simhadri-g commented on code in PR #4431:
URL: https://github.com/apache/hive/pull/4431#discussion_r1267241531
##########
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/HiveIcebergStorageHandler.java:
##########
@@ -457,17 +462,20 @@ public List<ColumnStatisticsObj>
getColStatistics(org.apache.hadoop.hive.ql.meta
Table table = IcebergTableUtil.getTable(conf, hmsTable.getTTable());
String statsPath = getStatsPath(table).toString();
LOG.info("Using stats from puffin file at: {}", statsPath);
+ return readColStats(table, statsPath).equals(null) ? null :
readColStats(table, statsPath).getStatsObj();
+ }
+
+ private ColumnStatistics readColStats(Table table, String statsPath) {
try (PuffinReader reader =
Puffin.read(table.io().newInputFile(statsPath)).build()) {
List<BlobMetadata> blobMetadata = reader.fileMetadata().blobs();
- Map<BlobMetadata, List<ColumnStatistics>> collect =
-
Streams.stream(reader.readAll(blobMetadata)).collect(Collectors.toMap(Pair::first,
- blobMetadataByteBufferPair -> SerializationUtils.deserialize(
-
ByteBuffers.toByteArray(blobMetadataByteBufferPair.second()))));
- return collect.get(blobMetadata.get(0)).get(0).getStatsObj();
+ Map<BlobMetadata, List<ColumnStatistics>> collect =
Streams.stream(reader.readAll(blobMetadata)).collect(
+ Collectors.toMap(Pair::first, blobMetadataByteBufferPair ->
SerializationUtils.deserialize(
+ ByteBuffers.toByteArray(blobMetadataByteBufferPair.second()))));
+ return collect.get(blobMetadata.get(0)).get(0);
Review Comment:
We first get the blob metadata:
This is a List that will contain all the blobs. Currently we are writing all
stats to only one blob. Therefore we get the blobmetadata at index 0;
Next using this blobmetadata info as key , we get the the array list.
Currently its just one element in this list.
Map<BlobMetadata, List<ColumnStatistics>>
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