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SerializationMap.cpp
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499 lines (423 loc) · 17.4 KB
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#include <DataTypes/Serializations/SerializationMap.h>
#include <DataTypes/Serializations/SerializationNullable.h>
#include <DataTypes/DataTypeMap.h>
#include <Common/StringUtils.h>
#include <Columns/ColumnArray.h>
#include <Columns/ColumnMap.h>
#include <Columns/ColumnTuple.h>
#include <Core/Field.h>
#include <Formats/FormatSettings.h>
#include <Formats/JSONUtils.h>
#include <Common/assert_cast.h>
#include <IO/WriteHelpers.h>
#include <IO/ReadHelpers.h>
#include <IO/WriteBufferFromString.h>
#include <IO/ReadBufferFromString.h>
namespace DB
{
namespace ErrorCodes
{
extern const int CANNOT_READ_MAP_FROM_TEXT;
extern const int TOO_LARGE_ARRAY_SIZE;
}
SerializationMap::SerializationMap(const SerializationPtr & key_, const SerializationPtr & value_, const SerializationPtr & nested_)
: key(key_), value(value_), nested(nested_)
{
}
static const IColumn & extractNestedColumn(const IColumn & column)
{
return assert_cast<const ColumnMap &>(column).getNestedColumn();
}
static IColumn & extractNestedColumn(IColumn & column)
{
return assert_cast<ColumnMap &>(column).getNestedColumn();
}
void SerializationMap::serializeBinary(const Field & field, WriteBuffer & ostr, const FormatSettings & settings) const
{
const auto & map = field.safeGet<Map>();
writeVarUInt(map.size(), ostr);
for (const auto & elem : map)
{
const auto & tuple = elem.safeGet<Tuple>();
assert(tuple.size() == 2);
key->serializeBinary(tuple[0], ostr, settings);
value->serializeBinary(tuple[1], ostr, settings);
}
}
void SerializationMap::deserializeBinary(Field & field, ReadBuffer & istr, const FormatSettings & settings) const
{
size_t size;
readVarUInt(size, istr);
if (settings.binary.max_binary_string_size && size > settings.binary.max_binary_string_size)
throw Exception(
ErrorCodes::TOO_LARGE_ARRAY_SIZE,
"Too large map size: {}. The maximum is: {}. To increase the maximum, use setting "
"format_binary_max_array_size",
size,
settings.binary.max_binary_string_size);
field = Map();
Map & map = field.safeGet<Map>();
map.reserve(size);
for (size_t i = 0; i < size; ++i)
{
Tuple tuple(2);
key->deserializeBinary(tuple[0], istr, settings);
value->deserializeBinary(tuple[1], istr, settings);
map.push_back(std::move(tuple));
}
}
void SerializationMap::serializeBinary(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
{
nested->serializeBinary(extractNestedColumn(column), row_num, ostr, settings);
}
void SerializationMap::deserializeBinary(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
{
nested->deserializeBinary(extractNestedColumn(column), istr, settings);
}
template <typename KeyWriter, typename ValueWriter>
void SerializationMap::serializeTextImpl(
const IColumn & column,
size_t row_num,
WriteBuffer & ostr,
KeyWriter && key_writer,
ValueWriter && value_writer) const
{
const auto & column_map = assert_cast<const ColumnMap &>(column);
const auto & nested_array = column_map.getNestedColumn();
const auto & nested_tuple = column_map.getNestedData();
const auto & offsets = nested_array.getOffsets();
size_t offset = offsets[row_num - 1];
size_t next_offset = offsets[row_num];
writeChar('{', ostr);
for (size_t i = offset; i < next_offset; ++i)
{
if (i != offset)
writeChar(',', ostr);
key_writer(ostr, key, nested_tuple.getColumn(0), i);
writeChar(':', ostr);
value_writer(ostr, value, nested_tuple.getColumn(1), i);
}
writeChar('}', ostr);
}
template <typename ReturnType, typename Reader>
ReturnType SerializationMap::deserializeTextImpl(IColumn & column, ReadBuffer & istr, Reader && reader) const
{
static constexpr bool throw_exception = std::is_same_v<ReturnType, void>;
auto & column_map = assert_cast<ColumnMap &>(column);
auto & nested_array = column_map.getNestedColumn();
auto & nested_tuple = column_map.getNestedData();
auto & offsets = nested_array.getOffsets();
auto & key_column = nested_tuple.getColumn(0);
auto & value_column = nested_tuple.getColumn(1);
size_t size = 0;
if constexpr (throw_exception)
assertChar('{', istr);
else if (!checkChar('{', istr))
return ReturnType(false);
auto on_error_no_throw = [&]()
{
if (size)
{
nested_tuple.getColumnPtr(0) = key_column.cut(0, offsets.back());
nested_tuple.getColumnPtr(1) = value_column.cut(0, offsets.back());
}
return ReturnType(false);
};
try
{
bool first = true;
while (!istr.eof() && *istr.position() != '}')
{
if (!first)
{
if (*istr.position() == ',')
{
++istr.position();
}
else
{
if constexpr (throw_exception)
throw Exception(ErrorCodes::CANNOT_READ_MAP_FROM_TEXT, "Cannot read Map from text");
return on_error_no_throw();
}
}
first = false;
skipWhitespaceIfAny(istr);
if (*istr.position() == '}')
break;
if constexpr (throw_exception)
reader(istr, key, key_column);
else if (!reader(istr, key, key_column))
return on_error_no_throw();
++size;
skipWhitespaceIfAny(istr);
if constexpr (throw_exception)
assertChar(':', istr);
else if (!checkChar(':', istr))
return on_error_no_throw();
skipWhitespaceIfAny(istr);
if constexpr (throw_exception)
reader(istr, value, value_column);
else if (!reader(istr, value, value_column))
return on_error_no_throw();
skipWhitespaceIfAny(istr);
}
if constexpr (throw_exception)
assertChar('}', istr);
else if (!checkChar('}', istr))
return on_error_no_throw();
}
catch (...)
{
if (size)
{
nested_tuple.getColumnPtr(0) = key_column.cut(0, offsets.back());
nested_tuple.getColumnPtr(1) = value_column.cut(0, offsets.back());
}
if constexpr (throw_exception)
throw;
return ReturnType(false);
}
offsets.push_back(offsets.back() + size);
return ReturnType(true);
}
void SerializationMap::serializeText(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
{
auto writer = [&settings](WriteBuffer & buf, const SerializationPtr & subcolumn_serialization, const IColumn & subcolumn, size_t pos)
{
subcolumn_serialization->serializeTextQuoted(subcolumn, pos, buf, settings);
};
serializeTextImpl(column, row_num, ostr, writer, writer);
}
void SerializationMap::deserializeText(IColumn & column, ReadBuffer & istr, const FormatSettings & settings, bool whole) const
{
deserializeTextImpl(column, istr,
[&settings](ReadBuffer & buf, const SerializationPtr & subcolumn_serialization, IColumn & subcolumn)
{
if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(subcolumn))
SerializationNullable::deserializeNullAsDefaultOrNestedTextQuoted(subcolumn, buf, settings, subcolumn_serialization);
else
subcolumn_serialization->deserializeTextQuoted(subcolumn, buf, settings);
});
if (whole && !istr.eof())
throwUnexpectedDataAfterParsedValue(column, istr, settings, "Map");
}
bool SerializationMap::tryDeserializeText(IColumn & column, ReadBuffer & istr, const FormatSettings & settings, bool whole) const
{
auto reader = [&settings](ReadBuffer & buf, const SerializationPtr & subcolumn_serialization, IColumn & subcolumn)
{
if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(subcolumn))
return SerializationNullable::tryDeserializeNullAsDefaultOrNestedTextQuoted(subcolumn, buf, settings, subcolumn_serialization);
return subcolumn_serialization->tryDeserializeTextQuoted(subcolumn, buf, settings);
};
auto ok = deserializeTextImpl<bool>(column, istr, reader);
if (!ok)
return false;
if (whole && !istr.eof())
{
column.popBack(1);
return false;
}
return true;
}
void SerializationMap::serializeTextJSON(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
{
if (settings.json.write_map_as_array_of_tuples)
{
nested->serializeTextJSON(extractNestedColumn(column), row_num, ostr, settings);
return;
}
serializeTextImpl(column, row_num, ostr,
[&settings](WriteBuffer & buf, const SerializationPtr & subcolumn_serialization, const IColumn & subcolumn, size_t pos)
{
/// We need to double-quote all keys (including integers) to produce valid JSON.
WriteBufferFromOwnString str_buf;
subcolumn_serialization->serializeText(subcolumn, pos, str_buf, settings);
writeJSONString(str_buf.str(), buf, settings);
},
[&settings](WriteBuffer & buf, const SerializationPtr & subcolumn_serialization, const IColumn & subcolumn, size_t pos)
{
subcolumn_serialization->serializeTextJSON(subcolumn, pos, buf, settings);
});
}
void SerializationMap::serializeTextJSONPretty(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings, size_t indent) const
{
if (settings.json.write_map_as_array_of_tuples)
{
nested->serializeTextJSONPretty(extractNestedColumn(column), row_num, ostr, settings, indent);
return;
}
const auto & column_map = assert_cast<const ColumnMap &>(column);
const auto & nested_array = column_map.getNestedColumn();
const auto & nested_tuple = column_map.getNestedData();
const auto & offsets = nested_array.getOffsets();
size_t offset = offsets[row_num - 1];
size_t next_offset = offsets[row_num];
if (offset == next_offset)
{
writeCString("{}", ostr);
return;
}
writeCString("{\n", ostr);
for (size_t i = offset; i < next_offset; ++i)
{
if (i != offset)
writeCString(",\n", ostr);
WriteBufferFromOwnString str_buf;
key->serializeText(nested_tuple.getColumn(0), i, str_buf, settings);
writeChar(settings.json.pretty_print_indent, (indent + 1) * settings.json.pretty_print_indent_multiplier, ostr);
writeJSONString(str_buf.str(), ostr, settings);
writeCString(": ", ostr);
value->serializeTextJSONPretty(nested_tuple.getColumn(1), i, ostr, settings, indent + 1);
}
writeChar('\n', ostr);
writeChar(settings.json.pretty_print_indent, indent * settings.json.pretty_print_indent_multiplier, ostr);
writeChar('}', ostr);
}
template <typename ReturnType>
ReturnType SerializationMap::deserializeTextJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
{
auto deserialize_nested = [&settings](IColumn & subcolumn, ReadBuffer & buf, const SerializationPtr & subcolumn_serialization) -> ReturnType
{
if constexpr (std::is_same_v<ReturnType, void>)
{
if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(subcolumn))
SerializationNullable::deserializeNullAsDefaultOrNestedTextJSON(subcolumn, buf, settings, subcolumn_serialization);
else
subcolumn_serialization->deserializeTextJSON(subcolumn, buf, settings);
}
else
{
if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(subcolumn))
return SerializationNullable::tryDeserializeNullAsDefaultOrNestedTextJSON(subcolumn, buf, settings, subcolumn_serialization);
return subcolumn_serialization->tryDeserializeTextJSON(subcolumn, buf, settings);
}
};
if (settings.json.empty_as_default)
return deserializeTextImpl<ReturnType>(column, istr,
[&deserialize_nested](ReadBuffer & buf, const SerializationPtr & subcolumn_serialization, IColumn & subcolumn) -> ReturnType
{
return JSONUtils::deserializeEmpyStringAsDefaultOrNested<ReturnType>(subcolumn, buf,
[&deserialize_nested, &subcolumn_serialization](IColumn & subcolumn_, ReadBuffer & buf_) -> ReturnType
{
return deserialize_nested(subcolumn_, buf_, subcolumn_serialization);
});
});
return deserializeTextImpl<ReturnType>(
column,
istr,
[&deserialize_nested](ReadBuffer & buf, const SerializationPtr & subcolumn_serialization, IColumn & subcolumn) -> ReturnType
{ return deserialize_nested(subcolumn, buf, subcolumn_serialization); });
}
void SerializationMap::deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
{
if (settings.json.read_map_as_array_of_tuples)
{
nested->deserializeTextJSON(extractNestedColumn(column), istr, settings);
return;
}
deserializeTextJSONImpl<void>(column, istr, settings);
}
bool SerializationMap::tryDeserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
{
if (settings.json.read_map_as_array_of_tuples)
{
return nested->tryDeserializeTextJSON(extractNestedColumn(column), istr, settings);
}
return deserializeTextJSONImpl<bool>(column, istr, settings);
}
void SerializationMap::serializeTextXML(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
{
const auto & column_map = assert_cast<const ColumnMap &>(column);
const auto & offsets = column_map.getNestedColumn().getOffsets();
size_t offset = offsets[row_num - 1];
size_t next_offset = offsets[row_num];
const auto & nested_data = column_map.getNestedData();
writeCString("<map>", ostr);
for (size_t i = offset; i < next_offset; ++i)
{
writeCString("<elem>", ostr);
writeCString("<key>", ostr);
key->serializeTextXML(nested_data.getColumn(0), i, ostr, settings);
writeCString("</key>", ostr);
writeCString("<value>", ostr);
value->serializeTextXML(nested_data.getColumn(1), i, ostr, settings);
writeCString("</value>", ostr);
writeCString("</elem>", ostr);
}
writeCString("</map>", ostr);
}
void SerializationMap::serializeTextCSV(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
{
WriteBufferFromOwnString wb;
serializeText(column, row_num, wb, settings);
writeCSV(wb.str(), ostr);
}
void SerializationMap::deserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
{
String s;
readCSV(s, istr, settings.csv);
ReadBufferFromString rb(s);
deserializeText(column, rb, settings, true);
}
bool SerializationMap::tryDeserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
{
String s;
if (!tryReadCSV(s, istr, settings.csv))
return false;
ReadBufferFromString rb(s);
return tryDeserializeText(column, rb, settings, true);
}
void SerializationMap::enumerateStreams(
EnumerateStreamsSettings & settings,
const StreamCallback & callback,
const SubstreamData & data) const
{
auto next_data = SubstreamData(nested)
.withType(data.type ? assert_cast<const DataTypeMap &>(*data.type).getNestedType() : nullptr)
.withColumn(data.column ? assert_cast<const ColumnMap &>(*data.column).getNestedColumnPtr() : nullptr)
.withSerializationInfo(data.serialization_info)
.withDeserializeState(data.deserialize_state);
nested->enumerateStreams(settings, callback, next_data);
}
void SerializationMap::serializeBinaryBulkStatePrefix(
const IColumn & column,
SerializeBinaryBulkSettings & settings,
SerializeBinaryBulkStatePtr & state) const
{
nested->serializeBinaryBulkStatePrefix(extractNestedColumn(column), settings, state);
}
void SerializationMap::serializeBinaryBulkStateSuffix(
SerializeBinaryBulkSettings & settings,
SerializeBinaryBulkStatePtr & state) const
{
nested->serializeBinaryBulkStateSuffix(settings, state);
}
void SerializationMap::deserializeBinaryBulkStatePrefix(
DeserializeBinaryBulkSettings & settings,
DeserializeBinaryBulkStatePtr & state,
SubstreamsDeserializeStatesCache * cache) const
{
nested->deserializeBinaryBulkStatePrefix(settings, state, cache);
}
void SerializationMap::serializeBinaryBulkWithMultipleStreams(
const IColumn & column,
size_t offset,
size_t limit,
SerializeBinaryBulkSettings & settings,
SerializeBinaryBulkStatePtr & state) const
{
nested->serializeBinaryBulkWithMultipleStreams(extractNestedColumn(column), offset, limit, settings, state);
}
void SerializationMap::deserializeBinaryBulkWithMultipleStreams(
ColumnPtr & column,
size_t rows_offset,
size_t limit,
DeserializeBinaryBulkSettings & settings,
DeserializeBinaryBulkStatePtr & state,
SubstreamsCache * cache) const
{
auto & column_map = assert_cast<ColumnMap &>(*column->assumeMutable());
nested->deserializeBinaryBulkWithMultipleStreams(column_map.getNestedColumnPtr(), rows_offset, limit, settings, state, cache);
}
}