Struct CreateDomainStatement 

pub struct CreateDomainStatement {
    pub name: String,
    pub base_type: ColumnTypeName,
    pub base_domain: Option<String>,
    pub default: Option<Expr>,
    pub not_null: bool,
    pub checks: Vec<Expr>,
}

v7.17.0 Phase 1.5 — CREATE DOMAIN AST.

Fields

name: String

base_type: ColumnTypeName

Base type for the domain (one of the built-in ColumnTypeName variants).

base_domain: Option<String>

v7.39 (round 259) — CREATE DOMAIN child AS parent … where parent is itself a DOMAIN. The parser already captured the unknown type name; it just was not carried here, so the parent’s CHECK constraints were invisible and a value violating them was silently accepted. base_type still holds the ultimate scalar type, which is what the storage tier stores.

default: Option<Expr>

Optional DEFAULT <expr>. Resolved at engine-side CREATE TABLE time when a column is bound to this domain.

not_null: bool

NOT NULL from the domain definition. Engine ORs this with the column-level nullability so the strictest of the two wins (i.e. the column is non-nullable if either side says so).

checks: Vec<Expr>

Zero-or-more CHECK (expr) predicates. Each one is enforced as part of the column’s CHECK list at INSERT / UPDATE time, with VALUE substituted for the column’s current cell value.

Trait Implementations

impl Clone for CreateDomainStatement

fn clone(&self) -> CreateDomainStatement

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CreateDomainStatement

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

Formats the value using the given formatter.

impl Display for CreateDomainStatement

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

Formats the value using the given formatter.

impl PartialEq for CreateDomainStatement

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CreateDomainStatement