xanderbailey commented on code in PR #2398:
URL: https://github.com/apache/iceberg-rust/pull/2398#discussion_r3978494399
##########
crates/iceberg/src/arrow/reader/pipeline.rs:
##########
@@ -692,6 +721,69 @@ impl FileScanTaskReader {
Ok(Box::pin(record_batch_stream) as ArrowRecordBatchStream)
}
+
+ /// Reads bloom filters for relevant columns and evaluates the predicate
+ /// against them to filter out row groups that definitely don't match.
+ async fn filter_row_groups_by_bloom_filter(
+ predicate: &crate::expr::BoundPredicate,
+ builder: &mut ParquetRecordBatchStreamBuilder<ArrowFileReader>,
+ candidate_row_groups: &[usize],
+ field_id_map: &HashMap<i32, usize>,
+ ) -> Result<Vec<usize>> {
+ // Only collect field IDs from eq/in predicates — the only types
+ // bloom filters can help with. Skip columns not in the parquet schema.
+ let bloom_filter_field_ids: Vec<i32> =
collect_bloom_filter_field_ids(predicate)?
+ .into_iter()
+ .filter(|id| field_id_map.contains_key(id))
+ .collect();
+
+ if bloom_filter_field_ids.is_empty() {
+ return Ok(candidate_row_groups.to_vec());
+ }
+
+ let mut result = Vec::with_capacity(candidate_row_groups.len());
+
+ for &rg_idx in candidate_row_groups {
Review Comment:
Ah, https://github.com/apache/arrow-rs/pull/8462/changes is what we need.
I'll create an issue to track a follow-up
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
