Struct StructValue 

pub struct StructValue {
    fields: Box<[Datum]>,
}

Fields

fields: Box<[Datum]>

Implementations

impl StructValue

pub fn new(fields: Vec<Datum>) -> Self

pub fn empty() -> Self

Returns an empty struct.

pub fn fields(&self) -> &[Datum]

pub fn memcmp_deserialize<'a>( fields: impl IntoIterator<Item = &'a DataType>, deserializer: &mut Deserializer<impl Buf>, ) -> Result<Self>

pub fn from_str(s: &str, ty: &StructType) -> Result<Self, BoxedError>

Construct a struct from literal string.

Example

let ty = StructType::unnamed(vec![DataType::Int32, DataType::Float64]);
let s = StructValue::from_str("(1, 2.0)", &ty).unwrap();
assert_eq!(s.fields()[0], Some(ScalarImpl::Int32(1)));
assert_eq!(s.fields()[1], Some(ScalarImpl::Float64(2.0.into())));

let s = StructValue::from_str("(,)", &ty).unwrap();
assert_eq!(s.fields()[0], None);
assert_eq!(s.fields()[1], None);

Trait Implementations

impl Clone for StructValue

fn clone(&self) -> StructValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StructValue

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

Formats the value using the given formatter.

impl Default for StructValue

fn default() -> StructValue

Returns the “default value” for a type.

impl EstimateSize for StructValue

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<StructValue> for ScalarImpl

fn from(val: StructValue) -> Self

Converts to this type from the input type.

impl Hash for StructValue

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 StructValue

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

impl Ord for StructValue

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 StructValue

fn eq(&self, other: &StructValue) -> 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 StructValue

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 Scalar for StructValue

Implement Scalar for StructValue.

type ScalarRefType<'a> = StructRef<'a>

Type for reference of Scalar

fn as_scalar_ref(&self) -> StructRef<'_>

Get a reference to current scalar.

fn to_scalar_value(self) -> ScalarImpl

impl TryFrom<ScalarImpl> for StructValue

type Error = ArrayError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl Eq for StructValue

impl StructuralPartialEq for StructValue