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#include "ORCBlockInputFormat.h"
#if USE_ORC
# include <DataTypes/NestedUtils.h>
# include <Formats/FormatFactory.h>
# include <Formats/SchemaInferenceUtils.h>
# include <IO/ReadBufferFromMemory.h>
# include <IO/WriteHelpers.h>
# include <IO/copyData.h>
# include <boost/algorithm/string/case_conv.hpp>
# include "ArrowBufferedStreams.h"
# include "ArrowColumnToCHColumn.h"
# error #include "ArrowFieldIndexUtil.h"
# include "NativeORCBlockInputFormat.h"
namespace DB
{
namespace ErrorCodes
{
extern const int BAD_ARGUMENTS;
extern const int CANNOT_READ_ALL_DATA;
}
ORCBlockInputFormat::ORCBlockInputFormat(ReadBuffer & in_, Block header_, const FormatSettings & format_settings_)
: IInputFormat(std::move(header_), &in_), format_settings(format_settings_), skip_stripes(format_settings.orc.skip_stripes)
{
}
Chunk ORCBlockInputFormat::generate()
{
block_missing_values.clear();
if (!file_reader)
prepareReader();
if (is_stopped)
return {};
for (; stripe_current < stripe_total && skip_stripes.contains(stripe_current); ++stripe_current)
;
if (stripe_current >= stripe_total)
return {};
if (need_only_count)
return getChunkForCount(file_reader->GetRawORCReader()->getStripe(stripe_current++)->getNumberOfRows());
auto batch_result = file_reader->ReadStripe(stripe_current, include_indices);
if (!batch_result.ok())
throw ParsingException(ErrorCodes::CANNOT_READ_ALL_DATA, "Failed to create batch reader: {}", batch_result.status().ToString());
auto batch = batch_result.ValueOrDie();
if (!batch)
return {};
auto table_result = arrow::Table::FromRecordBatches({batch});
if (!table_result.ok())
throw ParsingException(
ErrorCodes::CANNOT_READ_ALL_DATA, "Error while reading batch of ORC data: {}", table_result.status().ToString());
/// We should extract the number of rows directly from the stripe, because in case when
/// record batch contains 0 columns (for example if we requested only columns that
/// are not presented in data) the number of rows in record batch will be 0.
size_t num_rows = file_reader->GetRawORCReader()->getStripe(stripe_current)->getNumberOfRows();
auto table = table_result.ValueOrDie();
if (!table || !num_rows)
return {};
approx_bytes_read_for_chunk = file_reader->GetRawORCReader()->getStripe(stripe_current)->getDataLength();
++stripe_current;
Chunk res;
/// If defaults_for_omitted_fields is true, calculate the default values from default expression for omitted fields.
/// Otherwise fill the missing columns with zero values of its type.
BlockMissingValues * block_missing_values_ptr = format_settings.defaults_for_omitted_fields ? &block_missing_values : nullptr;
arrow_column_to_ch_column->arrowTableToCHChunk(res, table, num_rows, block_missing_values_ptr);
return res;
}
void ORCBlockInputFormat::resetParser()
{
IInputFormat::resetParser();
file_reader.reset();
include_indices.clear();
block_missing_values.clear();
}
const BlockMissingValues & ORCBlockInputFormat::getMissingValues() const
{
return block_missing_values;
}
static void getFileReaderAndSchema(
ReadBuffer & in,
std::unique_ptr<arrow::adapters::orc::ORCFileReader> & file_reader,
std::shared_ptr<arrow::Schema> & schema,
const FormatSettings & format_settings,
std::atomic<int> & is_stopped)
{
auto arrow_file = asArrowFile(in, format_settings, is_stopped, "ORC", ORC_MAGIC_BYTES);
if (is_stopped)
return;
auto result = arrow::adapters::orc::ORCFileReader::Open(arrow_file, arrow::default_memory_pool());
if (!result.ok())
throw Exception::createDeprecated(result.status().ToString(), ErrorCodes::BAD_ARGUMENTS);
file_reader = std::move(result).ValueOrDie();
auto read_schema_result = file_reader->ReadSchema();
if (!read_schema_result.ok())
throw Exception::createDeprecated(read_schema_result.status().ToString(), ErrorCodes::BAD_ARGUMENTS);
schema = std::move(read_schema_result).ValueOrDie();
}
void ORCBlockInputFormat::prepareReader()
{
std::shared_ptr<arrow::Schema> schema;
getFileReaderAndSchema(*in, file_reader, schema, format_settings, is_stopped);
if (is_stopped)
return;
stripe_total = static_cast<int>(file_reader->NumberOfStripes());
stripe_current = 0;
arrow_column_to_ch_column = std::make_unique<ArrowColumnToCHColumn>(
getPort().getHeader(),
"ORC",
format_settings.orc.allow_missing_columns,
format_settings.null_as_default,
format_settings.orc.case_insensitive_column_matching);
const bool ignore_case = format_settings.orc.case_insensitive_column_matching;
std::unordered_set<String> nested_table_names = Nested::getAllTableNames(getPort().getHeader(), ignore_case);
for (int i = 0; i < schema->num_fields(); ++i)
{
const auto & name = schema->field(i)->name();
if (getPort().getHeader().has(name, ignore_case) || nested_table_names.contains(ignore_case ? boost::to_lower_copy(name) : name))
include_indices.push_back(i);
}
}
ORCSchemaReader::ORCSchemaReader(ReadBuffer & in_, const FormatSettings & format_settings_)
: ISchemaReader(in_), format_settings(format_settings_)
{
}
void ORCSchemaReader::initializeIfNeeded()
{
if (file_reader)
return;
std::atomic<int> is_stopped = 0;
getFileReaderAndSchema(in, file_reader, schema, format_settings, is_stopped);
}
NamesAndTypesList ORCSchemaReader::readSchema()
{
initializeIfNeeded();
auto header = ArrowColumnToCHColumn::arrowSchemaToCHHeader(
*schema, "ORC", format_settings.orc.skip_columns_with_unsupported_types_in_schema_inference);
if (format_settings.schema_inference_make_columns_nullable)
return getNamesAndRecursivelyNullableTypes(header);
return header.getNamesAndTypesList();
}
std::optional<size_t> ORCSchemaReader::readNumberOrRows()
{
initializeIfNeeded();
return file_reader->NumberOfRows();
}
void registerInputFormatORC(FormatFactory & factory)
{
factory.registerInputFormat(
"ORC",
[](ReadBuffer & buf, const Block & sample, const RowInputFormatParams &, const FormatSettings & settings)
{
InputFormatPtr res;
if (settings.orc.use_fast_decoder)
res = std::make_shared<NativeORCBlockInputFormat>(buf, sample, settings);
else
res = std::make_shared<ORCBlockInputFormat>(buf, sample, settings);
return res;
});
factory.markFormatSupportsSubsetOfColumns("ORC");
}
void registerORCSchemaReader(FormatFactory & factory)
{
factory.registerSchemaReader(
"ORC",
[](ReadBuffer & buf, const FormatSettings & settings)
{
SchemaReaderPtr res;
if (settings.orc.use_fast_decoder)
res = std::make_shared<NativeORCSchemaReader>(buf, settings);
else
res = std::make_shared<ORCSchemaReader>(buf, settings);
return res;
}
);
factory.registerAdditionalInfoForSchemaCacheGetter("ORC", [](const FormatSettings & settings)
{
return fmt::format("schema_inference_make_columns_nullable={}", settings.schema_inference_make_columns_nullable);
});
}
}
#else
namespace DB
{
class FormatFactory;
void registerInputFormatORC(FormatFactory &)
{
}
void registerORCSchemaReader(FormatFactory &)
{
}
}
#endif
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