TableFunctionExecutionContext.h

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/*
 * Copyright 2019 OmniSci, 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.
 */

#pragma once

#include "QueryEngine/CompilationOptions.h"
#include "QueryEngine/Descriptors/RowSetMemoryOwner.h"
#include "QueryEngine/RelAlgExecutionUnit.h"

struct InputTableInfo;
class TableFunctionCompilationContext;
class ColumnFetcher;
class Executor;

class TableFunctionExecutionContext {
 public:
  TableFunctionExecutionContext(std::shared_ptr<RowSetMemoryOwner> row_set_mem_owner)
      : row_set_mem_owner_(row_set_mem_owner) {}

  // non-copyable
  TableFunctionExecutionContext(const TableFunctionExecutionContext&) = delete;
  TableFunctionExecutionContext& operator=(const TableFunctionExecutionContext&) = delete;

  ResultSetPtr execute(const TableFunctionExecutionUnit& exe_unit,
                       const InputTableInfo& table_info,
                       const TableFunctionCompilationContext* compilation_context,
                       const ColumnFetcher& column_fetcher,
                       const ExecutorDeviceType device_type,
                       Executor* executor);

 private:
  ResultSetPtr launchCpuCode(const TableFunctionExecutionUnit& exe_unit,
                             const TableFunctionCompilationContext* compilation_context,
                             std::vector<const int8_t*>& col_buf_ptrs,
                             const size_t elem_count,
                             Executor* executor);
  ResultSetPtr launchGpuCode(const TableFunctionExecutionUnit& exe_unit,
                             const TableFunctionCompilationContext* compilation_context,
                             std::vector<const int8_t*>& col_buf_ptrs,
                             const size_t elem_count,
                             const int device_id,
                             Executor* executor);

  std::shared_ptr<RowSetMemoryOwner> row_set_mem_owner_;
};