b1b2697cc7
1. Fix iceberg catalog access s3 2. Fix iceberg catalog partition table query 3. Fix persistence
70 lines
2.8 KiB
C++
70 lines
2.8 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#pragma once
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#include "common/status.h"
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#include "runtime/types.h"
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#include "vec/exprs/vexpr_context.h"
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namespace doris::vectorized {
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class Block;
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// This a reader interface for all file readers.
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// A GenericReader is responsible for reading a file and return
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// a set of blocks with specified schema,
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class GenericReader {
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public:
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virtual Status get_next_block(Block* block, size_t* read_rows, bool* eof) = 0;
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virtual std::unordered_map<std::string, TypeDescriptor> get_name_to_type() {
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std::unordered_map<std::string, TypeDescriptor> map;
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return map;
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}
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virtual Status get_columns(std::unordered_map<std::string, TypeDescriptor>* name_to_type,
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std::unordered_set<std::string>* missing_cols) {
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return Status::NotSupported("get_columns is not implemented");
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}
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virtual Status get_parsed_schema(std::vector<std::string>* col_names,
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std::vector<TypeDescriptor>* col_types) {
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return Status::NotSupported("get_parsed_schema is not implemented for this reader.");
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}
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virtual ~GenericReader() = default;
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/// If the underlying FileReader has filled the partition&missing columns,
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/// The FileScanner does not need to fill
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virtual bool fill_all_columns() const { return _fill_all_columns; }
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/// Tell the underlying FileReader the partition&missing columns,
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/// and the FileReader determine to fill columns or not.
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/// Should set _fill_all_columns = true, if fill the columns.
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virtual Status set_fill_columns(
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const std::unordered_map<std::string, std::tuple<std::string, const SlotDescriptor*>>&
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partition_columns,
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const std::unordered_map<std::string, VExprContext*>& missing_columns) {
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return Status::OK();
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}
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protected:
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const size_t _MIN_BATCH_SIZE = 4064; // 4094 - 32(padding)
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/// Whether the underlying FileReader has filled the partition&missing columns
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bool _fill_all_columns = false;
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};
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} // namespace doris::vectorized
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