difin commented on code in PR #5957:
URL: https://github.com/apache/hive/pull/5957#discussion_r2214412566
##########
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/compaction/IcebergTableOptimizer.java:
##########
@@ -165,4 +189,76 @@ private void addCompactionTargetIfEligible(Table table,
org.apache.iceberg.Table
ci.type = compactionEvaluator.determineCompactionType();
compactions.add(ci);
}
+
+ /**
+ * Finds all unique non-compaction-modified partitions (with added or
deleted files) between a given past
+ * snapshot ID and the table's current (latest) snapshot.
+ * @param hiveTable The {@link org.apache.hadoop.hive.ql.metadata.Table}
instance to inspect.
+ * @param pastSnapshotTimeMil The timestamp in milliseconds of the snapshot
to check from (exclusive).
+ * @param latestSpecOnly when True, returns partitions with the current spec
only;
+ * False - older specs only;
+ * Null - any spec
+ * @return A List of {@link org.apache.hadoop.hive.ql.metadata.Partition}
representing the unique modified
+ * partition names.
+ * @throws IllegalArgumentException if snapshot IDs are invalid or out of
order, or if the table has no current
+ * snapshot.
+ */
+ private List<Partition>
findModifiedPartitions(org.apache.hadoop.hive.ql.metadata.Table hiveTable,
+ org.apache.iceberg.Table icebergTable, Long pastSnapshotTimeMil, Boolean
latestSpecOnly) {
+
+ List<Snapshot> relevantSnapshots = getRelevantSnapshots(icebergTable,
pastSnapshotTimeMil).toList();
+ if (relevantSnapshots.isEmpty()) {
+ return Collections.emptyList();
+ }
+
+ try (ExecutorService executor =
Executors.newVirtualThreadPerTaskExecutor()) {
+ // Submit a task for each snapshot and collect the Futures
+ List<Future<Set<String>>> futures = relevantSnapshots.stream()
+ .map(snapshot -> executor.submit(() -> {
+ FileIO io = icebergTable.io();
+ List<ContentFile<?>> affectedFiles =
FluentIterable.<ContentFile<?>>concat(
+ snapshot.addedDataFiles(io),
+ snapshot.removedDataFiles(io),
+ snapshot.addedDeleteFiles(io),
+ snapshot.removedDeleteFiles(io))
+ .toList();
+ return IcebergTableUtil.getPartitionNames(icebergTable,
affectedFiles, latestSpecOnly);
+ }))
+ .toList();
+
+ // Collect the results from all completed futures
+ Set<String> modifiedPartitions = Sets.newHashSet();
+ for (Future<Set<String>> future : futures) {
+ modifiedPartitions.addAll(future.get());
+ }
+
+ return IcebergTableUtil.convertNameToMetastorePartition(hiveTable,
modifiedPartitions);
+ } catch (InterruptedException | ExecutionException e) {
+ throw new RuntimeMetaException(e, "Failed to find modified partitions in
parallel");
+ }
+ }
+
+ /**
+ * Checks if a table has had new commits since a given snapshot that were
not caused by compaction.
+ * @param icebergTable The Iceberg table to check.
+ * @param pastSnapshotTimeMil The timestamp in milliseconds of the snapshot
to check from (exclusive).
+ * @return true if at least one non-compaction snapshot exists since the
pastSnapshotTimeMil
+ * whose source is not compaction, false otherwise.
+ */
+ private boolean hasNewCommits(org.apache.iceberg.Table icebergTable, Long
pastSnapshotTimeMil) {
+ return getRelevantSnapshots(icebergTable, pastSnapshotTimeMil)
+ .findAny().isPresent();
+ }
+
+ private Stream<Snapshot> getRelevantSnapshots(org.apache.iceberg.Table
icebergTable, Long pastSnapshotTimeMil) {
+ Snapshot currentSnapshot = icebergTable.currentSnapshot();
+ if (currentSnapshot == null ||
Objects.equals(currentSnapshot.timestampMillis(), pastSnapshotTimeMil)) {
+ return Stream.empty();
+ }
+
+ return StreamSupport.stream(icebergTable.snapshots().spliterator(), false)
Review Comment:
`icebergTable.snapshots()` returns `Iterable<Snapshot>` and it doesn't have`
.stream()` method..
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