Github user zuyu commented on a diff in the pull request: https://github.com/apache/incubator-quickstep/pull/300#discussion_r140575177 --- Diff: query_optimizer/rules/FuseHashSelect.hpp --- @@ -0,0 +1,67 @@ +/** + * 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 QUICKSTEP_QUERY_OPTIMIZER_RULES_FUSE_HASH_SELECT_HPP_ +#define QUICKSTEP_QUERY_OPTIMIZER_RULES_FUSE_HASH_SELECT_HPP_ + +#include <cstdint> +#include <memory> +#include <string> + + --- End diff -- Remove this duplicated empty line, and unused headers, if any.
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