AS UNION(…)), an array (AS my_int[]), or a named user type. Reuses the shared DataType grammar.

Fields

data_type: DataType<X>

Data type named by this syntax.

meta: Meta

Source location and node identity.

Trait Implementations

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

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

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

Formats the value using the given formatter.

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

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

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

Equality operator ==.

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

Inequality operator !=.

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

fn span(&self) -> Span

Return the span for this value.

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