// 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.

// This file is copied from

// https://github.com/apache/impala/blob/branch-2.9.0/be/src/exec/scan-node.cpp

// and modified by Doris

#include "exec/scan_node.h"

#include <gen_cpp/Metrics_types.h>

#include <memory>

#include "vec/exprs/vexpr_context.h"

#include "vec/utils/util.hpp"

namespace doris {

class RuntimeState;

namespace vectorized {

class VExpr;

} // namespace vectorized

const std::string ScanNode::_s_bytes_read_counter = "BytesRead";

const std::string ScanNode::_s_rows_read_counter = "RowsRead";

const std::string ScanNode::_s_total_throughput_counter = "TotalReadThroughput";

const std::string ScanNode::_s_num_disks_accessed_counter = "NumDiskAccess";

Status ScanNode::prepare(RuntimeState* state) {

    RETURN_IF_ERROR(ExecNode::prepare(state));

    _bytes_read_counter = ADD_COUNTER(runtime_profile(), _s_bytes_read_counter, TUnit::BYTES);

    //TODO: The _rows_read_counter == RowsReturned counter in exec node, there is no need to keep both of them

    _rows_read_counter = ADD_COUNTER(runtime_profile(), _s_rows_read_counter, TUnit::UNIT);

#ifndef BE_TEST

    _total_throughput_counter =

            runtime_profile()->add_rate_counter(_s_total_throughput_counter, _bytes_read_counter);

#endif

    _num_disks_accessed_counter =

            ADD_COUNTER(runtime_profile(), _s_num_disks_accessed_counter, TUnit::UNIT);

    return Status::OK();

}

} // namespace doris