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#include <Processors/Formats/Impl/HiveTextRowInputFormat.h>
#include <Common/assert_cast.h>
#if USE_HIVE
namespace DB
{
namespace ErrorCodes
{
extern const int NOT_IMPLEMENTED;
}
static FormatSettings updateFormatSettings(const FormatSettings & settings, const Block & header)
{
FormatSettings updated = settings;
updated.skip_unknown_fields = true;
updated.with_names_use_header = true;
updated.date_time_input_format = FormatSettings::DateTimeInputFormat::BestEffort;
updated.csv.delimiter = updated.hive_text.fields_delimiter;
if (settings.hive_text.input_field_names.empty())
updated.hive_text.input_field_names = header.getNames();
return updated;
}
HiveTextRowInputFormat::HiveTextRowInputFormat(
const Block & header_, ReadBuffer & in_, const Params & params_, const FormatSettings & format_settings_)
: HiveTextRowInputFormat(header_, std::make_unique<PeekableReadBuffer>(in_), params_, updateFormatSettings(format_settings_, header_))
{
}
HiveTextRowInputFormat::HiveTextRowInputFormat(
const Block & header_, std::shared_ptr<PeekableReadBuffer> buf_, const Params & params_, const FormatSettings & format_settings_)
: CSVRowInputFormat(
header_, buf_, params_, true, false, format_settings_, std::make_unique<HiveTextFormatReader>(*buf_, format_settings_))
{
}
HiveTextFormatReader::HiveTextFormatReader(PeekableReadBuffer & buf_, const FormatSettings & format_settings_)
: CSVFormatReader(buf_, format_settings_), input_field_names(format_settings_.hive_text.input_field_names)
{
}
std::vector<String> HiveTextFormatReader::readNames()
{
PeekableReadBufferCheckpoint checkpoint{*buf, true};
auto values = readHeaderRow();
input_field_names.resize(values.size());
return input_field_names;
}
std::vector<String> HiveTextFormatReader::readTypes()
{
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "HiveTextRowInputFormat::readTypes is not implemented");
}
void registerInputFormatHiveText(FormatFactory & factory)
{
factory.registerInputFormat(
"HiveText", [](ReadBuffer & buf, const Block & sample, const RowInputFormatParams & params, const FormatSettings & settings)
{
return std::make_shared<HiveTextRowInputFormat>(sample, buf, params, settings);
});
}
void registerFileSegmentationEngineHiveText(FormatFactory & factory)
{
factory.registerFileSegmentationEngine(
"HiveText",
[](ReadBuffer & in, DB::Memory<> & memory, size_t min_bytes, size_t max_rows) -> std::pair<bool, size_t> {
return fileSegmentationEngineCSVImpl(in, memory, min_bytes, 0, max_rows);
});
}
}
#endif
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