// 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.

#pragma once

#include "common/status.h"

#include "core/block/block.h"

#include "exprs/vexpr.h"

#include "exprs/vexpr_context.h"

#include "runtime/runtime_state.h"

namespace doris {

class VExpr;

class LambdaFunction {

public:

    virtual ~LambdaFunction() = default;

    virtual std::string get_name() const = 0;

    virtual doris::Status prepare(RuntimeState* state) {

        batch_size = state->batch_size();

        return Status::OK();

    }

    virtual doris::Status execute(VExprContext* context, const doris::Block* block,

                                  Selector* selector, size_t count, ColumnPtr& result_column,

                                  const DataTypePtr& result_type,

                                  const VExprSPtrs& children) const = 0;

    int batch_size;

};

using LambdaFunctionPtr = std::shared_ptr<LambdaFunction>;

} // namespace doris