mirror of https://gitee.com/bigwinds/arangodb
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2017 ArangoDB GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_AQL_OPTIMIZER_RULES_FEATURE_H
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#define ARANGOD_AQL_OPTIMIZER_RULES_FEATURE_H 1
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#include <map>
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#include "ApplicationFeatures/ApplicationFeature.h"
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#include "Aql/OptimizerRule.h"
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namespace arangodb {
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namespace aql {
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class OptimizerRulesFeature final : public application_features::ApplicationFeature {
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friend class Optimizer;
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public:
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explicit OptimizerRulesFeature(application_features::ApplicationServer& server);
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void prepare() override final;
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void unprepare() override final;
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/// @brief translate a list of rule ids into rule name
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static std::vector<std::string> translateRules(std::vector<int> const&);
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/// @brief translate a single rule
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static char const* translateRule(int rule);
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/// @brief look up the ids of all disabled rules
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static std::unordered_set<int> getDisabledRuleIds(std::vector<std::string> const& names);
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/// @brief register a rule
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static void registerRule(std::string const& name, RuleFunction func,
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OptimizerRule::RuleLevel level,
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std::underlying_type<OptimizerRule::Flags>::type flags);
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private:
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void addRules();
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void addStorageEngineRules();
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static void disableRule(std::string const& name, std::unordered_set<int>& disabled);
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static void enableRule(std::string const& name, std::unordered_set<int>& disabled);
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/// @brief the rules database
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static std::map<int, OptimizerRule> _rules;
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/// @brief map to look up rule id by name
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static std::unordered_map<std::string, std::pair<int, bool>> _ruleLookup;
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};
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} // namespace aql
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} // namespace arangodb
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#endif
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