sdd commented on code in PR #1017:
URL: https://github.com/apache/iceberg-rust/pull/1017#discussion_r2179403667


##########
crates/iceberg/src/arrow/caching_delete_file_loader.rs:
##########
@@ -308,28 +319,231 @@ impl CachingDeleteFileLoader {
         Ok(result)
     }
 
-    /// Parses record batch streams from individual equality delete files
-    ///
-    /// Returns an unbound Predicate for each batch stream
     async fn parse_equality_deletes_record_batch_stream(
-        streams: ArrowRecordBatchStream,
+        mut stream: ArrowRecordBatchStream,
+        equality_ids: HashSet<i32>,
     ) -> Result<Predicate> {
-        // TODO
+        let mut result_predicate = AlwaysTrue;
+
+        while let Some(record_batch) = stream.next().await {
+            let record_batch = record_batch?;
+
+            if record_batch.num_columns() == 0 {
+                return Ok(AlwaysTrue);
+            }
+
+            let batch_schema_arrow = record_batch.schema();
+            let batch_schema_iceberg = 
arrow_schema_to_schema(batch_schema_arrow.as_ref())?;
+
+            let mut datum_columns_with_names: Vec<_> = record_batch
+                .columns()
+                .iter()
+                .zip(batch_schema_iceberg.as_struct().fields())
+                // only use columns that are in the set of equality_ids for 
this delete file
+                .filter(|(field, value)| equality_ids.contains(&value.id))

Review Comment:
   I've fixed this, thanks!



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