Struct diesel::pg::PgTypeMetadata

pub struct PgTypeMetadata(_);

Available on crate feature postgres_backend only.

The OIDs for a SQL type

Implementations

impl PgTypeMetadata

pub fn new(type_oid: u32, array_oid: u32) -> Self

Create a new instance of this type based on known constant OIDs.

Please refer to PgMetadataLookup for a way to query OIDs of custom types at run time

pub fn from_result(r: Result<(u32, u32), FailedToLookupTypeError>) -> Self

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Create a new instance of this type based on dynamically lookup informations

This function is useful for third party crates that may implement a custom postgres connection type and want to bring their own lookup mechanism.

Otherwise refer to PgMetadataLookup for a way to automatically implement the corresponding lookup functionality

pub fn oid(&self) -> Result<u32, impl Error + Send + Sync>

The OID of T

pub fn array_oid(&self) -> Result<u32, impl Error + Send + Sync>

The OID of T[]

Trait Implementations

impl Clone for PgTypeMetadata

fn clone(&self) -> PgTypeMetadata

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PgTypeMetadata

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

Formats the value using the given formatter.

impl Hash for PgTypeMetadata

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 PartialEq<PgTypeMetadata> for PgTypeMetadata

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for PgTypeMetadata

impl StructuralEq for PgTypeMetadata

impl StructuralPartialEq for PgTypeMetadata