rdblue commented on code in PR #12593:
URL: https://github.com/apache/iceberg/pull/12593#discussion_r2011047304


##########
core/src/main/java/org/apache/iceberg/SnapshotProducer.java:
##########
@@ -283,32 +284,55 @@ public Snapshot apply() {
       throw new RuntimeIOException(e, "Failed to write manifest list file");
     }
 
+    Map<String, String> summary = summary();
+    String operation = operation();
+
     Long addedRows = null;
-    Long lastRowId = null;
-    if (base.rowLineageEnabled()) {
-      addedRows = calculateAddedRows(manifests);
-      lastRowId = base.nextRowId();
+    Long firstRowId = null;
+    if (base.formatVersion() >= 3) {
+      addedRows = calculateAddedRows(operation, summary, manifests);
+      firstRowId = base.nextRowId();
     }
 
     return new BaseSnapshot(
         sequenceNumber,
         snapshotId(),
         parentSnapshotId,
         System.currentTimeMillis(),
-        operation(),
-        summary(base),
+        operation,
+        summaryWithTotals(base, summary),
         base.currentSchemaId(),
         manifestList.location(),
-        lastRowId,
+        firstRowId,
         addedRows);
   }
 
-  private Long calculateAddedRows(List<ManifestFile> manifests) {
+  private Long calculateAddedRows(
+      String operation, Map<String, String> summary, List<ManifestFile> 
manifests) {
+    if (summary != null) {
+      long addedRecords =
+          PropertyUtil.propertyAsLong(summary, 
SnapshotSummary.ADDED_RECORDS_PROP, 0L);

Review Comment:
   When the summary is defined, we trust the added-records and deleted-records 
values, which should match the counts calculated below.
   
   I also added a check to handle the `DataOperations.REPLACE` case. For a 
replace, the added records should always be 0. If we want, we can also add 
checks for data file metadata that assert there are no null values for the 
`_row_id` column. What do you think @RussellSpitzer?



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