HappenLee commented on code in PR #65837:
URL: https://github.com/apache/doris/pull/65837#discussion_r3777937168


##########
fe/fe-core/src/main/java/org/apache/doris/nereids/glue/translator/RuntimeFilterBucketPruneClassifier.java:
##########
@@ -0,0 +1,121 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package org.apache.doris.nereids.glue.translator;
+
+import org.apache.doris.analysis.Expr;
+import org.apache.doris.analysis.SlotRef;
+import org.apache.doris.catalog.Column;
+import org.apache.doris.catalog.DistributionInfo;
+import org.apache.doris.catalog.HashDistributionInfo;
+import org.apache.doris.catalog.OlapTable;
+import org.apache.doris.catalog.Partition;
+import org.apache.doris.planner.OlapScanNode;
+import org.apache.doris.planner.PlanNode;
+import org.apache.doris.thrift.TRuntimeFilterType;
+
+/** Classifies direct single-column HASH targets for BE-side runtime-filter 
bucket pruning. */
+final class RuntimeFilterBucketPruneClassifier {
+    private RuntimeFilterBucketPruneClassifier() {
+    }
+
+    static Classification classify(TRuntimeFilterType filterType, Expr 
targetExpr, PlanNode scanNode) {
+        if (filterType != TRuntimeFilterType.IN && filterType != 
TRuntimeFilterType.IN_OR_BLOOM) {
+            return Classification.unsupported("runtime filter is not IN or 
IN_OR_BLOOM");
+        }
+        if (!(scanNode instanceof OlapScanNode)) {
+            return Classification.unsupported("target scan is not an 
OlapScanNode");
+        }
+        if (!(targetExpr instanceof SlotRef)) {
+            return Classification.unsupported("target expression is not a 
direct SlotRef");
+        }
+
+        Column targetColumn = ((SlotRef) targetExpr).getColumn();
+        if (targetColumn == null) {
+            return Classification.unsupported("target SlotRef has no column");
+        }
+
+        OlapScanNode olapScanNode = (OlapScanNode) scanNode;
+        if (olapScanNode.isPointQuery()) {
+            return Classification.unsupported("target scan is a point query");
+        }
+        OlapTable table = olapScanNode.getOlapTable();
+        if (table == null || olapScanNode.getSelectedPartitionIds().isEmpty()) 
{
+            return Classification.unsupported("target scan has no selected 
partitions");
+        }
+
+        Column distributionColumn = null;
+        for (Long partitionId : olapScanNode.getSelectedPartitionIds()) {
+            Partition partition = table.getPartition(partitionId);
+            if (partition == null) {
+                return Classification.unsupported("selected partition does not 
exist");
+            }
+            DistributionInfo distributionInfo = 
partition.getDistributionInfo();
+            if (!(distributionInfo instanceof HashDistributionInfo)) {
+                return Classification.unsupported("distribution type is not 
HASH");
+            }
+            HashDistributionInfo hashDistributionInfo = (HashDistributionInfo) 
distributionInfo;
+            if (hashDistributionInfo.getDistributionColumns().size() != 1) {
+                return Classification.unsupported("HASH distribution is not 
single-column");
+            }
+            Column currentDistributionColumn = 
hashDistributionInfo.getDistributionColumns().get(0);
+            if (!sameColumn(targetColumn, currentDistributionColumn)) {
+                return Classification.unsupported("target SlotRef is not the 
HASH distribution column");
+            }
+            if (distributionColumn != null && !sameColumn(distributionColumn, 
currentDistributionColumn)) {
+                return Classification.unsupported("selected partitions use 
different distribution columns");
+            }
+            distributionColumn = currentDistributionColumn;
+        }
+        return Classification.supported();
+    }
+
+    private static boolean sameColumn(Column targetColumn, Column 
distributionColumn) {
+        if (targetColumn == distributionColumn) {
+            return true;
+        }
+        return targetColumn.tryGetBaseColumnName()

Review Comment:
   Fixed in 6b7a97a4f24. The classifier now resolves MV columns only through a 
direct `SlotRef` to a non-MV base column; complex and nested MV definitions are 
rejected before name/type comparison. Added a historical alias/type collision 
case where `mv.dist_col := abs(base.dist_col)` and verified bucket pruning is 
disabled.



##########
be/src/exec/scan/parallel_scanner_builder.h:
##########
@@ -54,7 +55,17 @@ class ParallelScannerBuilder {
               _is_preaggregation(is_preaggregation),
               _tablets(tablets.cbegin(), tablets.cend()),
               _key_ranges(key_ranges.cbegin(), key_ranges.cend()),
-              _read_sources(read_sources) {}
+              _read_sources(read_sources) {
+        DORIS_CHECK_EQ(_tablets.size(), scan_ranges.size());
+        for (size_t i = 0; i < _tablets.size(); ++i) {

Review Comment:
   Fixed in 6b7a97a4f24. Removed the per-tablet `unordered_map`; 
`ParallelScannerBuilder` now reuses the already-owned, index-aligned 
`TPaloScanRange` vector and forwards each range directly to every split 
scanner. This adds no identity allocation for ineligible or old-FE ranges. 
Added 20,000-range ineligible coverage and retained the split-scanner bucket 
identity test.



##########
be/src/exec/scan/scanner_scheduler.cpp:
##########
@@ -176,14 +176,21 @@ void 
ScannerScheduler::_scanner_scan(std::shared_ptr<ScannerContext> ctx,
 
     Status status = Status::OK();
     bool eos = false;
+    auto append_late_arrival_runtime_filter = [&] {
+        Status rf_status = scanner->try_append_late_arrival_runtime_filter();
+        if (!rf_status.ok()) {
+            LOG(WARNING) << "Failed to append late arrival runtime filter: "
+                         << rf_status.to_string();
+        }
+    };
 
     ASSIGN_STATUS_IF_CATCH_EXCEPTION(
             RuntimeState* state = ctx->state(); DCHECK(nullptr != state);
             // scanner->open may alloc plenty amount of memory(read blocks of 
data),
             // so better to also check low memory and clear free blocks here.
             if (ctx->low_memory_mode()) { ctx->clear_free_blocks(); }
 
-            if (scanner->check_partition_pruned()) { eos = true; }
+            if (scanner->is_pruned_by_runtime_filter()) { eos = true; }

Review Comment:
   Fixed in 6b7a97a4f24. The cleanup hook is now `release_unopened_resources()` 
and is valid both before and after `prepare()`. The scheduler invokes it on the 
initial pre-prepare pruning path and on the post-prepare/pre-open path. 
`OlapScanner` clears the complete `ReaderParams` (including tablet, rowset 
splits, and delete metadata) plus prepared-only resources. Added 
bounded-concurrency coverage proving a pending scanner is pruned before its 
first `prepare()`, and lifecycle coverage proving constructor-owned inputs are 
released.



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