aokolnychyi commented on code in PR #11495:
URL: https://github.com/apache/iceberg/pull/11495#discussion_r1835614371
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core/src/main/java/org/apache/iceberg/MergingSnapshotProducer.java:
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@@ -769,6 +794,82 @@ protected void validateDataFilesExist(
}
}
+ // validates there are no concurrently added DVs for referenced data files
+ protected void validateAddedDVs(
+ TableMetadata base,
+ Long startingSnapshotId,
+ Expression conflictDetectionFilter,
+ Snapshot parent) {
+ // skip if there is no current table state or table format doesn't support
DVs
+ if (parent == null || base.formatVersion() < 3) {
+ return;
+ }
+
+ // skip if this operation doesn't add new DVs
+ Set<String> dvRefs = dvRefs();
+ if (dvRefs.isEmpty()) {
+ return;
+ }
+
+ Pair<List<ManifestFile>, Set<Long>> history =
+ validationHistory(
+ base,
+ startingSnapshotId,
+ VALIDATE_ADDED_DVS_OPERATIONS,
+ ManifestContent.DELETES,
+ parent);
+ List<ManifestFile> newDeleteManifests = history.first();
+ Set<Long> newSnapshotIds = history.second();
+
+ Tasks.foreach(newDeleteManifests)
+ .stopOnFailure()
+ .throwFailureWhenFinished()
+ .executeWith(workerPool())
+ .run(m -> validateAddedDVs(m, conflictDetectionFilter, newSnapshotIds,
dvRefs));
+ }
+
+ private void validateAddedDVs(
+ ManifestFile manifest,
+ Expression conflictDetectionFilter,
+ Set<Long> newSnapshotIds,
+ Set<String> dvRefs) {
+ try (CloseableIterable<ManifestEntry<DeleteFile>> entries =
+ ManifestFiles.readDeleteManifest(manifest, ops.io(),
ops.current().specsById())
+ .filterRows(conflictDetectionFilter)
+ .caseSensitive(caseSensitive)
+ .liveEntries()) {
+
+ for (ManifestEntry<DeleteFile> entry : entries) {
+ DeleteFile file = entry.file();
+ if (newSnapshotIds.contains(entry.snapshotId()) &&
ContentFileUtil.isDV(file)) {
+ ValidationException.check(
+ !dvRefs.contains(file.referencedDataFile()),
+ "Found concurrently added DV for %s: %s",
+ file.referencedDataFile(),
+ ContentFileUtil.dvDesc(file));
+ }
+ }
+ } catch (IOException e) {
+ throw new UncheckedIOException(e);
+ }
+ }
+
+ // builds a set of data file locations referenced by new DVs
+ private Set<String> dvRefs() {
Review Comment:
We need to have `dv` in the name. If so, I'd prefer a shorter var name to
avoid splitting statements on multiple lines.
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