Struct Scalar 

pub struct Scalar { /* private fields */ }

A typed scalar value.

Scalars represent a single value with an associated DType. The value can be null, in which case the value method returns None.

Implementations

impl Scalar

pub fn cast(&self, target_dtype: &DType) -> VortexResult<Scalar>

Cast this scalar to another data type.

Errors

Returns an error if the cast is not supported or if a null value is cast to a non-nullable type.

pub fn into_nullable(self) -> Scalar

Cast the scalar into a nullable version of its current type.

impl Scalar

pub fn bool(value: bool, nullability: Nullability) -> Self

Creates a new boolean scalar with the given value and nullability.

pub fn primitive<T: NativePType + Into<PValue>>( value: T, nullability: Nullability, ) -> Self

Creates a new primitive scalar from a native value.

pub fn primitive_value( value: PValue, ptype: PType, nullability: Nullability, ) -> Self

Create a PrimitiveScalar from a PValue.

Note that an explicit PType is passed since any compatible PValue may be used as the value for a primitive type.

pub fn decimal( value: DecimalValue, decimal_type: DecimalDType, nullability: Nullability, ) -> Self

Creates a new decimal scalar with the given value, precision, scale, and nullability.

pub fn utf8<B>(str: B, nullability: Nullability) -> Self

where B: Into<BufferString>,

Creates a new UTF-8 scalar from a string-like value.

Panics

Panics if the input cannot be converted to a valid UTF-8 string.

pub fn try_utf8<B>( str: B, nullability: Nullability, ) -> Result<Self, <B as TryInto<BufferString>>::Error>

where B: TryInto<BufferString>,

Tries to create a new UTF-8 scalar from a string-like value.

Errors

Returns an error if the input cannot be converted to a valid UTF-8 string.

pub fn binary(buffer: impl Into<ByteBuffer>, nullability: Nullability) -> Self

Creates a new binary scalar from a byte buffer.

pub fn list( element_dtype: impl Into<Arc<DType>>, children: Vec<Scalar>, nullability: Nullability, ) -> Self

Creates a new list scalar with the given element type and children.

Panics

Panics if any child scalar has a different type than the element type, or if there are too many children.

pub fn list_empty(element_dtype: Arc<DType>, nullability: Nullability) -> Self

Creates a new empty list scalar with the given element type.

pub fn fixed_size_list( element_dtype: impl Into<Arc<DType>>, children: Vec<Scalar>, nullability: Nullability, ) -> Self

Creates a new fixed-size list scalar with the given element type and children.

Panics

Panics if any child scalar has a different type than the element type, or if there are too many children.

pub fn extension<V: ExtDTypeVTable + Default>( options: V::Metadata, value: Scalar, ) -> Self

Creates a new extension scalar wrapping the given storage value.

pub fn extension_ref(ext_dtype: ExtDTypeRef, value: Scalar) -> Self

Creates a new extension scalar wrapping the given storage value.

Panics

Panics if the storage dtype of ext_dtype does not match value’s dtype.

impl Scalar

pub fn as_bool(&self) -> BoolScalar<'_>

Returns a view of the scalar as a boolean scalar.

Panics

Panics if the scalar does not have a Bool type.

pub fn as_bool_opt(&self) -> Option<BoolScalar<'_>>

Returns a view of the scalar as a boolean scalar if it has a boolean type.

pub fn as_primitive(&self) -> PrimitiveScalar<'_>

Returns a view of the scalar as a primitive scalar.

Panics

Panics if the scalar does not have a Primitive type.

pub fn as_primitive_opt(&self) -> Option<PrimitiveScalar<'_>>

Returns a view of the scalar as a primitive scalar if it has a primitive type.

pub fn as_decimal(&self) -> DecimalScalar<'_>

Returns a view of the scalar as a decimal scalar.

Panics

Panics if the scalar does not have a Decimal type.

pub fn as_decimal_opt(&self) -> Option<DecimalScalar<'_>>

Returns a view of the scalar as a decimal scalar if it has a decimal type.

pub fn as_utf8(&self) -> Utf8Scalar<'_>

Returns a view of the scalar as a UTF-8 string scalar.

Panics

Panics if the scalar does not have a Utf8 type.

pub fn as_utf8_opt(&self) -> Option<Utf8Scalar<'_>>

Returns a view of the scalar as a UTF-8 string scalar if it has a UTF-8 type.

pub fn as_binary(&self) -> BinaryScalar<'_>

Returns a view of the scalar as a binary scalar.

Panics

Panics if the scalar does not have a Binary type.

pub fn as_binary_opt(&self) -> Option<BinaryScalar<'_>>

Returns a view of the scalar as a binary scalar if it has a binary type.

pub fn as_struct(&self) -> StructScalar<'_>

Returns a view of the scalar as a struct scalar.

Panics

Panics if the scalar does not have a Struct type.

pub fn as_struct_opt(&self) -> Option<StructScalar<'_>>

Returns a view of the scalar as a struct scalar if it has a struct type.

pub fn as_list(&self) -> ListScalar<'_>

Returns a view of the scalar as a list scalar.

Note that we use ListScalar to represent both List and FixedSizeList.

Panics

Panics if the scalar does not have a List or FixedSizeList type.

pub fn as_list_opt(&self) -> Option<ListScalar<'_>>

Returns a view of the scalar as a list scalar if it has a list type.

Note that we use ListScalar to represent both List and FixedSizeList.

pub fn as_extension(&self) -> ExtScalar<'_>

Returns a view of the scalar as an extension scalar.

Panics

Panics if the scalar does not have a Extension type.

pub fn as_extension_opt(&self) -> Option<ExtScalar<'_>>

Returns a view of the scalar as an extension scalar if it has an extension type.

impl Scalar

pub fn from_proto_value( value: &ScalarValue, dtype: &DType, ) -> VortexResult<Self>

Creates a Scalar from a protobuf ScalarValue representation.

Note that we need to provide a DType since protobuf serialization only supports 64-bit integers, and serializing into protobuf loses that type information.

Errors

Returns an error if type validation fails.

pub fn from_proto(value: &Scalar, session: &VortexSession) -> VortexResult<Self>

Creates a Scalar from its protobuf representation.

Errors

Returns an error if the protobuf is missing required fields or if type validation fails.

impl Scalar

pub fn null(dtype: DType) -> Self

Creates a new null Scalar with the given DType.

Panics

Panics if the given DType is non-nullable.

pub fn null_native<T: NativeDType>() -> Self

Creates a new null Scalar for the given scalar type.

The resulting scalar will have a nullable version of the type’s data type.

pub fn try_new(dtype: DType, value: Option<ScalarValue>) -> VortexResult<Self>

Attempts to create a new Scalar with the given DType and potentially null ScalarValue.

Errors

Returns an error if the given DType and ScalarValue are incompatible.

pub unsafe fn new_unchecked(dtype: DType, value: Option<ScalarValue>) -> Self

Creates a new Scalar with the given DType and potentially null ScalarValue without checking compatibility.

Safety

The caller must ensure that the given DType and ScalarValue are compatible per the rules defined in Self::is_compatible.

pub fn default_value(dtype: &DType) -> Self

Returns a default value for the given DType.

For nullable types, this returns a null scalar. For non-nullable and non-nested types, this returns the zero value for the type.

For non-nullable and nested types that may need null values in their children (as of right now, that is only FixedSizeList and Struct), this function will provide null default children.

See ScalarValue::zero_value for more details about “zero” values.

pub fn zero_value(dtype: &DType) -> Self

Returns a non-null zero / identity value for the given DType.

See ScalarValue::zero_value for more details about “zero” values.

pub fn is_compatible(dtype: &DType, value: Option<&ScalarValue>) -> bool

Check if the given ScalarValue is compatible with the given DType.

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

Check if two scalars are equal, ignoring nullability of the DType.

pub fn into_parts(self) -> (DType, Option<ScalarValue>)

Returns the parts of the Scalar.

pub fn dtype(&self) -> &DType

Returns the DType of the Scalar.

pub fn value(&self) -> Option<&ScalarValue>

Returns an optional ScalarValue of the Scalar, where None means the value is null.

pub fn into_value(self) -> Option<ScalarValue>

Returns the internal optional ScalarValue, where None means the value is null, consuming the Scalar.

pub fn is_valid(&self) -> bool

Returns true if the Scalar has a non-null value.

pub fn is_null(&self) -> bool

Returns true if the Scalar is null.

pub fn is_zero(&self) -> Option<bool>

Returns true if the Scalar has a non-null zero value.

Returns None if the scalar is null, otherwise returns Some(true) if the value is zero and Some(false) otherwise.

pub fn primitive_reinterpret_cast(&self, ptype: PType) -> VortexResult<Self>

Reinterprets the bytes of this scalar as a different primitive type.

Errors

Panics if the scalar is not a primitive type or if the types have different byte widths.

pub fn nbytes(&self) -> usize

Returns an ESTIMATE of the size of the scalar in bytes, uncompressed.

Note that the protobuf serialization of scalars will likely have a different (but roughly similar) length.

impl Scalar

pub fn struct_(dtype: DType, children: Vec<Scalar>) -> Self

Creates a new struct scalar with the given fields.

Trait Implementations

impl Clone for Scalar

fn clone(&self) -> Scalar

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Scalar

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

Formats the value using the given formatter.

impl Display for Scalar

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

Formats the value using the given formatter.

impl From<&[u8]> for Scalar

fn from(value: &[u8]) -> Self

Converts to this type from the input type.

impl<'a> From<&'a Scalar> for Input<'a>

fn from(value: &'a Scalar) -> Self

Converts to this type from the input type.

impl From<&Scalar> for Scalar

fn from(value: &Scalar) -> Self

Converts to this type from the input type.

impl From<&str> for Scalar

fn from(value: &str) -> Self

Converts to this type from the input type.

impl From<Buffer<u8>> for Scalar

fn from(value: ByteBuffer) -> Self

Converts to this type from the input type.

impl From<BufferString> for Scalar

fn from(value: BufferString) -> Self

Converts to this type from the input type.

impl From<DecimalScalar<'_>> for Scalar

fn from(ds: DecimalScalar<'_>) -> Self

Converts to this type from the input type.

impl From<DecimalValue> for Scalar

fn from(value: DecimalValue) -> Self

Converts to this type from the input type.

impl From<Option<&[u8]>> for Scalar

fn from(value: Option<&[u8]>) -> Self

Converts to this type from the input type.

impl From<Option<&str>> for Scalar

fn from(value: Option<&str>) -> Self

Converts to this type from the input type.

impl From<Option<Buffer<u8>>> for Scalar

fn from(value: Option<ByteBuffer>) -> Self

Converts to this type from the input type.

impl From<Option<BufferString>> for Scalar

fn from(value: Option<BufferString>) -> Self

Converts to this type from the input type.

impl From<Option<DecimalValue>> for Scalar

fn from(value: Option<DecimalValue>) -> Self

Converts to this type from the input type.

impl From<Option<String>> for Scalar

fn from(value: Option<String>) -> Self

Converts to this type from the input type.

impl<T> From<Option<Vec<T>>> for Scalar

where T: NativeDType, Scalar: From<T>,

fn from(vec: Option<Vec<T>>) -> Self

Converts to this type from the input type.

impl From<Option<bool>> for Scalar

fn from(value: Option<bool>) -> Self

Converts to this type from the input type.

impl From<Option<f16>> for Scalar

Nullable Into<Scalar> implementation for T.

fn from(value: Option<f16>) -> Self

Converts to this type from the input type.

impl From<Option<f32>> for Scalar

Nullable Into<Scalar> implementation for T.

fn from(value: Option<f32>) -> Self

Converts to this type from the input type.

impl From<Option<f64>> for Scalar

Nullable Into<Scalar> implementation for T.

fn from(value: Option<f64>) -> Self

Converts to this type from the input type.

impl From<Option<i16>> for Scalar

Nullable Into<Scalar> implementation for T.

fn from(value: Option<i16>) -> Self

Converts to this type from the input type.

impl From<Option<i32>> for Scalar

Nullable Into<Scalar> implementation for T.

fn from(value: Option<i32>) -> Self

Converts to this type from the input type.

impl From<Option<i64>> for Scalar

Nullable Into<Scalar> implementation for T.

fn from(value: Option<i64>) -> Self

Converts to this type from the input type.

impl From<Option<i8>> for Scalar

Nullable Into<Scalar> implementation for T.

fn from(value: Option<i8>) -> Self

Converts to this type from the input type.

impl From<Option<u16>> for Scalar

Nullable Into<Scalar> implementation for T.

fn from(value: Option<u16>) -> Self

Converts to this type from the input type.

impl From<Option<u32>> for Scalar

Nullable Into<Scalar> implementation for T.

fn from(value: Option<u32>) -> Self

Converts to this type from the input type.

impl From<Option<u64>> for Scalar

Nullable Into<Scalar> implementation for T.

fn from(value: Option<u64>) -> Self

Converts to this type from the input type.

impl From<Option<u8>> for Scalar

Nullable Into<Scalar> implementation for T.

fn from(value: Option<u8>) -> Self

Converts to this type from the input type.

impl From<Option<usize>> for Scalar

fn from(value: Option<usize>) -> Self

Converts to this type from the input type.

impl From<PrimitiveScalar<'_>> for Scalar

fn from(ps: PrimitiveScalar<'_>) -> Self

Converts to this type from the input type.

impl From<Scalar> for Output

fn from(value: Scalar) -> Self

Converts to this type from the input type.

impl From<String> for Scalar

fn from(value: String) -> Self

Converts to this type from the input type.

impl<T> From<Vec<T>> for Scalar

where T: NativeDType, Scalar: From<T>,

fn from(vec: Vec<T>) -> Self

Converts to this type from the input type.

impl From<bool> for Scalar

fn from(value: bool) -> Self

Converts to this type from the input type.

impl From<f16> for Scalar

Non-nullable Into<Scalar> implementation for T.

fn from(value: f16) -> Self

Converts to this type from the input type.

impl From<f32> for Scalar

Non-nullable Into<Scalar> implementation for T.

fn from(value: f32) -> Self

Converts to this type from the input type.

impl From<f64> for Scalar

Non-nullable Into<Scalar> implementation for T.

fn from(value: f64) -> Self

Converts to this type from the input type.

impl From<i16> for Scalar

Non-nullable Into<Scalar> implementation for T.

fn from(value: i16) -> Self

Converts to this type from the input type.

impl From<i32> for Scalar

Non-nullable Into<Scalar> implementation for T.

fn from(value: i32) -> Self

Converts to this type from the input type.

impl From<i64> for Scalar

Non-nullable Into<Scalar> implementation for T.

fn from(value: i64) -> Self

Converts to this type from the input type.

impl From<i8> for Scalar

Non-nullable Into<Scalar> implementation for T.

fn from(value: i8) -> Self

Converts to this type from the input type.

impl From<u16> for Scalar

Non-nullable Into<Scalar> implementation for T.

fn from(value: u16) -> Self

Converts to this type from the input type.

impl From<u32> for Scalar

Non-nullable Into<Scalar> implementation for T.

fn from(value: u32) -> Self

Converts to this type from the input type.

impl From<u64> for Scalar

Non-nullable Into<Scalar> implementation for T.

fn from(value: u64) -> Self

Converts to this type from the input type.

impl From<u8> for Scalar

Non-nullable Into<Scalar> implementation for T.

fn from(value: u8) -> Self

Converts to this type from the input type.

impl From<usize> for Scalar

fn from(value: usize) -> Self

Converts to this type from the input type.

impl Hash for Scalar

We implement Hash manually to be consistent with PartialEq. Since we ignore nullability in equality comparisons, we must also ignore it when hashing to maintain the invariant that equal values have equal hashes.

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 IndexOrd<Scalar> for dyn Array + '_

fn index_cmp(&self, idx: usize, elem: &Scalar) -> VortexResult<Option<Ordering>>

PartialOrd of the value at index idx with elem. For example, if self[idx] > elem, return Some(Greater).

fn index_len(&self) -> usize

Get the length of the underlying ordered collection

fn index_lt(&self, idx: usize, elem: &V) -> VortexResult<bool>

fn index_le(&self, idx: usize, elem: &V) -> VortexResult<bool>

fn index_gt(&self, idx: usize, elem: &V) -> VortexResult<bool>

fn index_ge(&self, idx: usize, elem: &V) -> VortexResult<bool>

impl PartialEq for Scalar

We implement PartialEq manually because we want to ignore nullability when comparing scalars. Two scalars with the same value but different nullability should be considered equal.

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 Scalar

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

Compares two scalar values for ordering.

Returns

• Some(Ordering) if both scalars have the same data type (ignoring nullability)
• None if the scalars have different data types

Ordering Rules

When types match, the ordering follows these rules:

• Null values are considered less than all non-null values
• Non-null values are compared according to their natural ordering

Examples

// Same types compare successfully
let a = Scalar::primitive(10i32, Nullability::NonNullable);
let b = Scalar::primitive(20i32, Nullability::NonNullable);
assert_eq!(a.partial_cmp(&b), Some(Ordering::Less));

// Different types return None
let int_scalar = Scalar::primitive(10i32, Nullability::NonNullable);
let str_scalar = Scalar::utf8("hello", Nullability::NonNullable);
assert_eq!(int_scalar.partial_cmp(&str_scalar), None);

// Nulls are less than non-nulls
let null = Scalar::null(DType::Primitive(PType::I32, Nullability::Nullable));
let value = Scalar::primitive(0i32, Nullability::Nullable);
assert_eq!(null.partial_cmp(&value), Some(Ordering::Less));

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 TryFrom<&Scalar> for Arc<dyn Datum>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> Result<Arc<dyn Datum>, Self::Error>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for BinaryScalar<'a>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &'a Scalar) -> VortexResult<Self>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for BoolScalar<'a>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &'a Scalar) -> VortexResult<Self>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for ByteBuffer

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: &'a Scalar) -> VortexResult<Self>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for BufferString

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: &'a Scalar) -> VortexResult<Self>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for DecimalScalar<'a>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &'a Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for DecimalValue

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: &Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for ExtScalar<'a>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &'a Scalar) -> VortexResult<Self>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for ListScalar<'a>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &'a Scalar) -> VortexResult<Self>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for Option<ByteBuffer>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: &'a Scalar) -> VortexResult<Self>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for Option<BufferString>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: &'a Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<&Scalar> for Option<DecimalValue>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: &Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<&Scalar> for Option<bool>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<f16>

Fallible conversion from a Scalar into an Option<T>.

Errors

Returns an error if the Scalar is not primitive, or if it is unable to convert the Scalar into the target type.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<f32>

Fallible conversion from a Scalar into an Option<T>.

Errors

Returns an error if the Scalar is not primitive, or if it is unable to convert the Scalar into the target type.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<f64>

Fallible conversion from a Scalar into an Option<T>.

Errors

Returns an error if the Scalar is not primitive, or if it is unable to convert the Scalar into the target type.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<i16>

Fallible conversion from a Scalar into an Option<T>.

Errors

Returns an error if the Scalar is not primitive, or if it is unable to convert the Scalar into the target type.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<i32>

Fallible conversion from a Scalar into an Option<T>.

Errors

Returns an error if the Scalar is not primitive, or if it is unable to convert the Scalar into the target type.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<i64>

Fallible conversion from a Scalar into an Option<T>.

Errors

Returns an error if the Scalar is not primitive, or if it is unable to convert the Scalar into the target type.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<i8>

Fallible conversion from a Scalar into an Option<T>.

Errors

Returns an error if the Scalar is not primitive, or if it is unable to convert the Scalar into the target type.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<u16>

Fallible conversion from a Scalar into an Option<T>.

Errors

Returns an error if the Scalar is not primitive, or if it is unable to convert the Scalar into the target type.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<u32>

Fallible conversion from a Scalar into an Option<T>.

Errors

Returns an error if the Scalar is not primitive, or if it is unable to convert the Scalar into the target type.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<u64>

Fallible conversion from a Scalar into an Option<T>.

Errors

Returns an error if the Scalar is not primitive, or if it is unable to convert the Scalar into the target type.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<u8>

Fallible conversion from a Scalar into an Option<T>.

Errors

Returns an error if the Scalar is not primitive, or if it is unable to convert the Scalar into the target type.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for Option<usize>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for PrimitiveScalar<'a>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &'a Scalar) -> VortexResult<Self>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for String

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &'a Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for StructScalar<'a>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &'a Scalar) -> VortexResult<Self>

Performs the conversion.

impl<'a> TryFrom<&'a Scalar> for Utf8Scalar<'a>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &'a Scalar) -> VortexResult<Self>

Performs the conversion.

impl<'a, T> TryFrom<&'a Scalar> for Vec<T>

where T: for<'b> TryFrom<&'b Scalar, Error = VortexError>,

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &'a Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<&Scalar> for bool

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for f16

Fallible conversion from a Scalar into an T.

Errors

Returns an error if unable to convert the scalar into the target type, or if the Scalar itself is null.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for f32

Fallible conversion from a Scalar into an T.

Errors

Returns an error if unable to convert the scalar into the target type, or if the Scalar itself is null.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for f64

Fallible conversion from a Scalar into an T.

Errors

Returns an error if unable to convert the scalar into the target type, or if the Scalar itself is null.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for i16

Fallible conversion from a Scalar into an T.

Errors

Returns an error if unable to convert the scalar into the target type, or if the Scalar itself is null.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for i32

Fallible conversion from a Scalar into an T.

Errors

Returns an error if unable to convert the scalar into the target type, or if the Scalar itself is null.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for i64

Fallible conversion from a Scalar into an T.

Errors

Returns an error if unable to convert the scalar into the target type, or if the Scalar itself is null.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for i8

Fallible conversion from a Scalar into an T.

Errors

Returns an error if unable to convert the scalar into the target type, or if the Scalar itself is null.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for u16

Fallible conversion from a Scalar into an T.

Errors

Returns an error if unable to convert the scalar into the target type, or if the Scalar itself is null.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for u32

Fallible conversion from a Scalar into an T.

Errors

Returns an error if unable to convert the scalar into the target type, or if the Scalar itself is null.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for u64

Fallible conversion from a Scalar into an T.

Errors

Returns an error if unable to convert the scalar into the target type, or if the Scalar itself is null.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for u8

Fallible conversion from a Scalar into an T.

Errors

Returns an error if unable to convert the scalar into the target type, or if the Scalar itself is null.

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<&Scalar> for usize

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: &Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Scalar> for ByteBuffer

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<Scalar> for BufferString

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Scalar> for DecimalValue

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Scalar> for Option<ByteBuffer>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<Scalar> for Option<BufferString>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Scalar> for Option<DecimalValue>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(scalar: Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Scalar> for Option<bool>

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: Scalar) -> VortexResult<Self>

Performs the conversion.

impl TryFrom<Scalar> for String

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl<T> TryFrom<Scalar> for Vec<T>

where T: for<'b> TryFrom<&'b Scalar, Error = VortexError>,

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: Scalar) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Scalar> for bool

type Error = VortexError

The type returned in the event of a conversion error.

fn try_from(value: Scalar) -> VortexResult<Self>

Performs the conversion.

impl Eq for Scalar