pzhdfy commented on code in PR #66227: URL: https://github.com/apache/doris/pull/66227#discussion_r4046600124
########## be/src/format_v2/table/paimon_rust_table_reader.h: ########## @@ -0,0 +1,164 @@ +// 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. + +#pragma once + +#include <cstddef> +#include <map> +#include <memory> +#include <optional> +#include <string> +#include <tuple> +#include <unordered_map> +#include <unordered_set> +#include <vector> + +#include "cctz/time_zone.h" +#include "common/status.h" +#include "format_v2/table_reader.h" +#include "runtime/runtime_profile.h" + +namespace arrow { +class RecordBatch; +} + +namespace doris::format::paimon { + +// Reads one FE-planned Paimon DataSplit per split through the paimon-rust C +// bindings (libpaimon_c), using the schema-json pipeline: +// +// paimon_table_from_schema_json(table_path, schema_json, db, table, branch, options) +// -> read_builder (case-insensitive, projection, filter) +// -> paimon_plan_from_split_bytes(base64-decoded FE split) +// -> paimon_read_builder_new_read -> paimon_table_read_to_arrow +// -> per-batch paimon_record_batch_reader_next (Arrow C Data Interface). +// +// Leaf reader inside PaimonHybridReader: a DataSplit is a logical multi-file +// split, not a file range, so this reader does not go through +// FileReader/TableColumnMapper and fills the table-schema output block directly +// (same shape as LanceTableReader). Partition columns that paimon-rust does not +// emit are materialized from the partition values captured by the TableReader +// base class; columns with default expressions are materialized from those +// expressions. +class PaimonRustTableReader final : public format::TableReader { +public: + // Out-of-line (in the .cpp) so TUs that construct or destroy the reader do not + // need the complete PaimonHandles pimpl type. + PaimonRustTableReader(); + ~PaimonRustTableReader() override; + + Status init(format::TableReadOptions&& options) override; + Status prepare_split(const format::SplitReadOptions& options) override; + Status get_block(Block* block, bool* eos) override; + Status abort_split() override; + Status close() override; + // paimon_table_read_to_arrow has no batch-size control and the arrow reader Review Comment: paimon rust current not support set batch size -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
