Fokko commented on code in PR #61:
URL: https://github.com/apache/iceberg-python/pull/61#discussion_r1383319743


##########
pyiceberg/table/snapshots.py:
##########
@@ -116,3 +144,202 @@ class MetadataLogEntry(IcebergBaseModel):
 class SnapshotLogEntry(IcebergBaseModel):
     snapshot_id: int = Field(alias="snapshot-id")
     timestamp_ms: int = Field(alias="timestamp-ms")
+
+
+class SnapshotSummaryCollector:
+    added_size: int
+    removed_size: int
+    added_files: int
+    removed_files: int
+    added_eq_delete_files: int
+    removed_eq_delete_files: int
+    added_pos_delete_files: int
+    removed_pos_delete_files: int
+    added_delete_files: int
+    removed_delete_files: int
+    added_records: int
+    deleted_records: int
+    added_pos_deletes: int
+    removed_pos_deletes: int
+    added_eq_deletes: int
+    removed_eq_deletes: int
+
+    def __init__(self) -> None:
+        self.added_size = 0
+        self.removed_size = 0
+        self.added_files = 0
+        self.removed_files = 0
+        self.added_eq_delete_files = 0
+        self.removed_eq_delete_files = 0
+        self.added_pos_delete_files = 0
+        self.removed_pos_delete_files = 0
+        self.added_delete_files = 0
+        self.removed_delete_files = 0
+        self.added_records = 0
+        self.deleted_records = 0
+        self.added_pos_deletes = 0
+        self.removed_pos_deletes = 0
+        self.added_eq_deletes = 0
+        self.removed_eq_deletes = 0
+
+    def add_file(self, data_file: DataFile) -> None:
+        self.added_size += data_file.file_size_in_bytes
+
+        if data_file.content == DataFileContent.DATA:
+            self.added_files += 1
+            self.added_records += data_file.record_count
+        elif data_file.content == DataFileContent.POSITION_DELETES:
+            self.added_delete_files += 1
+            self.added_pos_delete_files += 1
+            self.added_pos_deletes += data_file.record_count
+        elif data_file.content == DataFileContent.EQUALITY_DELETES:
+            self.added_delete_files += 1
+            self.added_eq_delete_files += 1
+            self.added_eq_deletes += data_file.record_count
+        else:
+            raise ValueError(f"Unknown data file content: {data_file.content}")
+
+    def removed_file(self, data_file: DataFile) -> None:
+        self.removed_size += data_file.file_size_in_bytes
+
+        if data_file.content == DataFileContent.DATA:
+            self.removed_files += 1
+            self.deleted_records += data_file.record_count
+        elif data_file.content == DataFileContent.POSITION_DELETES:
+            self.removed_delete_files += 1
+            self.removed_pos_delete_files += 1
+            self.removed_pos_deletes += data_file.record_count
+        elif data_file.content == DataFileContent.EQUALITY_DELETES:
+            self.removed_delete_files += 1
+            self.removed_eq_delete_files += 1
+            self.removed_eq_deletes += data_file.record_count
+        else:
+            raise ValueError(f"Unknown data file content: {data_file.content}")
+
+    def added_manifest(self, manifest: ManifestFile) -> None:

Review Comment:
   I'm also okay with going with normal appends instead of fast-appends. I've 
removed the method.



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