Function batch_hash_codes

crates/paimon/src/spec/binary_row.rs:1143–1150

Batch-compute Murmur3 hash codes for all rows. Returns one `i32` per row, identical to calling `BinaryRow::from_arrow(batch, row_idx, field_indices, fields).hash_code()` for each row, but with O(F) column downcasts instead of O(N*F).

(
    batch: &RecordBatch,
    field_indices: &[usize],
    fields: &[crate::spec::DataField],
)

/// `BinaryRow::from_arrow(batch, row_idx, field_indices, fields).hash_code()`
/// for each row, but with O(F) column downcasts instead of O(N*F).
pub fn batch_hash_codes(
    batch: &RecordBatch,
    field_indices: &[usize],
    fields: &[crate::spec::DataField],
) -> crate::Result<Vec<i32>> {
    let rows = batch_build_binary_rows(batch, field_indices, fields)?;
    Ok(rows.into_iter().map(|r| r.hash_code()).collect())
}

#[cfg(test)]
mod tests {