deniskuzZ commented on code in PR #6039:
URL: https://github.com/apache/hive/pull/6039#discussion_r2291087213


##########
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/compaction/IcebergTableOptimizer.java:
##########
@@ -85,52 +85,53 @@ public IcebergTableOptimizer(HiveConf conf, TxnStore 
txnHandler, MetadataCache m
    */
   @Override
   public Set<CompactionInfo> findPotentialCompactions(long lastChecked, 
ShowCompactResponse currentCompactions,
-      Set<String> skipDBs, Set<String> skipTables) {
+                                                      Set<String> skipDBs, 
Set<String> skipTables) {
     Set<CompactionInfo> compactionTargets = Sets.newHashSet();
 
-    getTableNames().stream()
-        .filter(table -> !skipDBs.contains(table.getDb()))
-        .filter(table -> !skipTables.contains(table.getNotEmptyDbTable()))
-        .map(table -> {
-          org.apache.hadoop.hive.ql.metadata.Table hiveTable = 
getHiveTable(table.getDb(), table.getTable());
-          org.apache.iceberg.Table icebergTable = 
IcebergTableUtil.getTable(conf, hiveTable.getTTable());
-          return Pair.of(hiveTable, icebergTable);
-        })
-        .filter(t -> hasNewCommits(t.getRight(),
-            snapshotTimeMilCache.get(t.getLeft().getFullyQualifiedName())))
-        .forEach(t -> {
-          String qualifiedTableName = t.getLeft().getFullyQualifiedName();
-          org.apache.hadoop.hive.ql.metadata.Table hiveTable = t.getLeft();
-          org.apache.iceberg.Table icebergTable = t.getRight();
-
-          if (icebergTable.spec().isPartitioned()) {
-            List<org.apache.hadoop.hive.ql.metadata.Partition> partitions = 
findModifiedPartitions(hiveTable,
-                icebergTable, snapshotTimeMilCache.get(qualifiedTableName), 
true);
-
-            partitions.forEach(partition -> 
addCompactionTargetIfEligible(hiveTable.getTTable(), icebergTable,
-                partition.getName(), compactionTargets, currentCompactions, 
skipDBs, skipTables));
-
-            if (IcebergTableUtil.hasUndergonePartitionEvolution(icebergTable) 
&& !findModifiedPartitions(hiveTable,
-                icebergTable, snapshotTimeMilCache.get(qualifiedTableName), 
false).isEmpty()) {
-              addCompactionTargetIfEligible(hiveTable.getTTable(), 
icebergTable,
-                  null, compactionTargets, currentCompactions, skipDBs, 
skipTables);
-            }
-          } else {
-            addCompactionTargetIfEligible(hiveTable.getTTable(), icebergTable, 
null, compactionTargets,
-                currentCompactions, skipDBs, skipTables);
-          }
-
-          snapshotTimeMilCache.put(qualifiedTableName, 
icebergTable.currentSnapshot().timestampMillis());
-        });
+    Iterable<Table> tables = getTables();

Review Comment:
   also you can pass the metadataCache to avoid unnecessary data load



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