cpp-ch/local-engine/Functions/SparkFunctionExtractYear.cpp

/*
 * 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.
 */
#include <DataTypes/DataTypeNullable.h>
#include <DataTypes/DataTypesNumber.h>
#include <Functions/FunctionGetDateData.h>

using namespace DB;

namespace local_engine
{
class SparkFunctionExtractYear : public FunctionGetDateData<true, false, DataTypeInt32::FieldType>
{
public:
    static constexpr auto name = "sparkExtractYear";
    static DB::FunctionPtr create(DB::ContextPtr) { return std::make_shared<SparkFunctionExtractYear>(); }

    SparkFunctionExtractYear() = default;
    ~SparkFunctionExtractYear() override = default;

    String getName() const override { return name; }
    bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo &) const override { return true; }
    size_t getNumberOfArguments() const override { return 1; }
    bool useDefaultImplementationForConstants() const override { return true; }

    DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName &) const override { return makeNullable(std::make_shared<DataTypeInt32>()); }
};

REGISTER_FUNCTION(SparkExtractYear)
{
    factory.registerFunction<SparkFunctionExtractYear>();
}
}