Struct BinaryCopyEncoder 

pub struct BinaryCopyEncoder { /* private fields */ }

Encoder for binary COPY IN format.

Builds a buffer containing the binary header, tuple data, and trailer.

Example

use sentinel_driver::copy::binary::BinaryCopyEncoder;

let mut encoder = BinaryCopyEncoder::new();

// Write a row with two columns: int4(42) and text("hello")
encoder.begin_row(2);
encoder.write_field(&42i32.to_be_bytes());
encoder.write_field(b"hello");

// Write another row with a NULL second column
encoder.begin_row(2);
encoder.write_field(&7i32.to_be_bytes());
encoder.write_null();

let data = encoder.finish();
// data can be sent via CopyIn::write_raw()

Implementations

impl BinaryCopyEncoder

pub fn new() -> Self

pub fn begin_row(&mut self, field_count: i16)

Begin a new row with the given number of fields.

pub fn write_field(&mut self, data: &[u8])

Write a non-NULL field value (already in binary PG format).

pub fn write_null(&mut self)

Write a NULL field.

pub fn finish(self) -> Vec<u8>

Finish encoding and return the complete binary COPY data.

Appends the trailer (field_count = -1).

pub fn len(&self) -> usize

Get the current buffer size.

pub fn is_empty(&self) -> bool

Trait Implementations

impl Default for BinaryCopyEncoder

fn default() -> Self

Returns the “default value” for a type.