Implement MySQL Function TO_BASE64() and FROM_BASE64()

src/sql/engine/expr/ob_expr_benchmark.cpp

@@ -1,13 +1,14 @@
-// (C) Copyright 2013-2016 Alibaba Inc. All Rights Reserved.
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License
-// version 2 as published by the Free Software Foundation.
-// Version: $Id$
-//  Authors:
-//    peihan.dph@alibaba-inc.com
-//  Normalizer:
-//    peihan.dph@alibaba-inc.com
-// This file is for implementation of func expr_benchmark
+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
 
 #define USING_LOG_PREFIX SQL_ENG
 
@@ -113,4 +114,4 @@ void ObExprBenchmark::clear_all_flags(common::ObIArray<ObExpr *> &exprs, ObEvalC
 }
 
 }  // end namespace sql
-}  // end namespace oceanbase
+}  // end namespace oceanbase