Struct Json

pub struct Json(pub Value);

A json type from PostgreSQL

Tuple Fields

0: Value

Trait Implementations

impl<'fcx> ArgAbi<'fcx> for Json

unsafe fn unbox_arg_unchecked(arg: Arg<'_, 'fcx>) -> Self

Unbox an argument with a matching type.

unsafe fn unbox_nullable_arg(arg: Arg<'_, 'fcx>) -> Nullable<Self>

Unbox a nullable arg

fn is_virtual_arg() -> bool

“Is this a virtual arg?”

impl BoxRet for Json

unsafe fn box_into<'fcx>(self, fcinfo: &mut FcInfo<'fcx>) -> Datum<'fcx>

Safety

impl Debug for Json

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

Formats the value using the given formatter.

impl FromDatum for Json

for json

unsafe fn from_polymorphic_datum( datum: Datum, is_null: bool, _: Oid, ) -> Option<Json>

Like from_datum for instantiating polymorphic types which require preserving the dynamic type metadata.

const GET_TYPOID: bool = false

Should a type OID be fetched when calling from_datum?

unsafe fn from_datum(datum: Datum, is_null: bool) -> Option<Self>

Safety

unsafe fn from_datum_in_memory_context( memory_context: PgMemoryContexts, datum: Datum, is_null: bool, typoid: Oid, ) -> Option<Self>

Default implementation switched to the specified memory context and then simply calls FromDatum::from_datum(...) from within that context.

unsafe fn try_from_datum( datum: Datum, is_null: bool, type_oid: Oid, ) -> Result<Option<Self>, TryFromDatumError>

where Self: IntoDatum,

try_from_datum is a convenience wrapper around FromDatum::from_datum that returns a a Result around an Option, as a Datum can be null. It’s intended to be used in situations where the caller needs to know whether the type conversion succeeded or failed.

unsafe fn try_from_datum_in_memory_context( memory_context: PgMemoryContexts, datum: Datum, is_null: bool, type_oid: Oid, ) -> Result<Option<Self>, TryFromDatumError>

where Self: IntoDatum,

A version of try_from_datum that switches to the given context to convert from Datum

impl IntoDatum for Json

for json

fn into_datum(self) -> Option<Datum>

fn type_oid() -> Oid

fn composite_type_oid(&self) -> Option<Oid>

fn is_compatible_with(other: Oid) -> bool

Is a Datum of this type compatible with another Postgres type?

impl Serialize for Json

fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SqlTranslatable for Json

fn argument_sql() -> Result<SqlMapping, ArgumentError>

fn return_sql() -> Result<Returns, ReturnsError>

fn type_name() -> &'static str

fn variadic() -> bool

fn optional() -> bool

fn entity() -> FunctionMetadataTypeEntity

impl UnboxDatum for Json

type As<'src> = Json where Self: 'src

Self with the lifetime 'src

unsafe fn unbox<'src>(d: Datum<'src>) -> Self::As<'src>

where Self: 'src,

Convert from Datum<'src> to T::As<'src>