Struct ExtensionOids 

pub struct ExtensionOids {
    pub vector: Option<u32>,
    pub enums: HashSet<u32>,
    pub domains: HashMap<u32, u32>,
    pub arrays: HashSet<u32>,
}

Per-database type OIDs, discovered once at connect time and threaded through decode calls.

Everything in here is assigned by the local database rather than fixed by pg_type.h: extension types get their OID at CREATE EXTENSION time, and enums and domains get theirs when the migration that declares them runs. The constants at the top of this module cover the built-in types whose OIDs are stable everywhere; this covers the rest.

Default means “nothing discovered yet”, under which any OID not in the built-in set is an Error::UnknownTypeOid rather than a guess — see decode_value.

Fields

vector: Option<u32>

pgvector’s vector type, if the extension is installed.

enums: HashSet<u32>

Every enum type OID. Postgres sends an enum’s binary value as its label text, so these decode as Str.

domains: HashMap<u32, u32>

Domain OID to the OID of the type it wraps. A domain’s wire format is its base type’s, so these decode by recursing on the base.

arrays: HashSet<u32>

Array types whose element is one of the enums or domains above. The element OID travels in the array’s own binary header, so recognising the array OID is all decode_array needs; without this an AuthenticationMethod[] column is an UnknownTypeOid even though every value in it would decode.

Trait Implementations

impl Clone for ExtensionOids

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtensionOids

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

Formats the value using the given formatter.

impl Default for ExtensionOids

fn default() -> Self

Returns the “default value” for a type.