deniskuzZ commented on code in PR #6292:
URL: https://github.com/apache/hive/pull/6292#discussion_r2781493032
##########
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/compaction/IcebergTableOptimizer.java:
##########
@@ -212,6 +202,77 @@ private List<Partition>
findModifiedPartitions(org.apache.hadoop.hive.ql.metadat
}
}
+ /**
+ * Checks if there are any modified partitions (with added or deleted files)
between a given past
+ * snapshot ID and the table's current (latest) snapshot. This method
short-circuits as soon as
+ * it finds any modified partition, making it more efficient than
findModifiedPartitions when
+ * only checking for existence.
+ * @param icebergTable The Iceberg table to inspect.
+ * @param pastSnapshotTimeMil The timestamp in milliseconds of the snapshot
to check from (exclusive).
+ * @param latestSpecOnly when True, checks partitions with the current spec
only;
+ * False - older specs only;
+ * Null - any spec
+ * @return true if at least one modified partition exists, false otherwise.
+ */
+ private boolean hasModifiedPartitions(org.apache.iceberg.Table icebergTable,
Long pastSnapshotTimeMil,
+ Boolean latestSpecOnly) {
+ List<Snapshot> relevantSnapshots = getRelevantSnapshots(icebergTable,
pastSnapshotTimeMil).toList();
+ if (relevantSnapshots.isEmpty()) {
+ return false;
+ }
+
+ try (ExecutorService executor =
Executors.newVirtualThreadPerTaskExecutor()) {
+ // Submit a task for each snapshot and collect the Futures
+ List<Future<Set<String>>> futures = createPartitionNameFutures(
+ executor, icebergTable, relevantSnapshots, latestSpecOnly);
+
+ // Check results as they complete and short-circuit on first non-empty
result
+ for (Future<Set<String>> future : futures) {
Review Comment:
that's not good, blocks in submission order
````
CompletionService<Set<String>> completionService =
new ExecutorCompletionService<>(executor);
int taskCount = createPartitionNameTasks(
completionService, icebergTable, relevantSnapshots, latestSpecOnly);
for (int i = 0; i < taskCount; i++) {
Set<String> partitionNames = completionService.take().get();
if (!partitionNames.isEmpty()) {
return true;
}
}
````
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