mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 10:22:10 +00:00
104 lines
2.8 KiB
C++
104 lines
2.8 KiB
C++
#include "ParquetBlockOutputFormat.h"
|
|
|
|
#if USE_PARQUET
|
|
|
|
#include <Formats/FormatFactory.h>
|
|
#include <parquet/arrow/writer.h>
|
|
#include "ArrowBufferedStreams.h"
|
|
#include "CHColumnToArrowColumn.h"
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int UNKNOWN_EXCEPTION;
|
|
}
|
|
|
|
ParquetBlockOutputFormat::ParquetBlockOutputFormat(WriteBuffer & out_, const Block & header_, const FormatSettings & format_settings_)
|
|
: IOutputFormat(header_, out_), format_settings{format_settings_}
|
|
{
|
|
}
|
|
|
|
void ParquetBlockOutputFormat::consume(Chunk chunk)
|
|
{
|
|
const size_t columns_num = chunk.getNumColumns();
|
|
std::shared_ptr<arrow::Table> arrow_table;
|
|
|
|
if (!ch_column_to_arrow_column)
|
|
{
|
|
const Block & header = getPort(PortKind::Main).getHeader();
|
|
ch_column_to_arrow_column = std::make_unique<CHColumnToArrowColumn>(header, "Parquet", false, format_settings.parquet.output_string_as_string);
|
|
}
|
|
|
|
ch_column_to_arrow_column->chChunkToArrowTable(arrow_table, chunk, columns_num);
|
|
|
|
if (!file_writer)
|
|
{
|
|
auto sink = std::make_shared<ArrowBufferedOutputStream>(out);
|
|
|
|
parquet::WriterProperties::Builder builder;
|
|
#if USE_SNAPPY
|
|
builder.compression(parquet::Compression::SNAPPY);
|
|
#endif
|
|
auto props = builder.build();
|
|
auto status = parquet::arrow::FileWriter::Open(
|
|
*arrow_table->schema(),
|
|
arrow::default_memory_pool(),
|
|
sink,
|
|
props, /*parquet::default_writer_properties(),*/
|
|
&file_writer);
|
|
if (!status.ok())
|
|
throw Exception{"Error while opening a table: " + status.ToString(), ErrorCodes::UNKNOWN_EXCEPTION};
|
|
}
|
|
|
|
// TODO: calculate row_group_size depending on a number of rows and table size
|
|
auto status = file_writer->WriteTable(*arrow_table, format_settings.parquet.row_group_size);
|
|
|
|
if (!status.ok())
|
|
throw Exception{"Error while writing a table: " + status.ToString(), ErrorCodes::UNKNOWN_EXCEPTION};
|
|
}
|
|
|
|
void ParquetBlockOutputFormat::finalizeImpl()
|
|
{
|
|
if (!file_writer)
|
|
{
|
|
const Block & header = getPort(PortKind::Main).getHeader();
|
|
|
|
consume(Chunk(header.getColumns(), 0));
|
|
}
|
|
|
|
auto status = file_writer->Close();
|
|
if (!status.ok())
|
|
throw Exception{"Error while closing a table: " + status.ToString(), ErrorCodes::UNKNOWN_EXCEPTION};
|
|
}
|
|
|
|
void registerOutputFormatParquet(FormatFactory & factory)
|
|
{
|
|
factory.registerOutputFormat(
|
|
"Parquet",
|
|
[](WriteBuffer & buf,
|
|
const Block & sample,
|
|
const RowOutputFormatParams &,
|
|
const FormatSettings & format_settings)
|
|
{
|
|
return std::make_shared<ParquetBlockOutputFormat>(buf, sample, format_settings);
|
|
});
|
|
factory.markFormatHasNoAppendSupport("Parquet");
|
|
}
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
namespace DB
|
|
{
|
|
class FormatFactory;
|
|
void registerOutputFormatParquet(FormatFactory &)
|
|
{
|
|
}
|
|
}
|
|
|
|
#endif
|