be/src/exec/common/data_gen_functions/vnumbers_tvf.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 "exec/common/data_gen_functions/vnumbers_tvf.h"

#include <gen_cpp/PaloInternalService_types.h>
#include <gen_cpp/PlanNodes_types.h>
#include <glog/logging.h>

#include <algorithm>
#include <utility>

#include "common/status.h"
#include "core/assert_cast.h"
#include "core/block/block.h"
#include "core/block/column_with_type_and_name.h"
#include "core/column/column.h"
#include "core/data_type/data_type.h"
#include "core/types.h"
#include "runtime/descriptors.h"
#include "runtime/runtime_state.h"

namespace doris {

VNumbersTVF::VNumbersTVF(TupleId tuple_id, const TupleDescriptor* tuple_desc)
        : VDataGenFunctionInf(tuple_id, tuple_desc) {}

Status VNumbersTVF::get_next(RuntimeState* state, Block* block, bool* eos) {
    DCHECK(block->rows() == 0);
    RETURN_IF_CANCELLED(state);
    bool mem_reuse = block->mem_reuse();
    int batch_size = state->batch_size();
    std::vector<MutableColumnPtr> columns(_slot_num);

    // now only support one column for tvf numbers
    for (int i = 0; i < _slot_num; ++i) {
        if (mem_reuse) {
            columns[i] = std::move(*(block->get_by_position(i).column)).mutate();
        } else {
            columns[i] = _tuple_desc->slots()[i]->get_empty_mutable_column();
        }

        if (_total_numbers <= 0) [[unlikely]] {
            *eos = true;
            continue;
        }
        auto* column_res = assert_cast<ColumnInt64*>(columns[i].get()); //BIGINT
        int64_t end_value = std::min((int64_t)(_next_number + batch_size), _total_numbers);
        if (_use_const) {
            column_res->insert_many_vals(_const_value, end_value - _next_number);
        } else {
            column_res->insert_range_of_integer(_next_number, end_value);
        }
        if (end_value == _total_numbers) {
            *eos = true;
        } else {
            _next_number = end_value;
        }
    }

    if (mem_reuse) {
        columns.clear();
    } else {
        size_t n_columns = 0;
        for (const auto* slot_desc : _tuple_desc->slots()) {
            block->insert(ColumnWithTypeAndName(std::move(columns[n_columns++]),
                                                slot_desc->get_data_type_ptr(),
                                                slot_desc->col_name()));
        }
    }
    return Status::OK();
}

Status VNumbersTVF::set_scan_ranges(const std::vector<TScanRangeParams>& scan_range_params) {
    // Currently we do not support multi-threads numbers function, so there is no need to
    // use more than one scan_range_param.
    DCHECK(scan_range_params.size() == 1);
    _use_const = scan_range_params[0].scan_range.data_gen_scan_range.numbers_params.useConst;
    _const_value = scan_range_params[0].scan_range.data_gen_scan_range.numbers_params.constValue;
    _total_numbers =
            scan_range_params[0].scan_range.data_gen_scan_range.numbers_params.totalNumbers;
    return Status::OK();
}

} // namespace doris