ResultSetSortImpl.h

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/*
 * Copyright 2022 HEAVY.AI, Inc.
 *
 * Licensed 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.
 */

#ifndef QUERYENGINE_RESULTSETSORTIMPL_H
#define QUERYENGINE_RESULTSETSORTIMPL_H

#include "../Shared/TargetInfo.h"
#include "CompilationOptions.h"

struct PodOrderEntry {
  int tle_no;       /* targetlist entry number: 1-based */
  bool is_desc;     /* true if order is DESC */
  bool nulls_first; /* true if nulls are ordered first.  otherwise last. */
};

struct GroupByBufferLayoutInfo {
  const size_t entry_count;
  const size_t col_off;
  const size_t col_bytes;
  const size_t row_bytes;
  const TargetInfo oe_target_info;
  const int64_t target_groupby_index;
};

namespace Data_Namespace {

class DataMgr;

}  // namespace Data_Namespace

template <class K>
std::vector<uint32_t> baseline_sort(const ExecutorDeviceType device_type,
                                    const int device_id,
                                    Data_Namespace::DataMgr* data_mgr,
                                    const int8_t* groupby_buffer,
                                    const PodOrderEntry& oe,
                                    const GroupByBufferLayoutInfo& layout,
                                    const size_t top_n,
                                    const size_t start,
                                    const size_t step);

#endif  // QUERYENGINE_RESULTSETSORTIMPL_H