Struct CompositeDef 

pub struct CompositeDef {
    pub name: String,
    pub fields: Vec<(String, DataType)>,
    pub field_user_types: Vec<Option<String>>,
}

v7.37.42-T2 ζ-B — catalogued user-defined COMPOSITE type (CREATE TYPE name AS (field_name field_type, ...)). Order matters: PG composite literals are positional, and SPG mirrors that. Stored as ordered (name, DataType) pairs to keep the codec straightforward and to allow eventual Value::Composite bodies to encode positionally. Persisted in catalog FILE_VERSION 52+; older catalogs deserialise with an empty composite_types map. Composite types can be used as a column type by spelling the composite’s name; the resolution from ColumnSchema.user_composite_type = Some(name) happens at the engine boundary (parallel to user_enum_type / user_domain_type). The dense storage shape — JSON-text body keyed by the composite’s field list — keeps the codec free of recursive Value bodies until the full Value::Composite arena migration in a later phase.

Fields

name: String

fields: Vec<(String, DataType)>

Ordered (field_name, field_type) pairs. PG composite literals are positional, so order is part of the type’s identity.

field_user_types: Vec<Option<String>>

v7.39 (round 264) — parallel to fields: the USER type name of each field when it is itself a composite (or another named user type). DataType has no room for one, so a nested composite field resolved to the parser’s Text placeholder and the inner record stayed TEXT — (x).inner.street errored, pg_typeof said text, and row_to_json nested a string instead of an object. Same shape as ColumnSchema.user_composite_type and DomainDef.base_domain. Catalog FILE_VERSION 76+; an older catalog reads all-None, which is what it meant.

Trait Implementations

impl Clone for CompositeDef

fn clone(&self) -> CompositeDef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompositeDef

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

Formats the value using the given formatter.

impl Eq for CompositeDef

impl PartialEq for CompositeDef

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CompositeDef