yinzhijian commented on code in PR #9433: URL: https://github.com/apache/incubator-doris/pull/9433#discussion_r868946549
########## be/src/vec/exec/vparquet_scanner.cpp: ########## @@ -0,0 +1,311 @@ +// 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 "vec/exec/vparquet_scanner.h" +#include "exec/parquet_reader.h" +#include "exprs/expr.h" +#include "runtime/descriptors.h" +#include "runtime/exec_env.h" +#include "vec/data_types/data_type_factory.hpp" +#include "vec/functions/simple_function_factory.h" +#include "vec/utils/arrow_column_to_doris_column.h" + +namespace doris::vectorized { + +VParquetScanner::VParquetScanner(RuntimeState* state, RuntimeProfile* profile, + const TBrokerScanRangeParams& params, + const std::vector<TBrokerRangeDesc>& ranges, + const std::vector<TNetworkAddress>& broker_addresses, + const std::vector<TExpr>& pre_filter_texprs, + ScannerCounter* counter) + : ParquetScanner(state, profile, params, ranges, broker_addresses, pre_filter_texprs, + counter), + _batch(nullptr), + _arrow_batch_cur_idx(0), + _num_of_columns_from_file(0) {} +VParquetScanner::~VParquetScanner() {} + +Status VParquetScanner::open() { + RETURN_IF_ERROR(ParquetScanner::open()); + if (_ranges.empty()) { + return Status::OK(); + } + auto range = _ranges[0]; + _num_of_columns_from_file = range.__isset.num_of_columns_from_file + ? implicit_cast<int>(range.num_of_columns_from_file) + : implicit_cast<int>(_src_slot_descs.size()); + + // check consistency + if (range.__isset.num_of_columns_from_file) { + int size = range.columns_from_path.size(); + for (const auto& r : _ranges) { + if (r.columns_from_path.size() != size) { + return Status::InternalError("ranges have different number of columns."); + } + } + } + return Status::OK(); +} + +// get next available arrow batch +Status VParquetScanner::_next_arrow_batch() { + _arrow_batch_cur_idx = 0; + // first, init file reader + if (_cur_file_reader == nullptr || _cur_file_eof) { + RETURN_IF_ERROR(open_next_reader()); + _cur_file_eof = false; + } + // second, loop until find available arrow batch or EOF + while (!_scanner_eof) { + RETURN_IF_ERROR(_cur_file_reader->next_batch(&_batch, _src_slot_descs, &_cur_file_eof)); + if (_cur_file_eof) { + RETURN_IF_ERROR(open_next_reader()); + _cur_file_eof = false; + continue; + } + if (_batch->num_rows() == 0) { + continue; + } + return Status::OK(); + } + return Status::EndOfFile("EOF"); +} + +Status VParquetScanner::_init_arrow_batch_if_necessary() { + // 1. init batch if first time + // 2. reset reader if end of file + Status status; + if (_scanner_eof || _batch == nullptr || _arrow_batch_cur_idx >= _batch->num_rows()) { + while (!_scanner_eof) { + status = _next_arrow_batch(); + if (_scanner_eof) { + return status; + } + if (status.is_end_of_file()) { + // try next file + continue; + } + return status; + } + } + return status; +} + +Status VParquetScanner::_init_src_block(Block* block) { + size_t batch_pos = 0; + for (auto i = 0; i < _num_of_columns_from_file; ++i) { + SlotDescriptor* slot_desc = _src_slot_descs[i]; + if (slot_desc == nullptr) { + continue; + } + auto* array = _batch->column(batch_pos++).get(); + // let src column be nullable for simplify converting + auto is_nullable = true; Review Comment: We don't support non-nullable now, but will support it in the future. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For additional commands, e-mail: commits-h...@doris.apache.org
