PiyushHurpadeDremio commented on a change in pull request #2182:
URL: https://github.com/apache/iceberg/pull/2182#discussion_r567571695
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File path: core/src/main/java/org/apache/iceberg/MergingSnapshotProducer.java
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@@ -494,6 +499,48 @@ private ManifestFile newDeleteFilesAsManifest() {
return cachedNewDeleteManifest;
}
+ @Override
+ protected Map<Integer, String> updatePartitionStats() {
+ Map<Integer, String> newPartitionStatsLocations = new HashMap<>();
+
+ int currentSpecID = ops.current().spec().specId();
+
+ /**
+ * Update Partition Stats for Delete operation
+ */
+ PartitionStatsMap deletePartitionStatsMap =
filterManager.getPartitionStatsMap();
+ deletePartitionStatsMap.getAllUpdatedPartitionSpec().forEach(
+ specId -> {
+ if (specId != currentSpecID) {
+ List<PartitionStatsEntry> statsEntries =
getOldPartitionStatsBySpec(specId);
+ PartitionsTable.PartitionMap parMap =
deletePartitionStatsMap.getPartitionMap(specId);
+ parMap.subtractFromPartitionStatsEntries(statsEntries);
+ OutputFile outputFile = newPartitionStatsFile(specId);
+ newPartitionStatsLocations.put(specId, outputFile.location());
+ writePartitionStatsEntries(parMap.getAllPartitionStatsEntries(),
outputFile, specId);
Review comment:
We are re-using partition stats from the previous snapshot only. this
loop iterate over only specifications that got updated as a part of
deleteFile(CharSequence path), deleteFile(DataFile file),
deleteFromRowFilter(Expression expr) operation.
deletePartitionStatsMap.getAllUpdatedPartitionSpec() this will return only
partition specifications that got updated.
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