gaborkaszab commented on code in PR #6074:
URL: https://github.com/apache/iceberg/pull/6074#discussion_r1050562294


##########
core/src/main/java/org/apache/iceberg/SnapshotManager.java:
##########
@@ -30,6 +31,17 @@ public class SnapshotManager implements ManageSnapshots {
         ops.current() != null, "Cannot manage snapshots: table %s does not 
exist", tableName);
     this.transaction =
         new BaseTransaction(tableName, ops, 
BaseTransaction.TransactionType.SIMPLE, ops.refresh());
+    this.isExternalTransaction = false;
+  }
+
+  SnapshotManager(BaseTransaction transaction) {
+    Preconditions.checkNotNull(transaction, "Input transaction cannot be 
null");
+    Preconditions.checkNotNull(

Review Comment:
   Ohh, I totally misunderstood your comment then, and writing such a long 
answer wasn't necessary at all :)
   
   This precondition is let's say partially intentional as I wanted to follow 
the existing constructor that has a [similar 
check](https://github.com/apache/iceberg/blob/c07f2aabc0a1d02f068ecf1514d2479c0fbdd3b0/core/src/main/java/org/apache/iceberg/SnapshotManager.java#L29).
 
   After giving this a thought this check might make sense as everything in 
SnapshotManager requires snapshot IDs or branch names that we won't have with a 
createTransaction().



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