chenhao7253886 commented on a change in pull request #531: Add cpu and io 
indicates to audit log
URL: https://github.com/apache/incubator-doris/pull/531#discussion_r248181923
 
 

 ##########
 File path: be/src/runtime/query_statistics.h
 ##########
 @@ -0,0 +1,117 @@
+// 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.
+
+#ifndef DORIS_BE_EXEC_QUERY_STATISTICS_H
+#define DORIS_BE_EXEC_QUERY_STATISTICS_H
+
+#include <mutex>
+
+#include "gen_cpp/data.pb.h"
+#include "util/spinlock.h"
+
+namespace doris {
+
+// This is responsible for collecting query statistics, usually it consists of 
+// two parts, one is current fragment or plan's statistics, the other is sub 
fragment
+// or plan's statistics and QueryStatisticsRecvr is responsible for collecting 
it.
+class QueryStatistics {
+public:
+
+    QueryStatistics() : scan_rows(0), scan_bytes(0) {
+    }
+
+    void add(const QueryStatistics& other) {
+        scan_rows += other.scan_rows;
+        scan_bytes += other.scan_bytes;
+    }
+
+    void add_scan_rows(long scan_rows) {
+        this->scan_rows += scan_rows;
+    }
+
+    void add_scan_bytes(long scan_bytes) {
+        this->scan_bytes += scan_bytes;
+    }
+
+    void clear() {
+        scan_rows = 0;
+        scan_bytes = 0;
+    }
+
+    void serialize(PQueryStatistics* statistics) {
+        DCHECK(statistics != nullptr);
+        statistics->set_scan_rows(scan_rows);
+        statistics->set_scan_bytes(scan_bytes);
+    }
+
+    void deserialize(const PQueryStatistics& statistics) {
+        scan_rows = statistics.scan_rows();
+        scan_bytes = statistics.scan_bytes();
+    }
+
+private:
+
+    long scan_rows;
+    long scan_bytes;
 
 Review comment:
   ok , i will fix it.

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