szehon-ho commented on code in PR #6661:
URL: https://github.com/apache/iceberg/pull/6661#discussion_r1123598992


##########
core/src/main/java/org/apache/iceberg/PartitionsTable.java:
##########
@@ -220,21 +251,53 @@ Iterable<Partition> all() {
 
   static class Partition {
     private final StructLike key;
-    private long recordCount;
-    private int fileCount;
     private int specId;
+    private long dataRecordCount;
+    private int dataFileCount;
+
+    private final Set<DeleteFile> equalityDeleteFiles;
+    private final Set<DeleteFile> positionDeleteFiles;

Review Comment:
   So I am not so confident, that if for example you have two FileScanTask, 
returning deletes() that are the same logical file, will the two DeleteFile 
object be different or not?  Java default equals() is instance equality, isnt 
it?  And even if it does work, will break if we implement those at some point.  
Hence the suggestion to use something with established hashCode/equals.



##########
core/src/main/java/org/apache/iceberg/PartitionsTable.java:
##########
@@ -220,21 +251,53 @@ Iterable<Partition> all() {
 
   static class Partition {
     private final StructLike key;
-    private long recordCount;
-    private int fileCount;
     private int specId;
+    private long dataRecordCount;
+    private int dataFileCount;
+
+    private final Set<DeleteFile> equalityDeleteFiles;
+    private final Set<DeleteFile> positionDeleteFiles;

Review Comment:
   So I am not so confident, that if for example you have two FileScanTask, 
returning deletes() that are the same logical file, will the two DeleteFile 
object be different or not?  Java default equals() is instance equality, isnt 
it?  And even if it does work, may break if we implement those at some point.  
Hence the suggestion to use something with established hashCode/equals.



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