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#pragma once
#include "clickhouse_config.h"
#if USE_ARROW
#include <Processors/Formats/IInputFormat.h>
#include <Processors/Formats/ISchemaReader.h>
#include <Formats/FormatSettings.h>
namespace arrow { class RecordBatchReader; }
namespace arrow::ipc { class RecordBatchFileReader; }
namespace DB
{
class ReadBuffer;
class ArrowColumnToCHColumn;
class ArrowBlockInputFormat : public IInputFormat
{
public:
ArrowBlockInputFormat(ReadBuffer & in_, const Block & header_, bool stream_, const FormatSettings & format_settings_);
void resetParser() override;
String getName() const override { return "ArrowBlockInputFormat"; }
const BlockMissingValues & getMissingValues() const override;
size_t getApproxBytesReadForChunk() const override { return approx_bytes_read_for_chunk; }
private:
Chunk generate() override;
void onCancel() override
{
is_stopped = 1;
}
// Whether to use ArrowStream format
bool stream;
// This field is only used for ArrowStream format
std::shared_ptr<arrow::RecordBatchReader> stream_reader;
// The following fields are used only for Arrow format
std::shared_ptr<arrow::ipc::RecordBatchFileReader> file_reader;
std::unique_ptr<ArrowColumnToCHColumn> arrow_column_to_ch_column;
int record_batch_total = 0;
int record_batch_current = 0;
BlockMissingValues block_missing_values;
size_t approx_bytes_read_for_chunk = 0;
const FormatSettings format_settings;
void prepareReader();
std::atomic<int> is_stopped{0};
};
class ArrowSchemaReader : public ISchemaReader
{
public:
ArrowSchemaReader(ReadBuffer & in_, bool stream_, const FormatSettings & format_settings_);
NamesAndTypesList readSchema() override;
std::optional<size_t> readNumberOrRows() override;
private:
void initializeIfNeeded();
bool stream;
const FormatSettings format_settings;
std::shared_ptr<arrow::RecordBatchReader> stream_reader;
std::shared_ptr<arrow::ipc::RecordBatchFileReader> file_reader;
};
}
#endif
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