Struct VariantVal 

pub struct VariantVal {
    data: Box<[u8]>,
}

Owned value of the variant type.

The inner bytes are the little-endian metadata length followed by the Apache Parquet / Iceberg Variant metadata and value sections.

Fields

data: Box<[u8]>

Implementations

impl VariantVal

pub fn null() -> Self

pub fn from_parts(metadata: &[u8], value: &[u8]) -> Result<Self>

fn from_canonical_parts(metadata: &[u8], value: &[u8]) -> Self

pub fn from_parquet_variant(variant: ParquetVariant<'_, '_>) -> Result<Self>

pub fn from_json_value(json: &Value) -> Result<Self>

pub fn try_from_scalar_ref( value: Option<ScalarRefImpl<'_>>, data_type: &DataType, ) -> Result<Self>

pub fn value_deserialize(buf: &[u8]) -> Option<Self>

Decodes a value produced by VariantRef::value_serialize, checking structure only. Use only on trusted bytes; external bytes must go through Self::from_serialized_untrusted to re-establish the canonical invariants.

pub fn from_serialized_untrusted(buf: &[u8]) -> Result<Self>

Decodes a buffer from an untrusted origin (e.g. pgwire binary parameters), re-canonicalizing it so non-canonical inputs (unsorted dictionaries, non-canonical float bit patterns) cannot break Eq/Hash/Ord.

pub fn memcmp_deserialize( deserializer: &mut Deserializer<impl Buf>, ) -> Result<Self>

pub fn from_jsonb(jsonb: JsonbRef<'_>) -> Result<Self>

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

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

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

pub fn serialized_len(&self) -> usize

Trait Implementations

impl Clone for VariantVal

fn clone(&self) -> VariantVal

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VariantVal

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

Formats the value using the given formatter.

impl Display for VariantVal

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

Formats the value using the given formatter.

impl Eq for VariantVal

impl EstimateSize for VariantVal

fn estimated_heap_size(&self) -> usize

The estimated heap size of the current struct in bytes.

fn estimated_size(&self) -> usize

where Self: Sized,

The estimated total size of the current struct in bytes, including the estimated_heap_size and the size of Self.

impl From<VariantRef<'_>> for VariantVal

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

Converts to this type from the input type.

impl From<VariantVal> for ScalarImpl

fn from(val: VariantVal) -> Self

Converts to this type from the input type.

impl FromIterator<VariantVal> for VariantArray

fn from_iter<I: IntoIterator<Item = VariantVal>>(iter: I) -> Self

Creates a value from an iterator.

impl<'a> FromSql<'a> for VariantVal

fn accepts(ty: &Type) -> bool

Determines if a value of this type can be created from the specified Postgres Type.

fn from_sql( ty: &Type, raw: &'a [u8], ) -> Result<Self, Box<dyn Error + Sync + Send>>

Creates a new value of this type from a buffer of data of the specified Postgres Type in its binary format.

fn from_sql_null(ty: &Type) -> Result<Self, Box<dyn Error + Send + Sync>>

Creates a new value of this type from a NULL SQL value.

fn from_sql_nullable( ty: &Type, raw: Option<&'a [u8]>, ) -> Result<Self, Box<dyn Error + Send + Sync>>

A convenience function that delegates to from_sql and from_sql_null depending on the value of raw.

impl FromStr for VariantVal

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for VariantVal

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 HashKeyDe for VariantVal

fn deserialize(data_type: &DataType, buf: impl Buf) -> Self

impl Ord for VariantVal

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 VariantVal

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 VariantVal

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 RandValue for VariantVal

fn rand_value<R: Rng>(_rand: &mut R) -> Self

impl Scalar for VariantVal

type ScalarRefType<'a> = VariantRef<'a>

Type for reference of Scalar

fn as_scalar_ref(&self) -> Self::ScalarRefType<'_>

Get a reference to current scalar.

fn to_scalar_value(self) -> ScalarImpl

impl TryFrom<ScalarImpl> for VariantVal

type Error = ArrayError

The type returned in the event of a conversion error.

fn try_from(val: ScalarImpl) -> ArrayResult<Self>

Performs the conversion.

impl WithDataType for VariantVal

fn default_data_type() -> DataType

Returns the most obvious DataType for the rust type.

impl<'a> WithDataType for &'a VariantVal

fn default_data_type() -> DataType

Returns the most obvious DataType for the rust type.

impl<'a> WithDataType for &'a mut VariantVal

fn default_data_type() -> DataType

Returns the most obvious DataType for the rust type.

impl WithDataType for Box<VariantVal>

fn default_data_type() -> DataType

Returns the most obvious DataType for the rust type.