Trait ScalarTruncation 

pub trait ScalarTruncation: Send + Sized {
    // Required methods
    fn from_scalar(value: Scalar) -> VortexResult<Option<Self>>;
    fn len(&self) -> usize;
    fn into_scalar(self, nullability: Nullability) -> Scalar;
    fn upper_bound(self, max_length: usize) -> Option<Self>;
    fn lower_bound(self, max_length: usize) -> Self;
}

A trait for truncating Scalars to a given length in bytes.

Required Methods

fn from_scalar(value: Scalar) -> VortexResult<Option<Self>>

Unwrap a Scalar into a ScalarTruncation object

Errors

If the scalar doesn’t match the truncations dtype.

fn len(&self) -> usize

The length of the value in bytes.

fn into_scalar(self, nullability: Nullability) -> Scalar

Convert the value into a Scalar with the given nullability.

fn upper_bound(self, max_length: usize) -> Option<Self>

Constructs the next Scalar at most max_length bytes that’s lexicographically greater than this.

Returns None if the value is null or if constructing a greater value would overflow.

fn lower_bound(self, max_length: usize) -> Self

Construct a ByteBuffer at most max_length in size that’s less than or equal to ourselves.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl ScalarTruncation for BufferString

fn upper_bound(self, max_length: usize) -> Option<Self>

Constructs the next BufferString at most max_length bytes that’s lexicographically greater than this.

Returns None if the value is null or if constructing a greater value would overflow.

fn lower_bound(self, max_length: usize) -> Self

Construct a BufferString at most max_length in size that’s less than or equal to ourselves.

fn from_scalar(value: Scalar) -> VortexResult<Option<Self>>

fn len(&self) -> usize

fn into_scalar(self, nullability: Nullability) -> Scalar

impl ScalarTruncation for ByteBuffer

fn from_scalar(value: Scalar) -> VortexResult<Option<Self>>

fn len(&self) -> usize

fn into_scalar(self, nullability: Nullability) -> Scalar

fn upper_bound(self, max_length: usize) -> Option<Self>

fn lower_bound(self, max_length: usize) -> Self

Implementors