Struct VariantRef 

pub struct VariantRef<'a> {
    data: &'a [u8],
}

Borrowed value of the variant type.

Fields

data: &'a [u8]

Implementations

impl<'a> VariantRef<'a>

pub fn as_bytes(&self) -> &'a [u8]

Same bytes as Self::value_serialize, without the copy.

pub fn value_serialize(&self) -> Vec<u8>

pub fn memcmp_serialize( &self, serializer: &mut Serializer<impl BufMut>, ) -> Result<()>

pub fn from_serialized(buf: &'a [u8]) -> Option<Self>

pub fn from_serialized_unchecked(buf: &'a [u8]) -> Self

Wraps bytes already validated by Self::from_serialized, such as a slot of a VariantArray, which validates on the way in.

pub fn metadata(&self) -> &'a [u8]

pub fn value(&self) -> &'a [u8]

pub fn parquet_variant(&self) -> ParquetVariant<'a, 'a>

pub fn is_variant_null(&self) -> bool

pub fn is_array(&self) -> bool

pub fn is_object(&self) -> bool

pub fn type_name(&self) -> &'static str

pub fn access_path(self, path: &str) -> Option<VariantVal>

pub fn access_path_strict(self, path: &str) -> Result<Option<VariantVal>>

pub fn to_jsonb(self) -> Result<JsonbVal>

Trait Implementations

impl<'a> Clone for VariantRef<'a>

fn clone(&self) -> VariantRef<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for VariantRef<'a>

impl<'a> Debug for VariantRef<'a>

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

Formats the value using the given formatter.

impl Display for VariantRef<'_>

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

Formats the value using the given formatter.

impl Eq for VariantRef<'_>

impl From<VariantRef<'_>> for VariantVal

fn from(value: VariantRef<'_>) -> Self

Converts to this type from the input type.

impl From<VariantRef<'_>> for ScalarImpl

fn from(variant: VariantRef<'_>) -> Self

Converts to this type from the input type.

impl<'scalar> From<VariantRef<'scalar>> for ScalarRefImpl<'scalar>

fn from(val: VariantRef<'scalar>) -> Self

Converts to this type from the input type.

impl Hash for VariantRef<'_>

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 Ord for VariantRef<'_>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for VariantRef<'_>

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for VariantRef<'_>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'a> ScalarRef<'a> for VariantRef<'a>

type ScalarType = VariantVal

ScalarType is the owned type of current ScalarRef.

fn to_owned_scalar(&self) -> Self::ScalarType

Convert ScalarRef to an owned scalar.

fn hash_scalar<H: Hasher>(&self, state: &mut H)

A wrapped hash function to get the hash value for this scaler.

impl SelfAsScalarRef for VariantRef<'_>

fn as_scalar_ref(&self) -> Self

impl ToBinary for VariantRef<'_>

fn to_binary_with_type(&self, _ty: &DataType) -> Result<Bytes, ToBinaryError>

impl ToSql for VariantRef<'_>

fn accepts(ty: &Type) -> bool

Determines if a value of this type can be converted to the specified Postgres Type.

fn to_sql_checked( &self, ty: &Type, out: &mut BytesMut, ) -> Result<IsNull, Box<dyn Error + Sync + Send>>

An adaptor method used internally by Rust-Postgres.

fn to_sql( &self, ty: &Type, out: &mut BytesMut, ) -> Result<IsNull, Box<dyn Error + Sync + Send>>

where Self: Sized,

Converts the value of self into the binary format of the specified Postgres Type, appending it to out.

fn encode_format(&self, _ty: &Type) -> Format

Specify the encode format

impl ToText for VariantRef<'_>

fn write<W: Write>(&self, f: &mut W) -> Result

Write the text to the writer regardless of its data type

fn write_with_type<W: Write>(&self, _ty: &DataType, f: &mut W) -> Result

Write the text to the writer according to its data type

fn to_text_with_type(&self, ty: &DataType) -> String

Convert to text according to its data type

fn to_text(&self) -> String

to_text is a special version of to_text_with_type, it convert the scalar to default type text. E.g. for Int64, it will convert to text as a Int64 type. We should prefer to use to_text_with_type because it’s more clear and readable.

fn text_display(&self) -> impl Display + '_

Returns an displayable wrapper implemented with ToText::write.

impl<'scalar> TryFrom<ScalarRefImpl<'scalar>> for VariantRef<'scalar>

type Error = ArrayError

The type returned in the event of a conversion error.

fn try_from(val: ScalarRefImpl<'scalar>) -> ArrayResult<Self>

Performs the conversion.

impl WithDataType for VariantRef<'_>

fn default_data_type() -> DataType

Returns the most obvious DataType for the rust type.