rdblue commented on code in PR #4578:
URL: https://github.com/apache/iceberg/pull/4578#discussion_r863331581
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core/src/main/java/org/apache/iceberg/RemoveSnapshots.java:
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@@ -163,21 +188,100 @@ private TableMetadata internalApply() {
this.base = ops.refresh();
Set<Long> idsToRetain = Sets.newHashSet();
- List<Long> ancestorIds = SnapshotUtil.ancestorIds(base.currentSnapshot(),
base::snapshot);
- if (minNumSnapshots >= ancestorIds.size()) {
+ // Identify refs that should be removed
+ Set<String> expiredRefs = computeExpiredRefs(base.refs());
+ Set<Long> idsOfRetainedRefs = base.refs().entrySet().stream()
+ .filter(ref -> !expiredRefs.contains(ref.getKey()))
+ .map(refEntry -> refEntry.getValue().snapshotId())
+ .collect(Collectors.toSet());
+
+ for (Long idToRemove : idsToRemove) {
Review Comment:
Try to use primitives where possible. Here, you know that each ref had a
non-null snapshot ID, so you know all of these are going to be non-null.
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