@@ -360,16 +360,17 @@ Status IcebergTableReader::_init_delete_predicates(const TTableFormatFileDesc& t
             equality_delete_files.push_back(delete_file);
         }
     }
-    // `_delete_rows != nullptr` means DeleteVector is parsed
+    // `_delete_rows != nullptr` means a deletion vector is parsed. Per Iceberg scan planning,
+    // position delete files apply only when there is no deletion vector for the data file.
     if (_delete_rows != nullptr) {
         _position_delete_rows_storage = *_delete_rows;
         _delete_rows = &_position_delete_rows_storage;
+        position_delete_files.clear();
     }
-    // Combine position delete rows from both deletion vector and position delete files, and
-    // initialize equality delete predicates. Position delete files contain row positions of
-    // deleted rows, which can be directly added to `_delete_rows`. Equality delete files contain
-    // values of deleted rows, which require reading the files and building predicates for later
-    // filtering.
+    // Initialize position and equality delete predicates. Position delete files contain row
+    // positions of deleted rows, which can be directly added to `_delete_rows`. Equality delete
+    // files contain values of deleted rows, which require reading the files and building
+    // predicates for later filtering.
     if (!position_delete_files.empty()) {
         RETURN_IF_ERROR(_init_position_delete_rows(position_delete_files));
     }
 
@@ -1788,7 +1788,7 @@ TEST(IcebergV2ReaderTest, IcebergTableReaderAppliesPositionDeleteFile) {
     std::filesystem::remove_all(test_dir);
 }
 
-TEST(IcebergV2ReaderTest, IcebergTableReaderMergesDeletionVectorAndPositionDeleteFiles) {
+TEST(IcebergV2ReaderTest, IcebergTableReaderIgnoresPositionDeleteFilesWhenDeletionVectorPresent) {
     const auto test_dir =
             std::filesystem::temp_directory_path() / "doris_iceberg_delete_files_merge_test";
     std::filesystem::remove_all(test_dir);
@@ -1831,7 +1831,7 @@ TEST(IcebergV2ReaderTest, IcebergTableReaderMergesDeletionVectorAndPositionDelet
                         make_iceberg_position_delete_file(position_delete_path)}));
     ASSERT_TRUE(reader.prepare_split(split_options).ok());
 
-    EXPECT_EQ(read_iceberg_ids(&reader, projected_columns), std::vector<int32_t>({2, 3, 5}));
+    EXPECT_EQ(read_iceberg_ids(&reader, projected_columns), std::vector<int32_t>({2, 3, 4, 5}));
 
     ASSERT_TRUE(reader.close().ok());
     std::filesystem::remove_all(test_dir);
Original file line number	Diff line number	Diff line change
`@@ -360,16 +360,17 @@ Status IcebergTableReader::_init_delete_predicates(const TTableFormatFileDesc& t`
`360`	`360`	`equality_delete_files.push_back(delete_file);`
`361`	`361`	`}`
`362`	`362`	`}`
`363`		- // `_delete_rows != nullptr` means DeleteVector is parsed
	`363`	+ // `_delete_rows != nullptr` means a deletion vector is parsed. Per Iceberg scan planning,
	`364`	`+ // position delete files apply only when there is no deletion vector for the data file.`
`364`	`365`	`if (_delete_rows != nullptr) {`
`365`	`366`	`_position_delete_rows_storage = *_delete_rows;`
`366`	`367`	`_delete_rows = &_position_delete_rows_storage;`
	`368`	`+ position_delete_files.clear();`
`367`	`369`	`}`
`368`		`- // Combine position delete rows from both deletion vector and position delete files, and`
`369`		`- // initialize equality delete predicates. Position delete files contain row positions of`
`370`		- // deleted rows, which can be directly added to `_delete_rows`. Equality delete files contain
`371`		`- // values of deleted rows, which require reading the files and building predicates for later`
`372`		`- // filtering.`
	`370`	`+ // Initialize position and equality delete predicates. Position delete files contain row`
	`371`	+ // positions of deleted rows, which can be directly added to `_delete_rows`. Equality delete
	`372`	`+ // files contain values of deleted rows, which require reading the files and building`
	`373`	`+ // predicates for later filtering.`
`373`	`374`	`if (!position_delete_files.empty()) {`
`374`	`375`	`RETURN_IF_ERROR(_init_position_delete_rows(position_delete_files));`
`375`	`376`	`}`