equality_delete_writer.h

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/*
 * 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 <cstdint>
#include <memory>
#include <optional>
#include <span>
#include <string>
#include <unordered_map>
 
#include "iceberg/arrow_c_data.h"
#include "iceberg/data/writer.h"
#include "iceberg/file_format.h"
#include "iceberg/iceberg_data_export.h"
#include "iceberg/result.h"
#include "iceberg/row/partition_values.h"
#include "iceberg/type_fwd.h"
 
namespace iceberg {
 
struct ICEBERG_DATA_EXPORT EqualityDeleteWriterOptions {
  std::string path;
  std::shared_ptr<Schema> schema;
  std::shared_ptr<PartitionSpec> spec;
  PartitionValues partition;
  FileFormatType format = FileFormatType::kParquet;
  std::shared_ptr<FileIO> io;
  std::vector<int32_t> equality_field_ids;
  std::optional<int32_t> sort_order_id;
  std::unordered_map<std::string, std::string> properties;
  // TODO(anyone): add key_metadata for encryption
};
 
class ICEBERG_DATA_EXPORT EqualityDeleteWriter : public FileWriter {
 public:
  ~EqualityDeleteWriter() override;
 
  static Result<std::unique_ptr<EqualityDeleteWriter>> Make(
      const EqualityDeleteWriterOptions& options);
 
  Status Write(ArrowArray* data) override;
  Result<int64_t> Length() const override;
  Status Close() override;
  Result<WriteResult> Metadata() override;
 
  std::span<const int32_t> equality_field_ids() const;
 
 private:
  class Impl;
  std::unique_ptr<Impl> impl_;
 
  explicit EqualityDeleteWriter(std::unique_ptr<Impl> impl);
};
 
}  // namespace iceberg