rdblue commented on a change in pull request #4082:
URL: https://github.com/apache/iceberg/pull/4082#discussion_r803831394
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File path: core/src/main/java/org/apache/iceberg/TableMetadata.java
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@@ -725,6 +728,21 @@ private static SortOrder freshSortOrder(int orderId,
Schema schema, SortOrder so
return builder.build();
}
+ private Map<String, SnapshotRef> validateRefs(Map<String, SnapshotRef>
inputRefs) {
+ for (Map.Entry<String, SnapshotRef> refEntry : inputRefs.entrySet()) {
+ String refName = refEntry.getKey();
+ SnapshotRef ref = refEntry.getValue();
+ if (ref.snapshotId() == -1) {
+ Preconditions.checkArgument(refName.equals(SnapshotRef.MAIN_BRANCH),
+ "Snapshot ref %s refers to snapshot id -1. Only main can refer to
-1", refName);
Review comment:
I agree. We should not explicitly track -1, but when the current
snapshot is requested we can return null if there is no `main`. And we should
keep `current-snapshot-id` up to date for older readers.
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