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#include <IO/ReadBuffer.h>
#include <IO/ReadHelpers.h>
#include <Processors/Formats/Impl/BinaryRowInputFormat.h>
#include <Formats/FormatFactory.h>
#include <Formats/registerWithNamesAndTypes.h>
#include <DataTypes/DataTypeFactory.h>
namespace DB
{
namespace ErrorCodes
{
extern const int CANNOT_SKIP_UNKNOWN_FIELD;
}
template <bool with_defaults>
BinaryRowInputFormat<with_defaults>::BinaryRowInputFormat(ReadBuffer & in_, const Block & header, Params params_, bool with_names_, bool with_types_, const FormatSettings & format_settings_)
: RowInputFormatWithNamesAndTypes(
header,
in_,
params_,
true,
with_names_,
with_types_,
format_settings_,
std::make_unique<BinaryFormatReader<with_defaults>>(in_, format_settings_))
{
}
template <bool with_defaults>
BinaryFormatReader<with_defaults>::BinaryFormatReader(ReadBuffer & in_, const FormatSettings & format_settings_) : FormatWithNamesAndTypesReader(in_, format_settings_)
{
}
template <bool with_defaults>
std::vector<String> BinaryFormatReader<with_defaults>::readHeaderRow()
{
std::vector<String> fields;
String field;
for (size_t i = 0; i < read_columns; ++i)
{
readStringBinary(field, *in);
fields.push_back(field);
}
return fields;
}
template <bool with_defaults>
std::vector<String> BinaryFormatReader<with_defaults>::readNames()
{
readVarUInt(read_columns, *in);
return readHeaderRow();
}
template <bool with_defaults>
std::vector<String> BinaryFormatReader<with_defaults>::readTypes()
{
auto types = readHeaderRow();
for (const auto & type_name : types)
read_data_types.push_back(DataTypeFactory::instance().get(type_name));
return types;
}
template <bool with_defaults>
bool BinaryFormatReader<with_defaults>::readField(IColumn & column, const DataTypePtr & /*type*/, const SerializationPtr & serialization, bool /*is_last_file_column*/, const String & /*column_name*/)
{
if constexpr (with_defaults)
{
UInt8 is_default;
readBinary(is_default, *in);
if (is_default)
{
column.insertDefault();
return false;
}
}
serialization->deserializeBinary(column, *in, format_settings);
return true;
}
template <bool with_defaults>
void BinaryFormatReader<with_defaults>::skipHeaderRow()
{
String tmp;
for (size_t i = 0; i < read_columns; ++i)
readStringBinary(tmp, *in);
}
template <bool with_defaults>
void BinaryFormatReader<with_defaults>::skipNames()
{
readVarUInt(read_columns, *in);
skipHeaderRow();
}
template <bool with_defaults>
void BinaryFormatReader<with_defaults>::skipTypes()
{
if (read_columns == 0)
{
/// It's possible only when with_names = false and with_types = true
readVarUInt(read_columns, *in);
}
skipHeaderRow();
}
template <bool with_defaults>
void BinaryFormatReader<with_defaults>::skipField(size_t file_column)
{
if (file_column >= read_data_types.size())
throw Exception(ErrorCodes::CANNOT_SKIP_UNKNOWN_FIELD,
"Cannot skip unknown field in RowBinaryWithNames format, because it's type is unknown");
Field field;
read_data_types[file_column]->getDefaultSerialization()->deserializeBinary(field, *in, format_settings);
}
BinaryWithNamesAndTypesSchemaReader::BinaryWithNamesAndTypesSchemaReader(ReadBuffer & in_, const FormatSettings & format_settings_)
: FormatWithNamesAndTypesSchemaReader(in_, format_settings_, true, true, &reader), reader(in_, format_settings_)
{
}
void registerInputFormatRowBinary(FormatFactory & factory)
{
auto register_func = [&](const String & format_name, bool with_names, bool with_types)
{
factory.registerInputFormat(format_name, [with_names, with_types](
ReadBuffer & buf,
const Block & sample,
const IRowInputFormat::Params & params,
const FormatSettings & settings)
{
return std::make_shared<BinaryRowInputFormat<false>>(buf, sample, params, with_names, with_types, settings);
});
};
registerWithNamesAndTypes("RowBinary", register_func);
factory.registerFileExtension("bin", "RowBinary");
factory.registerInputFormat("RowBinaryWithDefaults", [](
ReadBuffer & buf,
const Block & sample,
const IRowInputFormat::Params & params,
const FormatSettings & settings)
{
return std::make_shared<BinaryRowInputFormat<true>>(buf, sample, params, false, false, settings);
});
}
void registerRowBinaryWithNamesAndTypesSchemaReader(FormatFactory & factory)
{
factory.registerSchemaReader("RowBinaryWithNamesAndTypes", [](ReadBuffer & buf, const FormatSettings & settings)
{
return std::make_shared<BinaryWithNamesAndTypesSchemaReader>(buf, settings);
});
}
}
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