Struct EventStreamWriter 

pub struct EventStreamWriter {}

Emits AWS event-stream binary frames for a Select response. Each frame is [total_len BE u32][headers_len BE u32][prelude CRC32][headers...][payload][message CRC32].

Header value type is fixed at 7 (UTF-8 string). Headers always emitted: :event-type, :message-type, plus :content-type for payload-bearing frames (Records / Stats).

Implementations

impl EventStreamWriter

pub fn new() -> Self

pub fn records(&mut self, payload: &[u8]) -> Vec<u8>

Build a Records frame. payload is the (optionally empty) body chunk — typically a CSV / JSON-Lines slab of one or more output rows. AWS allows splitting a logical record across frames.

pub fn stats(&mut self, scanned: u64, processed: u64, returned: u64) -> Vec<u8>

Build a Stats frame containing the standard BytesScanned / BytesProcessed / BytesReturned XML payload.

pub fn end(&mut self) -> Vec<u8>

Build the terminating End frame. Clients must wait for this before assuming the response stream is complete.

Trait Implementations

impl Debug for EventStreamWriter

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for EventStreamWriter

fn default() -> EventStreamWriter

Returns the “default value” for a type.