Trait FixedLenByteArrayVisitor 

pub(crate) trait FixedLenByteArrayVisitor {
    type Output;

    // Required methods
    fn decimal_length(&self, precision: u8, native_length: usize) -> usize;
    fn values(
        self,
        length: usize,
        fill: impl Fn(usize, &mut [u8]),
    ) -> Result<Self::Output>;
}

Receives the values ArrowWriter stores for an Arrow array in a FIXED_LEN_BYTE_ARRAY column, which are also the values hashed into the column’s bloom filter

visit_fixed_len_byte_array holds the conversion from each Arrow type

Required Associated Types

type Output

Required Methods

fn decimal_length(&self, precision: u8, native_length: usize) -> usize

Returns the length of the values that decimals of precision are stored as

native_length is the length of the Arrow decimal type, for example 16 for Decimal128.

fn values( self, length: usize, fill: impl Fn(usize, &mut [u8]), ) -> Result<Self::Output>

Receives values that are length bytes long

fill(i, value) writes the value at index i of the array to value, which is length zeroed bytes.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors

impl FixedLenByteArrayVisitor for WriteFixedLenByteArray<'_, '_>

type Output = usize