Struct LargeUtf8 

pub struct LargeUtf8(/* private fields */);

Wrapper denoting Arrow LargeUtf8 values. Use when individual strings can be extremely large or when 64-bit offsets are preferred.

Implementations

impl LargeUtf8

pub fn new(value: String) -> Self

Construct a new LargeUtf8 from a String.

pub fn as_str(&self) -> &str

Return the underlying string slice.

pub fn into_string(self) -> String

Consume and return the underlying String.

Trait Implementations

impl ArrowBinding for LargeUtf8

type Builder = GenericByteBuilder<GenericStringType<i64>>

Concrete Arrow builder type used for this Rust type.

type Array = GenericByteArray<GenericStringType<i64>>

Concrete Arrow array type produced by finish.

fn data_type() -> DataType

The Arrow DataType corresponding to this Rust type.

fn new_builder(capacity: usize) -> Self::Builder

Create a new builder with an optional capacity hint.

fn estimated_bytes_per_value() -> usize

Estimated bytes per value for variable-length types (String, Binary, etc.). Returns 0 for fixed-size types. Used to pre-allocate buffer space.

fn append_value(b: &mut Self::Builder, v: &Self)

Append a non-null value to the builder.

fn append_null(b: &mut Self::Builder)

Append a null to the builder.

fn finish(b: Self::Builder) -> Self::Array

Finish the builder and produce a typed Arrow array.

impl ArrowBindingView for LargeUtf8

Available on crate feature views only.

type Array = GenericByteArray<GenericStringType<i64>>

The Arrow array type this view reads from.

type View<'a> = &'a str

The borrowed view type returned when accessing array elements. For example: &'a str for StringArray, i64 for Int64Array.

fn get_view( array: &Self::Array, index: usize, ) -> Result<Self::View<'_>, ViewAccessError>

Extract a view at the given index from the array.

impl From<&str> for LargeUtf8

fn from(s: &str) -> Self

Convert a &str into a LargeUtf8 by allocating a String.

impl From<String> for LargeUtf8

fn from(value: String) -> Self

Convert a String into a LargeUtf8.