liurenjie1024 commented on code in PR #1369:
URL: https://github.com/apache/iceberg-rust/pull/1369#discussion_r2111508289


##########
crates/iceberg/src/expr/visitors/manifest_evaluator.rs:
##########
@@ -154,9 +155,19 @@ impl BoundPredicateVisitor for ManifestFilterVisitor<'_> {
         _predicate: &BoundPredicate,
     ) -> crate::Result<bool> {
         let field = self.field_summary_for_reference(reference);
+
         match &field.lower_bound {
-            Some(bound) if datum <= bound => ROWS_CANNOT_MATCH,
-            Some(_) => ROWS_MIGHT_MATCH,
+            Some(bound_bytes) => {
+                let bound = ManifestFilterVisitor::bytes_to_datum(

Review Comment:
   The cost dependends on the type, but I think it's fine for now since it's 
not supposed to be quite expensive.



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