liurenjie1024 commented on code in PR #1578:
URL: https://github.com/apache/iceberg-rust/pull/1578#discussion_r2251044451


##########
crates/iceberg/src/delete_vector.rs:
##########
@@ -43,6 +43,14 @@ impl DeleteVector {
         self.inner.insert(pos)
     }
 
+    /// Return whether append positions into delete vectors succeeds.
+    #[allow(dead_code)]
+    pub fn append_positions(&mut self, positions: &[u64]) -> bool {
+        let expected_num = positions.len();
+        let appended_num = 
self.inner.append(positions.iter().copied()).unwrap();
+        appended_num as usize == expected_num

Review Comment:
   This definition seems odd to me, which treats insertation with duplication 
as a failure. I would suggest to return nothing. 



##########
crates/iceberg/src/delete_vector.rs:
##########
@@ -43,6 +43,14 @@ impl DeleteVector {
         self.inner.insert(pos)
     }
 
+    /// Return whether append positions into delete vectors succeeds.
+    #[allow(dead_code)]
+    pub fn append_positions(&mut self, positions: &[u64]) -> bool {

Review Comment:
   ```suggestion
       pub fn insert_positions(&mut self, positions: &[u64]) -> bool {
   ```
   



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