deniskuzZ commented on code in PR #5529:
URL: https://github.com/apache/hive/pull/5529#discussion_r1861808232
##########
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/IcebergTableUtil.java:
##########
@@ -458,6 +458,52 @@ public static List<DeleteFile> getDeleteFiles(Table table,
String partitionPath)
t -> ((PositionDeletesScanTask) t).file()));
}
+ public static float getFileSizeRatio(Table table, String partitionPath, long
fileSizeInBytesThreshold) {
+ long uncompactedFilesCount = getDataFileCount(table, partitionPath,
fileSizeInBytesThreshold, true);
+ long compactedFilesCount = getDataFileCount(table, partitionPath,
fileSizeInBytesThreshold, false);
+
+ if (uncompactedFilesCount == 0) {
+ return 0;
+ } else if (compactedFilesCount == 0) {
+ return 1;
+ } else {
+ return uncompactedFilesCount * 1.0f / (uncompactedFilesCount +
compactedFilesCount);
+ }
+ }
+
+ private static long getDataFileCount(Table table, String partitionPath, long
fileSizeInBytesThreshold,
+ boolean isLess) {
+ CloseableIterable<FileScanTask> fileScanTasks =
+
table.newScan().useSnapshot(table.currentSnapshot().snapshotId()).ignoreResiduals().planFiles();
+ CloseableIterable<FileScanTask> filteredFileScanTasks =
+ CloseableIterable.filter(fileScanTasks, t -> {
+ DataFile file = t.asFileScanTask().file();
+ return (!table.spec().isPartitioned() ||
+ partitionPath == null && file.specId() != table.spec().specId()
||
+ partitionPath != null &&
+
table.specs().get(file.specId()).partitionToPath(file.partition()).equals(partitionPath))
&&
+ (isLess ? file.fileSizeInBytes() < fileSizeInBytesThreshold :
+ file.fileSizeInBytes() >= fileSizeInBytesThreshold);
+ });
+ return Lists.newArrayList(filteredFileScanTasks).size();
+ }
+
+ public static long countDeleteRecords(Table table, String partitionPath) {
+ Table deletesTable =
+ MetadataTableUtils.createMetadataTableInstance(table,
MetadataTableType.POSITION_DELETES);
+ CloseableIterable<ScanTask> deletesScanTasks =
deletesTable.newBatchScan().planFiles();
+ CloseableIterable<ScanTask> filteredDeletesScanTasks =
+ CloseableIterable.filter(deletesScanTasks, t -> {
+ DeleteFile file = ((PositionDeletesScanTask) t).file();
+ return !table.spec().isPartitioned() ||
Review Comment:
Up to you; it's a matter of style. I haven't seen any recommendations on
that topic in either Clean Code or Effective Java.
Only remark it should be easy to read and understand.
````
Even if the operator precedence seems clear to you, it might not be to
others—you shouldn’t assume that other programmers know precedence as well as
you do.
if (a == b && c == d) // AVOID!
if ((a == b) && (c == d)) // RIGHT"
````
to be honest, that seems like a joke
````
x && y || z
x && (y || z)
````
are 2 completely different expressions, if you know boolean algebra
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