hsiang-c commented on code in PR #2346:
URL: https://github.com/apache/datafusion-comet/pull/2346#discussion_r2331580405


##########
native/core/src/execution/operators/scan.rs:
##########
@@ -239,6 +239,87 @@ impl ScanExec {
 
         let mut timer = arrow_ffi_time.timer();
 
+        // Check for selection vectors and get selection indices if needed from
+        // JVM via FFI
+        // Selection vectors can be provided by, for instance, Iceberg to
+        // remove rows that have been deleted.
+        let selection_indices_arrays = Self::get_selection_indices(&mut env, 
iter, num_cols)?;
+
+        // fetch batch data from JVMi via FFI

Review Comment:
   (nit) `JVMi`?



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