jdockerty commented on code in PR #2176:
URL: https://github.com/apache/iceberg-rust/pull/2176#discussion_r2890564559
##########
crates/iceberg/src/arrow/reader.rs:
##########
@@ -513,14 +522,51 @@ impl ArrowReader {
.with_preload_page_index(should_load_page_index);
if let Some(hint) = metadata_size_hint {
- parquet_file_reader =
parquet_file_reader.with_metadata_size_hint(hint);
+ reader = reader.with_metadata_size_hint(hint);
}
- // Create the record batch stream builder, which wraps the parquet
file reader
- let options = arrow_reader_options.unwrap_or_default();
- let record_batch_stream_builder =
-
ParquetRecordBatchStreamBuilder::new_with_options(parquet_file_reader,
options).await?;
- Ok(record_batch_stream_builder)
+ let arrow_metadata = ArrowReaderMetadata::load_async(&mut reader,
Default::default())
+ .await
+ .map_err(|e| {
+ Error::new(ErrorKind::Unexpected, "Failed to load Parquet
metadata").with_source(e)
+ })?;
+
+ Ok(Arc::clone(arrow_metadata.metadata()))
+ }
+
+ pub(crate) async fn create_parquet_record_batch_stream_builder(
+ data_file_path: &str,
+ file_io: FileIO,
+ should_load_page_index: bool,
+ arrow_reader_options: ArrowReaderOptions,
+ file_size_in_bytes: u64,
+ parquet_metadata: Arc<ParquetMetaData>,
+ ) -> Result<ParquetRecordBatchStreamBuilder<ArrowFileReader>> {
+ let arrow_reader_metadata =
+ ArrowReaderMetadata::try_new(parquet_metadata,
arrow_reader_options).map_err(|e| {
+ Error::new(
+ ErrorKind::Unexpected,
+ "Failed to create ArrowReaderMetadata from
ParquetMetaData",
+ )
+ .with_source(e)
+ })?;
+
+ let parquet_file = file_io.new_input(data_file_path)?;
+ let parquet_reader = parquet_file.reader().await?;
+ let parquet_file_reader = ArrowFileReader::new(
+ FileMetadata {
+ size: file_size_in_bytes,
+ },
+ parquet_reader,
+ )
+ .with_preload_column_index(true)
+ .with_preload_offset_index(true)
Review Comment:
I'm not super familiar with the depth of details in Parquet, but are these
universal enough to be a sane default?
Can you explain the decision on these being hard-coded to `true`? Where as
the `page_index` being pre-loaded is decided by the callee with
`should_load_page_index`
##########
crates/iceberg/src/arrow/reader.rs:
##########
@@ -490,19 +501,17 @@ impl ArrowReader {
Ok(Box::pin(record_batch_stream) as ArrowRecordBatchStream)
}
- pub(crate) async fn create_parquet_record_batch_stream_builder(
+ /// Loads Parquet metadata from storage, handling file size optimization.
+ pub(crate) async fn load_parquet_metadata(
data_file_path: &str,
- file_io: FileIO,
+ file_io: &FileIO,
should_load_page_index: bool,
- arrow_reader_options: Option<ArrowReaderOptions>,
Review Comment:
How come the options are being removed here?
It seems that this forces the `Default::default()` usage below at all times,
instead of allowing reader options to be provided, is that intended?
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