Struct arrow::builder::BinaryArrayBuilder

pub struct BinaryArrayBuilder { /* fields omitted */ }

Array builder for BinaryArray

Methods

impl BinaryArrayBuilder

pub fn new(capacity: usize) -> Self

Creates a new BinaryArrayBuilder, capacity is the number of bytes in the values array

pub fn push(&mut self, value: u8) -> Result<()>

Pushes a single byte value into the builder's values array.

Note, when pushing individual byte values you must call append to delimit each distinct list value.

pub fn push_string(&mut self, value: &str) -> Result<()>

Pushes a &String or &str into the builder.

Automatically calls the append method to delimit the string pushed in as a distinct array element.

pub fn append(&mut self, is_valid: bool) -> Result<()>

Finish the current variable-length list array slot.

Trait Implementations

impl ArrayBuilder for BinaryArrayBuilder

type ArrayType = BinaryArray

The type of array that this builder creates

fn into_any(self) -> Box<dyn Any>

Returns the builder as an owned Any type so that it can be downcast to a specific implementation before calling it's finish method.

fn len(&self) -> usize

Returns the number of array slots in the builder

fn finish(self) -> BinaryArray

Builds the BinaryArray