nathaniel-d-ef commented on code in PR #8371:
URL: https://github.com/apache/arrow-rs/pull/8371#discussion_r2360831610
##########
arrow-avro/src/writer/encoder.rs:
##########
@@ -600,9 +601,22 @@ impl RecordEncoder {
/// Encode a `RecordBatch` using this encoder plan.
///
/// Tip: Wrap `out` in a `std::io::BufWriter` to reduce the overhead of
many small writes.
- pub fn encode<W: Write>(&self, out: &mut W, batch: &RecordBatch) ->
Result<(), ArrowError> {
+ pub fn encode<W: Write>(
+ &self,
+ out: &mut W,
+ batch: &RecordBatch,
+ prefix: Option<&[u8]>,
+ ) -> Result<(), ArrowError> {
let mut column_encoders = self.prepare_for_batch(batch)?;
for row in 0..batch.num_rows() {
+ if let Some(prefix) = prefix {
+ if !prefix.is_empty() {
+ out.write_all(prefix).map_err(|e| {
+ ArrowError::IoError(format!("write single-object
prefix: {e}"), e)
+ })?;
+ }
+ }
+
for encoder in column_encoders.iter_mut() {
encoder.encode(out, row)?;
}
Review Comment:
Pushed this up too, good shout.
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