Trait ScalarArg 

pub trait ScalarArg<'v>: Sized {
    // Required method
    fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>;
}

Read and write views over a single column of a DataChunkHandle, plus the ScalarArg/ScalarRet marshalling traits. A Rust type readable from one row of a VectorRef.

Required Methods

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

Reads the value at row from v.

Errors

Returns an error if the value cannot be converted to Self.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<'v, T: ScalarArg<'v>> ScalarArg<'v> for Option<T>

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for &'v str

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for String

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for bool

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for f32

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for f64

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for i8

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for i16

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for i32

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for i64

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for i128

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for u8

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for u16

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for u32

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for u64

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

impl<'v> ScalarArg<'v> for u128

fn read(v: &VectorRef<'v>, row: usize) -> UdfResult<Self>

Implementors