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#pragma clang diagnostic ignored "-Wreserved-identifier"
#include "ArrowBufferedStreams.h"
#if USE_ARROW || USE_ORC || USE_PARQUET
#include <Common/assert_cast.h>
#include <IO/ReadBufferFromFileDescriptor.h>
#include <IO/WriteBufferFromString.h>
#include <IO/copyData.h>
#include <IO/PeekableReadBuffer.h>
#error #include <arrow/buffer.h>
#error #include <arrow/util/future.h>
#error #include <arrow/io/memory.h>
#error #include <arrow/result.h>
#include <Core/Settings.h>
#include <sys/stat.h>
namespace DB
{
namespace ErrorCodes
{
extern const int INCORRECT_DATA;
}
ArrowBufferedOutputStream::ArrowBufferedOutputStream(WriteBuffer & out_) : out{out_}, is_open{true}
{
}
arrow::Status ArrowBufferedOutputStream::Close()
{
is_open = false;
return arrow::Status::OK();
}
arrow::Result<int64_t> ArrowBufferedOutputStream::Tell() const
{
return arrow::Result<int64_t>(total_length);
}
arrow::Status ArrowBufferedOutputStream::Write(const void * data, int64_t length)
{
out.write(reinterpret_cast<const char *>(data), length);
total_length += length;
return arrow::Status::OK();
}
RandomAccessFileFromSeekableReadBuffer::RandomAccessFileFromSeekableReadBuffer(ReadBuffer & in_, std::optional<off_t> file_size_, bool avoid_buffering_)
: in{in_}, seekable_in{dynamic_cast<SeekableReadBuffer &>(in_)}, file_size{file_size_}, is_open{true}, avoid_buffering(avoid_buffering_)
{
}
arrow::Result<int64_t> RandomAccessFileFromSeekableReadBuffer::GetSize()
{
if (!file_size)
{
if (isBufferWithFileSize(in))
file_size = getFileSizeFromReadBuffer(in);
}
return arrow::Result<int64_t>(*file_size);
}
arrow::Status RandomAccessFileFromSeekableReadBuffer::Close()
{
is_open = false;
return arrow::Status::OK();
}
arrow::Result<int64_t> RandomAccessFileFromSeekableReadBuffer::Tell() const
{
return seekable_in.getPosition();
}
arrow::Result<int64_t> RandomAccessFileFromSeekableReadBuffer::Read(int64_t nbytes, void * out)
{
if (avoid_buffering)
in.setReadUntilPosition(seekable_in.getPosition() + nbytes);
return in.readBig(reinterpret_cast<char *>(out), nbytes);
}
arrow::Result<std::shared_ptr<arrow::Buffer>> RandomAccessFileFromSeekableReadBuffer::Read(int64_t nbytes)
{
ARROW_ASSIGN_OR_RAISE(auto buffer, arrow::AllocateResizableBuffer(nbytes))
ARROW_ASSIGN_OR_RAISE(int64_t bytes_read, Read(nbytes, buffer->mutable_data()))
if (bytes_read < nbytes)
RETURN_NOT_OK(buffer->Resize(bytes_read));
return buffer;
}
arrow::Future<std::shared_ptr<arrow::Buffer>> RandomAccessFileFromSeekableReadBuffer::ReadAsync(const arrow::io::IOContext &, int64_t position, int64_t nbytes)
{
/// Just a stub to to avoid using internal arrow thread pool
return arrow::Future<std::shared_ptr<arrow::Buffer>>::MakeFinished(ReadAt(position, nbytes));
}
arrow::Status RandomAccessFileFromSeekableReadBuffer::Seek(int64_t position)
{
if (avoid_buffering)
{
// Seeking to a position above a previous setReadUntilPosition() confuses some of the
// ReadBuffer implementations.
in.setReadUntilEnd();
}
seekable_in.seek(position, SEEK_SET);
return arrow::Status::OK();
}
ArrowInputStreamFromReadBuffer::ArrowInputStreamFromReadBuffer(ReadBuffer & in_) : in(in_), is_open{true}
{
}
arrow::Result<int64_t> ArrowInputStreamFromReadBuffer::Read(int64_t nbytes, void * out)
{
return in.readBig(reinterpret_cast<char *>(out), nbytes);
}
arrow::Result<std::shared_ptr<arrow::Buffer>> ArrowInputStreamFromReadBuffer::Read(int64_t nbytes)
{
ARROW_ASSIGN_OR_RAISE(auto buffer, arrow::AllocateResizableBuffer(nbytes))
ARROW_ASSIGN_OR_RAISE(int64_t bytes_read, Read(nbytes, buffer->mutable_data()))
if (bytes_read < nbytes)
RETURN_NOT_OK(buffer->Resize(bytes_read));
return buffer;
}
arrow::Status ArrowInputStreamFromReadBuffer::Abort()
{
return arrow::Status();
}
arrow::Result<int64_t> ArrowInputStreamFromReadBuffer::Tell() const
{
return in.count();
}
arrow::Status ArrowInputStreamFromReadBuffer::Close()
{
is_open = false;
return arrow::Status();
}
RandomAccessFileFromRandomAccessReadBuffer::RandomAccessFileFromRandomAccessReadBuffer(SeekableReadBuffer & in_, size_t file_size_) : in(in_), file_size(file_size_) {}
arrow::Result<int64_t> RandomAccessFileFromRandomAccessReadBuffer::GetSize()
{
return file_size;
}
arrow::Result<int64_t> RandomAccessFileFromRandomAccessReadBuffer::ReadAt(int64_t position, int64_t nbytes, void* out)
{
return in.readBigAt(reinterpret_cast<char*>(out), nbytes, position);
}
arrow::Result<std::shared_ptr<arrow::Buffer>> RandomAccessFileFromRandomAccessReadBuffer::ReadAt(int64_t position, int64_t nbytes)
{
ARROW_ASSIGN_OR_RAISE(auto buffer, arrow::AllocateResizableBuffer(nbytes))
ARROW_ASSIGN_OR_RAISE(int64_t bytes_read, ReadAt(position, nbytes, buffer->mutable_data()))
if (bytes_read < nbytes)
RETURN_NOT_OK(buffer->Resize(bytes_read));
return buffer;
}
arrow::Future<std::shared_ptr<arrow::Buffer>> RandomAccessFileFromRandomAccessReadBuffer::ReadAsync(const arrow::io::IOContext&, int64_t position, int64_t nbytes)
{
return arrow::Future<std::shared_ptr<arrow::Buffer>>::MakeFinished(ReadAt(position, nbytes));
}
arrow::Status RandomAccessFileFromRandomAccessReadBuffer::Close()
{
chassert(is_open);
is_open = false;
return arrow::Status::OK();
}
arrow::Status RandomAccessFileFromRandomAccessReadBuffer::Seek(int64_t) { return arrow::Status::NotImplemented(""); }
arrow::Result<int64_t> RandomAccessFileFromRandomAccessReadBuffer::Tell() const { return arrow::Status::NotImplemented(""); }
arrow::Result<int64_t> RandomAccessFileFromRandomAccessReadBuffer::Read(int64_t, void*) { return arrow::Status::NotImplemented(""); }
arrow::Result<std::shared_ptr<arrow::Buffer>> RandomAccessFileFromRandomAccessReadBuffer::Read(int64_t) { return arrow::Status::NotImplemented(""); }
std::shared_ptr<arrow::io::RandomAccessFile> asArrowFile(
ReadBuffer & in,
const FormatSettings & settings,
std::atomic<int> & is_cancelled,
const std::string & format_name,
const std::string & magic_bytes,
bool avoid_buffering)
{
bool has_file_size = isBufferWithFileSize(in);
auto * seekable_in = dynamic_cast<SeekableReadBuffer *>(&in);
if (has_file_size && seekable_in && settings.seekable_read)
{
if (avoid_buffering && seekable_in->supportsReadAt())
return std::make_shared<RandomAccessFileFromRandomAccessReadBuffer>(*seekable_in, getFileSizeFromReadBuffer(in));
if (seekable_in->checkIfActuallySeekable())
return std::make_shared<RandomAccessFileFromSeekableReadBuffer>(*seekable_in, std::nullopt, avoid_buffering);
}
// fallback to loading the entire file in memory
return asArrowFileLoadIntoMemory(in, is_cancelled, format_name, magic_bytes);
}
std::shared_ptr<arrow::io::RandomAccessFile> asArrowFileLoadIntoMemory(
ReadBuffer & in,
std::atomic<int> & is_cancelled,
const std::string & format_name,
const std::string & magic_bytes)
{
std::string file_data(magic_bytes.size(), '\0');
/// Avoid loading the whole file if it doesn't seem to even be in the correct format.
size_t bytes_read = in.read(file_data.data(), magic_bytes.size());
if (bytes_read < magic_bytes.size() || file_data != magic_bytes)
throw Exception(ErrorCodes::INCORRECT_DATA, "Not a {} file", format_name);
WriteBufferFromString file_buffer(file_data, AppendModeTag{});
copyData(in, file_buffer, is_cancelled);
file_buffer.finalize();
return std::make_shared<arrow::io::BufferReader>(arrow::Buffer::FromString(std::move(file_data)));
}
}
#endif
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