be/src/pipeline/exec/empty_set_operator.h

// 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 <stdint.h>

#include "operator.h"

namespace doris::pipeline {
#include "common/compile_check_begin.h"

class EmptySetLocalState final : public PipelineXLocalState<FakeSharedState> {
public:
    ENABLE_FACTORY_CREATOR(EmptySetLocalState);

    EmptySetLocalState(RuntimeState* state, OperatorXBase* parent)
            : PipelineXLocalState<FakeSharedState>(state, parent) {}
    ~EmptySetLocalState() = default;
};

class EmptySetSourceOperatorX final : public OperatorX<EmptySetLocalState> {
public:
    EmptySetSourceOperatorX(ObjectPool* pool, const TPlanNode& tnode, int operator_id,
                            const DescriptorTbl& descs)
            : OperatorX<EmptySetLocalState>(pool, tnode, operator_id, descs) {}

#ifdef BE_TEST
    EmptySetSourceOperatorX() = default;
#endif

    Status get_block(RuntimeState* state, vectorized::Block* block, bool* eos) override;

    [[nodiscard]] bool is_source() const override { return true; }
};

#include "common/compile_check_end.h"
} // namespace doris::pipeline