kokila-19 commented on code in PR #5724:
URL: https://github.com/apache/hive/pull/5724#discussion_r2273026213
##########
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/IcebergTableUtil.java:
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@@ -590,6 +600,33 @@ public static TransformSpec getTransformSpec(Table table,
String transformName,
return spec;
}
+ public static <T> List<T> readColStats(Table table, Long snapshotId,
Predicate<BlobMetadata> filter) {
+ List<T> colStats = Lists.newArrayList();
+
+ Path statsPath = IcebergTableUtil.getColStatsPath(table, snapshotId);
+ if (statsPath == null) {
+ return colStats;
+ }
+ try (PuffinReader reader =
Puffin.read(table.io().newInputFile(statsPath.toString())).build()) {
+ List<BlobMetadata> blobMetadata = reader.fileMetadata().blobs();
+
+ if (filter != null) {
+ blobMetadata = blobMetadata.stream().filter(filter)
+ .toList();
+ }
+ Iterator<ByteBuffer> it =
Iterables.transform(reader.readAll(blobMetadata), Pair::second).iterator();
+ LOG.info("Using col stats from : {}", statsPath);
+
+ while (it.hasNext()) {
+ byte[] byteBuffer = ByteBuffers.toByteArray(it.next());
+ colStats.add(SerializationUtils.deserialize(byteBuffer));
+ }
+ } catch (Exception e) {
+ LOG.warn(" Unable to read col stats: ", e);
Review Comment:
Nit: There is an extra space at the start of the log message.
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