chenjunjiedada commented on code in PR #8157:
URL: https://github.com/apache/iceberg/pull/8157#discussion_r1275657291


##########
core/src/main/java/org/apache/iceberg/DeleteFileIndex.java:
##########
@@ -66,43 +66,50 @@
  * file.
  */
 class DeleteFileIndex {
+  private static final DeleteFile[] NO_DELETES = new DeleteFile[0];
+
   private final Map<Integer, PartitionSpec> specsById;
   private final Map<Integer, Types.StructType> partitionTypeById;
   private final Map<Integer, ThreadLocal<StructLikeWrapper>> wrapperById;
-  private final long[] globalSeqs;
-  private final DeleteFile[] globalDeletes;
-  private final Map<Pair<Integer, StructLikeWrapper>, Pair<long[], 
DeleteFile[]>>
-      sortedDeletesByPartition;
+  private final DeleteFileGroup globalDeletes;
+  private final Map<Pair<Integer, StructLikeWrapper>, DeleteFileGroup> 
deletesByPartition;
+  private final boolean isEmpty;
 
   DeleteFileIndex(
-      Map<Integer, PartitionSpec> specsById,
+      Map<Integer, PartitionSpec> specs,

Review Comment:
   Do we need to care about style like this later?



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